./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f 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/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-bcb38a6-m [2024-06-03 20:13:47,092 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:13:47,160 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:13:47,164 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:13:47,164 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:13:47,188 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:13:47,189 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:13:47,189 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:13:47,190 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:13:47,193 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:13:47,193 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:13:47,193 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:13:47,194 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:13:47,195 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:13:47,195 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:13:47,195 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:13:47,196 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:13:47,196 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:13:47,196 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:13:47,196 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:13:47,196 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:13:47,197 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:13:47,197 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:13:47,197 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:13:47,198 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:13:47,198 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:13:47,198 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:13:47,198 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:13:47,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:13:47,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:13:47,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:13:47,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:13:47,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:13:47,201 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:13:47,201 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:13:47,201 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:13:47,201 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:13:47,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:13:47,202 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:13:47,202 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:13:47,202 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:13:47,202 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:13:47,202 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:13:47,203 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:13:47,421 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:13:47,441 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:13:47,443 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:13:47,444 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:13:47,444 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:13:47,445 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:13:48,508 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:13:48,702 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:13:48,703 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:13:48,713 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9219ffd/89610b4f2dd94523b7977dba3e81c858/FLAG90110c384 [2024-06-03 20:13:48,728 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4b9219ffd/89610b4f2dd94523b7977dba3e81c858 [2024-06-03 20:13:48,731 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:13:48,731 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:13:48,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.yml/witness.yml [2024-06-03 20:13:48,855 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:13:48,856 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:13:48,857 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:13:48,857 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:13:48,865 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:13:48,865 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:13:48" (1/2) ... [2024-06-03 20:13:48,866 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8880d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:13:48, skipping insertion in model container [2024-06-03 20:13:48,866 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:13:48" (1/2) ... [2024-06-03 20:13:48,867 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@57f56474 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:13:48, skipping insertion in model container [2024-06-03 20:13:48,867 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:13:48" (2/2) ... [2024-06-03 20:13:48,868 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7e8880d2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:48, skipping insertion in model container [2024-06-03 20:13:48,868 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:13:48" (2/2) ... [2024-06-03 20:13:48,868 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:13:48,936 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:13:48,938 INFO L97 edCorrectnessWitness]: Location invariant before [L838-L838] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-03 20:13:48,938 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-03 20:13:48,938 INFO L97 edCorrectnessWitness]: Location invariant before [L836-L836] ((((((((((((((((((! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1))) && (! multithreaded || ((0 <= x$mem_tmp && x$mem_tmp <= 1) && (x$mem_tmp == 0 || x$mem_tmp == 1)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p0_EAX && __unbuffered_p0_EAX <= 1) && (__unbuffered_p0_EAX == 0 || __unbuffered_p0_EAX == 1)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1)))) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || ((0 <= x$w_buff1 && x$w_buff1 <= 1) && (x$w_buff1 == 0 || x$w_buff1 == 1)))) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((0 <= x$w_buff0 && x$w_buff0 <= 1) && (x$w_buff0 == 0 || x$w_buff0 == 1))) [2024-06-03 20:13:48,938 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:13:48,938 INFO L106 edCorrectnessWitness]: ghost_update [L834-L834] multithreaded = 1; [2024-06-03 20:13:48,978 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:13:49,256 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:13:49,264 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:13:49,420 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:13:49,482 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:13:49,483 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49 WrapperNode [2024-06-03 20:13:49,483 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:13:49,485 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:13:49,485 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:13:49,485 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:13:49,491 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 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,524 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 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,554 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 126 [2024-06-03 20:13:49,557 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:13:49,558 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:13:49,558 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:13:49,558 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:13:49,567 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,567 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,581 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,597 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]. [2024-06-03 20:13:49,600 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,600 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,613 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,620 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,621 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,627 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,630 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:13:49,633 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:13:49,634 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:13:49,634 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:13:49,634 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (1/1) ... [2024-06-03 20:13:49,638 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:13:49,644 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:13:49,657 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) [2024-06-03 20:13:49,676 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 [2024-06-03 20:13:49,689 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:13:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:13:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:13:49,690 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:13:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:13:49,690 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:13:49,690 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:13:49,691 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:13:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:13:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:13:49,691 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:13:49,691 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:13:49,692 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:13:49,825 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:13:49,827 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:13:50,085 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:13:50,096 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:13:50,229 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:13:50,230 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:13:50,231 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:13:50 BoogieIcfgContainer [2024-06-03 20:13:50,231 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:13:50,233 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:13:50,233 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:13:50,235 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:13:50,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:13:48" (1/4) ... [2024-06-03 20:13:50,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a958110 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:13:50, skipping insertion in model container [2024-06-03 20:13:50,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:13:48" (2/4) ... [2024-06-03 20:13:50,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a958110 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:13:50, skipping insertion in model container [2024-06-03 20:13:50,237 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:13:49" (3/4) ... [2024-06-03 20:13:50,237 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1a958110 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:13:50, skipping insertion in model container [2024-06-03 20:13:50,238 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:13:50" (4/4) ... [2024-06-03 20:13:50,239 INFO L112 eAbstractionObserver]: Analyzing ICFG safe024_power.oepc_power.opt_pso.oepc_pso.opt_rmo.oepc_rmo.opt.i [2024-06-03 20:13:50,253 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:13:50,253 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:13:50,253 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:13:50,302 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:13:50,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:13:50,357 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 20:13:50,357 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:13:50,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 20:13:50,359 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 20:13:50,363 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 20:13:50,375 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:13:50,381 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;@57f38f7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:13:50,381 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:13:50,388 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:13:50,388 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:13:50,388 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:13:50,388 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:50,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:13:50,389 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:50,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:50,435 INFO L85 PathProgramCache]: Analyzing trace with hash -1623706950, now seen corresponding path program 1 times [2024-06-03 20:13:50,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:50,442 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587508079] [2024-06-03 20:13:50,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:50,442 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:50,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:51,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:51,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:51,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587508079] [2024-06-03 20:13:51,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1587508079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:51,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:51,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:13:51,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798053227] [2024-06-03 20:13:51,497 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:51,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:13:51,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:51,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:13:51,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:13:51,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-03 20:13:51,573 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:51,573 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:51,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-03 20:13:51,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:51,875 INFO L124 PetriNetUnfolderBase]: 942/1466 cut-off events. [2024-06-03 20:13:51,876 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2024-06-03 20:13:51,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2984 conditions, 1466 events. 942/1466 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 7280 event pairs, 546 based on Foata normal form. 2/1428 useless extension candidates. Maximal degree in co-relation 2969. Up to 1428 conditions per place. [2024-06-03 20:13:51,889 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 33 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2024-06-03 20:13:51,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 44 transitions, 177 flow [2024-06-03 20:13:51,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:13:51,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:13:51,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 79 transitions. [2024-06-03 20:13:51,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.626984126984127 [2024-06-03 20:13:51,900 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 79 transitions. [2024-06-03 20:13:51,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 44 transitions, 177 flow [2024-06-03 20:13:51,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 44 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:51,905 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 20:13:51,907 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 20:13:51,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 20:13:51,910 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 20:13:51,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:51,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:51,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:51,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:13:51,911 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:51,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:51,912 INFO L85 PathProgramCache]: Analyzing trace with hash -1309217895, now seen corresponding path program 1 times [2024-06-03 20:13:51,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:51,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018913714] [2024-06-03 20:13:51,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:51,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:51,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:52,344 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:52,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:52,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018913714] [2024-06-03 20:13:52,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018913714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:52,345 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:52,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:13:52,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496504275] [2024-06-03 20:13:52,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:52,347 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:13:52,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:52,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:13:52,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:13:52,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 20:13:52,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:52,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:52,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 20:13:52,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:52,608 INFO L124 PetriNetUnfolderBase]: 1134/1736 cut-off events. [2024-06-03 20:13:52,608 INFO L125 PetriNetUnfolderBase]: For 279/279 co-relation queries the response was YES. [2024-06-03 20:13:52,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4015 conditions, 1736 events. 1134/1736 cut-off events. For 279/279 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8267 event pairs, 590 based on Foata normal form. 6/1740 useless extension candidates. Maximal degree in co-relation 4000. Up to 1676 conditions per place. [2024-06-03 20:13:52,617 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 7 changer transitions 0/57 dead transitions. [2024-06-03 20:13:52,617 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 57 transitions, 262 flow [2024-06-03 20:13:52,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:13:52,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:13:52,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 99 transitions. [2024-06-03 20:13:52,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2024-06-03 20:13:52,619 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 99 transitions. [2024-06-03 20:13:52,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 57 transitions, 262 flow [2024-06-03 20:13:52,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 57 transitions, 256 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:13:52,621 INFO L231 Difference]: Finished difference. Result has 47 places, 42 transitions, 154 flow [2024-06-03 20:13:52,621 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=154, PETRI_PLACES=47, PETRI_TRANSITIONS=42} [2024-06-03 20:13:52,622 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 4 predicate places. [2024-06-03 20:13:52,622 INFO L495 AbstractCegarLoop]: Abstraction has has 47 places, 42 transitions, 154 flow [2024-06-03 20:13:52,622 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:52,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:52,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:52,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:13:52,623 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:52,623 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:52,624 INFO L85 PathProgramCache]: Analyzing trace with hash -895031745, now seen corresponding path program 1 times [2024-06-03 20:13:52,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:52,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26842615] [2024-06-03 20:13:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:52,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:52,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:53,335 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:53,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:53,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26842615] [2024-06-03 20:13:53,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26842615] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:53,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:53,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:13:53,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483860422] [2024-06-03 20:13:53,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:53,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:13:53,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:53,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:13:53,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:13:53,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 20:13:53,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 42 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:53,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:53,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 20:13:53,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:53,672 INFO L124 PetriNetUnfolderBase]: 980/1529 cut-off events. [2024-06-03 20:13:53,673 INFO L125 PetriNetUnfolderBase]: For 738/740 co-relation queries the response was YES. [2024-06-03 20:13:53,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3913 conditions, 1529 events. 980/1529 cut-off events. For 738/740 co-relation queries the response was YES. Maximal size of possible extension queue 89. Compared 7468 event pairs, 562 based on Foata normal form. 3/1488 useless extension candidates. Maximal degree in co-relation 3895. Up to 1473 conditions per place. [2024-06-03 20:13:53,681 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 41 selfloop transitions, 10 changer transitions 0/60 dead transitions. [2024-06-03 20:13:53,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 60 transitions, 310 flow [2024-06-03 20:13:53,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:13:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:13:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-03 20:13:53,683 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2024-06-03 20:13:53,683 INFO L175 Difference]: Start difference. First operand has 47 places, 42 transitions, 154 flow. Second operand 5 states and 106 transitions. [2024-06-03 20:13:53,683 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 60 transitions, 310 flow [2024-06-03 20:13:53,684 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 60 transitions, 308 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:13:53,685 INFO L231 Difference]: Finished difference. Result has 53 places, 48 transitions, 223 flow [2024-06-03 20:13:53,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=223, PETRI_PLACES=53, PETRI_TRANSITIONS=48} [2024-06-03 20:13:53,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 10 predicate places. [2024-06-03 20:13:53,686 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 48 transitions, 223 flow [2024-06-03 20:13:53,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.666666666666666) internal successors, (82), 6 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:53,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:53,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:53,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:13:53,687 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:53,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:53,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1057930921, now seen corresponding path program 1 times [2024-06-03 20:13:53,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:53,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672661504] [2024-06-03 20:13:53,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:53,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:53,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:54,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:54,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:54,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672661504] [2024-06-03 20:13:54,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672661504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:54,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:54,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:13:54,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721683046] [2024-06-03 20:13:54,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:54,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:13:54,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:54,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:13:54,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:13:54,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-03 20:13:54,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 48 transitions, 223 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) [2024-06-03 20:13:54,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:54,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-03 20:13:54,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:55,041 INFO L124 PetriNetUnfolderBase]: 1122/1717 cut-off events. [2024-06-03 20:13:55,042 INFO L125 PetriNetUnfolderBase]: For 1602/1610 co-relation queries the response was YES. [2024-06-03 20:13:55,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5032 conditions, 1717 events. 1122/1717 cut-off events. For 1602/1610 co-relation queries the response was YES. Maximal size of possible extension queue 91. Compared 8159 event pairs, 380 based on Foata normal form. 12/1727 useless extension candidates. Maximal degree in co-relation 5009. Up to 1627 conditions per place. [2024-06-03 20:13:55,051 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 12 changer transitions 0/78 dead transitions. [2024-06-03 20:13:55,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 78 transitions, 449 flow [2024-06-03 20:13:55,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:55,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:55,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 20:13:55,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-03 20:13:55,053 INFO L175 Difference]: Start difference. First operand has 53 places, 48 transitions, 223 flow. Second operand 6 states and 138 transitions. [2024-06-03 20:13:55,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 78 transitions, 449 flow [2024-06-03 20:13:55,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 78 transitions, 436 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 20:13:55,056 INFO L231 Difference]: Finished difference. Result has 57 places, 52 transitions, 267 flow [2024-06-03 20:13:55,056 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=267, PETRI_PLACES=57, PETRI_TRANSITIONS=52} [2024-06-03 20:13:55,057 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-03 20:13:55,057 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 52 transitions, 267 flow [2024-06-03 20:13:55,057 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) [2024-06-03 20:13:55,057 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:55,057 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:55,058 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:13:55,058 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:55,058 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:55,058 INFO L85 PathProgramCache]: Analyzing trace with hash -1976179622, now seen corresponding path program 1 times [2024-06-03 20:13:55,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:55,059 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112035917] [2024-06-03 20:13:55,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:55,059 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:55,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:55,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:55,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:55,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112035917] [2024-06-03 20:13:55,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [112035917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:55,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:55,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:13:55,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534508203] [2024-06-03 20:13:55,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:55,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:13:55,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:55,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:13:55,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:13:55,768 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:13:55,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 52 transitions, 267 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:55,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:55,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:13:55,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:56,061 INFO L124 PetriNetUnfolderBase]: 1182/1836 cut-off events. [2024-06-03 20:13:56,061 INFO L125 PetriNetUnfolderBase]: For 2974/2978 co-relation queries the response was YES. [2024-06-03 20:13:56,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5776 conditions, 1836 events. 1182/1836 cut-off events. For 2974/2978 co-relation queries the response was YES. Maximal size of possible extension queue 92. Compared 8986 event pairs, 517 based on Foata normal form. 2/1815 useless extension candidates. Maximal degree in co-relation 5751. Up to 1727 conditions per place. [2024-06-03 20:13:56,072 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 11 changer transitions 0/76 dead transitions. [2024-06-03 20:13:56,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 76 transitions, 485 flow [2024-06-03 20:13:56,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:56,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:56,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-03 20:13:56,073 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-03 20:13:56,074 INFO L175 Difference]: Start difference. First operand has 57 places, 52 transitions, 267 flow. Second operand 6 states and 118 transitions. [2024-06-03 20:13:56,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 76 transitions, 485 flow [2024-06-03 20:13:56,079 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 76 transitions, 456 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-03 20:13:56,082 INFO L231 Difference]: Finished difference. Result has 62 places, 61 transitions, 338 flow [2024-06-03 20:13:56,083 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=242, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=338, PETRI_PLACES=62, PETRI_TRANSITIONS=61} [2024-06-03 20:13:56,085 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-03 20:13:56,085 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 61 transitions, 338 flow [2024-06-03 20:13:56,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:56,088 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:56,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:56,089 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:13:56,090 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:56,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:56,090 INFO L85 PathProgramCache]: Analyzing trace with hash -1138700578, now seen corresponding path program 1 times [2024-06-03 20:13:56,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:56,090 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918306894] [2024-06-03 20:13:56,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:56,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:56,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:56,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:56,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:56,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918306894] [2024-06-03 20:13:56,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918306894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:56,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:56,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:13:56,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884059280] [2024-06-03 20:13:56,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:56,747 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:13:56,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:56,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:13:56,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:13:56,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:13:56,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 61 transitions, 338 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:56,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:56,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:13:56,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:57,223 INFO L124 PetriNetUnfolderBase]: 1263/1942 cut-off events. [2024-06-03 20:13:57,224 INFO L125 PetriNetUnfolderBase]: For 3886/3903 co-relation queries the response was YES. [2024-06-03 20:13:57,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6561 conditions, 1942 events. 1263/1942 cut-off events. For 3886/3903 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 9416 event pairs, 500 based on Foata normal form. 16/1950 useless extension candidates. Maximal degree in co-relation 6532. Up to 1853 conditions per place. [2024-06-03 20:13:57,236 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 61 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-06-03 20:13:57,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 83 transitions, 550 flow [2024-06-03 20:13:57,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:57,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:57,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-03 20:13:57,237 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 20:13:57,237 INFO L175 Difference]: Start difference. First operand has 62 places, 61 transitions, 338 flow. Second operand 6 states and 122 transitions. [2024-06-03 20:13:57,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 83 transitions, 550 flow [2024-06-03 20:13:57,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 544 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 20:13:57,243 INFO L231 Difference]: Finished difference. Result has 67 places, 64 transitions, 386 flow [2024-06-03 20:13:57,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=332, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=386, PETRI_PLACES=67, PETRI_TRANSITIONS=64} [2024-06-03 20:13:57,245 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-03 20:13:57,246 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 64 transitions, 386 flow [2024-06-03 20:13:57,246 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:57,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:57,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:57,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:13:57,246 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:57,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:57,247 INFO L85 PathProgramCache]: Analyzing trace with hash -854978038, now seen corresponding path program 2 times [2024-06-03 20:13:57,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:57,250 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1676047636] [2024-06-03 20:13:57,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:57,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:57,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:57,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1676047636] [2024-06-03 20:13:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1676047636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:57,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:57,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:13:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116399676] [2024-06-03 20:13:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:13:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:13:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:13:58,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:13:58,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 64 transitions, 386 flow. Second operand has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:58,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:58,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:13:58,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:58,376 INFO L124 PetriNetUnfolderBase]: 1293/1988 cut-off events. [2024-06-03 20:13:58,376 INFO L125 PetriNetUnfolderBase]: For 5428/5446 co-relation queries the response was YES. [2024-06-03 20:13:58,381 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7324 conditions, 1988 events. 1293/1988 cut-off events. For 5428/5446 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9716 event pairs, 499 based on Foata normal form. 13/1990 useless extension candidates. Maximal degree in co-relation 7292. Up to 1865 conditions per place. [2024-06-03 20:13:58,390 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 59 selfloop transitions, 19 changer transitions 0/87 dead transitions. [2024-06-03 20:13:58,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 87 transitions, 628 flow [2024-06-03 20:13:58,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:13:58,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:13:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-03 20:13:58,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 20:13:58,393 INFO L175 Difference]: Start difference. First operand has 67 places, 64 transitions, 386 flow. Second operand 6 states and 122 transitions. [2024-06-03 20:13:58,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 87 transitions, 628 flow [2024-06-03 20:13:58,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 87 transitions, 598 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:13:58,399 INFO L231 Difference]: Finished difference. Result has 70 places, 70 transitions, 464 flow [2024-06-03 20:13:58,399 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=464, PETRI_PLACES=70, PETRI_TRANSITIONS=70} [2024-06-03 20:13:58,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-03 20:13:58,400 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 70 transitions, 464 flow [2024-06-03 20:13:58,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 12.571428571428571) internal successors, (88), 7 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:58,400 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:58,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:58,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:13:58,401 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:58,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:58,401 INFO L85 PathProgramCache]: Analyzing trace with hash -854969110, now seen corresponding path program 1 times [2024-06-03 20:13:58,401 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:58,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449355125] [2024-06-03 20:13:58,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:58,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:58,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:13:59,255 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:13:59,255 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:13:59,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449355125] [2024-06-03 20:13:59,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449355125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:13:59,256 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:13:59,256 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:13:59,256 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156567457] [2024-06-03 20:13:59,256 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:13:59,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:13:59,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:13:59,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:13:59,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:13:59,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:13:59,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 70 transitions, 464 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:59,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:13:59,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:13:59,416 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:13:59,812 INFO L124 PetriNetUnfolderBase]: 1265/1960 cut-off events. [2024-06-03 20:13:59,813 INFO L125 PetriNetUnfolderBase]: For 7349/7369 co-relation queries the response was YES. [2024-06-03 20:13:59,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7623 conditions, 1960 events. 1265/1960 cut-off events. For 7349/7369 co-relation queries the response was YES. Maximal size of possible extension queue 94. Compared 9755 event pairs, 504 based on Foata normal form. 2/1932 useless extension candidates. Maximal degree in co-relation 7589. Up to 1824 conditions per place. [2024-06-03 20:13:59,833 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 65 selfloop transitions, 14 changer transitions 0/92 dead transitions. [2024-06-03 20:13:59,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 92 transitions, 684 flow [2024-06-03 20:13:59,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:13:59,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:13:59,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 20:13:59,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-03 20:13:59,837 INFO L175 Difference]: Start difference. First operand has 70 places, 70 transitions, 464 flow. Second operand 7 states and 136 transitions. [2024-06-03 20:13:59,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 92 transitions, 684 flow [2024-06-03 20:13:59,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 92 transitions, 653 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:13:59,843 INFO L231 Difference]: Finished difference. Result has 75 places, 73 transitions, 489 flow [2024-06-03 20:13:59,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=489, PETRI_PLACES=75, PETRI_TRANSITIONS=73} [2024-06-03 20:13:59,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-03 20:13:59,845 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 73 transitions, 489 flow [2024-06-03 20:13:59,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:13:59,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:13:59,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:13:59,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:13:59,846 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:13:59,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:13:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash -939978853, now seen corresponding path program 1 times [2024-06-03 20:13:59,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:13:59,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120469643] [2024-06-03 20:13:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:13:59,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:13:59,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:00,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:00,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:00,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120469643] [2024-06-03 20:14:00,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120469643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:00,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:00,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:00,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877825294] [2024-06-03 20:14:00,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:00,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:00,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:00,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:00,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:00,689 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:00,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 73 transitions, 489 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:00,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:00,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:00,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:01,107 INFO L124 PetriNetUnfolderBase]: 1364/2081 cut-off events. [2024-06-03 20:14:01,107 INFO L125 PetriNetUnfolderBase]: For 8374/8374 co-relation queries the response was YES. [2024-06-03 20:14:01,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8515 conditions, 2081 events. 1364/2081 cut-off events. For 8374/8374 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10006 event pairs, 518 based on Foata normal form. 4/2083 useless extension candidates. Maximal degree in co-relation 8479. Up to 1981 conditions per place. [2024-06-03 20:14:01,118 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 87 selfloop transitions, 14 changer transitions 0/106 dead transitions. [2024-06-03 20:14:01,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 106 transitions, 815 flow [2024-06-03 20:14:01,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:01,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:01,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-03 20:14:01,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45918367346938777 [2024-06-03 20:14:01,120 INFO L175 Difference]: Start difference. First operand has 75 places, 73 transitions, 489 flow. Second operand 7 states and 135 transitions. [2024-06-03 20:14:01,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 106 transitions, 815 flow [2024-06-03 20:14:01,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 106 transitions, 783 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:01,127 INFO L231 Difference]: Finished difference. Result has 79 places, 82 transitions, 575 flow [2024-06-03 20:14:01,127 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=575, PETRI_PLACES=79, PETRI_TRANSITIONS=82} [2024-06-03 20:14:01,128 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 36 predicate places. [2024-06-03 20:14:01,128 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 82 transitions, 575 flow [2024-06-03 20:14:01,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:01,128 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:01,128 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:01,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:14:01,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:01,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:01,129 INFO L85 PathProgramCache]: Analyzing trace with hash -734514705, now seen corresponding path program 2 times [2024-06-03 20:14:01,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:01,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480813454] [2024-06-03 20:14:01,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:01,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:01,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:01,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:01,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:01,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480813454] [2024-06-03 20:14:01,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480813454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:01,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:01,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:01,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807085328] [2024-06-03 20:14:01,852 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:01,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:01,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:01,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:01,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:01,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 82 transitions, 575 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:01,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:01,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:01,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:02,324 INFO L124 PetriNetUnfolderBase]: 1402/2146 cut-off events. [2024-06-03 20:14:02,325 INFO L125 PetriNetUnfolderBase]: For 10942/10942 co-relation queries the response was YES. [2024-06-03 20:14:02,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9318 conditions, 2146 events. 1402/2146 cut-off events. For 10942/10942 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10406 event pairs, 530 based on Foata normal form. 4/2146 useless extension candidates. Maximal degree in co-relation 9279. Up to 1953 conditions per place. [2024-06-03 20:14:02,335 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 25 changer transitions 0/114 dead transitions. [2024-06-03 20:14:02,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 114 transitions, 951 flow [2024-06-03 20:14:02,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:02,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 20:14:02,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-03 20:14:02,337 INFO L175 Difference]: Start difference. First operand has 79 places, 82 transitions, 575 flow. Second operand 7 states and 139 transitions. [2024-06-03 20:14:02,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 114 transitions, 951 flow [2024-06-03 20:14:02,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 114 transitions, 925 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-03 20:14:02,347 INFO L231 Difference]: Finished difference. Result has 85 places, 90 transitions, 682 flow [2024-06-03 20:14:02,347 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=85, PETRI_TRANSITIONS=90} [2024-06-03 20:14:02,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 42 predicate places. [2024-06-03 20:14:02,349 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 90 transitions, 682 flow [2024-06-03 20:14:02,349 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:02,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:02,350 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:02,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:14:02,350 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:02,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:02,350 INFO L85 PathProgramCache]: Analyzing trace with hash -734247795, now seen corresponding path program 3 times [2024-06-03 20:14:02,351 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:02,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104235924] [2024-06-03 20:14:02,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:02,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:02,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:03,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:03,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:03,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104235924] [2024-06-03 20:14:03,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104235924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:03,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:03,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:03,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508485226] [2024-06-03 20:14:03,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:03,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:03,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:03,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:03,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:03,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 90 transitions, 682 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:03,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:03,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:03,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:03,458 INFO L124 PetriNetUnfolderBase]: 1392/2127 cut-off events. [2024-06-03 20:14:03,458 INFO L125 PetriNetUnfolderBase]: For 13319/13319 co-relation queries the response was YES. [2024-06-03 20:14:03,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9836 conditions, 2127 events. 1392/2127 cut-off events. For 13319/13319 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10284 event pairs, 523 based on Foata normal form. 4/2127 useless extension candidates. Maximal degree in co-relation 9794. Up to 1945 conditions per place. [2024-06-03 20:14:03,470 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 27 changer transitions 0/113 dead transitions. [2024-06-03 20:14:03,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 113 transitions, 969 flow [2024-06-03 20:14:03,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:03,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-03 20:14:03,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-03 20:14:03,472 INFO L175 Difference]: Start difference. First operand has 85 places, 90 transitions, 682 flow. Second operand 7 states and 136 transitions. [2024-06-03 20:14:03,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 113 transitions, 969 flow [2024-06-03 20:14:03,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 113 transitions, 887 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:03,484 INFO L231 Difference]: Finished difference. Result has 87 places, 91 transitions, 673 flow [2024-06-03 20:14:03,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=606, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=673, PETRI_PLACES=87, PETRI_TRANSITIONS=91} [2024-06-03 20:14:03,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-03 20:14:03,485 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 91 transitions, 673 flow [2024-06-03 20:14:03,485 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:03,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:03,485 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:03,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:14:03,486 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:03,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:03,486 INFO L85 PathProgramCache]: Analyzing trace with hash -734237875, now seen corresponding path program 1 times [2024-06-03 20:14:03,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:03,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446357090] [2024-06-03 20:14:03,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:03,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:03,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:04,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:04,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:04,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446357090] [2024-06-03 20:14:04,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446357090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:04,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:04,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:04,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794917603] [2024-06-03 20:14:04,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:04,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:04,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:04,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:04,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:04,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:04,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 91 transitions, 673 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:04,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:04,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:04,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:04,814 INFO L124 PetriNetUnfolderBase]: 1298/2035 cut-off events. [2024-06-03 20:14:04,815 INFO L125 PetriNetUnfolderBase]: For 14878/14878 co-relation queries the response was YES. [2024-06-03 20:14:04,820 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9416 conditions, 2035 events. 1298/2035 cut-off events. For 14878/14878 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 10105 event pairs, 476 based on Foata normal form. 4/2023 useless extension candidates. Maximal degree in co-relation 9374. Up to 1850 conditions per place. [2024-06-03 20:14:04,826 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 88 selfloop transitions, 16 changer transitions 0/117 dead transitions. [2024-06-03 20:14:04,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 117 transitions, 957 flow [2024-06-03 20:14:04,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:04,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:04,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 20:14:04,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 20:14:04,829 INFO L175 Difference]: Start difference. First operand has 87 places, 91 transitions, 673 flow. Second operand 8 states and 154 transitions. [2024-06-03 20:14:04,829 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 117 transitions, 957 flow [2024-06-03 20:14:04,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 117 transitions, 915 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:14:04,837 INFO L231 Difference]: Finished difference. Result has 91 places, 93 transitions, 690 flow [2024-06-03 20:14:04,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=91, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=690, PETRI_PLACES=91, PETRI_TRANSITIONS=93} [2024-06-03 20:14:04,838 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-03 20:14:04,838 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 93 transitions, 690 flow [2024-06-03 20:14:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:04,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:04,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:04,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:14:04,839 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:04,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:04,839 INFO L85 PathProgramCache]: Analyzing trace with hash 925242783, now seen corresponding path program 1 times [2024-06-03 20:14:04,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:04,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180675501] [2024-06-03 20:14:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:04,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:05,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:05,675 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:05,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180675501] [2024-06-03 20:14:05,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180675501] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:05,675 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:05,675 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:05,676 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35662497] [2024-06-03 20:14:05,676 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:05,676 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:05,676 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:05,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:05,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:05,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:05,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 93 transitions, 690 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:05,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:05,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:05,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:06,230 INFO L124 PetriNetUnfolderBase]: 1332/2061 cut-off events. [2024-06-03 20:14:06,231 INFO L125 PetriNetUnfolderBase]: For 17825/17865 co-relation queries the response was YES. [2024-06-03 20:14:06,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9890 conditions, 2061 events. 1332/2061 cut-off events. For 17825/17865 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10167 event pairs, 464 based on Foata normal form. 21/2033 useless extension candidates. Maximal degree in co-relation 9847. Up to 1897 conditions per place. [2024-06-03 20:14:06,243 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 86 selfloop transitions, 18 changer transitions 0/121 dead transitions. [2024-06-03 20:14:06,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 121 transitions, 992 flow [2024-06-03 20:14:06,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:06,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:06,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-03 20:14:06,245 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-03 20:14:06,245 INFO L175 Difference]: Start difference. First operand has 91 places, 93 transitions, 690 flow. Second operand 7 states and 142 transitions. [2024-06-03 20:14:06,245 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 121 transitions, 992 flow [2024-06-03 20:14:06,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 121 transitions, 951 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:06,256 INFO L231 Difference]: Finished difference. Result has 92 places, 96 transitions, 729 flow [2024-06-03 20:14:06,257 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=649, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=729, PETRI_PLACES=92, PETRI_TRANSITIONS=96} [2024-06-03 20:14:06,257 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 49 predicate places. [2024-06-03 20:14:06,257 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 96 transitions, 729 flow [2024-06-03 20:14:06,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:06,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:06,258 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:06,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:14:06,258 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:06,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:06,259 INFO L85 PathProgramCache]: Analyzing trace with hash 925427357, now seen corresponding path program 1 times [2024-06-03 20:14:06,259 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:06,259 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918368904] [2024-06-03 20:14:06,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:06,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:06,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:07,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:07,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:07,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918368904] [2024-06-03 20:14:07,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918368904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:07,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:07,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:07,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891816393] [2024-06-03 20:14:07,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:07,099 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:07,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:07,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:07,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:07,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:07,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 96 transitions, 729 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:07,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:07,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:07,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:07,658 INFO L124 PetriNetUnfolderBase]: 1387/2130 cut-off events. [2024-06-03 20:14:07,659 INFO L125 PetriNetUnfolderBase]: For 18839/18839 co-relation queries the response was YES. [2024-06-03 20:14:07,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10402 conditions, 2130 events. 1387/2130 cut-off events. For 18839/18839 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10335 event pairs, 484 based on Foata normal form. 2/2130 useless extension candidates. Maximal degree in co-relation 10358. Up to 2029 conditions per place. [2024-06-03 20:14:07,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 109 selfloop transitions, 17 changer transitions 0/131 dead transitions. [2024-06-03 20:14:07,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 131 transitions, 1099 flow [2024-06-03 20:14:07,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:07,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:07,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:14:07,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:14:07,673 INFO L175 Difference]: Start difference. First operand has 92 places, 96 transitions, 729 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:14:07,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 131 transitions, 1099 flow [2024-06-03 20:14:07,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 131 transitions, 1045 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:07,684 INFO L231 Difference]: Finished difference. Result has 97 places, 105 transitions, 791 flow [2024-06-03 20:14:07,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=675, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=791, PETRI_PLACES=97, PETRI_TRANSITIONS=105} [2024-06-03 20:14:07,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-03 20:14:07,685 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 105 transitions, 791 flow [2024-06-03 20:14:07,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:07,685 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:07,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:07,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:14:07,685 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:07,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:07,686 INFO L85 PathProgramCache]: Analyzing trace with hash -1258250595, now seen corresponding path program 2 times [2024-06-03 20:14:07,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:07,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445702868] [2024-06-03 20:14:07,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:07,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:07,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:08,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:08,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:08,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445702868] [2024-06-03 20:14:08,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445702868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:08,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:08,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:08,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918016309] [2024-06-03 20:14:08,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:08,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:08,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:08,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:08,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:08,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:08,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 105 transitions, 791 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:08,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:08,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:08,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:09,204 INFO L124 PetriNetUnfolderBase]: 1398/2151 cut-off events. [2024-06-03 20:14:09,204 INFO L125 PetriNetUnfolderBase]: For 21430/21430 co-relation queries the response was YES. [2024-06-03 20:14:09,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10924 conditions, 2151 events. 1398/2151 cut-off events. For 21430/21430 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10506 event pairs, 484 based on Foata normal form. 2/2149 useless extension candidates. Maximal degree in co-relation 10877. Up to 2000 conditions per place. [2024-06-03 20:14:09,218 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 28 changer transitions 0/139 dead transitions. [2024-06-03 20:14:09,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 139 transitions, 1191 flow [2024-06-03 20:14:09,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:09,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:09,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:14:09,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-03 20:14:09,220 INFO L175 Difference]: Start difference. First operand has 97 places, 105 transitions, 791 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:14:09,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 139 transitions, 1191 flow [2024-06-03 20:14:09,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 139 transitions, 1167 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:09,233 INFO L231 Difference]: Finished difference. Result has 104 places, 116 transitions, 934 flow [2024-06-03 20:14:09,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=767, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=934, PETRI_PLACES=104, PETRI_TRANSITIONS=116} [2024-06-03 20:14:09,234 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-03 20:14:09,234 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 116 transitions, 934 flow [2024-06-03 20:14:09,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:09,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:09,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:09,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:14:09,234 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:09,235 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:09,235 INFO L85 PathProgramCache]: Analyzing trace with hash -1286547767, now seen corresponding path program 3 times [2024-06-03 20:14:09,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:09,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779345389] [2024-06-03 20:14:09,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:09,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:09,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:10,098 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:10,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:10,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779345389] [2024-06-03 20:14:10,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779345389] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:10,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:10,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:10,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078491976] [2024-06-03 20:14:10,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:10,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:10,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:10,104 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:10,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:10,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:10,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 116 transitions, 934 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:10,170 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:10,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:10,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:10,753 INFO L124 PetriNetUnfolderBase]: 1420/2178 cut-off events. [2024-06-03 20:14:10,753 INFO L125 PetriNetUnfolderBase]: For 24932/24932 co-relation queries the response was YES. [2024-06-03 20:14:10,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11694 conditions, 2178 events. 1420/2178 cut-off events. For 24932/24932 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 10553 event pairs, 484 based on Foata normal form. 4/2178 useless extension candidates. Maximal degree in co-relation 11643. Up to 1920 conditions per place. [2024-06-03 20:14:10,780 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 53 changer transitions 0/153 dead transitions. [2024-06-03 20:14:10,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 1447 flow [2024-06-03 20:14:10,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:10,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:10,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 20:14:10,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 20:14:10,798 INFO L175 Difference]: Start difference. First operand has 104 places, 116 transitions, 934 flow. Second operand 9 states and 175 transitions. [2024-06-03 20:14:10,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 1447 flow [2024-06-03 20:14:10,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 153 transitions, 1399 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:10,831 INFO L231 Difference]: Finished difference. Result has 110 places, 123 transitions, 1091 flow [2024-06-03 20:14:10,832 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=890, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1091, PETRI_PLACES=110, PETRI_TRANSITIONS=123} [2024-06-03 20:14:10,832 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-03 20:14:10,833 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 123 transitions, 1091 flow [2024-06-03 20:14:10,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:10,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:10,833 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:10,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:14:10,833 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:10,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:10,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1894011676, now seen corresponding path program 1 times [2024-06-03 20:14:10,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:10,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023602574] [2024-06-03 20:14:10,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:10,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:10,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:12,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:12,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023602574] [2024-06-03 20:14:12,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023602574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:12,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:12,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:12,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335960691] [2024-06-03 20:14:12,183 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:12,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:12,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:12,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:12,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:12,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:12,259 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 123 transitions, 1091 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:12,259 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:12,259 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:12,259 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:12,807 INFO L124 PetriNetUnfolderBase]: 1478/2274 cut-off events. [2024-06-03 20:14:12,807 INFO L125 PetriNetUnfolderBase]: For 28764/28764 co-relation queries the response was YES. [2024-06-03 20:14:12,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12889 conditions, 2274 events. 1478/2274 cut-off events. For 28764/28764 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11053 event pairs, 473 based on Foata normal form. 2/2274 useless extension candidates. Maximal degree in co-relation 12836. Up to 2136 conditions per place. [2024-06-03 20:14:12,821 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 141 selfloop transitions, 27 changer transitions 0/173 dead transitions. [2024-06-03 20:14:12,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 173 transitions, 1698 flow [2024-06-03 20:14:12,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:12,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:12,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:14:12,823 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:14:12,823 INFO L175 Difference]: Start difference. First operand has 110 places, 123 transitions, 1091 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:14:12,823 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 173 transitions, 1698 flow [2024-06-03 20:14:12,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 173 transitions, 1610 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:12,846 INFO L231 Difference]: Finished difference. Result has 117 places, 143 transitions, 1296 flow [2024-06-03 20:14:12,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1007, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1296, PETRI_PLACES=117, PETRI_TRANSITIONS=143} [2024-06-03 20:14:12,846 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 74 predicate places. [2024-06-03 20:14:12,847 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 143 transitions, 1296 flow [2024-06-03 20:14:12,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:12,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:12,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:12,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:14:12,847 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:12,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:12,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1252703160, now seen corresponding path program 2 times [2024-06-03 20:14:12,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:12,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158325947] [2024-06-03 20:14:12,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:12,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:12,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:13,751 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:13,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:13,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158325947] [2024-06-03 20:14:13,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158325947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:13,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:13,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:13,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44414373] [2024-06-03 20:14:13,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:13,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:13,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:13,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:13,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:13,810 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:13,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 143 transitions, 1296 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:13,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:13,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:13,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:14,401 INFO L124 PetriNetUnfolderBase]: 1473/2277 cut-off events. [2024-06-03 20:14:14,402 INFO L125 PetriNetUnfolderBase]: For 32096/32096 co-relation queries the response was YES. [2024-06-03 20:14:14,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13364 conditions, 2277 events. 1473/2277 cut-off events. For 32096/32096 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11120 event pairs, 453 based on Foata normal form. 2/2277 useless extension candidates. Maximal degree in co-relation 13306. Up to 2106 conditions per place. [2024-06-03 20:14:14,416 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 141 selfloop transitions, 32 changer transitions 0/178 dead transitions. [2024-06-03 20:14:14,416 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 178 transitions, 1810 flow [2024-06-03 20:14:14,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:14,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:14,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 20:14:14,417 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 20:14:14,417 INFO L175 Difference]: Start difference. First operand has 117 places, 143 transitions, 1296 flow. Second operand 8 states and 153 transitions. [2024-06-03 20:14:14,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 178 transitions, 1810 flow [2024-06-03 20:14:14,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 178 transitions, 1730 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-03 20:14:14,440 INFO L231 Difference]: Finished difference. Result has 124 places, 149 transitions, 1385 flow [2024-06-03 20:14:14,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1216, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1385, PETRI_PLACES=124, PETRI_TRANSITIONS=149} [2024-06-03 20:14:14,440 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 81 predicate places. [2024-06-03 20:14:14,440 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 149 transitions, 1385 flow [2024-06-03 20:14:14,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:14,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:14,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:14,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:14:14,441 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:14,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:14,441 INFO L85 PathProgramCache]: Analyzing trace with hash 31027308, now seen corresponding path program 1 times [2024-06-03 20:14:14,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:14,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731853823] [2024-06-03 20:14:14,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:14,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:14,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:15,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:15,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:15,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731853823] [2024-06-03 20:14:15,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731853823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:15,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:15,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:15,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044658131] [2024-06-03 20:14:15,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:15,398 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:15,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 149 transitions, 1385 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:15,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:15,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:15,399 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:16,021 INFO L124 PetriNetUnfolderBase]: 1490/2304 cut-off events. [2024-06-03 20:14:16,021 INFO L125 PetriNetUnfolderBase]: For 36657/36657 co-relation queries the response was YES. [2024-06-03 20:14:16,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13990 conditions, 2304 events. 1490/2304 cut-off events. For 36657/36657 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 11283 event pairs, 449 based on Foata normal form. 4/2306 useless extension candidates. Maximal degree in co-relation 13929. Up to 2155 conditions per place. [2024-06-03 20:14:16,038 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 156 selfloop transitions, 22 changer transitions 0/183 dead transitions. [2024-06-03 20:14:16,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 183 transitions, 1871 flow [2024-06-03 20:14:16,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:16,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:16,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:14:16,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:14:16,049 INFO L175 Difference]: Start difference. First operand has 124 places, 149 transitions, 1385 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:14:16,049 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 183 transitions, 1871 flow [2024-06-03 20:14:16,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 183 transitions, 1792 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:16,078 INFO L231 Difference]: Finished difference. Result has 130 places, 151 transitions, 1389 flow [2024-06-03 20:14:16,078 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1306, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1389, PETRI_PLACES=130, PETRI_TRANSITIONS=151} [2024-06-03 20:14:16,078 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 87 predicate places. [2024-06-03 20:14:16,078 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 151 transitions, 1389 flow [2024-06-03 20:14:16,079 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:16,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:16,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:16,079 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:14:16,080 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:16,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:16,080 INFO L85 PathProgramCache]: Analyzing trace with hash -1493971634, now seen corresponding path program 2 times [2024-06-03 20:14:16,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:16,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579124185] [2024-06-03 20:14:16,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:16,080 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:16,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:16,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:16,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:16,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579124185] [2024-06-03 20:14:16,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579124185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:16,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:16,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:16,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749464846] [2024-06-03 20:14:16,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:16,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:16,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:16,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:16,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:17,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:17,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 151 transitions, 1389 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:17,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:17,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:17,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:17,483 INFO L124 PetriNetUnfolderBase]: 1507/2333 cut-off events. [2024-06-03 20:14:17,484 INFO L125 PetriNetUnfolderBase]: For 36540/36540 co-relation queries the response was YES. [2024-06-03 20:14:17,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14105 conditions, 2333 events. 1507/2333 cut-off events. For 36540/36540 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11491 event pairs, 461 based on Foata normal form. 4/2331 useless extension candidates. Maximal degree in co-relation 14042. Up to 2137 conditions per place. [2024-06-03 20:14:17,501 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 145 selfloop transitions, 33 changer transitions 0/183 dead transitions. [2024-06-03 20:14:17,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 183 transitions, 1873 flow [2024-06-03 20:14:17,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:17,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:17,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:14:17,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 20:14:17,503 INFO L175 Difference]: Start difference. First operand has 130 places, 151 transitions, 1389 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:14:17,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 183 transitions, 1873 flow [2024-06-03 20:14:17,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 183 transitions, 1806 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:17,527 INFO L231 Difference]: Finished difference. Result has 132 places, 153 transitions, 1431 flow [2024-06-03 20:14:17,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1431, PETRI_PLACES=132, PETRI_TRANSITIONS=153} [2024-06-03 20:14:17,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 89 predicate places. [2024-06-03 20:14:17,527 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 153 transitions, 1431 flow [2024-06-03 20:14:17,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:17,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:17,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:17,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:14:17,528 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:17,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:17,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1834801306, now seen corresponding path program 3 times [2024-06-03 20:14:17,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:17,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840333133] [2024-06-03 20:14:17,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:17,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:17,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:18,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:18,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840333133] [2024-06-03 20:14:18,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840333133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:18,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:18,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:18,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028667501] [2024-06-03 20:14:18,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:18,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:18,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:18,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:18,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:18,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:18,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 153 transitions, 1431 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:18,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:18,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:18,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:19,327 INFO L124 PetriNetUnfolderBase]: 1635/2540 cut-off events. [2024-06-03 20:14:19,327 INFO L125 PetriNetUnfolderBase]: For 45262/45262 co-relation queries the response was YES. [2024-06-03 20:14:19,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15870 conditions, 2540 events. 1635/2540 cut-off events. For 45262/45262 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12831 event pairs, 437 based on Foata normal form. 4/2539 useless extension candidates. Maximal degree in co-relation 15806. Up to 1960 conditions per place. [2024-06-03 20:14:19,345 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 127 selfloop transitions, 67 changer transitions 0/199 dead transitions. [2024-06-03 20:14:19,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 199 transitions, 2230 flow [2024-06-03 20:14:19,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:14:19,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:14:19,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 20:14:19,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-03 20:14:19,346 INFO L175 Difference]: Start difference. First operand has 132 places, 153 transitions, 1431 flow. Second operand 10 states and 192 transitions. [2024-06-03 20:14:19,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 199 transitions, 2230 flow [2024-06-03 20:14:19,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 199 transitions, 2135 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:19,378 INFO L231 Difference]: Finished difference. Result has 136 places, 160 transitions, 1590 flow [2024-06-03 20:14:19,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1340, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1590, PETRI_PLACES=136, PETRI_TRANSITIONS=160} [2024-06-03 20:14:19,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-03 20:14:19,379 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 160 transitions, 1590 flow [2024-06-03 20:14:19,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:19,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:19,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:19,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:14:19,380 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:19,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:19,380 INFO L85 PathProgramCache]: Analyzing trace with hash -94561512, now seen corresponding path program 4 times [2024-06-03 20:14:19,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:19,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33925055] [2024-06-03 20:14:19,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:19,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:19,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:20,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:20,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:20,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33925055] [2024-06-03 20:14:20,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33925055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:20,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:20,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:20,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021850039] [2024-06-03 20:14:20,249 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:20,250 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:20,250 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:20,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:20,250 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:20,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:20,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 160 transitions, 1590 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:20,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:20,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:20,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:20,869 INFO L124 PetriNetUnfolderBase]: 1663/2589 cut-off events. [2024-06-03 20:14:20,870 INFO L125 PetriNetUnfolderBase]: For 50434/50434 co-relation queries the response was YES. [2024-06-03 20:14:20,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16574 conditions, 2589 events. 1663/2589 cut-off events. For 50434/50434 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13020 event pairs, 470 based on Foata normal form. 4/2587 useless extension candidates. Maximal degree in co-relation 16508. Up to 2388 conditions per place. [2024-06-03 20:14:20,891 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 153 selfloop transitions, 36 changer transitions 0/194 dead transitions. [2024-06-03 20:14:20,891 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 194 transitions, 2120 flow [2024-06-03 20:14:20,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:20,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:20,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:14:20,892 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:14:20,892 INFO L175 Difference]: Start difference. First operand has 136 places, 160 transitions, 1590 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:14:20,893 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 194 transitions, 2120 flow [2024-06-03 20:14:20,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 194 transitions, 1958 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:20,937 INFO L231 Difference]: Finished difference. Result has 140 places, 166 transitions, 1587 flow [2024-06-03 20:14:20,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1442, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1587, PETRI_PLACES=140, PETRI_TRANSITIONS=166} [2024-06-03 20:14:20,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-03 20:14:20,938 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 166 transitions, 1587 flow [2024-06-03 20:14:20,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:20,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:20,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:20,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:14:20,938 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:20,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:20,939 INFO L85 PathProgramCache]: Analyzing trace with hash -1228274354, now seen corresponding path program 5 times [2024-06-03 20:14:20,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:20,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178882641] [2024-06-03 20:14:20,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:20,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:20,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:21,980 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:21,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:21,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178882641] [2024-06-03 20:14:21,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178882641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:21,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:21,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:21,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107460801] [2024-06-03 20:14:21,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:21,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:21,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:21,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:21,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:22,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:22,103 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 166 transitions, 1587 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:22,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:22,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:22,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:22,754 INFO L124 PetriNetUnfolderBase]: 1655/2572 cut-off events. [2024-06-03 20:14:22,754 INFO L125 PetriNetUnfolderBase]: For 51203/51203 co-relation queries the response was YES. [2024-06-03 20:14:22,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16207 conditions, 2572 events. 1655/2572 cut-off events. For 51203/51203 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 12911 event pairs, 475 based on Foata normal form. 4/2570 useless extension candidates. Maximal degree in co-relation 16139. Up to 2322 conditions per place. [2024-06-03 20:14:22,772 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 146 selfloop transitions, 50 changer transitions 0/201 dead transitions. [2024-06-03 20:14:22,773 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 201 transitions, 2115 flow [2024-06-03 20:14:22,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:14:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:14:22,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 185 transitions. [2024-06-03 20:14:22,774 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 20:14:22,774 INFO L175 Difference]: Start difference. First operand has 140 places, 166 transitions, 1587 flow. Second operand 10 states and 185 transitions. [2024-06-03 20:14:22,774 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 201 transitions, 2115 flow [2024-06-03 20:14:22,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 201 transitions, 2043 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 20:14:22,809 INFO L231 Difference]: Finished difference. Result has 147 places, 169 transitions, 1677 flow [2024-06-03 20:14:22,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1515, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1677, PETRI_PLACES=147, PETRI_TRANSITIONS=169} [2024-06-03 20:14:22,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 104 predicate places. [2024-06-03 20:14:22,810 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 169 transitions, 1677 flow [2024-06-03 20:14:22,810 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:22,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:22,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:22,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:14:22,810 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:22,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:22,836 INFO L85 PathProgramCache]: Analyzing trace with hash 2073756864, now seen corresponding path program 1 times [2024-06-03 20:14:22,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:22,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114322672] [2024-06-03 20:14:22,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:22,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:22,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:23,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:23,653 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:23,653 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114322672] [2024-06-03 20:14:23,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114322672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:23,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:23,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:23,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737687006] [2024-06-03 20:14:23,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:23,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:23,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:23,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:23,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:23,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:23,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 169 transitions, 1677 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:23,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:23,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:23,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:24,297 INFO L124 PetriNetUnfolderBase]: 1599/2522 cut-off events. [2024-06-03 20:14:24,298 INFO L125 PetriNetUnfolderBase]: For 55833/55861 co-relation queries the response was YES. [2024-06-03 20:14:24,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16155 conditions, 2522 events. 1599/2522 cut-off events. For 55833/55861 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13023 event pairs, 375 based on Foata normal form. 10/2502 useless extension candidates. Maximal degree in co-relation 16085. Up to 2187 conditions per place. [2024-06-03 20:14:24,316 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 130 selfloop transitions, 28 changer transitions 0/200 dead transitions. [2024-06-03 20:14:24,316 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 200 transitions, 2103 flow [2024-06-03 20:14:24,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:24,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:24,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 20:14:24,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:14:24,318 INFO L175 Difference]: Start difference. First operand has 147 places, 169 transitions, 1677 flow. Second operand 8 states and 160 transitions. [2024-06-03 20:14:24,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 200 transitions, 2103 flow [2024-06-03 20:14:24,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 200 transitions, 1985 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:24,362 INFO L231 Difference]: Finished difference. Result has 148 places, 171 transitions, 1648 flow [2024-06-03 20:14:24,363 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1648, PETRI_PLACES=148, PETRI_TRANSITIONS=171} [2024-06-03 20:14:24,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-03 20:14:24,363 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 171 transitions, 1648 flow [2024-06-03 20:14:24,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:24,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:24,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:24,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:14:24,364 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:24,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:24,364 INFO L85 PathProgramCache]: Analyzing trace with hash 270803996, now seen corresponding path program 2 times [2024-06-03 20:14:24,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:24,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108084215] [2024-06-03 20:14:24,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:24,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:24,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:25,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:25,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:25,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108084215] [2024-06-03 20:14:25,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108084215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:25,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:25,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:25,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [785591751] [2024-06-03 20:14:25,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:25,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:25,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:25,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:25,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:25,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:25,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 171 transitions, 1648 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:25,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:25,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:25,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:26,008 INFO L124 PetriNetUnfolderBase]: 1625/2562 cut-off events. [2024-06-03 20:14:26,009 INFO L125 PetriNetUnfolderBase]: For 57893/57908 co-relation queries the response was YES. [2024-06-03 20:14:26,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16429 conditions, 2562 events. 1625/2562 cut-off events. For 57893/57908 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13263 event pairs, 450 based on Foata normal form. 8/2528 useless extension candidates. Maximal degree in co-relation 16358. Up to 2282 conditions per place. [2024-06-03 20:14:26,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 27 changer transitions 0/202 dead transitions. [2024-06-03 20:14:26,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 202 transitions, 2102 flow [2024-06-03 20:14:26,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:26,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:26,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 20:14:26,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 20:14:26,028 INFO L175 Difference]: Start difference. First operand has 148 places, 171 transitions, 1648 flow. Second operand 8 states and 157 transitions. [2024-06-03 20:14:26,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 202 transitions, 2102 flow [2024-06-03 20:14:26,064 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 202 transitions, 2031 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:26,066 INFO L231 Difference]: Finished difference. Result has 151 places, 176 transitions, 1707 flow [2024-06-03 20:14:26,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1577, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1707, PETRI_PLACES=151, PETRI_TRANSITIONS=176} [2024-06-03 20:14:26,067 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-03 20:14:26,067 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 176 transitions, 1707 flow [2024-06-03 20:14:26,067 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:26,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:26,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:26,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:14:26,067 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:26,068 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:26,068 INFO L85 PathProgramCache]: Analyzing trace with hash -12922818, now seen corresponding path program 3 times [2024-06-03 20:14:26,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:26,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300957214] [2024-06-03 20:14:26,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:26,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:26,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:26,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:26,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:26,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300957214] [2024-06-03 20:14:26,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300957214] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:26,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:26,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:26,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243134917] [2024-06-03 20:14:26,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:26,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:26,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:26,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:26,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:27,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:27,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 176 transitions, 1707 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:27,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:27,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:27,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:27,620 INFO L124 PetriNetUnfolderBase]: 1640/2594 cut-off events. [2024-06-03 20:14:27,620 INFO L125 PetriNetUnfolderBase]: For 63295/63310 co-relation queries the response was YES. [2024-06-03 20:14:27,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16971 conditions, 2594 events. 1640/2594 cut-off events. For 63295/63310 co-relation queries the response was YES. Maximal size of possible extension queue 124. Compared 13491 event pairs, 444 based on Foata normal form. 8/2558 useless extension candidates. Maximal degree in co-relation 16898. Up to 2273 conditions per place. [2024-06-03 20:14:27,641 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 131 selfloop transitions, 33 changer transitions 0/206 dead transitions. [2024-06-03 20:14:27,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 206 transitions, 2151 flow [2024-06-03 20:14:27,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:27,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:27,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 20:14:27,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:14:27,642 INFO L175 Difference]: Start difference. First operand has 151 places, 176 transitions, 1707 flow. Second operand 8 states and 160 transitions. [2024-06-03 20:14:27,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 206 transitions, 2151 flow [2024-06-03 20:14:27,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 206 transitions, 2075 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:27,692 INFO L231 Difference]: Finished difference. Result has 154 places, 178 transitions, 1740 flow [2024-06-03 20:14:27,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1740, PETRI_PLACES=154, PETRI_TRANSITIONS=178} [2024-06-03 20:14:27,692 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-03 20:14:27,692 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 178 transitions, 1740 flow [2024-06-03 20:14:27,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:27,694 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:27,694 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:27,694 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:14:27,694 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:27,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:27,695 INFO L85 PathProgramCache]: Analyzing trace with hash 277238046, now seen corresponding path program 1 times [2024-06-03 20:14:27,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:27,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063572990] [2024-06-03 20:14:27,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:27,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:27,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:28,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:28,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:28,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063572990] [2024-06-03 20:14:28,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063572990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:28,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:28,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:28,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [613946219] [2024-06-03 20:14:28,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:28,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:28,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:28,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:28,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:28,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:28,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 178 transitions, 1740 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:28,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:28,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:28,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:29,510 INFO L124 PetriNetUnfolderBase]: 1752/2731 cut-off events. [2024-06-03 20:14:29,510 INFO L125 PetriNetUnfolderBase]: For 64734/64734 co-relation queries the response was YES. [2024-06-03 20:14:29,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18049 conditions, 2731 events. 1752/2731 cut-off events. For 64734/64734 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 13928 event pairs, 467 based on Foata normal form. 2/2731 useless extension candidates. Maximal degree in co-relation 17975. Up to 2561 conditions per place. [2024-06-03 20:14:29,532 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 179 selfloop transitions, 29 changer transitions 0/213 dead transitions. [2024-06-03 20:14:29,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 213 transitions, 2309 flow [2024-06-03 20:14:29,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:29,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:29,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:14:29,533 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:14:29,534 INFO L175 Difference]: Start difference. First operand has 154 places, 178 transitions, 1740 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:14:29,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 213 transitions, 2309 flow [2024-06-03 20:14:29,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 213 transitions, 2222 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:29,587 INFO L231 Difference]: Finished difference. Result has 157 places, 184 transitions, 1788 flow [2024-06-03 20:14:29,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1653, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=178, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1788, PETRI_PLACES=157, PETRI_TRANSITIONS=184} [2024-06-03 20:14:29,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-03 20:14:29,587 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 184 transitions, 1788 flow [2024-06-03 20:14:29,588 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:29,588 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:29,588 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:29,588 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:14:29,588 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:29,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:29,589 INFO L85 PathProgramCache]: Analyzing trace with hash 270808956, now seen corresponding path program 2 times [2024-06-03 20:14:29,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:29,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052132306] [2024-06-03 20:14:29,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:29,589 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:29,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:30,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:30,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:30,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052132306] [2024-06-03 20:14:30,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052132306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:30,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:30,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:30,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211463067] [2024-06-03 20:14:30,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:30,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:30,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:30,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:30,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:30,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:30,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 184 transitions, 1788 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:30,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:30,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:30,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:31,493 INFO L124 PetriNetUnfolderBase]: 1763/2747 cut-off events. [2024-06-03 20:14:31,493 INFO L125 PetriNetUnfolderBase]: For 69129/69129 co-relation queries the response was YES. [2024-06-03 20:14:31,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18261 conditions, 2747 events. 1763/2747 cut-off events. For 69129/69129 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 14021 event pairs, 456 based on Foata normal form. 2/2747 useless extension candidates. Maximal degree in co-relation 18186. Up to 2577 conditions per place. [2024-06-03 20:14:31,517 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 182 selfloop transitions, 29 changer transitions 0/216 dead transitions. [2024-06-03 20:14:31,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 216 transitions, 2345 flow [2024-06-03 20:14:31,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:31,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:31,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:14:31,519 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:14:31,519 INFO L175 Difference]: Start difference. First operand has 157 places, 184 transitions, 1788 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:14:31,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 216 transitions, 2345 flow [2024-06-03 20:14:31,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 216 transitions, 2265 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:31,575 INFO L231 Difference]: Finished difference. Result has 160 places, 187 transitions, 1825 flow [2024-06-03 20:14:31,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1708, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1825, PETRI_PLACES=160, PETRI_TRANSITIONS=187} [2024-06-03 20:14:31,575 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-03 20:14:31,576 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 187 transitions, 1825 flow [2024-06-03 20:14:31,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:31,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:31,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:31,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:14:31,576 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:31,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:31,576 INFO L85 PathProgramCache]: Analyzing trace with hash 277475196, now seen corresponding path program 3 times [2024-06-03 20:14:31,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:31,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466788358] [2024-06-03 20:14:31,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:31,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:31,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:32,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:32,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:32,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466788358] [2024-06-03 20:14:32,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466788358] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:32,501 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:32,501 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:32,501 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849906748] [2024-06-03 20:14:32,501 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:32,501 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:32,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:32,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:32,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:32,586 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:32,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 187 transitions, 1825 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:32,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:32,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:32,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:33,143 INFO L124 PetriNetUnfolderBase]: 1790/2792 cut-off events. [2024-06-03 20:14:33,143 INFO L125 PetriNetUnfolderBase]: For 75187/75187 co-relation queries the response was YES. [2024-06-03 20:14:33,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18774 conditions, 2792 events. 1790/2792 cut-off events. For 75187/75187 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14318 event pairs, 438 based on Foata normal form. 2/2792 useless extension candidates. Maximal degree in co-relation 18698. Up to 2501 conditions per place. [2024-06-03 20:14:33,165 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 160 selfloop transitions, 58 changer transitions 0/223 dead transitions. [2024-06-03 20:14:33,165 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 223 transitions, 2557 flow [2024-06-03 20:14:33,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:33,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:14:33,183 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-03 20:14:33,183 INFO L175 Difference]: Start difference. First operand has 160 places, 187 transitions, 1825 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:14:33,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 223 transitions, 2557 flow [2024-06-03 20:14:33,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 223 transitions, 2460 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-03 20:14:33,239 INFO L231 Difference]: Finished difference. Result has 161 places, 193 transitions, 1962 flow [2024-06-03 20:14:33,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1728, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1962, PETRI_PLACES=161, PETRI_TRANSITIONS=193} [2024-06-03 20:14:33,239 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-03 20:14:33,240 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 193 transitions, 1962 flow [2024-06-03 20:14:33,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:33,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:33,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:33,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:14:33,240 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:33,240 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:33,241 INFO L85 PathProgramCache]: Analyzing trace with hash -10121348, now seen corresponding path program 4 times [2024-06-03 20:14:33,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:33,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531474494] [2024-06-03 20:14:33,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:33,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:33,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:34,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:34,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:34,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531474494] [2024-06-03 20:14:34,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531474494] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:34,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:34,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:34,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798755676] [2024-06-03 20:14:34,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:34,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:34,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:34,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:34,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:34,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:34,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 193 transitions, 1962 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:34,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:34,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:34,234 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:34,837 INFO L124 PetriNetUnfolderBase]: 1785/2787 cut-off events. [2024-06-03 20:14:34,837 INFO L125 PetriNetUnfolderBase]: For 80823/80823 co-relation queries the response was YES. [2024-06-03 20:14:34,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19187 conditions, 2787 events. 1785/2787 cut-off events. For 80823/80823 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14272 event pairs, 447 based on Foata normal form. 2/2787 useless extension candidates. Maximal degree in co-relation 19112. Up to 2582 conditions per place. [2024-06-03 20:14:34,858 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 183 selfloop transitions, 36 changer transitions 0/224 dead transitions. [2024-06-03 20:14:34,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 224 transitions, 2496 flow [2024-06-03 20:14:34,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:34,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:34,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:14:34,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:14:34,860 INFO L175 Difference]: Start difference. First operand has 161 places, 193 transitions, 1962 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:14:34,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 224 transitions, 2496 flow [2024-06-03 20:14:34,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 224 transitions, 2337 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:34,927 INFO L231 Difference]: Finished difference. Result has 164 places, 193 transitions, 1884 flow [2024-06-03 20:14:34,928 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1803, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1884, PETRI_PLACES=164, PETRI_TRANSITIONS=193} [2024-06-03 20:14:34,928 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-03 20:14:34,928 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 193 transitions, 1884 flow [2024-06-03 20:14:34,929 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:34,929 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:34,929 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:34,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:14:34,929 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:34,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:34,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1871732352, now seen corresponding path program 1 times [2024-06-03 20:14:34,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:34,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125142129] [2024-06-03 20:14:34,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:34,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:34,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:35,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:35,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:35,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125142129] [2024-06-03 20:14:35,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125142129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:35,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:35,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:35,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480407263] [2024-06-03 20:14:35,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:35,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:35,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:35,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:35,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:35,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:35,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 193 transitions, 1884 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:35,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:35,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:35,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:36,345 INFO L124 PetriNetUnfolderBase]: 1815/2835 cut-off events. [2024-06-03 20:14:36,345 INFO L125 PetriNetUnfolderBase]: For 86076/86076 co-relation queries the response was YES. [2024-06-03 20:14:36,357 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19429 conditions, 2835 events. 1815/2835 cut-off events. For 86076/86076 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14579 event pairs, 414 based on Foata normal form. 4/2837 useless extension candidates. Maximal degree in co-relation 19353. Up to 2606 conditions per place. [2024-06-03 20:14:36,367 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 181 selfloop transitions, 38 changer transitions 0/224 dead transitions. [2024-06-03 20:14:36,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 224 transitions, 2575 flow [2024-06-03 20:14:36,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:36,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:36,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 20:14:36,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-03 20:14:36,368 INFO L175 Difference]: Start difference. First operand has 164 places, 193 transitions, 1884 flow. Second operand 7 states and 137 transitions. [2024-06-03 20:14:36,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 224 transitions, 2575 flow [2024-06-03 20:14:36,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 224 transitions, 2479 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:14:36,425 INFO L231 Difference]: Finished difference. Result has 164 places, 204 transitions, 2002 flow [2024-06-03 20:14:36,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1788, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2002, PETRI_PLACES=164, PETRI_TRANSITIONS=204} [2024-06-03 20:14:36,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 121 predicate places. [2024-06-03 20:14:36,425 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 204 transitions, 2002 flow [2024-06-03 20:14:36,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:36,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:36,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:36,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:14:36,426 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:36,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:36,426 INFO L85 PathProgramCache]: Analyzing trace with hash 924840264, now seen corresponding path program 4 times [2024-06-03 20:14:36,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:36,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331592466] [2024-06-03 20:14:36,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:36,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:37,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:37,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:37,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331592466] [2024-06-03 20:14:37,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331592466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:37,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:37,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:14:37,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374229498] [2024-06-03 20:14:37,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:37,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:14:37,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:37,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:14:37,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:14:37,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:37,373 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 2002 flow. Second operand has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:37,373 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:37,373 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:37,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:37,923 INFO L124 PetriNetUnfolderBase]: 1720/2722 cut-off events. [2024-06-03 20:14:37,923 INFO L125 PetriNetUnfolderBase]: For 94179/94216 co-relation queries the response was YES. [2024-06-03 20:14:37,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19102 conditions, 2722 events. 1720/2722 cut-off events. For 94179/94216 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 14308 event pairs, 408 based on Foata normal form. 8/2689 useless extension candidates. Maximal degree in co-relation 19024. Up to 2376 conditions per place. [2024-06-03 20:14:37,945 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 146 selfloop transitions, 40 changer transitions 0/233 dead transitions. [2024-06-03 20:14:37,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 233 transitions, 2508 flow [2024-06-03 20:14:37,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:14:37,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:14:37,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 20:14:37,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 20:14:37,946 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 2002 flow. Second operand 8 states and 157 transitions. [2024-06-03 20:14:37,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 233 transitions, 2508 flow [2024-06-03 20:14:38,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 233 transitions, 2464 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 20:14:38,020 INFO L231 Difference]: Finished difference. Result has 171 places, 209 transitions, 2119 flow [2024-06-03 20:14:38,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1958, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2119, PETRI_PLACES=171, PETRI_TRANSITIONS=209} [2024-06-03 20:14:38,020 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 128 predicate places. [2024-06-03 20:14:38,020 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 209 transitions, 2119 flow [2024-06-03 20:14:38,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.444444444444445) internal successors, (112), 9 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:38,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:38,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:38,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:14:38,021 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:38,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:38,021 INFO L85 PathProgramCache]: Analyzing trace with hash 931511464, now seen corresponding path program 5 times [2024-06-03 20:14:38,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:38,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297715534] [2024-06-03 20:14:38,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:38,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:38,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:38,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:38,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:38,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297715534] [2024-06-03 20:14:38,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297715534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:38,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:38,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:38,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83076201] [2024-06-03 20:14:38,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:38,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:38,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:38,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:38,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:38,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:38,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 209 transitions, 2119 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:38,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:38,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:38,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:39,637 INFO L124 PetriNetUnfolderBase]: 1813/2828 cut-off events. [2024-06-03 20:14:39,637 INFO L125 PetriNetUnfolderBase]: For 95518/95518 co-relation queries the response was YES. [2024-06-03 20:14:39,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20143 conditions, 2828 events. 1813/2828 cut-off events. For 95518/95518 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14560 event pairs, 445 based on Foata normal form. 2/2819 useless extension candidates. Maximal degree in co-relation 20062. Up to 2479 conditions per place. [2024-06-03 20:14:39,662 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 67 changer transitions 0/240 dead transitions. [2024-06-03 20:14:39,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 240 transitions, 2847 flow [2024-06-03 20:14:39,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:39,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:39,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 20:14:39,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 20:14:39,663 INFO L175 Difference]: Start difference. First operand has 171 places, 209 transitions, 2119 flow. Second operand 9 states and 175 transitions. [2024-06-03 20:14:39,664 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 240 transitions, 2847 flow [2024-06-03 20:14:39,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 240 transitions, 2735 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:39,738 INFO L231 Difference]: Finished difference. Result has 175 places, 212 transitions, 2213 flow [2024-06-03 20:14:39,738 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2213, PETRI_PLACES=175, PETRI_TRANSITIONS=212} [2024-06-03 20:14:39,739 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-03 20:14:39,739 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 212 transitions, 2213 flow [2024-06-03 20:14:39,739 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:39,739 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:39,739 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:39,739 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:14:39,740 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:39,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:39,740 INFO L85 PathProgramCache]: Analyzing trace with hash 2001733918, now seen corresponding path program 6 times [2024-06-03 20:14:39,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:39,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607208134] [2024-06-03 20:14:39,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:39,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:39,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:40,882 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:40,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607208134] [2024-06-03 20:14:40,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [607208134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:40,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:40,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:40,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058785689] [2024-06-03 20:14:40,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:40,883 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:40,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:40,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:40,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:41,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:41,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 212 transitions, 2213 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:41,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:41,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:41,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:41,723 INFO L124 PetriNetUnfolderBase]: 1835/2872 cut-off events. [2024-06-03 20:14:41,723 INFO L125 PetriNetUnfolderBase]: For 101967/101967 co-relation queries the response was YES. [2024-06-03 20:14:41,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20860 conditions, 2872 events. 1835/2872 cut-off events. For 101967/101967 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14842 event pairs, 394 based on Foata normal form. 2/2868 useless extension candidates. Maximal degree in co-relation 20778. Up to 2599 conditions per place. [2024-06-03 20:14:41,747 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 191 selfloop transitions, 49 changer transitions 0/245 dead transitions. [2024-06-03 20:14:41,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 245 transitions, 2864 flow [2024-06-03 20:14:41,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:41,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:41,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:14:41,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:14:41,748 INFO L175 Difference]: Start difference. First operand has 175 places, 212 transitions, 2213 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:14:41,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 245 transitions, 2864 flow [2024-06-03 20:14:41,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 2654 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:41,818 INFO L231 Difference]: Finished difference. Result has 177 places, 218 transitions, 2202 flow [2024-06-03 20:14:41,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2015, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2202, PETRI_PLACES=177, PETRI_TRANSITIONS=218} [2024-06-03 20:14:41,819 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 134 predicate places. [2024-06-03 20:14:41,819 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 218 transitions, 2202 flow [2024-06-03 20:14:41,819 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:41,819 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:41,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:41,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:14:41,819 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:41,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:41,820 INFO L85 PathProgramCache]: Analyzing trace with hash 924845224, now seen corresponding path program 7 times [2024-06-03 20:14:41,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:41,820 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385544129] [2024-06-03 20:14:41,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:41,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:41,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:42,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:42,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:42,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385544129] [2024-06-03 20:14:42,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385544129] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:42,870 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:42,870 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:42,870 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318245241] [2024-06-03 20:14:42,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:42,871 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:42,871 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:42,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:42,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:42,959 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:42,960 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 218 transitions, 2202 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:42,960 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:42,960 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:42,960 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:43,600 INFO L124 PetriNetUnfolderBase]: 1830/2865 cut-off events. [2024-06-03 20:14:43,600 INFO L125 PetriNetUnfolderBase]: For 105670/105670 co-relation queries the response was YES. [2024-06-03 20:14:43,616 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20736 conditions, 2865 events. 1830/2865 cut-off events. For 105670/105670 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 14841 event pairs, 445 based on Foata normal form. 2/2861 useless extension candidates. Maximal degree in co-relation 20653. Up to 2592 conditions per place. [2024-06-03 20:14:43,695 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 190 selfloop transitions, 50 changer transitions 0/245 dead transitions. [2024-06-03 20:14:43,695 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 245 transitions, 2766 flow [2024-06-03 20:14:43,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:43,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:43,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:14:43,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:14:43,697 INFO L175 Difference]: Start difference. First operand has 177 places, 218 transitions, 2202 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:14:43,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 245 transitions, 2766 flow [2024-06-03 20:14:43,767 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 245 transitions, 2602 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:14:43,770 INFO L231 Difference]: Finished difference. Result has 180 places, 218 transitions, 2146 flow [2024-06-03 20:14:43,771 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2038, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2146, PETRI_PLACES=180, PETRI_TRANSITIONS=218} [2024-06-03 20:14:43,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 20:14:43,771 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 218 transitions, 2146 flow [2024-06-03 20:14:43,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:43,771 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:43,771 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:43,771 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:14:43,772 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:43,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:43,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1153156504, now seen corresponding path program 8 times [2024-06-03 20:14:43,774 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:43,774 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397840775] [2024-06-03 20:14:43,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:43,774 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:43,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:44,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:44,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397840775] [2024-06-03 20:14:44,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397840775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:44,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:44,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:44,671 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403614223] [2024-06-03 20:14:44,671 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:44,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:44,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:44,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:44,672 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:44,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:44,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 218 transitions, 2146 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:44,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:44,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:44,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:45,402 INFO L124 PetriNetUnfolderBase]: 1841/2882 cut-off events. [2024-06-03 20:14:45,402 INFO L125 PetriNetUnfolderBase]: For 111389/111389 co-relation queries the response was YES. [2024-06-03 20:14:45,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20944 conditions, 2882 events. 1841/2882 cut-off events. For 111389/111389 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 14943 event pairs, 445 based on Foata normal form. 2/2873 useless extension candidates. Maximal degree in co-relation 20860. Up to 2518 conditions per place. [2024-06-03 20:14:45,428 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 168 selfloop transitions, 74 changer transitions 0/247 dead transitions. [2024-06-03 20:14:45,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 247 transitions, 2772 flow [2024-06-03 20:14:45,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:45,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:45,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:14:45,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 20:14:45,430 INFO L175 Difference]: Start difference. First operand has 180 places, 218 transitions, 2146 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:14:45,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 247 transitions, 2772 flow [2024-06-03 20:14:45,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 247 transitions, 2638 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 20:14:45,508 INFO L231 Difference]: Finished difference. Result has 180 places, 221 transitions, 2238 flow [2024-06-03 20:14:45,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2012, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=180, PETRI_TRANSITIONS=221} [2024-06-03 20:14:45,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 20:14:45,509 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 221 transitions, 2238 flow [2024-06-03 20:14:45,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:45,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:45,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:45,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:14:45,509 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:45,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:45,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1648652156, now seen corresponding path program 9 times [2024-06-03 20:14:45,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:45,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765236591] [2024-06-03 20:14:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:45,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:45,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:46,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:46,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:46,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765236591] [2024-06-03 20:14:46,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765236591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:46,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:46,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:46,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1874847326] [2024-06-03 20:14:46,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:46,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:46,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:46,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:46,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:46,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:46,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 221 transitions, 2238 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:46,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:46,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:46,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:47,568 INFO L124 PetriNetUnfolderBase]: 1836/2879 cut-off events. [2024-06-03 20:14:47,568 INFO L125 PetriNetUnfolderBase]: For 118939/118939 co-relation queries the response was YES. [2024-06-03 20:14:47,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21305 conditions, 2879 events. 1836/2879 cut-off events. For 118939/118939 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 15001 event pairs, 436 based on Foata normal form. 2/2875 useless extension candidates. Maximal degree in co-relation 21222. Up to 2484 conditions per place. [2024-06-03 20:14:47,590 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 166 selfloop transitions, 88 changer transitions 0/259 dead transitions. [2024-06-03 20:14:47,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 259 transitions, 2924 flow [2024-06-03 20:14:47,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:14:47,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:14:47,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 206 transitions. [2024-06-03 20:14:47,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4458874458874459 [2024-06-03 20:14:47,592 INFO L175 Difference]: Start difference. First operand has 180 places, 221 transitions, 2238 flow. Second operand 11 states and 206 transitions. [2024-06-03 20:14:47,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 259 transitions, 2924 flow [2024-06-03 20:14:47,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 259 transitions, 2718 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:14:47,685 INFO L231 Difference]: Finished difference. Result has 184 places, 224 transitions, 2296 flow [2024-06-03 20:14:47,685 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2032, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=2296, PETRI_PLACES=184, PETRI_TRANSITIONS=224} [2024-06-03 20:14:47,686 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 20:14:47,686 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 224 transitions, 2296 flow [2024-06-03 20:14:47,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:47,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:47,686 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:47,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:14:47,686 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:47,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:47,687 INFO L85 PathProgramCache]: Analyzing trace with hash -1699948418, now seen corresponding path program 2 times [2024-06-03 20:14:47,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:47,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622738619] [2024-06-03 20:14:47,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:47,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:48,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:48,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:48,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622738619] [2024-06-03 20:14:48,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1622738619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:48,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:48,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:48,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950704811] [2024-06-03 20:14:48,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:48,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:48,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:48,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:48,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:48,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:48,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 224 transitions, 2296 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:48,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:48,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:48,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:49,015 INFO L124 PetriNetUnfolderBase]: 1856/2908 cut-off events. [2024-06-03 20:14:49,015 INFO L125 PetriNetUnfolderBase]: For 127694/127694 co-relation queries the response was YES. [2024-06-03 20:14:49,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21882 conditions, 2908 events. 1856/2908 cut-off events. For 127694/127694 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15175 event pairs, 439 based on Foata normal form. 4/2910 useless extension candidates. Maximal degree in co-relation 21798. Up to 2693 conditions per place. [2024-06-03 20:14:49,041 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 204 selfloop transitions, 32 changer transitions 0/241 dead transitions. [2024-06-03 20:14:49,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 241 transitions, 2864 flow [2024-06-03 20:14:49,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:14:49,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:14:49,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-06-03 20:14:49,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:14:49,043 INFO L175 Difference]: Start difference. First operand has 184 places, 224 transitions, 2296 flow. Second operand 5 states and 105 transitions. [2024-06-03 20:14:49,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 241 transitions, 2864 flow [2024-06-03 20:14:49,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 241 transitions, 2626 flow, removed 34 selfloop flow, removed 9 redundant places. [2024-06-03 20:14:49,142 INFO L231 Difference]: Finished difference. Result has 180 places, 227 transitions, 2195 flow [2024-06-03 20:14:49,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2058, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2195, PETRI_PLACES=180, PETRI_TRANSITIONS=227} [2024-06-03 20:14:49,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 20:14:49,143 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 227 transitions, 2195 flow [2024-06-03 20:14:49,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:49,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:49,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:49,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:14:49,143 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:49,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:49,144 INFO L85 PathProgramCache]: Analyzing trace with hash 412428716, now seen corresponding path program 3 times [2024-06-03 20:14:49,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:49,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837579299] [2024-06-03 20:14:49,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:49,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:49,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:49,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:49,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:49,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837579299] [2024-06-03 20:14:49,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837579299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:49,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:49,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:49,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918787732] [2024-06-03 20:14:49,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:49,790 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:49,790 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:49,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:49,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:49,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:49,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 227 transitions, 2195 flow. Second operand has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:49,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:49,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:49,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:50,502 INFO L124 PetriNetUnfolderBase]: 1844/2892 cut-off events. [2024-06-03 20:14:50,502 INFO L125 PetriNetUnfolderBase]: For 121936/121936 co-relation queries the response was YES. [2024-06-03 20:14:50,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21144 conditions, 2892 events. 1844/2892 cut-off events. For 121936/121936 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15037 event pairs, 446 based on Foata normal form. 4/2894 useless extension candidates. Maximal degree in co-relation 21059. Up to 2645 conditions per place. [2024-06-03 20:14:50,528 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 201 selfloop transitions, 38 changer transitions 0/244 dead transitions. [2024-06-03 20:14:50,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 244 transitions, 2751 flow [2024-06-03 20:14:50,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:14:50,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:14:50,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 121 transitions. [2024-06-03 20:14:50,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4801587301587302 [2024-06-03 20:14:50,577 INFO L175 Difference]: Start difference. First operand has 180 places, 227 transitions, 2195 flow. Second operand 6 states and 121 transitions. [2024-06-03 20:14:50,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 244 transitions, 2751 flow [2024-06-03 20:14:50,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 244 transitions, 2676 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:50,658 INFO L231 Difference]: Finished difference. Result has 183 places, 227 transitions, 2208 flow [2024-06-03 20:14:50,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2120, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2208, PETRI_PLACES=183, PETRI_TRANSITIONS=227} [2024-06-03 20:14:50,660 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 140 predicate places. [2024-06-03 20:14:50,660 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 227 transitions, 2208 flow [2024-06-03 20:14:50,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.875) internal successors, (95), 8 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:50,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:50,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:50,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:14:50,661 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:50,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:50,661 INFO L85 PathProgramCache]: Analyzing trace with hash 191714854, now seen corresponding path program 1 times [2024-06-03 20:14:50,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:50,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660600485] [2024-06-03 20:14:50,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:50,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:50,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:51,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:51,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:51,375 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660600485] [2024-06-03 20:14:51,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660600485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:51,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:51,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:51,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732116135] [2024-06-03 20:14:51,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:51,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:51,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:51,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:51,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:51,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:51,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 227 transitions, 2208 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:51,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:51,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:51,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:51,910 INFO L124 PetriNetUnfolderBase]: 1768/2827 cut-off events. [2024-06-03 20:14:51,910 INFO L125 PetriNetUnfolderBase]: For 127523/127525 co-relation queries the response was YES. [2024-06-03 20:14:51,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21041 conditions, 2827 events. 1768/2827 cut-off events. For 127523/127525 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15105 event pairs, 516 based on Foata normal form. 3/2818 useless extension candidates. Maximal degree in co-relation 20955. Up to 2554 conditions per place. [2024-06-03 20:14:51,936 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 205 selfloop transitions, 25 changer transitions 0/252 dead transitions. [2024-06-03 20:14:51,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 252 transitions, 2858 flow [2024-06-03 20:14:51,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:51,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:51,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 20:14:51,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-03 20:14:51,937 INFO L175 Difference]: Start difference. First operand has 183 places, 227 transitions, 2208 flow. Second operand 7 states and 139 transitions. [2024-06-03 20:14:51,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 252 transitions, 2858 flow [2024-06-03 20:14:52,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 252 transitions, 2767 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:52,027 INFO L231 Difference]: Finished difference. Result has 185 places, 233 transitions, 2241 flow [2024-06-03 20:14:52,027 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2119, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=227, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2241, PETRI_PLACES=185, PETRI_TRANSITIONS=233} [2024-06-03 20:14:52,027 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-03 20:14:52,027 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 233 transitions, 2241 flow [2024-06-03 20:14:52,028 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:52,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:52,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:52,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:14:52,028 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:52,028 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:52,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1664863834, now seen corresponding path program 2 times [2024-06-03 20:14:52,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:52,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1177880390] [2024-06-03 20:14:52,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:52,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:52,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:52,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:52,692 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:52,692 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1177880390] [2024-06-03 20:14:52,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1177880390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:52,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:52,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:52,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300445738] [2024-06-03 20:14:52,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:52,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:52,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:52,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:52,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:52,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:52,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 233 transitions, 2241 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:52,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:52,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:52,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:53,338 INFO L124 PetriNetUnfolderBase]: 1798/2865 cut-off events. [2024-06-03 20:14:53,338 INFO L125 PetriNetUnfolderBase]: For 129401/129403 co-relation queries the response was YES. [2024-06-03 20:14:53,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21402 conditions, 2865 events. 1798/2865 cut-off events. For 129401/129403 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15258 event pairs, 517 based on Foata normal form. 3/2856 useless extension candidates. Maximal degree in co-relation 21316. Up to 2606 conditions per place. [2024-06-03 20:14:53,365 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 209 selfloop transitions, 25 changer transitions 0/256 dead transitions. [2024-06-03 20:14:53,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 256 transitions, 2837 flow [2024-06-03 20:14:53,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:14:53,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:14:53,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 20:14:53,367 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-03 20:14:53,367 INFO L175 Difference]: Start difference. First operand has 185 places, 233 transitions, 2241 flow. Second operand 7 states and 134 transitions. [2024-06-03 20:14:53,367 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 256 transitions, 2837 flow [2024-06-03 20:14:53,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 256 transitions, 2784 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:53,461 INFO L231 Difference]: Finished difference. Result has 189 places, 241 transitions, 2333 flow [2024-06-03 20:14:53,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2333, PETRI_PLACES=189, PETRI_TRANSITIONS=241} [2024-06-03 20:14:53,462 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 146 predicate places. [2024-06-03 20:14:53,462 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 241 transitions, 2333 flow [2024-06-03 20:14:53,462 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:53,462 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:53,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:53,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:14:53,463 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:53,463 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:53,463 INFO L85 PathProgramCache]: Analyzing trace with hash 392088004, now seen corresponding path program 3 times [2024-06-03 20:14:53,463 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:53,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396756619] [2024-06-03 20:14:53,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:53,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:53,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:54,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:54,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:54,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396756619] [2024-06-03 20:14:54,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396756619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:54,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:54,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:54,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140251913] [2024-06-03 20:14:54,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:54,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:54,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:54,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:54,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:54,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:14:54,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 241 transitions, 2333 flow. Second operand has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:54,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:54,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:14:54,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:54,728 INFO L124 PetriNetUnfolderBase]: 1789/2853 cut-off events. [2024-06-03 20:14:54,728 INFO L125 PetriNetUnfolderBase]: For 131979/131981 co-relation queries the response was YES. [2024-06-03 20:14:54,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21421 conditions, 2853 events. 1789/2853 cut-off events. For 131979/131981 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15218 event pairs, 516 based on Foata normal form. 3/2844 useless extension candidates. Maximal degree in co-relation 21333. Up to 2591 conditions per place. [2024-06-03 20:14:54,753 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 212 selfloop transitions, 23 changer transitions 0/257 dead transitions. [2024-06-03 20:14:54,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 257 transitions, 2853 flow [2024-06-03 20:14:54,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:14:54,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:14:54,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-03 20:14:54,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 20:14:54,754 INFO L175 Difference]: Start difference. First operand has 189 places, 241 transitions, 2333 flow. Second operand 6 states and 122 transitions. [2024-06-03 20:14:54,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 257 transitions, 2853 flow [2024-06-03 20:14:54,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 257 transitions, 2768 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-03 20:14:54,858 INFO L231 Difference]: Finished difference. Result has 191 places, 241 transitions, 2305 flow [2024-06-03 20:14:54,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2305, PETRI_PLACES=191, PETRI_TRANSITIONS=241} [2024-06-03 20:14:54,858 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-03 20:14:54,858 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 241 transitions, 2305 flow [2024-06-03 20:14:54,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.875) internal successors, (103), 8 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:54,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:54,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:54,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:14:54,859 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:54,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:54,859 INFO L85 PathProgramCache]: Analyzing trace with hash 392334268, now seen corresponding path program 1 times [2024-06-03 20:14:54,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:54,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510243680] [2024-06-03 20:14:54,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:54,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:54,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:55,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:55,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:55,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510243680] [2024-06-03 20:14:55,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510243680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:55,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:55,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:14:55,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530846846] [2024-06-03 20:14:55,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:55,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:14:55,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:55,672 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:14:55,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:14:55,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:55,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 241 transitions, 2305 flow. Second operand has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:55,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:55,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:55,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:56,237 INFO L124 PetriNetUnfolderBase]: 1883/2945 cut-off events. [2024-06-03 20:14:56,238 INFO L125 PetriNetUnfolderBase]: For 132105/132105 co-relation queries the response was YES. [2024-06-03 20:14:56,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21881 conditions, 2945 events. 1883/2945 cut-off events. For 132105/132105 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15198 event pairs, 578 based on Foata normal form. 2/2945 useless extension candidates. Maximal degree in co-relation 21792. Up to 2813 conditions per place. [2024-06-03 20:14:56,267 INFO L140 encePairwiseOnDemand]: 36/42 looper letters, 233 selfloop transitions, 13 changer transitions 0/251 dead transitions. [2024-06-03 20:14:56,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 251 transitions, 2843 flow [2024-06-03 20:14:56,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:14:56,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:14:56,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 95 transitions. [2024-06-03 20:14:56,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:14:56,268 INFO L175 Difference]: Start difference. First operand has 191 places, 241 transitions, 2305 flow. Second operand 5 states and 95 transitions. [2024-06-03 20:14:56,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 251 transitions, 2843 flow [2024-06-03 20:14:56,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 251 transitions, 2786 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:14:56,382 INFO L231 Difference]: Finished difference. Result has 191 places, 243 transitions, 2307 flow [2024-06-03 20:14:56,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2248, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=241, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2307, PETRI_PLACES=191, PETRI_TRANSITIONS=243} [2024-06-03 20:14:56,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-03 20:14:56,383 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 243 transitions, 2307 flow [2024-06-03 20:14:56,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.0) internal successors, (96), 8 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:56,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:56,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:56,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:14:56,383 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:56,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:56,383 INFO L85 PathProgramCache]: Analyzing trace with hash -454438995, now seen corresponding path program 1 times [2024-06-03 20:14:56,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:56,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369423927] [2024-06-03 20:14:56,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:56,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:56,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:57,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:57,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:57,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369423927] [2024-06-03 20:14:57,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [369423927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:57,309 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:57,309 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:57,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167086314] [2024-06-03 20:14:57,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:57,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:57,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:57,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:57,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:57,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:57,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 243 transitions, 2307 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:57,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:57,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:57,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:58,064 INFO L124 PetriNetUnfolderBase]: 1900/2972 cut-off events. [2024-06-03 20:14:58,064 INFO L125 PetriNetUnfolderBase]: For 140589/140589 co-relation queries the response was YES. [2024-06-03 20:14:58,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22228 conditions, 2972 events. 1900/2972 cut-off events. For 140589/140589 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15426 event pairs, 430 based on Foata normal form. 4/2974 useless extension candidates. Maximal degree in co-relation 22138. Up to 2767 conditions per place. [2024-06-03 20:14:58,093 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 242 selfloop transitions, 28 changer transitions 0/275 dead transitions. [2024-06-03 20:14:58,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 275 transitions, 2973 flow [2024-06-03 20:14:58,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:58,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:58,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:14:58,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:14:58,094 INFO L175 Difference]: Start difference. First operand has 191 places, 243 transitions, 2307 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:14:58,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 275 transitions, 2973 flow [2024-06-03 20:14:58,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 275 transitions, 2930 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:14:58,202 INFO L231 Difference]: Finished difference. Result has 197 places, 245 transitions, 2365 flow [2024-06-03 20:14:58,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2264, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=215, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2365, PETRI_PLACES=197, PETRI_TRANSITIONS=245} [2024-06-03 20:14:58,203 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 20:14:58,203 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 245 transitions, 2365 flow [2024-06-03 20:14:58,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:58,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:14:58,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:14:58,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:14:58,204 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:14:58,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:14:58,204 INFO L85 PathProgramCache]: Analyzing trace with hash -454586865, now seen corresponding path program 2 times [2024-06-03 20:14:58,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:14:58,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237650289] [2024-06-03 20:14:58,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:14:58,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:14:58,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:14:59,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:14:59,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:14:59,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237650289] [2024-06-03 20:14:59,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237650289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:14:59,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:14:59,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:14:59,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889427519] [2024-06-03 20:14:59,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:14:59,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:14:59,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:14:59,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:14:59,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:14:59,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:14:59,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 245 transitions, 2365 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:14:59,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:14:59,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:14:59,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:14:59,816 INFO L124 PetriNetUnfolderBase]: 1942/3038 cut-off events. [2024-06-03 20:14:59,817 INFO L125 PetriNetUnfolderBase]: For 151196/151196 co-relation queries the response was YES. [2024-06-03 20:14:59,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23132 conditions, 3038 events. 1942/3038 cut-off events. For 151196/151196 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15887 event pairs, 426 based on Foata normal form. 4/3040 useless extension candidates. Maximal degree in co-relation 23041. Up to 2768 conditions per place. [2024-06-03 20:14:59,848 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 33 changer transitions 0/284 dead transitions. [2024-06-03 20:14:59,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 284 transitions, 3281 flow [2024-06-03 20:14:59,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:14:59,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:14:59,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:14:59,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 20:14:59,852 INFO L175 Difference]: Start difference. First operand has 197 places, 245 transitions, 2365 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:14:59,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 284 transitions, 3281 flow [2024-06-03 20:15:00,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 284 transitions, 3200 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:00,062 INFO L231 Difference]: Finished difference. Result has 200 places, 251 transitions, 2486 flow [2024-06-03 20:15:00,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2284, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2486, PETRI_PLACES=200, PETRI_TRANSITIONS=251} [2024-06-03 20:15:00,063 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-03 20:15:00,063 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 251 transitions, 2486 flow [2024-06-03 20:15:00,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:00,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:00,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:00,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:15:00,063 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:00,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:00,064 INFO L85 PathProgramCache]: Analyzing trace with hash -255137205, now seen corresponding path program 3 times [2024-06-03 20:15:00,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:00,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505451569] [2024-06-03 20:15:00,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:00,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:00,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:00,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:00,889 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:00,889 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505451569] [2024-06-03 20:15:00,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [505451569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:00,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:00,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:00,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1292297703] [2024-06-03 20:15:00,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:00,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:00,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:00,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:00,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:00,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:00,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 251 transitions, 2486 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:00,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:00,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:00,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:01,729 INFO L124 PetriNetUnfolderBase]: 1934/3026 cut-off events. [2024-06-03 20:15:01,729 INFO L125 PetriNetUnfolderBase]: For 155895/155895 co-relation queries the response was YES. [2024-06-03 20:15:01,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23274 conditions, 3026 events. 1934/3026 cut-off events. For 155895/155895 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 15785 event pairs, 433 based on Foata normal form. 4/3028 useless extension candidates. Maximal degree in co-relation 23181. Up to 2821 conditions per place. [2024-06-03 20:15:01,757 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 28 changer transitions 0/281 dead transitions. [2024-06-03 20:15:01,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 281 transitions, 3130 flow [2024-06-03 20:15:01,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:01,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:01,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:15:01,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:15:01,759 INFO L175 Difference]: Start difference. First operand has 200 places, 251 transitions, 2486 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:15:01,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 281 transitions, 3130 flow [2024-06-03 20:15:01,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 281 transitions, 3009 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:01,873 INFO L231 Difference]: Finished difference. Result has 204 places, 251 transitions, 2428 flow [2024-06-03 20:15:01,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2365, PETRI_DIFFERENCE_MINUEND_PLACES=195, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2428, PETRI_PLACES=204, PETRI_TRANSITIONS=251} [2024-06-03 20:15:01,873 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 161 predicate places. [2024-06-03 20:15:01,873 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 251 transitions, 2428 flow [2024-06-03 20:15:01,874 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:01,874 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:01,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:01,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:15:01,874 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:01,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:01,874 INFO L85 PathProgramCache]: Analyzing trace with hash -402480611, now seen corresponding path program 4 times [2024-06-03 20:15:01,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:01,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597903413] [2024-06-03 20:15:01,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:01,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:01,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:02,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:02,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:02,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597903413] [2024-06-03 20:15:02,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597903413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:02,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:02,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:02,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872982131] [2024-06-03 20:15:02,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:02,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:02,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:02,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:02,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:02,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:02,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 251 transitions, 2428 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:02,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:02,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:02,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:03,561 INFO L124 PetriNetUnfolderBase]: 1951/3053 cut-off events. [2024-06-03 20:15:03,562 INFO L125 PetriNetUnfolderBase]: For 162423/162423 co-relation queries the response was YES. [2024-06-03 20:15:03,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23483 conditions, 3053 events. 1951/3053 cut-off events. For 162423/162423 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 15957 event pairs, 310 based on Foata normal form. 4/3055 useless extension candidates. Maximal degree in co-relation 23388. Up to 2797 conditions per place. [2024-06-03 20:15:03,593 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 259 selfloop transitions, 27 changer transitions 0/291 dead transitions. [2024-06-03 20:15:03,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 291 transitions, 3218 flow [2024-06-03 20:15:03,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:03,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:03,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:15:03,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:15:03,595 INFO L175 Difference]: Start difference. First operand has 204 places, 251 transitions, 2428 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:15:03,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 291 transitions, 3218 flow [2024-06-03 20:15:03,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 291 transitions, 3161 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:03,723 INFO L231 Difference]: Finished difference. Result has 208 places, 257 transitions, 2564 flow [2024-06-03 20:15:03,723 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=226, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2564, PETRI_PLACES=208, PETRI_TRANSITIONS=257} [2024-06-03 20:15:03,723 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 165 predicate places. [2024-06-03 20:15:03,723 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 257 transitions, 2564 flow [2024-06-03 20:15:03,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:03,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:03,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:03,724 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:15:03,724 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:03,724 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:03,724 INFO L85 PathProgramCache]: Analyzing trace with hash 1256763385, now seen corresponding path program 5 times [2024-06-03 20:15:03,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:03,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323228956] [2024-06-03 20:15:03,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:03,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:03,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:04,662 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:04,662 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:04,662 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323228956] [2024-06-03 20:15:04,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323228956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:04,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:04,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:04,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472177524] [2024-06-03 20:15:04,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:04,663 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:04,663 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:04,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:04,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:04,728 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:04,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 257 transitions, 2564 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:04,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:04,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:04,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:05,447 INFO L124 PetriNetUnfolderBase]: 1993/3119 cut-off events. [2024-06-03 20:15:05,447 INFO L125 PetriNetUnfolderBase]: For 175843/175843 co-relation queries the response was YES. [2024-06-03 20:15:05,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24491 conditions, 3119 events. 1993/3119 cut-off events. For 175843/175843 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 16422 event pairs, 396 based on Foata normal form. 4/3121 useless extension candidates. Maximal degree in co-relation 24393. Up to 2835 conditions per place. [2024-06-03 20:15:05,473 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 256 selfloop transitions, 36 changer transitions 0/297 dead transitions. [2024-06-03 20:15:05,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 297 transitions, 3516 flow [2024-06-03 20:15:05,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:05,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:05,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-03 20:15:05,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603174603174603 [2024-06-03 20:15:05,475 INFO L175 Difference]: Start difference. First operand has 208 places, 257 transitions, 2564 flow. Second operand 9 states and 174 transitions. [2024-06-03 20:15:05,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 297 transitions, 3516 flow [2024-06-03 20:15:05,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 297 transitions, 3392 flow, removed 49 selfloop flow, removed 4 redundant places. [2024-06-03 20:15:05,608 INFO L231 Difference]: Finished difference. Result has 214 places, 262 transitions, 2636 flow [2024-06-03 20:15:05,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2440, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2636, PETRI_PLACES=214, PETRI_TRANSITIONS=262} [2024-06-03 20:15:05,609 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 171 predicate places. [2024-06-03 20:15:05,609 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 262 transitions, 2636 flow [2024-06-03 20:15:05,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:05,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:05,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:05,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:15:05,610 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:05,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:05,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1256911255, now seen corresponding path program 6 times [2024-06-03 20:15:05,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:05,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158166874] [2024-06-03 20:15:05,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:05,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:05,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:06,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:06,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:06,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158166874] [2024-06-03 20:15:06,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158166874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:06,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:06,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:06,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688235560] [2024-06-03 20:15:06,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:06,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:06,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:06,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:06,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:06,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:06,607 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 262 transitions, 2636 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:06,607 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:06,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:06,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:07,317 INFO L124 PetriNetUnfolderBase]: 1985/3107 cut-off events. [2024-06-03 20:15:07,317 INFO L125 PetriNetUnfolderBase]: For 178722/178722 co-relation queries the response was YES. [2024-06-03 20:15:07,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24498 conditions, 3107 events. 1985/3107 cut-off events. For 178722/178722 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 16310 event pairs, 406 based on Foata normal form. 4/3109 useless extension candidates. Maximal degree in co-relation 24397. Up to 2875 conditions per place. [2024-06-03 20:15:07,403 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 255 selfloop transitions, 35 changer transitions 0/295 dead transitions. [2024-06-03 20:15:07,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 295 transitions, 3349 flow [2024-06-03 20:15:07,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:07,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:15:07,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:15:07,404 INFO L175 Difference]: Start difference. First operand has 214 places, 262 transitions, 2636 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:15:07,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 295 transitions, 3349 flow [2024-06-03 20:15:07,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 295 transitions, 3188 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:07,575 INFO L231 Difference]: Finished difference. Result has 218 places, 263 transitions, 2590 flow [2024-06-03 20:15:07,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2505, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2590, PETRI_PLACES=218, PETRI_TRANSITIONS=263} [2024-06-03 20:15:07,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 20:15:07,576 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 263 transitions, 2590 flow [2024-06-03 20:15:07,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:07,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:07,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:07,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:15:07,576 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:07,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:07,577 INFO L85 PathProgramCache]: Analyzing trace with hash 1375822039, now seen corresponding path program 1 times [2024-06-03 20:15:07,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:07,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746019120] [2024-06-03 20:15:07,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:07,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:07,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:08,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:08,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746019120] [2024-06-03 20:15:08,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [746019120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:08,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:08,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:08,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402834752] [2024-06-03 20:15:08,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:08,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:08,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:08,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:08,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:08,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:08,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 263 transitions, 2590 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:08,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:08,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:08,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:09,908 INFO L124 PetriNetUnfolderBase]: 2043/3205 cut-off events. [2024-06-03 20:15:09,908 INFO L125 PetriNetUnfolderBase]: For 196855/196855 co-relation queries the response was YES. [2024-06-03 20:15:09,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25058 conditions, 3205 events. 2043/3205 cut-off events. For 196855/196855 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 16982 event pairs, 413 based on Foata normal form. 16/3219 useless extension candidates. Maximal degree in co-relation 24955. Up to 2917 conditions per place. [2024-06-03 20:15:09,936 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 30 changer transitions 0/301 dead transitions. [2024-06-03 20:15:09,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 301 transitions, 3356 flow [2024-06-03 20:15:09,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:09,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:09,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:15:09,945 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:15:09,945 INFO L175 Difference]: Start difference. First operand has 218 places, 263 transitions, 2590 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:15:09,945 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 301 transitions, 3356 flow [2024-06-03 20:15:10,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 301 transitions, 3290 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:10,107 INFO L231 Difference]: Finished difference. Result has 221 places, 264 transitions, 2619 flow [2024-06-03 20:15:10,107 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2524, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2619, PETRI_PLACES=221, PETRI_TRANSITIONS=264} [2024-06-03 20:15:10,108 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 178 predicate places. [2024-06-03 20:15:10,108 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 264 transitions, 2619 flow [2024-06-03 20:15:10,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:10,108 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:10,108 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:10,108 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:15:10,109 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:10,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:10,109 INFO L85 PathProgramCache]: Analyzing trace with hash 4445593, now seen corresponding path program 2 times [2024-06-03 20:15:10,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:10,109 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611939939] [2024-06-03 20:15:10,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:10,109 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:11,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:11,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:11,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611939939] [2024-06-03 20:15:11,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611939939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:11,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:11,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:11,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788817918] [2024-06-03 20:15:11,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:11,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:11,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:11,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:11,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:11,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:11,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 264 transitions, 2619 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:11,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:11,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:11,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:12,301 INFO L124 PetriNetUnfolderBase]: 2101/3303 cut-off events. [2024-06-03 20:15:12,301 INFO L125 PetriNetUnfolderBase]: For 207434/207434 co-relation queries the response was YES. [2024-06-03 20:15:12,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25882 conditions, 3303 events. 2101/3303 cut-off events. For 207434/207434 co-relation queries the response was YES. Maximal size of possible extension queue 175. Compared 17764 event pairs, 424 based on Foata normal form. 16/3317 useless extension candidates. Maximal degree in co-relation 25778. Up to 3015 conditions per place. [2024-06-03 20:15:12,332 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 267 selfloop transitions, 30 changer transitions 0/302 dead transitions. [2024-06-03 20:15:12,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 302 transitions, 3389 flow [2024-06-03 20:15:12,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:12,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:12,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:15:12,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:15:12,334 INFO L175 Difference]: Start difference. First operand has 221 places, 264 transitions, 2619 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:15:12,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 302 transitions, 3389 flow [2024-06-03 20:15:12,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 302 transitions, 3320 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:12,521 INFO L231 Difference]: Finished difference. Result has 223 places, 265 transitions, 2647 flow [2024-06-03 20:15:12,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2550, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2647, PETRI_PLACES=223, PETRI_TRANSITIONS=265} [2024-06-03 20:15:12,522 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 180 predicate places. [2024-06-03 20:15:12,522 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 265 transitions, 2647 flow [2024-06-03 20:15:12,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:12,523 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:12,523 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:12,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:15:12,523 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:12,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:12,523 INFO L85 PathProgramCache]: Analyzing trace with hash 11797243, now seen corresponding path program 3 times [2024-06-03 20:15:12,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:12,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390787536] [2024-06-03 20:15:12,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:12,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:12,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:13,594 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:13,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:13,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390787536] [2024-06-03 20:15:13,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1390787536] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:13,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:13,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:13,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254285586] [2024-06-03 20:15:13,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:13,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:13,595 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:13,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:13,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:13,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:13,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 265 transitions, 2647 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:13,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:13,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:13,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:14,542 INFO L124 PetriNetUnfolderBase]: 2159/3405 cut-off events. [2024-06-03 20:15:14,542 INFO L125 PetriNetUnfolderBase]: For 217412/217412 co-relation queries the response was YES. [2024-06-03 20:15:14,565 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26682 conditions, 3405 events. 2159/3405 cut-off events. For 217412/217412 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 18531 event pairs, 438 based on Foata normal form. 16/3419 useless extension candidates. Maximal degree in co-relation 26577. Up to 3086 conditions per place. [2024-06-03 20:15:14,578 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 38 changer transitions 0/303 dead transitions. [2024-06-03 20:15:14,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 303 transitions, 3425 flow [2024-06-03 20:15:14,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:14,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:14,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 20:15:14,579 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 20:15:14,579 INFO L175 Difference]: Start difference. First operand has 223 places, 265 transitions, 2647 flow. Second operand 10 states and 189 transitions. [2024-06-03 20:15:14,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 303 transitions, 3425 flow [2024-06-03 20:15:14,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 303 transitions, 3354 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:14,799 INFO L231 Difference]: Finished difference. Result has 225 places, 266 transitions, 2695 flow [2024-06-03 20:15:14,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2576, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2695, PETRI_PLACES=225, PETRI_TRANSITIONS=266} [2024-06-03 20:15:14,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 182 predicate places. [2024-06-03 20:15:14,799 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 266 transitions, 2695 flow [2024-06-03 20:15:14,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:14,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:14,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:14,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:15:14,800 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:14,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:14,800 INFO L85 PathProgramCache]: Analyzing trace with hash 1582742389, now seen corresponding path program 4 times [2024-06-03 20:15:14,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:14,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371726379] [2024-06-03 20:15:14,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:14,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:14,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:15,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:15,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:15,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371726379] [2024-06-03 20:15:15,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371726379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:15,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:15,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:15,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156853457] [2024-06-03 20:15:15,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:15,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:15,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:15,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:15,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:16,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:16,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 266 transitions, 2695 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:16,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:16,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:16,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:16,959 INFO L124 PetriNetUnfolderBase]: 2261/3585 cut-off events. [2024-06-03 20:15:16,959 INFO L125 PetriNetUnfolderBase]: For 236179/236179 co-relation queries the response was YES. [2024-06-03 20:15:16,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28435 conditions, 3585 events. 2261/3585 cut-off events. For 236179/236179 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 19822 event pairs, 458 based on Foata normal form. 12/3595 useless extension candidates. Maximal degree in co-relation 28329. Up to 2848 conditions per place. [2024-06-03 20:15:16,998 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 260 selfloop transitions, 45 changer transitions 0/310 dead transitions. [2024-06-03 20:15:16,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 310 transitions, 3733 flow [2024-06-03 20:15:16,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:16,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:16,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-03 20:15:16,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46190476190476193 [2024-06-03 20:15:17,000 INFO L175 Difference]: Start difference. First operand has 225 places, 266 transitions, 2695 flow. Second operand 10 states and 194 transitions. [2024-06-03 20:15:17,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 310 transitions, 3733 flow [2024-06-03 20:15:17,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 310 transitions, 3644 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:17,211 INFO L231 Difference]: Finished difference. Result has 228 places, 268 transitions, 2789 flow [2024-06-03 20:15:17,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=266, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2789, PETRI_PLACES=228, PETRI_TRANSITIONS=268} [2024-06-03 20:15:17,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 185 predicate places. [2024-06-03 20:15:17,212 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 268 transitions, 2789 flow [2024-06-03 20:15:17,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:17,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:17,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:17,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:15:17,212 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:17,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:17,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1256917207, now seen corresponding path program 5 times [2024-06-03 20:15:17,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:17,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508467457] [2024-06-03 20:15:17,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:17,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:17,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:18,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:18,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:18,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508467457] [2024-06-03 20:15:18,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508467457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:18,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:18,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539721114] [2024-06-03 20:15:18,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:18,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:18,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:18,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:18,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:18,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:18,382 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 268 transitions, 2789 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:18,382 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:18,382 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:18,382 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:19,262 INFO L124 PetriNetUnfolderBase]: 2319/3693 cut-off events. [2024-06-03 20:15:19,263 INFO L125 PetriNetUnfolderBase]: For 252512/252512 co-relation queries the response was YES. [2024-06-03 20:15:19,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29451 conditions, 3693 events. 2319/3693 cut-off events. For 252512/252512 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 20721 event pairs, 486 based on Foata normal form. 16/3707 useless extension candidates. Maximal degree in co-relation 29343. Up to 3358 conditions per place. [2024-06-03 20:15:19,300 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 266 selfloop transitions, 37 changer transitions 0/308 dead transitions. [2024-06-03 20:15:19,300 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 308 transitions, 3587 flow [2024-06-03 20:15:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:19,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:19,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 20:15:19,301 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 20:15:19,301 INFO L175 Difference]: Start difference. First operand has 228 places, 268 transitions, 2789 flow. Second operand 10 states and 189 transitions. [2024-06-03 20:15:19,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 308 transitions, 3587 flow [2024-06-03 20:15:19,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 308 transitions, 3492 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:19,545 INFO L231 Difference]: Finished difference. Result has 231 places, 269 transitions, 2815 flow [2024-06-03 20:15:19,545 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2694, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2815, PETRI_PLACES=231, PETRI_TRANSITIONS=269} [2024-06-03 20:15:19,546 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-03 20:15:19,546 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 269 transitions, 2815 flow [2024-06-03 20:15:19,546 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:19,546 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:19,546 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:19,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:15:19,546 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:19,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:19,547 INFO L85 PathProgramCache]: Analyzing trace with hash -1195272531, now seen corresponding path program 7 times [2024-06-03 20:15:19,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:19,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491063482] [2024-06-03 20:15:19,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:19,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:19,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:20,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:20,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491063482] [2024-06-03 20:15:20,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491063482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:20,374 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:20,374 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:20,374 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721778753] [2024-06-03 20:15:20,374 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:20,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:20,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:20,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:20,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:20,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:20,460 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 269 transitions, 2815 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:20,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:20,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:20,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:21,271 INFO L124 PetriNetUnfolderBase]: 2336/3717 cut-off events. [2024-06-03 20:15:21,272 INFO L125 PetriNetUnfolderBase]: For 248559/248559 co-relation queries the response was YES. [2024-06-03 20:15:21,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29725 conditions, 3717 events. 2336/3717 cut-off events. For 248559/248559 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20845 event pairs, 493 based on Foata normal form. 4/3715 useless extension candidates. Maximal degree in co-relation 29616. Up to 3414 conditions per place. [2024-06-03 20:15:21,308 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 246 selfloop transitions, 48 changer transitions 0/299 dead transitions. [2024-06-03 20:15:21,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 299 transitions, 3541 flow [2024-06-03 20:15:21,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:21,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:21,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:15:21,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:15:21,310 INFO L175 Difference]: Start difference. First operand has 231 places, 269 transitions, 2815 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:15:21,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 299 transitions, 3541 flow [2024-06-03 20:15:21,536 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 299 transitions, 3450 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:21,539 INFO L231 Difference]: Finished difference. Result has 232 places, 271 transitions, 2883 flow [2024-06-03 20:15:21,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2724, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2883, PETRI_PLACES=232, PETRI_TRANSITIONS=271} [2024-06-03 20:15:21,540 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-03 20:15:21,540 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 271 transitions, 2883 flow [2024-06-03 20:15:21,540 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:21,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:21,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:21,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:15:21,541 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:21,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:21,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1394718471, now seen corresponding path program 8 times [2024-06-03 20:15:21,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:21,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859372623] [2024-06-03 20:15:21,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:21,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:21,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:22,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:22,398 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:22,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859372623] [2024-06-03 20:15:22,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859372623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:22,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:22,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:22,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453483110] [2024-06-03 20:15:22,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:22,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:22,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:22,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:22,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:22,472 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:22,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 271 transitions, 2883 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:22,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:22,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:22,473 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:23,415 INFO L124 PetriNetUnfolderBase]: 2353/3734 cut-off events. [2024-06-03 20:15:23,415 INFO L125 PetriNetUnfolderBase]: For 258001/258001 co-relation queries the response was YES. [2024-06-03 20:15:23,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30134 conditions, 3734 events. 2353/3734 cut-off events. For 258001/258001 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 20925 event pairs, 488 based on Foata normal form. 4/3732 useless extension candidates. Maximal degree in co-relation 30024. Up to 3441 conditions per place. [2024-06-03 20:15:23,454 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 49 changer transitions 0/301 dead transitions. [2024-06-03 20:15:23,454 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 301 transitions, 3617 flow [2024-06-03 20:15:23,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:23,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:23,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-03 20:15:23,455 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4497354497354497 [2024-06-03 20:15:23,455 INFO L175 Difference]: Start difference. First operand has 232 places, 271 transitions, 2883 flow. Second operand 9 states and 170 transitions. [2024-06-03 20:15:23,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 301 transitions, 3617 flow [2024-06-03 20:15:23,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 301 transitions, 3478 flow, removed 23 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:23,694 INFO L231 Difference]: Finished difference. Result has 234 places, 273 transitions, 2909 flow [2024-06-03 20:15:23,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2744, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2909, PETRI_PLACES=234, PETRI_TRANSITIONS=273} [2024-06-03 20:15:23,695 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 20:15:23,695 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 273 transitions, 2909 flow [2024-06-03 20:15:23,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:23,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:23,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:23,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:15:23,695 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:23,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:23,696 INFO L85 PathProgramCache]: Analyzing trace with hash 205265769, now seen corresponding path program 9 times [2024-06-03 20:15:23,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:23,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242902128] [2024-06-03 20:15:23,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:23,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:23,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:24,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:24,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:24,625 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242902128] [2024-06-03 20:15:24,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242902128] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:24,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:24,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:24,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695060257] [2024-06-03 20:15:24,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:24,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:24,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:24,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:24,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:24,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:24,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 273 transitions, 2909 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:24,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:24,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:24,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:25,603 INFO L124 PetriNetUnfolderBase]: 2345/3732 cut-off events. [2024-06-03 20:15:25,604 INFO L125 PetriNetUnfolderBase]: For 262261/262261 co-relation queries the response was YES. [2024-06-03 20:15:25,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30033 conditions, 3732 events. 2345/3732 cut-off events. For 262261/262261 co-relation queries the response was YES. Maximal size of possible extension queue 212. Compared 21010 event pairs, 491 based on Foata normal form. 4/3730 useless extension candidates. Maximal degree in co-relation 29922. Up to 3429 conditions per place. [2024-06-03 20:15:25,646 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 248 selfloop transitions, 50 changer transitions 0/303 dead transitions. [2024-06-03 20:15:25,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 303 transitions, 3651 flow [2024-06-03 20:15:25,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:25,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:25,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:15:25,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:15:25,648 INFO L175 Difference]: Start difference. First operand has 234 places, 273 transitions, 2909 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:15:25,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 303 transitions, 3651 flow [2024-06-03 20:15:25,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 303 transitions, 3506 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:25,950 INFO L231 Difference]: Finished difference. Result has 236 places, 275 transitions, 2935 flow [2024-06-03 20:15:25,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2764, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2935, PETRI_PLACES=236, PETRI_TRANSITIONS=275} [2024-06-03 20:15:25,950 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 193 predicate places. [2024-06-03 20:15:25,950 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 275 transitions, 2935 flow [2024-06-03 20:15:25,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:25,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:25,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:25,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:15:25,951 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:25,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:25,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1724754461, now seen corresponding path program 10 times [2024-06-03 20:15:25,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:25,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440936988] [2024-06-03 20:15:25,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:25,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:26,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:26,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:26,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440936988] [2024-06-03 20:15:26,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440936988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:26,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:26,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:15:26,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1506900643] [2024-06-03 20:15:26,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:26,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:15:26,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:26,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:15:26,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:15:27,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:27,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 275 transitions, 2935 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:27,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:27,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:27,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:28,005 INFO L124 PetriNetUnfolderBase]: 2337/3720 cut-off events. [2024-06-03 20:15:28,005 INFO L125 PetriNetUnfolderBase]: For 266185/266185 co-relation queries the response was YES. [2024-06-03 20:15:28,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29872 conditions, 3720 events. 2337/3720 cut-off events. For 266185/266185 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 20881 event pairs, 482 based on Foata normal form. 4/3718 useless extension candidates. Maximal degree in co-relation 29760. Up to 3340 conditions per place. [2024-06-03 20:15:28,041 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 247 selfloop transitions, 56 changer transitions 0/308 dead transitions. [2024-06-03 20:15:28,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 308 transitions, 3739 flow [2024-06-03 20:15:28,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:28,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:28,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:15:28,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:15:28,042 INFO L175 Difference]: Start difference. First operand has 236 places, 275 transitions, 2935 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:15:28,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 308 transitions, 3739 flow [2024-06-03 20:15:28,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 308 transitions, 3588 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:28,274 INFO L231 Difference]: Finished difference. Result has 239 places, 279 transitions, 3031 flow [2024-06-03 20:15:28,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2784, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3031, PETRI_PLACES=239, PETRI_TRANSITIONS=279} [2024-06-03 20:15:28,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-03 20:15:28,274 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 279 transitions, 3031 flow [2024-06-03 20:15:28,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:28,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:28,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:28,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:15:28,275 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:28,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:28,277 INFO L85 PathProgramCache]: Analyzing trace with hash 1730479913, now seen corresponding path program 6 times [2024-06-03 20:15:28,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:28,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610244575] [2024-06-03 20:15:28,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:28,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:28,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:29,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:29,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:29,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610244575] [2024-06-03 20:15:29,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610244575] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:29,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:29,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:29,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040316465] [2024-06-03 20:15:29,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:29,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:29,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:29,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:29,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:29,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:29,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 279 transitions, 3031 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:29,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:29,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:29,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:30,616 INFO L124 PetriNetUnfolderBase]: 2550/4085 cut-off events. [2024-06-03 20:15:30,617 INFO L125 PetriNetUnfolderBase]: For 334625/334625 co-relation queries the response was YES. [2024-06-03 20:15:30,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34313 conditions, 4085 events. 2550/4085 cut-off events. For 334625/334625 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 23665 event pairs, 541 based on Foata normal form. 12/4091 useless extension candidates. Maximal degree in co-relation 34199. Up to 3345 conditions per place. [2024-06-03 20:15:30,657 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 254 selfloop transitions, 63 changer transitions 0/322 dead transitions. [2024-06-03 20:15:30,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 322 transitions, 4167 flow [2024-06-03 20:15:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:30,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:30,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 20:15:30,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 20:15:30,658 INFO L175 Difference]: Start difference. First operand has 239 places, 279 transitions, 3031 flow. Second operand 10 states and 196 transitions. [2024-06-03 20:15:30,658 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 322 transitions, 4167 flow [2024-06-03 20:15:30,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 322 transitions, 4014 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-03 20:15:30,999 INFO L231 Difference]: Finished difference. Result has 245 places, 282 transitions, 3151 flow [2024-06-03 20:15:30,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2878, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3151, PETRI_PLACES=245, PETRI_TRANSITIONS=282} [2024-06-03 20:15:30,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-03 20:15:30,999 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 282 transitions, 3151 flow [2024-06-03 20:15:30,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:31,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:31,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:31,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:15:31,000 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:31,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:31,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1730270663, now seen corresponding path program 7 times [2024-06-03 20:15:31,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:31,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952677360] [2024-06-03 20:15:31,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:31,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:31,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:32,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:32,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:32,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952677360] [2024-06-03 20:15:32,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952677360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:32,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:32,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:32,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251586216] [2024-06-03 20:15:32,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:32,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:32,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:32,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:32,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:32,263 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:32,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 282 transitions, 3151 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:32,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:32,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:32,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:33,357 INFO L124 PetriNetUnfolderBase]: 2608/4183 cut-off events. [2024-06-03 20:15:33,357 INFO L125 PetriNetUnfolderBase]: For 354799/354799 co-relation queries the response was YES. [2024-06-03 20:15:33,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35361 conditions, 4183 events. 2608/4183 cut-off events. For 354799/354799 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 24513 event pairs, 571 based on Foata normal form. 16/4193 useless extension candidates. Maximal degree in co-relation 35244. Up to 3787 conditions per place. [2024-06-03 20:15:33,399 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 263 selfloop transitions, 50 changer transitions 0/318 dead transitions. [2024-06-03 20:15:33,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 318 transitions, 3960 flow [2024-06-03 20:15:33,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:33,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:33,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 20:15:33,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:15:33,401 INFO L175 Difference]: Start difference. First operand has 245 places, 282 transitions, 3151 flow. Second operand 10 states and 190 transitions. [2024-06-03 20:15:33,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 318 transitions, 3960 flow [2024-06-03 20:15:33,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 248 places, 318 transitions, 3847 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:33,704 INFO L231 Difference]: Finished difference. Result has 249 places, 283 transitions, 3188 flow [2024-06-03 20:15:33,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3042, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=232, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3188, PETRI_PLACES=249, PETRI_TRANSITIONS=283} [2024-06-03 20:15:33,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 206 predicate places. [2024-06-03 20:15:33,705 INFO L495 AbstractCegarLoop]: Abstraction has has 249 places, 283 transitions, 3188 flow [2024-06-03 20:15:33,705 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:33,705 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:33,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:33,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:15:33,705 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:33,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:33,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1931561723, now seen corresponding path program 8 times [2024-06-03 20:15:33,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:33,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365092507] [2024-06-03 20:15:33,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:33,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:33,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:34,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:34,750 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:34,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365092507] [2024-06-03 20:15:34,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365092507] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:34,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:34,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:34,750 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288601446] [2024-06-03 20:15:34,750 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:34,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:34,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:34,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:34,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:34,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:34,858 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 249 places, 283 transitions, 3188 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:34,858 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:34,858 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:34,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:35,940 INFO L124 PetriNetUnfolderBase]: 2580/4135 cut-off events. [2024-06-03 20:15:35,940 INFO L125 PetriNetUnfolderBase]: For 340592/340592 co-relation queries the response was YES. [2024-06-03 20:15:35,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34238 conditions, 4135 events. 2580/4135 cut-off events. For 340592/340592 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 24090 event pairs, 564 based on Foata normal form. 16/4140 useless extension candidates. Maximal degree in co-relation 34119. Up to 3644 conditions per place. [2024-06-03 20:15:35,985 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 238 selfloop transitions, 74 changer transitions 0/317 dead transitions. [2024-06-03 20:15:35,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 317 transitions, 3948 flow [2024-06-03 20:15:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-03 20:15:35,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-03 20:15:35,986 INFO L175 Difference]: Start difference. First operand has 249 places, 283 transitions, 3188 flow. Second operand 10 states and 192 transitions. [2024-06-03 20:15:35,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 317 transitions, 3948 flow [2024-06-03 20:15:36,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 250 places, 317 transitions, 3831 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:36,319 INFO L231 Difference]: Finished difference. Result has 251 places, 283 transitions, 3226 flow [2024-06-03 20:15:36,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3071, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3226, PETRI_PLACES=251, PETRI_TRANSITIONS=283} [2024-06-03 20:15:36,319 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 208 predicate places. [2024-06-03 20:15:36,320 INFO L495 AbstractCegarLoop]: Abstraction has has 251 places, 283 transitions, 3226 flow [2024-06-03 20:15:36,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:36,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:36,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:36,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:15:36,320 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:36,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:36,321 INFO L85 PathProgramCache]: Analyzing trace with hash 1058066827, now seen corresponding path program 9 times [2024-06-03 20:15:36,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:36,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297776789] [2024-06-03 20:15:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:36,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:36,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:37,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:37,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:37,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297776789] [2024-06-03 20:15:37,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297776789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:37,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:37,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:37,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966497467] [2024-06-03 20:15:37,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:37,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:37,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:37,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:37,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:37,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:37,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 251 places, 283 transitions, 3226 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:37,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:37,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:37,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:38,555 INFO L124 PetriNetUnfolderBase]: 2804/4515 cut-off events. [2024-06-03 20:15:38,555 INFO L125 PetriNetUnfolderBase]: For 405686/405686 co-relation queries the response was YES. [2024-06-03 20:15:38,591 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38894 conditions, 4515 events. 2804/4515 cut-off events. For 405686/405686 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 26821 event pairs, 554 based on Foata normal form. 12/4516 useless extension candidates. Maximal degree in co-relation 38774. Up to 2726 conditions per place. [2024-06-03 20:15:38,610 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 198 selfloop transitions, 124 changer transitions 0/327 dead transitions. [2024-06-03 20:15:38,611 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 327 transitions, 4425 flow [2024-06-03 20:15:38,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:38,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:38,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 20:15:38,612 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 20:15:38,612 INFO L175 Difference]: Start difference. First operand has 251 places, 283 transitions, 3226 flow. Second operand 10 states and 196 transitions. [2024-06-03 20:15:38,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 327 transitions, 4425 flow [2024-06-03 20:15:39,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 327 transitions, 4264 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:39,036 INFO L231 Difference]: Finished difference. Result has 254 places, 287 transitions, 3534 flow [2024-06-03 20:15:39,037 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=283, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3534, PETRI_PLACES=254, PETRI_TRANSITIONS=287} [2024-06-03 20:15:39,037 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-03 20:15:39,037 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 287 transitions, 3534 flow [2024-06-03 20:15:39,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:39,037 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:39,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:39,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:15:39,038 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:39,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:39,038 INFO L85 PathProgramCache]: Analyzing trace with hash 488789469, now seen corresponding path program 10 times [2024-06-03 20:15:39,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:39,038 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104015999] [2024-06-03 20:15:39,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:39,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:39,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:40,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:40,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:40,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104015999] [2024-06-03 20:15:40,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104015999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:40,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:40,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:40,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612020509] [2024-06-03 20:15:40,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:40,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:40,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:40,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:40,171 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:40,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:40,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 287 transitions, 3534 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:40,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:40,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:40,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:41,349 INFO L124 PetriNetUnfolderBase]: 2862/4613 cut-off events. [2024-06-03 20:15:41,349 INFO L125 PetriNetUnfolderBase]: For 430035/430035 co-relation queries the response was YES. [2024-06-03 20:15:41,385 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40423 conditions, 4613 events. 2862/4613 cut-off events. For 430035/430035 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 27641 event pairs, 660 based on Foata normal form. 16/4618 useless extension candidates. Maximal degree in co-relation 40301. Up to 4131 conditions per place. [2024-06-03 20:15:41,403 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 242 selfloop transitions, 75 changer transitions 0/322 dead transitions. [2024-06-03 20:15:41,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 322 transitions, 4351 flow [2024-06-03 20:15:41,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:41,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:41,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 20:15:41,406 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-03 20:15:41,406 INFO L175 Difference]: Start difference. First operand has 254 places, 287 transitions, 3534 flow. Second operand 10 states and 191 transitions. [2024-06-03 20:15:41,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 322 transitions, 4351 flow [2024-06-03 20:15:41,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 322 transitions, 4165 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:15:42,003 INFO L231 Difference]: Finished difference. Result has 258 places, 288 transitions, 3554 flow [2024-06-03 20:15:42,003 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3358, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3554, PETRI_PLACES=258, PETRI_TRANSITIONS=288} [2024-06-03 20:15:42,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-03 20:15:42,004 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 288 transitions, 3554 flow [2024-06-03 20:15:42,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:42,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:42,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:42,004 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:15:42,005 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:42,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:42,005 INFO L85 PathProgramCache]: Analyzing trace with hash -679284425, now seen corresponding path program 11 times [2024-06-03 20:15:42,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:42,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133097537] [2024-06-03 20:15:42,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:42,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:42,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:42,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:42,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:42,973 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133097537] [2024-06-03 20:15:42,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133097537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:42,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:42,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:42,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202734504] [2024-06-03 20:15:42,974 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:42,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:42,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:42,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:42,978 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:43,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:43,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 288 transitions, 3554 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:43,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:43,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:43,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:44,236 INFO L124 PetriNetUnfolderBase]: 2903/4694 cut-off events. [2024-06-03 20:15:44,236 INFO L125 PetriNetUnfolderBase]: For 433006/433006 co-relation queries the response was YES. [2024-06-03 20:15:44,275 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40962 conditions, 4694 events. 2903/4694 cut-off events. For 433006/433006 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 28410 event pairs, 666 based on Foata normal form. 12/4695 useless extension candidates. Maximal degree in co-relation 40838. Up to 3987 conditions per place. [2024-06-03 20:15:44,294 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 245 selfloop transitions, 78 changer transitions 0/328 dead transitions. [2024-06-03 20:15:44,295 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 328 transitions, 4633 flow [2024-06-03 20:15:44,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-03 20:15:44,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:15:44,296 INFO L175 Difference]: Start difference. First operand has 258 places, 288 transitions, 3554 flow. Second operand 10 states and 195 transitions. [2024-06-03 20:15:44,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 328 transitions, 4633 flow [2024-06-03 20:15:44,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 328 transitions, 4470 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:44,835 INFO L231 Difference]: Finished difference. Result has 260 places, 289 transitions, 3594 flow [2024-06-03 20:15:44,836 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3594, PETRI_PLACES=260, PETRI_TRANSITIONS=289} [2024-06-03 20:15:44,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 217 predicate places. [2024-06-03 20:15:44,838 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 289 transitions, 3594 flow [2024-06-03 20:15:44,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:44,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:44,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:44,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:15:44,838 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:44,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:44,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1724908283, now seen corresponding path program 12 times [2024-06-03 20:15:44,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:44,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1482762731] [2024-06-03 20:15:44,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:44,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:44,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:46,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:46,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:46,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1482762731] [2024-06-03 20:15:46,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1482762731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:46,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:46,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:46,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328228214] [2024-06-03 20:15:46,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:46,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:46,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:46,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:46,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:46,330 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:46,331 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 289 transitions, 3594 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:46,331 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:46,331 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:46,331 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:47,435 INFO L124 PetriNetUnfolderBase]: 2875/4654 cut-off events. [2024-06-03 20:15:47,435 INFO L125 PetriNetUnfolderBase]: For 427387/427387 co-relation queries the response was YES. [2024-06-03 20:15:47,473 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39911 conditions, 4654 events. 2875/4654 cut-off events. For 427387/427387 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 28170 event pairs, 656 based on Foata normal form. 16/4664 useless extension candidates. Maximal degree in co-relation 39786. Up to 4248 conditions per place. [2024-06-03 20:15:47,492 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 268 selfloop transitions, 51 changer transitions 0/324 dead transitions. [2024-06-03 20:15:47,492 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 324 transitions, 4374 flow [2024-06-03 20:15:47,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:47,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:47,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 20:15:47,493 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 20:15:47,493 INFO L175 Difference]: Start difference. First operand has 260 places, 289 transitions, 3594 flow. Second operand 10 states and 189 transitions. [2024-06-03 20:15:47,493 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 324 transitions, 4374 flow [2024-06-03 20:15:47,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 324 transitions, 4201 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:15:47,876 INFO L231 Difference]: Finished difference. Result has 263 places, 289 transitions, 3530 flow [2024-06-03 20:15:47,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3530, PETRI_PLACES=263, PETRI_TRANSITIONS=289} [2024-06-03 20:15:47,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-03 20:15:47,877 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 289 transitions, 3530 flow [2024-06-03 20:15:47,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:47,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:47,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:47,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:15:47,877 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:47,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:47,878 INFO L85 PathProgramCache]: Analyzing trace with hash -686902985, now seen corresponding path program 13 times [2024-06-03 20:15:47,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:47,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592380691] [2024-06-03 20:15:47,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:47,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:47,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:49,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:49,190 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:49,190 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592380691] [2024-06-03 20:15:49,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592380691] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:49,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:49,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:49,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829784292] [2024-06-03 20:15:49,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:49,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:49,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:49,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:49,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:49,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:49,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 289 transitions, 3530 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:49,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:49,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:49,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:50,416 INFO L124 PetriNetUnfolderBase]: 2847/4610 cut-off events. [2024-06-03 20:15:50,416 INFO L125 PetriNetUnfolderBase]: For 411823/411823 co-relation queries the response was YES. [2024-06-03 20:15:50,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38600 conditions, 4610 events. 2847/4610 cut-off events. For 411823/411823 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 27860 event pairs, 640 based on Foata normal form. 16/4620 useless extension candidates. Maximal degree in co-relation 38474. Up to 4204 conditions per place. [2024-06-03 20:15:50,465 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 267 selfloop transitions, 52 changer transitions 0/324 dead transitions. [2024-06-03 20:15:50,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 324 transitions, 4310 flow [2024-06-03 20:15:50,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:50,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:50,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:15:50,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:15:50,466 INFO L175 Difference]: Start difference. First operand has 263 places, 289 transitions, 3530 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:15:50,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 324 transitions, 4310 flow [2024-06-03 20:15:50,988 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 324 transitions, 4171 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:15:50,992 INFO L231 Difference]: Finished difference. Result has 265 places, 289 transitions, 3502 flow [2024-06-03 20:15:50,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3391, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3502, PETRI_PLACES=265, PETRI_TRANSITIONS=289} [2024-06-03 20:15:50,993 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-03 20:15:50,993 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 289 transitions, 3502 flow [2024-06-03 20:15:50,993 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:50,993 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:50,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:50,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:15:50,993 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:50,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:50,994 INFO L85 PathProgramCache]: Analyzing trace with hash 462240951, now seen corresponding path program 14 times [2024-06-03 20:15:50,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:50,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318203805] [2024-06-03 20:15:50,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:50,994 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:51,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:52,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:52,012 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:52,012 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318203805] [2024-06-03 20:15:52,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318203805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:52,012 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:52,012 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:52,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716916960] [2024-06-03 20:15:52,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:52,013 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:52,013 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:52,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:52,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:52,122 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:52,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 289 transitions, 3502 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:52,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:52,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:52,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:53,327 INFO L124 PetriNetUnfolderBase]: 2888/4677 cut-off events. [2024-06-03 20:15:53,328 INFO L125 PetriNetUnfolderBase]: For 415472/415472 co-relation queries the response was YES. [2024-06-03 20:15:53,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39021 conditions, 4677 events. 2888/4677 cut-off events. For 415472/415472 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28362 event pairs, 644 based on Foata normal form. 12/4678 useless extension candidates. Maximal degree in co-relation 38894. Up to 3949 conditions per place. [2024-06-03 20:15:53,374 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 215 selfloop transitions, 109 changer transitions 0/329 dead transitions. [2024-06-03 20:15:53,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 329 transitions, 4597 flow [2024-06-03 20:15:53,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:53,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:53,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 196 transitions. [2024-06-03 20:15:53,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-06-03 20:15:53,375 INFO L175 Difference]: Start difference. First operand has 265 places, 289 transitions, 3502 flow. Second operand 10 states and 196 transitions. [2024-06-03 20:15:53,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 329 transitions, 4597 flow [2024-06-03 20:15:53,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 329 transitions, 4469 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:15:53,903 INFO L231 Difference]: Finished difference. Result has 265 places, 290 transitions, 3639 flow [2024-06-03 20:15:53,904 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3374, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3639, PETRI_PLACES=265, PETRI_TRANSITIONS=290} [2024-06-03 20:15:53,904 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-03 20:15:53,904 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 290 transitions, 3639 flow [2024-06-03 20:15:53,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:53,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:53,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:53,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:15:53,905 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:53,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:53,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1978314771, now seen corresponding path program 15 times [2024-06-03 20:15:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85921476] [2024-06-03 20:15:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:53,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:54,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:54,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:54,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85921476] [2024-06-03 20:15:54,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85921476] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:54,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:54,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:15:54,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527433485] [2024-06-03 20:15:54,981 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:54,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:15:54,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:54,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:15:54,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:15:55,100 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:15:55,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 290 transitions, 3639 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:55,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:55,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:15:55,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:56,153 INFO L124 PetriNetUnfolderBase]: 2860/4633 cut-off events. [2024-06-03 20:15:56,153 INFO L125 PetriNetUnfolderBase]: For 409232/409232 co-relation queries the response was YES. [2024-06-03 20:15:56,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38114 conditions, 4633 events. 2860/4633 cut-off events. For 409232/409232 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 27988 event pairs, 637 based on Foata normal form. 16/4638 useless extension candidates. Maximal degree in co-relation 37987. Up to 4028 conditions per place. [2024-06-03 20:15:56,206 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 212 selfloop transitions, 107 changer transitions 0/324 dead transitions. [2024-06-03 20:15:56,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 324 transitions, 4413 flow [2024-06-03 20:15:56,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:15:56,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:15:56,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-03 20:15:56,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-03 20:15:56,208 INFO L175 Difference]: Start difference. First operand has 265 places, 290 transitions, 3639 flow. Second operand 10 states and 191 transitions. [2024-06-03 20:15:56,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 324 transitions, 4413 flow [2024-06-03 20:15:56,762 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 324 transitions, 4103 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-03 20:15:56,766 INFO L231 Difference]: Finished difference. Result has 266 places, 290 transitions, 3550 flow [2024-06-03 20:15:56,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3329, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3550, PETRI_PLACES=266, PETRI_TRANSITIONS=290} [2024-06-03 20:15:56,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-03 20:15:56,767 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 290 transitions, 3550 flow [2024-06-03 20:15:56,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:56,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:56,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:56,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:15:56,767 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:56,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:56,768 INFO L85 PathProgramCache]: Analyzing trace with hash -74979764, now seen corresponding path program 1 times [2024-06-03 20:15:56,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:56,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328210935] [2024-06-03 20:15:56,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:56,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:56,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:15:57,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:15:57,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:15:57,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328210935] [2024-06-03 20:15:57,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328210935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:15:57,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:15:57,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:15:57,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031303055] [2024-06-03 20:15:57,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:15:57,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:15:57,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:15:57,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:15:57,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:15:57,658 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:15:57,658 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 290 transitions, 3550 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:57,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:15:57,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:15:57,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:15:58,617 INFO L124 PetriNetUnfolderBase]: 2794/4593 cut-off events. [2024-06-03 20:15:58,617 INFO L125 PetriNetUnfolderBase]: For 401868/401882 co-relation queries the response was YES. [2024-06-03 20:15:58,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37747 conditions, 4593 events. 2794/4593 cut-off events. For 401868/401882 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28345 event pairs, 733 based on Foata normal form. 3/4583 useless extension candidates. Maximal degree in co-relation 37621. Up to 4218 conditions per place. [2024-06-03 20:15:58,671 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 258 selfloop transitions, 42 changer transitions 0/322 dead transitions. [2024-06-03 20:15:58,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 322 transitions, 4442 flow [2024-06-03 20:15:58,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:15:58,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:15:58,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 20:15:58,672 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 20:15:58,672 INFO L175 Difference]: Start difference. First operand has 266 places, 290 transitions, 3550 flow. Second operand 9 states and 175 transitions. [2024-06-03 20:15:58,672 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 322 transitions, 4442 flow [2024-06-03 20:15:59,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 322 transitions, 4205 flow, removed 4 selfloop flow, removed 10 redundant places. [2024-06-03 20:15:59,209 INFO L231 Difference]: Finished difference. Result has 265 places, 296 transitions, 3494 flow [2024-06-03 20:15:59,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=256, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3494, PETRI_PLACES=265, PETRI_TRANSITIONS=296} [2024-06-03 20:15:59,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-03 20:15:59,209 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 296 transitions, 3494 flow [2024-06-03 20:15:59,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:15:59,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:15:59,210 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:15:59,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:15:59,210 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:15:59,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:15:59,210 INFO L85 PathProgramCache]: Analyzing trace with hash -71170484, now seen corresponding path program 2 times [2024-06-03 20:15:59,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:15:59,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1087374313] [2024-06-03 20:15:59,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:15:59,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:15:59,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:00,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:00,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:00,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1087374313] [2024-06-03 20:16:00,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1087374313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:00,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:00,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:00,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785004485] [2024-06-03 20:16:00,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:00,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:00,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:00,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:00,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:00,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:16:00,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 296 transitions, 3494 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:00,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:00,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:16:00,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:01,147 INFO L124 PetriNetUnfolderBase]: 2795/4598 cut-off events. [2024-06-03 20:16:01,147 INFO L125 PetriNetUnfolderBase]: For 411737/411751 co-relation queries the response was YES. [2024-06-03 20:16:01,185 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37963 conditions, 4598 events. 2795/4598 cut-off events. For 411737/411751 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 28507 event pairs, 734 based on Foata normal form. 2/4588 useless extension candidates. Maximal degree in co-relation 37837. Up to 4276 conditions per place. [2024-06-03 20:16:01,204 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 265 selfloop transitions, 33 changer transitions 0/320 dead transitions. [2024-06-03 20:16:01,204 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 272 places, 320 transitions, 4370 flow [2024-06-03 20:16:01,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:01,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-03 20:16:01,205 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:16:01,205 INFO L175 Difference]: Start difference. First operand has 265 places, 296 transitions, 3494 flow. Second operand 8 states and 152 transitions. [2024-06-03 20:16:01,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 272 places, 320 transitions, 4370 flow [2024-06-03 20:16:01,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 320 transitions, 4275 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:16:01,867 INFO L231 Difference]: Finished difference. Result has 269 places, 302 transitions, 3594 flow [2024-06-03 20:16:01,867 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3407, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3594, PETRI_PLACES=269, PETRI_TRANSITIONS=302} [2024-06-03 20:16:01,868 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 226 predicate places. [2024-06-03 20:16:01,868 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 302 transitions, 3594 flow [2024-06-03 20:16:01,868 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:01,868 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:01,868 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:01,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:16:01,868 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:01,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:01,869 INFO L85 PathProgramCache]: Analyzing trace with hash -730172946, now seen corresponding path program 3 times [2024-06-03 20:16:01,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:01,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20634667] [2024-06-03 20:16:01,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:01,869 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:01,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:02,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:02,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:02,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20634667] [2024-06-03 20:16:02,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [20634667] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:02,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:02,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:02,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315714099] [2024-06-03 20:16:02,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:02,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:02,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:02,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:02,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:02,692 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:16:02,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 302 transitions, 3594 flow. Second operand has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:02,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:02,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:16:02,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:03,649 INFO L124 PetriNetUnfolderBase]: 2793/4595 cut-off events. [2024-06-03 20:16:03,649 INFO L125 PetriNetUnfolderBase]: For 416541/416543 co-relation queries the response was YES. [2024-06-03 20:16:03,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38059 conditions, 4595 events. 2793/4595 cut-off events. For 416541/416543 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28455 event pairs, 734 based on Foata normal form. 4/4587 useless extension candidates. Maximal degree in co-relation 37930. Up to 4249 conditions per place. [2024-06-03 20:16:03,709 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 269 selfloop transitions, 40 changer transitions 0/331 dead transitions. [2024-06-03 20:16:03,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 331 transitions, 4660 flow [2024-06-03 20:16:03,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:16:03,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:16:03,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-03 20:16:03,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4931972789115646 [2024-06-03 20:16:03,724 INFO L175 Difference]: Start difference. First operand has 269 places, 302 transitions, 3594 flow. Second operand 7 states and 145 transitions. [2024-06-03 20:16:03,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 331 transitions, 4660 flow [2024-06-03 20:16:04,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 331 transitions, 4561 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 20:16:04,421 INFO L231 Difference]: Finished difference. Result has 272 places, 308 transitions, 3724 flow [2024-06-03 20:16:04,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3495, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3724, PETRI_PLACES=272, PETRI_TRANSITIONS=308} [2024-06-03 20:16:04,424 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 229 predicate places. [2024-06-03 20:16:04,424 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 308 transitions, 3724 flow [2024-06-03 20:16:04,424 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.777777777777779) internal successors, (115), 9 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:04,424 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:04,424 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:04,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:16:04,424 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:04,425 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:04,425 INFO L85 PathProgramCache]: Analyzing trace with hash -1014653934, now seen corresponding path program 1 times [2024-06-03 20:16:04,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:04,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833885240] [2024-06-03 20:16:04,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:04,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:05,205 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:05,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:05,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833885240] [2024-06-03 20:16:05,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833885240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:05,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:05,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:05,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935559104] [2024-06-03 20:16:05,206 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:05,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:05,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:05,206 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:05,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:05,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:05,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 308 transitions, 3724 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:05,275 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:05,275 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:05,275 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:06,167 INFO L124 PetriNetUnfolderBase]: 2885/4686 cut-off events. [2024-06-03 20:16:06,167 INFO L125 PetriNetUnfolderBase]: For 415958/415958 co-relation queries the response was YES. [2024-06-03 20:16:06,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38983 conditions, 4686 events. 2885/4686 cut-off events. For 415958/415958 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 28547 event pairs, 788 based on Foata normal form. 1/4685 useless extension candidates. Maximal degree in co-relation 38852. Up to 4478 conditions per place. [2024-06-03 20:16:06,225 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 288 selfloop transitions, 26 changer transitions 0/319 dead transitions. [2024-06-03 20:16:06,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 319 transitions, 4386 flow [2024-06-03 20:16:06,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:16:06,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:16:06,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-06-03 20:16:06,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2024-06-03 20:16:06,227 INFO L175 Difference]: Start difference. First operand has 272 places, 308 transitions, 3724 flow. Second operand 5 states and 101 transitions. [2024-06-03 20:16:06,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 319 transitions, 4386 flow [2024-06-03 20:16:06,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 319 transitions, 4285 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-03 20:16:06,891 INFO L231 Difference]: Finished difference. Result has 274 places, 308 transitions, 3696 flow [2024-06-03 20:16:06,891 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3623, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3696, PETRI_PLACES=274, PETRI_TRANSITIONS=308} [2024-06-03 20:16:06,892 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-03 20:16:06,892 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 308 transitions, 3696 flow [2024-06-03 20:16:06,892 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:06,892 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:06,892 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:06,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:16:06,893 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:06,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:06,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1745758595, now seen corresponding path program 1 times [2024-06-03 20:16:06,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:06,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010799908] [2024-06-03 20:16:06,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:06,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:06,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:08,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:08,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:08,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010799908] [2024-06-03 20:16:08,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010799908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:08,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:08,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:08,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44944544] [2024-06-03 20:16:08,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:08,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:08,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:08,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:08,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:08,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:08,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 308 transitions, 3696 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:08,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:08,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:08,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:09,275 INFO L124 PetriNetUnfolderBase]: 2926/4757 cut-off events. [2024-06-03 20:16:09,277 INFO L125 PetriNetUnfolderBase]: For 447626/447626 co-relation queries the response was YES. [2024-06-03 20:16:09,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39564 conditions, 4757 events. 2926/4757 cut-off events. For 447626/447626 co-relation queries the response was YES. Maximal size of possible extension queue 306. Compared 29106 event pairs, 631 based on Foata normal form. 12/4767 useless extension candidates. Maximal degree in co-relation 39431. Up to 4433 conditions per place. [2024-06-03 20:16:09,339 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 312 selfloop transitions, 29 changer transitions 0/346 dead transitions. [2024-06-03 20:16:09,339 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 346 transitions, 4538 flow [2024-06-03 20:16:09,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:09,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:09,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 20:16:09,340 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-03 20:16:09,341 INFO L175 Difference]: Start difference. First operand has 274 places, 308 transitions, 3696 flow. Second operand 10 states and 187 transitions. [2024-06-03 20:16:09,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 346 transitions, 4538 flow [2024-06-03 20:16:10,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 346 transitions, 4486 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:10,039 INFO L231 Difference]: Finished difference. Result has 280 places, 309 transitions, 3742 flow [2024-06-03 20:16:10,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3644, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3742, PETRI_PLACES=280, PETRI_TRANSITIONS=309} [2024-06-03 20:16:10,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-03 20:16:10,040 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 309 transitions, 3742 flow [2024-06-03 20:16:10,040 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:10,040 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:10,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:10,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:16:10,040 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:10,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:10,041 INFO L85 PathProgramCache]: Analyzing trace with hash -303957505, now seen corresponding path program 2 times [2024-06-03 20:16:10,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:10,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773705534] [2024-06-03 20:16:10,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:10,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:10,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:11,582 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:11,582 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:11,582 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773705534] [2024-06-03 20:16:11,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773705534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:11,583 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:11,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:11,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787034480] [2024-06-03 20:16:11,583 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:11,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:11,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:11,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:11,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:11,709 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:11,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 309 transitions, 3742 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:11,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:11,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:11,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:12,892 INFO L124 PetriNetUnfolderBase]: 2967/4826 cut-off events. [2024-06-03 20:16:12,892 INFO L125 PetriNetUnfolderBase]: For 463289/463289 co-relation queries the response was YES. [2024-06-03 20:16:12,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40333 conditions, 4826 events. 2967/4826 cut-off events. For 463289/463289 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 29666 event pairs, 633 based on Foata normal form. 12/4836 useless extension candidates. Maximal degree in co-relation 40199. Up to 4171 conditions per place. [2024-06-03 20:16:12,952 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 291 selfloop transitions, 58 changer transitions 0/354 dead transitions. [2024-06-03 20:16:12,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 354 transitions, 4670 flow [2024-06-03 20:16:12,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:16:12,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:16:12,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 210 transitions. [2024-06-03 20:16:12,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-03 20:16:12,954 INFO L175 Difference]: Start difference. First operand has 280 places, 309 transitions, 3742 flow. Second operand 11 states and 210 transitions. [2024-06-03 20:16:12,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 354 transitions, 4670 flow [2024-06-03 20:16:13,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 354 transitions, 4596 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:13,782 INFO L231 Difference]: Finished difference. Result has 283 places, 310 transitions, 3838 flow [2024-06-03 20:16:13,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3668, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3838, PETRI_PLACES=283, PETRI_TRANSITIONS=310} [2024-06-03 20:16:13,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 240 predicate places. [2024-06-03 20:16:13,782 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 310 transitions, 3838 flow [2024-06-03 20:16:13,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:13,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:13,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:13,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:16:13,783 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:13,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:13,783 INFO L85 PathProgramCache]: Analyzing trace with hash 174335699, now seen corresponding path program 3 times [2024-06-03 20:16:13,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:13,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1463986173] [2024-06-03 20:16:13,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:13,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:13,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:14,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:14,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:14,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1463986173] [2024-06-03 20:16:14,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1463986173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:14,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:14,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:14,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788329831] [2024-06-03 20:16:14,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:14,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:14,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:14,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:14,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:14,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:14,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 310 transitions, 3838 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:14,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:14,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:14,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:16,106 INFO L124 PetriNetUnfolderBase]: 2947/4796 cut-off events. [2024-06-03 20:16:16,106 INFO L125 PetriNetUnfolderBase]: For 450336/450336 co-relation queries the response was YES. [2024-06-03 20:16:16,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39623 conditions, 4796 events. 2947/4796 cut-off events. For 450336/450336 co-relation queries the response was YES. Maximal size of possible extension queue 310. Compared 29458 event pairs, 632 based on Foata normal form. 12/4806 useless extension candidates. Maximal degree in co-relation 39488. Up to 4472 conditions per place. [2024-06-03 20:16:16,165 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 313 selfloop transitions, 29 changer transitions 0/347 dead transitions. [2024-06-03 20:16:16,166 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 347 transitions, 4650 flow [2024-06-03 20:16:16,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:16,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:16,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 20:16:16,167 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-03 20:16:16,167 INFO L175 Difference]: Start difference. First operand has 283 places, 310 transitions, 3838 flow. Second operand 10 states and 187 transitions. [2024-06-03 20:16:16,167 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 347 transitions, 4650 flow [2024-06-03 20:16:16,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 347 transitions, 4500 flow, removed 18 selfloop flow, removed 9 redundant places. [2024-06-03 20:16:16,844 INFO L231 Difference]: Finished difference. Result has 284 places, 310 transitions, 3752 flow [2024-06-03 20:16:16,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3688, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=281, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3752, PETRI_PLACES=284, PETRI_TRANSITIONS=310} [2024-06-03 20:16:16,845 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 241 predicate places. [2024-06-03 20:16:16,845 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 310 transitions, 3752 flow [2024-06-03 20:16:16,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:16,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:16,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:16,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:16:16,846 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:16,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:16,846 INFO L85 PathProgramCache]: Analyzing trace with hash 1854388735, now seen corresponding path program 4 times [2024-06-03 20:16:16,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:16,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637487069] [2024-06-03 20:16:16,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:16,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:16,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:17,879 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:17,879 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:17,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637487069] [2024-06-03 20:16:17,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637487069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:17,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:17,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:17,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879420768] [2024-06-03 20:16:17,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:17,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:17,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:17,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:17,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:18,012 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:18,013 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 310 transitions, 3752 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:18,013 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:18,013 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:18,013 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:19,143 INFO L124 PetriNetUnfolderBase]: 2988/4867 cut-off events. [2024-06-03 20:16:19,144 INFO L125 PetriNetUnfolderBase]: For 462975/462975 co-relation queries the response was YES. [2024-06-03 20:16:19,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39959 conditions, 4867 events. 2988/4867 cut-off events. For 462975/462975 co-relation queries the response was YES. Maximal size of possible extension queue 315. Compared 29932 event pairs, 542 based on Foata normal form. 12/4877 useless extension candidates. Maximal degree in co-relation 39823. Up to 4492 conditions per place. [2024-06-03 20:16:19,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 28 changer transitions 0/352 dead transitions. [2024-06-03 20:16:19,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 352 transitions, 4632 flow [2024-06-03 20:16:19,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:19,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:19,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:16:19,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:16:19,202 INFO L175 Difference]: Start difference. First operand has 284 places, 310 transitions, 3752 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:16:19,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 352 transitions, 4632 flow [2024-06-03 20:16:19,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 352 transitions, 4544 flow, removed 7 selfloop flow, removed 9 redundant places. [2024-06-03 20:16:19,998 INFO L231 Difference]: Finished difference. Result has 285 places, 311 transitions, 3776 flow [2024-06-03 20:16:19,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3664, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=310, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=282, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3776, PETRI_PLACES=285, PETRI_TRANSITIONS=311} [2024-06-03 20:16:19,998 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-03 20:16:19,999 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 311 transitions, 3776 flow [2024-06-03 20:16:19,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:19,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:19,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:19,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:16:19,999 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:19,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:19,999 INFO L85 PathProgramCache]: Analyzing trace with hash 304959999, now seen corresponding path program 5 times [2024-06-03 20:16:20,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:20,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265345656] [2024-06-03 20:16:20,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:20,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:20,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:21,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:21,422 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:21,422 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265345656] [2024-06-03 20:16:21,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265345656] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:21,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:21,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:21,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201212399] [2024-06-03 20:16:21,423 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:21,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:21,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:21,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:21,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:21,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:21,531 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 311 transitions, 3776 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:21,531 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:21,531 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:21,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:22,801 INFO L124 PetriNetUnfolderBase]: 3029/4938 cut-off events. [2024-06-03 20:16:22,801 INFO L125 PetriNetUnfolderBase]: For 479828/479828 co-relation queries the response was YES. [2024-06-03 20:16:22,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40584 conditions, 4938 events. 3029/4938 cut-off events. For 479828/479828 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 30598 event pairs, 634 based on Foata normal form. 12/4948 useless extension candidates. Maximal degree in co-relation 40447. Up to 4541 conditions per place. [2024-06-03 20:16:22,857 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 309 selfloop transitions, 38 changer transitions 0/352 dead transitions. [2024-06-03 20:16:22,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 352 transitions, 4656 flow [2024-06-03 20:16:22,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 190 transitions. [2024-06-03 20:16:22,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:16:22,859 INFO L175 Difference]: Start difference. First operand has 285 places, 311 transitions, 3776 flow. Second operand 10 states and 190 transitions. [2024-06-03 20:16:22,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 352 transitions, 4656 flow [2024-06-03 20:16:23,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 352 transitions, 4570 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:23,730 INFO L231 Difference]: Finished difference. Result has 287 places, 312 transitions, 3824 flow [2024-06-03 20:16:23,730 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=273, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3824, PETRI_PLACES=287, PETRI_TRANSITIONS=312} [2024-06-03 20:16:23,730 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 244 predicate places. [2024-06-03 20:16:23,730 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 312 transitions, 3824 flow [2024-06-03 20:16:23,730 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:23,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:23,731 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:23,731 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:16:23,731 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:23,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:23,732 INFO L85 PathProgramCache]: Analyzing trace with hash 309543969, now seen corresponding path program 6 times [2024-06-03 20:16:23,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:23,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891309404] [2024-06-03 20:16:23,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:23,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:23,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:25,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:25,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:25,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891309404] [2024-06-03 20:16:25,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891309404] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:25,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:25,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:25,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123741733] [2024-06-03 20:16:25,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:25,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:25,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:25,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:25,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:25,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:25,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 312 transitions, 3824 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:25,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:25,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:25,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:26,542 INFO L124 PetriNetUnfolderBase]: 3070/5009 cut-off events. [2024-06-03 20:16:26,542 INFO L125 PetriNetUnfolderBase]: For 491850/491850 co-relation queries the response was YES. [2024-06-03 20:16:26,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41182 conditions, 5009 events. 3070/5009 cut-off events. For 491850/491850 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 31039 event pairs, 669 based on Foata normal form. 12/5019 useless extension candidates. Maximal degree in co-relation 41044. Up to 4658 conditions per place. [2024-06-03 20:16:26,602 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 311 selfloop transitions, 36 changer transitions 0/352 dead transitions. [2024-06-03 20:16:26,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 352 transitions, 4704 flow [2024-06-03 20:16:26,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:26,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:26,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:16:26,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:16:26,604 INFO L175 Difference]: Start difference. First operand has 287 places, 312 transitions, 3824 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:16:26,604 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 352 transitions, 4704 flow [2024-06-03 20:16:27,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 352 transitions, 4596 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:27,541 INFO L231 Difference]: Finished difference. Result has 289 places, 313 transitions, 3848 flow [2024-06-03 20:16:27,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3716, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=312, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3848, PETRI_PLACES=289, PETRI_TRANSITIONS=313} [2024-06-03 20:16:27,542 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-03 20:16:27,542 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 313 transitions, 3848 flow [2024-06-03 20:16:27,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:27,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:27,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:27,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:16:27,542 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:27,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:27,543 INFO L85 PathProgramCache]: Analyzing trace with hash 679041157, now seen corresponding path program 1 times [2024-06-03 20:16:27,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:27,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525361184] [2024-06-03 20:16:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:27,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:27,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525361184] [2024-06-03 20:16:28,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1525361184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:28,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:28,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:28,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306077473] [2024-06-03 20:16:28,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:28,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:28,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:28,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:28,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:28,315 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:28,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 313 transitions, 3848 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:28,316 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:28,316 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:28,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:29,372 INFO L124 PetriNetUnfolderBase]: 3096/5045 cut-off events. [2024-06-03 20:16:29,372 INFO L125 PetriNetUnfolderBase]: For 486239/486239 co-relation queries the response was YES. [2024-06-03 20:16:29,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41707 conditions, 5045 events. 3096/5045 cut-off events. For 486239/486239 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 31329 event pairs, 686 based on Foata normal form. 2/5045 useless extension candidates. Maximal degree in co-relation 41568. Up to 4764 conditions per place. [2024-06-03 20:16:29,436 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 300 selfloop transitions, 39 changer transitions 0/344 dead transitions. [2024-06-03 20:16:29,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 344 transitions, 4928 flow [2024-06-03 20:16:29,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:29,437 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:29,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 20:16:29,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 20:16:29,437 INFO L175 Difference]: Start difference. First operand has 289 places, 313 transitions, 3848 flow. Second operand 8 states and 154 transitions. [2024-06-03 20:16:29,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 344 transitions, 4928 flow [2024-06-03 20:16:30,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 344 transitions, 4822 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-03 20:16:30,401 INFO L231 Difference]: Finished difference. Result has 289 places, 319 transitions, 3986 flow [2024-06-03 20:16:30,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3742, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=277, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3986, PETRI_PLACES=289, PETRI_TRANSITIONS=319} [2024-06-03 20:16:30,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-03 20:16:30,402 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 319 transitions, 3986 flow [2024-06-03 20:16:30,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:30,402 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:30,402 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:30,402 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:16:30,403 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:30,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:30,403 INFO L85 PathProgramCache]: Analyzing trace with hash 679161127, now seen corresponding path program 2 times [2024-06-03 20:16:30,403 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:30,403 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560586626] [2024-06-03 20:16:30,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:30,403 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:30,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:31,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:31,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:31,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560586626] [2024-06-03 20:16:31,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [560586626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:31,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:31,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:31,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [756536721] [2024-06-03 20:16:31,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:31,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:31,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:31,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:31,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:31,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:31,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 319 transitions, 3986 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:31,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:31,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:31,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:32,356 INFO L124 PetriNetUnfolderBase]: 3116/5077 cut-off events. [2024-06-03 20:16:32,356 INFO L125 PetriNetUnfolderBase]: For 498329/498329 co-relation queries the response was YES. [2024-06-03 20:16:32,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42253 conditions, 5077 events. 3116/5077 cut-off events. For 498329/498329 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 31608 event pairs, 687 based on Foata normal form. 2/5077 useless extension candidates. Maximal degree in co-relation 42113. Up to 4828 conditions per place. [2024-06-03 20:16:32,430 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 308 selfloop transitions, 35 changer transitions 0/348 dead transitions. [2024-06-03 20:16:32,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 348 transitions, 4890 flow [2024-06-03 20:16:32,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:32,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:32,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-03 20:16:32,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-03 20:16:32,432 INFO L175 Difference]: Start difference. First operand has 289 places, 319 transitions, 3986 flow. Second operand 8 states and 149 transitions. [2024-06-03 20:16:32,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 348 transitions, 4890 flow [2024-06-03 20:16:33,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 348 transitions, 4759 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:33,482 INFO L231 Difference]: Finished difference. Result has 293 places, 327 transitions, 4075 flow [2024-06-03 20:16:33,483 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3872, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4075, PETRI_PLACES=293, PETRI_TRANSITIONS=327} [2024-06-03 20:16:33,483 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-03 20:16:33,483 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 327 transitions, 4075 flow [2024-06-03 20:16:33,483 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:33,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:33,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:33,484 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:16:33,484 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:33,484 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:33,484 INFO L85 PathProgramCache]: Analyzing trace with hash 619572255, now seen corresponding path program 1 times [2024-06-03 20:16:33,484 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:33,484 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215677715] [2024-06-03 20:16:33,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:33,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:33,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:34,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:34,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:34,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215677715] [2024-06-03 20:16:34,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215677715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:34,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:34,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:34,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621211207] [2024-06-03 20:16:34,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:34,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:34,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:34,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:34,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:34,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:34,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 327 transitions, 4075 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:34,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:34,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:34,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:35,217 INFO L124 PetriNetUnfolderBase]: 3168/5151 cut-off events. [2024-06-03 20:16:35,217 INFO L125 PetriNetUnfolderBase]: For 527698/527698 co-relation queries the response was YES. [2024-06-03 20:16:35,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43244 conditions, 5151 events. 3168/5151 cut-off events. For 527698/527698 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 32047 event pairs, 690 based on Foata normal form. 4/5153 useless extension candidates. Maximal degree in co-relation 43102. Up to 4850 conditions per place. [2024-06-03 20:16:35,282 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 317 selfloop transitions, 41 changer transitions 0/363 dead transitions. [2024-06-03 20:16:35,282 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 363 transitions, 5218 flow [2024-06-03 20:16:35,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:35,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:35,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 20:16:35,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-03 20:16:35,283 INFO L175 Difference]: Start difference. First operand has 293 places, 327 transitions, 4075 flow. Second operand 8 states and 155 transitions. [2024-06-03 20:16:35,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 363 transitions, 5218 flow [2024-06-03 20:16:36,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 363 transitions, 5110 flow, removed 32 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:36,208 INFO L231 Difference]: Finished difference. Result has 298 places, 338 transitions, 4256 flow [2024-06-03 20:16:36,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4256, PETRI_PLACES=298, PETRI_TRANSITIONS=338} [2024-06-03 20:16:36,209 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 255 predicate places. [2024-06-03 20:16:36,209 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 338 transitions, 4256 flow [2024-06-03 20:16:36,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:36,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:36,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:36,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:16:36,210 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:36,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:36,210 INFO L85 PathProgramCache]: Analyzing trace with hash 796703589, now seen corresponding path program 3 times [2024-06-03 20:16:36,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:36,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817911152] [2024-06-03 20:16:36,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:36,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:36,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:36,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:36,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:36,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817911152] [2024-06-03 20:16:36,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817911152] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:36,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:36,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:36,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1389931812] [2024-06-03 20:16:36,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:36,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:36,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:36,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:36,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:36,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:36,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 338 transitions, 4256 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:36,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:36,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:36,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:38,149 INFO L124 PetriNetUnfolderBase]: 3188/5187 cut-off events. [2024-06-03 20:16:38,150 INFO L125 PetriNetUnfolderBase]: For 537967/537967 co-relation queries the response was YES. [2024-06-03 20:16:38,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44262 conditions, 5187 events. 3188/5187 cut-off events. For 537967/537967 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 32415 event pairs, 688 based on Foata normal form. 2/5187 useless extension candidates. Maximal degree in co-relation 44118. Up to 4961 conditions per place. [2024-06-03 20:16:38,214 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 332 selfloop transitions, 28 changer transitions 0/365 dead transitions. [2024-06-03 20:16:38,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 365 transitions, 5198 flow [2024-06-03 20:16:38,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:38,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:38,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:16:38,216 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:16:38,216 INFO L175 Difference]: Start difference. First operand has 298 places, 338 transitions, 4256 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:16:38,216 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 365 transitions, 5198 flow [2024-06-03 20:16:39,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 365 transitions, 5093 flow, removed 44 selfloop flow, removed 3 redundant places. [2024-06-03 20:16:39,149 INFO L231 Difference]: Finished difference. Result has 304 places, 347 transitions, 4387 flow [2024-06-03 20:16:39,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4153, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=338, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4387, PETRI_PLACES=304, PETRI_TRANSITIONS=347} [2024-06-03 20:16:39,149 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 261 predicate places. [2024-06-03 20:16:39,149 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 347 transitions, 4387 flow [2024-06-03 20:16:39,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:39,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:39,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:39,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:16:39,150 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:39,150 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:39,150 INFO L85 PathProgramCache]: Analyzing trace with hash 796703775, now seen corresponding path program 2 times [2024-06-03 20:16:39,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:39,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928005300] [2024-06-03 20:16:39,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:39,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:39,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:39,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:39,834 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:39,834 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928005300] [2024-06-03 20:16:39,834 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928005300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:39,834 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:39,834 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:39,834 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470925829] [2024-06-03 20:16:39,834 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:39,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:39,835 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:39,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:39,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:39,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:39,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 347 transitions, 4387 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:39,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:39,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:39,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:41,026 INFO L124 PetriNetUnfolderBase]: 3240/5265 cut-off events. [2024-06-03 20:16:41,026 INFO L125 PetriNetUnfolderBase]: For 565721/565721 co-relation queries the response was YES. [2024-06-03 20:16:41,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45087 conditions, 5265 events. 3240/5265 cut-off events. For 565721/565721 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 32878 event pairs, 695 based on Foata normal form. 4/5267 useless extension candidates. Maximal degree in co-relation 44940. Up to 4991 conditions per place. [2024-06-03 20:16:41,098 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 334 selfloop transitions, 38 changer transitions 0/377 dead transitions. [2024-06-03 20:16:41,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 377 transitions, 5514 flow [2024-06-03 20:16:41,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:41,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:16:41,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-03 20:16:41,099 INFO L175 Difference]: Start difference. First operand has 304 places, 347 transitions, 4387 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:16:41,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 377 transitions, 5514 flow [2024-06-03 20:16:42,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 377 transitions, 5397 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 20:16:42,486 INFO L231 Difference]: Finished difference. Result has 308 places, 355 transitions, 4485 flow [2024-06-03 20:16:42,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4270, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4485, PETRI_PLACES=308, PETRI_TRANSITIONS=355} [2024-06-03 20:16:42,487 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 265 predicate places. [2024-06-03 20:16:42,487 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 355 transitions, 4485 flow [2024-06-03 20:16:42,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:42,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:42,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:42,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:16:42,487 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:42,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:42,488 INFO L85 PathProgramCache]: Analyzing trace with hash 856529983, now seen corresponding path program 3 times [2024-06-03 20:16:42,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:42,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793441565] [2024-06-03 20:16:42,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:42,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:42,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:43,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:43,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:43,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793441565] [2024-06-03 20:16:43,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793441565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:43,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:43,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:43,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138890447] [2024-06-03 20:16:43,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:43,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:43,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:43,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:43,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:43,230 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:43,230 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 355 transitions, 4485 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:43,230 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:43,230 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:43,230 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:44,390 INFO L124 PetriNetUnfolderBase]: 3228/5245 cut-off events. [2024-06-03 20:16:44,390 INFO L125 PetriNetUnfolderBase]: For 564903/564903 co-relation queries the response was YES. [2024-06-03 20:16:44,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44777 conditions, 5245 events. 3228/5245 cut-off events. For 564903/564903 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 32709 event pairs, 691 based on Foata normal form. 4/5247 useless extension candidates. Maximal degree in co-relation 44629. Up to 5005 conditions per place. [2024-06-03 20:16:44,466 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 337 selfloop transitions, 31 changer transitions 0/373 dead transitions. [2024-06-03 20:16:44,466 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 373 transitions, 5291 flow [2024-06-03 20:16:44,467 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:44,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:44,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:16:44,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:16:44,467 INFO L175 Difference]: Start difference. First operand has 308 places, 355 transitions, 4485 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:16:44,468 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 373 transitions, 5291 flow [2024-06-03 20:16:45,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 373 transitions, 5178 flow, removed 42 selfloop flow, removed 3 redundant places. [2024-06-03 20:16:45,717 INFO L231 Difference]: Finished difference. Result has 313 places, 355 transitions, 4440 flow [2024-06-03 20:16:45,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4372, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4440, PETRI_PLACES=313, PETRI_TRANSITIONS=355} [2024-06-03 20:16:45,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 270 predicate places. [2024-06-03 20:16:45,718 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 355 transitions, 4440 flow [2024-06-03 20:16:45,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:45,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:45,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:45,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:16:45,718 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:45,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:45,718 INFO L85 PathProgramCache]: Analyzing trace with hash 856538911, now seen corresponding path program 1 times [2024-06-03 20:16:45,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:45,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050444072] [2024-06-03 20:16:45,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:45,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:45,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:46,612 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:46,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:46,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050444072] [2024-06-03 20:16:46,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050444072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:46,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:46,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:16:46,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480713036] [2024-06-03 20:16:46,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:46,613 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:16:46,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:16:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:16:46,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:46,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 355 transitions, 4440 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:16:46,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:46,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:46,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:47,952 INFO L124 PetriNetUnfolderBase]: 3272/5313 cut-off events. [2024-06-03 20:16:47,953 INFO L125 PetriNetUnfolderBase]: For 601139/601139 co-relation queries the response was YES. [2024-06-03 20:16:48,003 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45181 conditions, 5313 events. 3272/5313 cut-off events. For 601139/601139 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 33179 event pairs, 700 based on Foata normal form. 12/5323 useless extension candidates. Maximal degree in co-relation 45031. Up to 4950 conditions per place. [2024-06-03 20:16:48,023 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 331 selfloop transitions, 45 changer transitions 0/381 dead transitions. [2024-06-03 20:16:48,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 381 transitions, 5364 flow [2024-06-03 20:16:48,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:16:48,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:16:48,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 20:16:48,024 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 20:16:48,024 INFO L175 Difference]: Start difference. First operand has 313 places, 355 transitions, 4440 flow. Second operand 8 states and 154 transitions. [2024-06-03 20:16:48,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 381 transitions, 5364 flow [2024-06-03 20:16:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 381 transitions, 5285 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:16:49,214 INFO L231 Difference]: Finished difference. Result has 314 places, 356 transitions, 4470 flow [2024-06-03 20:16:49,214 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4361, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4470, PETRI_PLACES=314, PETRI_TRANSITIONS=356} [2024-06-03 20:16:49,215 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-03 20:16:49,215 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 356 transitions, 4470 flow [2024-06-03 20:16:49,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:16:49,215 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:49,215 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:49,215 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:16:49,215 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:49,216 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:49,216 INFO L85 PathProgramCache]: Analyzing trace with hash -2033835539, now seen corresponding path program 7 times [2024-06-03 20:16:49,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:49,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580864517] [2024-06-03 20:16:49,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:49,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:49,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:50,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:50,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:50,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580864517] [2024-06-03 20:16:50,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580864517] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:50,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:50,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:50,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308183079] [2024-06-03 20:16:50,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:50,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:50,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:50,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:50,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:50,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:50,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 356 transitions, 4470 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:50,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:50,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:50,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:51,748 INFO L124 PetriNetUnfolderBase]: 3252/5282 cut-off events. [2024-06-03 20:16:51,749 INFO L125 PetriNetUnfolderBase]: For 576058/576058 co-relation queries the response was YES. [2024-06-03 20:16:51,801 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44355 conditions, 5282 events. 3252/5282 cut-off events. For 576058/576058 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 33030 event pairs, 679 based on Foata normal form. 12/5288 useless extension candidates. Maximal degree in co-relation 44204. Up to 4860 conditions per place. [2024-06-03 20:16:51,822 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 51 changer transitions 0/391 dead transitions. [2024-06-03 20:16:51,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 391 transitions, 5364 flow [2024-06-03 20:16:51,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:51,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 20:16:51,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-03 20:16:51,825 INFO L175 Difference]: Start difference. First operand has 314 places, 356 transitions, 4470 flow. Second operand 10 states and 187 transitions. [2024-06-03 20:16:51,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 391 transitions, 5364 flow [2024-06-03 20:16:53,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 391 transitions, 5273 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:16:53,244 INFO L231 Difference]: Finished difference. Result has 318 places, 356 transitions, 4487 flow [2024-06-03 20:16:53,244 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=305, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4487, PETRI_PLACES=318, PETRI_TRANSITIONS=356} [2024-06-03 20:16:53,244 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-03 20:16:53,245 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 356 transitions, 4487 flow [2024-06-03 20:16:53,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:53,245 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:53,245 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:53,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:16:53,245 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:53,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1601257931, now seen corresponding path program 8 times [2024-06-03 20:16:53,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:53,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70730824] [2024-06-03 20:16:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:53,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:53,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:54,570 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:54,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:54,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70730824] [2024-06-03 20:16:54,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70730824] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:54,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:54,571 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:54,571 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668198822] [2024-06-03 20:16:54,571 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:54,571 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:54,571 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:54,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:54,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:54,651 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:54,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 356 transitions, 4487 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:54,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:54,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:54,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:55,927 INFO L124 PetriNetUnfolderBase]: 3293/5351 cut-off events. [2024-06-03 20:16:55,928 INFO L125 PetriNetUnfolderBase]: For 591291/591291 co-relation queries the response was YES. [2024-06-03 20:16:55,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45005 conditions, 5351 events. 3293/5351 cut-off events. For 591291/591291 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 33552 event pairs, 688 based on Foata normal form. 12/5357 useless extension candidates. Maximal degree in co-relation 44853. Up to 4931 conditions per place. [2024-06-03 20:16:56,017 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 338 selfloop transitions, 49 changer transitions 0/392 dead transitions. [2024-06-03 20:16:56,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 392 transitions, 5424 flow [2024-06-03 20:16:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:16:56,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:16:56,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 189 transitions. [2024-06-03 20:16:56,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45 [2024-06-03 20:16:56,019 INFO L175 Difference]: Start difference. First operand has 318 places, 356 transitions, 4487 flow. Second operand 10 states and 189 transitions. [2024-06-03 20:16:56,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 392 transitions, 5424 flow [2024-06-03 20:16:57,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 392 transitions, 5258 flow, removed 15 selfloop flow, removed 10 redundant places. [2024-06-03 20:16:57,301 INFO L231 Difference]: Finished difference. Result has 318 places, 357 transitions, 4468 flow [2024-06-03 20:16:57,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4322, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4468, PETRI_PLACES=318, PETRI_TRANSITIONS=357} [2024-06-03 20:16:57,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-03 20:16:57,302 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 357 transitions, 4468 flow [2024-06-03 20:16:57,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:57,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:16:57,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:16:57,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:16:57,302 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:16:57,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:16:57,303 INFO L85 PathProgramCache]: Analyzing trace with hash -282130263, now seen corresponding path program 9 times [2024-06-03 20:16:57,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:16:57,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181552748] [2024-06-03 20:16:57,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:16:57,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:16:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:16:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:16:58,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:16:58,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181552748] [2024-06-03 20:16:58,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181552748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:16:58,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:16:58,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:16:58,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221303833] [2024-06-03 20:16:58,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:16:58,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:16:58,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:16:58,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:16:58,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:16:58,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:16:58,726 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 357 transitions, 4468 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:16:58,726 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:16:58,726 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:16:58,726 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:16:59,982 INFO L124 PetriNetUnfolderBase]: 3273/5319 cut-off events. [2024-06-03 20:16:59,983 INFO L125 PetriNetUnfolderBase]: For 569948/569948 co-relation queries the response was YES. [2024-06-03 20:17:00,039 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43701 conditions, 5319 events. 3273/5319 cut-off events. For 569948/569948 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 33310 event pairs, 674 based on Foata normal form. 12/5325 useless extension candidates. Maximal degree in co-relation 43550. Up to 4780 conditions per place. [2024-06-03 20:17:00,061 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 338 selfloop transitions, 60 changer transitions 0/403 dead transitions. [2024-06-03 20:17:00,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 403 transitions, 5462 flow [2024-06-03 20:17:00,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:17:00,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:17:00,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 225 transitions. [2024-06-03 20:17:00,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:17:00,062 INFO L175 Difference]: Start difference. First operand has 318 places, 357 transitions, 4468 flow. Second operand 12 states and 225 transitions. [2024-06-03 20:17:00,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 403 transitions, 5462 flow [2024-06-03 20:17:01,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 403 transitions, 5326 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-03 20:17:01,240 INFO L231 Difference]: Finished difference. Result has 322 places, 357 transitions, 4458 flow [2024-06-03 20:17:01,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4332, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=4458, PETRI_PLACES=322, PETRI_TRANSITIONS=357} [2024-06-03 20:17:01,241 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 279 predicate places. [2024-06-03 20:17:01,241 INFO L495 AbstractCegarLoop]: Abstraction has has 322 places, 357 transitions, 4458 flow [2024-06-03 20:17:01,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:01,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:01,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:01,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:17:01,241 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:01,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:01,242 INFO L85 PathProgramCache]: Analyzing trace with hash -286714233, now seen corresponding path program 10 times [2024-06-03 20:17:01,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:01,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753003319] [2024-06-03 20:17:01,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:01,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:01,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:02,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:02,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:02,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753003319] [2024-06-03 20:17:02,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753003319] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:02,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:02,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:17:02,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2021043401] [2024-06-03 20:17:02,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:02,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:17:02,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:02,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:17:02,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:17:02,595 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:02,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 322 places, 357 transitions, 4458 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:02,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:02,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:02,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:03,883 INFO L124 PetriNetUnfolderBase]: 3253/5287 cut-off events. [2024-06-03 20:17:03,884 INFO L125 PetriNetUnfolderBase]: For 546223/546223 co-relation queries the response was YES. [2024-06-03 20:17:03,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42522 conditions, 5287 events. 3253/5287 cut-off events. For 546223/546223 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 33223 event pairs, 638 based on Foata normal form. 12/5293 useless extension candidates. Maximal degree in co-relation 42370. Up to 4790 conditions per place. [2024-06-03 20:17:03,956 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 330 selfloop transitions, 57 changer transitions 0/392 dead transitions. [2024-06-03 20:17:03,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 392 transitions, 5220 flow [2024-06-03 20:17:03,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:17:03,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:17:03,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-03 20:17:03,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-03 20:17:03,957 INFO L175 Difference]: Start difference. First operand has 322 places, 357 transitions, 4458 flow. Second operand 10 states and 188 transitions. [2024-06-03 20:17:03,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 392 transitions, 5220 flow [2024-06-03 20:17:05,076 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 392 transitions, 4980 flow, removed 7 selfloop flow, removed 13 redundant places. [2024-06-03 20:17:05,080 INFO L231 Difference]: Finished difference. Result has 318 places, 356 transitions, 4200 flow [2024-06-03 20:17:05,081 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4082, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4200, PETRI_PLACES=318, PETRI_TRANSITIONS=356} [2024-06-03 20:17:05,081 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 275 predicate places. [2024-06-03 20:17:05,081 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 356 transitions, 4200 flow [2024-06-03 20:17:05,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:05,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:05,081 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:05,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:17:05,082 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:05,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:05,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1178549313, now seen corresponding path program 4 times [2024-06-03 20:17:05,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:05,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1973116893] [2024-06-03 20:17:05,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:05,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:05,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:05,787 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:05,787 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1973116893] [2024-06-03 20:17:05,787 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1973116893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:05,787 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:05,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:05,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720547510] [2024-06-03 20:17:05,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:05,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:05,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:05,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:05,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:05,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:05,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 356 transitions, 4200 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:05,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:05,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:05,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:07,010 INFO L124 PetriNetUnfolderBase]: 3287/5334 cut-off events. [2024-06-03 20:17:07,010 INFO L125 PetriNetUnfolderBase]: For 541891/541891 co-relation queries the response was YES. [2024-06-03 20:17:07,076 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43028 conditions, 5334 events. 3287/5334 cut-off events. For 541891/541891 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 33418 event pairs, 676 based on Foata normal form. 2/5330 useless extension candidates. Maximal degree in co-relation 42876. Up to 4868 conditions per place. [2024-06-03 20:17:07,099 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 310 selfloop transitions, 84 changer transitions 0/399 dead transitions. [2024-06-03 20:17:07,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 399 transitions, 5956 flow [2024-06-03 20:17:07,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:07,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:07,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 20:17:07,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 20:17:07,100 INFO L175 Difference]: Start difference. First operand has 318 places, 356 transitions, 4200 flow. Second operand 8 states and 157 transitions. [2024-06-03 20:17:07,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 399 transitions, 5956 flow [2024-06-03 20:17:08,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 399 transitions, 5627 flow, removed 19 selfloop flow, removed 12 redundant places. [2024-06-03 20:17:08,543 INFO L231 Difference]: Finished difference. Result has 315 places, 372 transitions, 4437 flow [2024-06-03 20:17:08,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3871, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4437, PETRI_PLACES=315, PETRI_TRANSITIONS=372} [2024-06-03 20:17:08,544 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 272 predicate places. [2024-06-03 20:17:08,544 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 372 transitions, 4437 flow [2024-06-03 20:17:08,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:08,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:08,544 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:08,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:17:08,544 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:08,544 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:08,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1178429343, now seen corresponding path program 5 times [2024-06-03 20:17:08,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:08,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011445405] [2024-06-03 20:17:08,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:08,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:08,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:09,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:09,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:09,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011445405] [2024-06-03 20:17:09,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011445405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:09,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:09,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:09,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930312499] [2024-06-03 20:17:09,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:09,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:09,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:09,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:09,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:09,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:09,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 372 transitions, 4437 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:09,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:09,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:09,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:10,529 INFO L124 PetriNetUnfolderBase]: 3307/5364 cut-off events. [2024-06-03 20:17:10,530 INFO L125 PetriNetUnfolderBase]: For 555959/555959 co-relation queries the response was YES. [2024-06-03 20:17:10,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42924 conditions, 5364 events. 3307/5364 cut-off events. For 555959/555959 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 33684 event pairs, 675 based on Foata normal form. 2/5360 useless extension candidates. Maximal degree in co-relation 42774. Up to 5049 conditions per place. [2024-06-03 20:17:10,591 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 335 selfloop transitions, 59 changer transitions 0/399 dead transitions. [2024-06-03 20:17:10,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 322 places, 399 transitions, 5435 flow [2024-06-03 20:17:10,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:10,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:10,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:17:10,593 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 20:17:10,593 INFO L175 Difference]: Start difference. First operand has 315 places, 372 transitions, 4437 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:17:10,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 322 places, 399 transitions, 5435 flow [2024-06-03 20:17:11,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 399 transitions, 5266 flow, removed 76 selfloop flow, removed 2 redundant places. [2024-06-03 20:17:11,858 INFO L231 Difference]: Finished difference. Result has 321 places, 380 transitions, 4534 flow [2024-06-03 20:17:11,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4292, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=372, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4534, PETRI_PLACES=321, PETRI_TRANSITIONS=380} [2024-06-03 20:17:11,859 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 278 predicate places. [2024-06-03 20:17:11,859 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 380 transitions, 4534 flow [2024-06-03 20:17:11,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:11,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:11,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:11,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:17:11,859 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:11,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:11,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1178429157, now seen corresponding path program 4 times [2024-06-03 20:17:11,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:11,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635321747] [2024-06-03 20:17:11,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:11,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:11,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:12,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:12,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635321747] [2024-06-03 20:17:12,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [635321747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:12,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:12,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:12,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601550158] [2024-06-03 20:17:12,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:12,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:12,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:12,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:12,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:12,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:12,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 380 transitions, 4534 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:12,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:12,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:12,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:13,744 INFO L124 PetriNetUnfolderBase]: 3351/5433 cut-off events. [2024-06-03 20:17:13,745 INFO L125 PetriNetUnfolderBase]: For 585703/585703 co-relation queries the response was YES. [2024-06-03 20:17:13,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43755 conditions, 5433 events. 3351/5433 cut-off events. For 585703/585703 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 34198 event pairs, 673 based on Foata normal form. 4/5431 useless extension candidates. Maximal degree in co-relation 43603. Up to 4970 conditions per place. [2024-06-03 20:17:13,819 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 330 selfloop transitions, 77 changer transitions 0/412 dead transitions. [2024-06-03 20:17:13,820 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 412 transitions, 5969 flow [2024-06-03 20:17:13,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:13,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:13,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-03 20:17:13,821 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-03 20:17:13,821 INFO L175 Difference]: Start difference. First operand has 321 places, 380 transitions, 4534 flow. Second operand 8 states and 156 transitions. [2024-06-03 20:17:13,821 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 412 transitions, 5969 flow [2024-06-03 20:17:15,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 324 places, 412 transitions, 5816 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:15,419 INFO L231 Difference]: Finished difference. Result has 325 places, 386 transitions, 4692 flow [2024-06-03 20:17:15,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4381, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=306, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4692, PETRI_PLACES=325, PETRI_TRANSITIONS=386} [2024-06-03 20:17:15,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 282 predicate places. [2024-06-03 20:17:15,420 INFO L495 AbstractCegarLoop]: Abstraction has has 325 places, 386 transitions, 4692 flow [2024-06-03 20:17:15,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:15,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:15,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:15,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:17:15,420 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:15,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:15,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1961001891, now seen corresponding path program 6 times [2024-06-03 20:17:15,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:15,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664121102] [2024-06-03 20:17:15,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:15,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:15,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:16,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:16,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664121102] [2024-06-03 20:17:16,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664121102] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:16,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:16,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:16,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31848922] [2024-06-03 20:17:16,075 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:16,076 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:16,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:16,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:16,076 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:16,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:16,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 325 places, 386 transitions, 4692 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:16,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:16,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:16,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:17,266 INFO L124 PetriNetUnfolderBase]: 3361/5447 cut-off events. [2024-06-03 20:17:17,266 INFO L125 PetriNetUnfolderBase]: For 595468/595468 co-relation queries the response was YES. [2024-06-03 20:17:17,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44453 conditions, 5447 events. 3361/5447 cut-off events. For 595468/595468 co-relation queries the response was YES. Maximal size of possible extension queue 381. Compared 34306 event pairs, 689 based on Foata normal form. 2/5443 useless extension candidates. Maximal degree in co-relation 44300. Up to 4955 conditions per place. [2024-06-03 20:17:17,342 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 307 selfloop transitions, 102 changer transitions 0/414 dead transitions. [2024-06-03 20:17:17,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 332 places, 414 transitions, 6044 flow [2024-06-03 20:17:17,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:17,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:17,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 20:17:17,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-03 20:17:17,343 INFO L175 Difference]: Start difference. First operand has 325 places, 386 transitions, 4692 flow. Second operand 8 states and 155 transitions. [2024-06-03 20:17:17,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 332 places, 414 transitions, 6044 flow [2024-06-03 20:17:18,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 414 transitions, 5834 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-03 20:17:18,786 INFO L231 Difference]: Finished difference. Result has 328 places, 389 transitions, 4761 flow [2024-06-03 20:17:18,786 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4482, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4761, PETRI_PLACES=328, PETRI_TRANSITIONS=389} [2024-06-03 20:17:18,786 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-03 20:17:18,786 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 389 transitions, 4761 flow [2024-06-03 20:17:18,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:18,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:18,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:18,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:17:18,787 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:18,787 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:18,787 INFO L85 PathProgramCache]: Analyzing trace with hash -909668643, now seen corresponding path program 7 times [2024-06-03 20:17:18,787 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:18,787 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040192345] [2024-06-03 20:17:18,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:18,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:18,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:19,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:19,514 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:19,514 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040192345] [2024-06-03 20:17:19,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040192345] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:19,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:19,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:19,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574096324] [2024-06-03 20:17:19,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:19,515 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:19,515 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:19,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:19,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:19,581 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:19,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 389 transitions, 4761 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:19,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:19,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:19,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:20,736 INFO L124 PetriNetUnfolderBase]: 3371/5463 cut-off events. [2024-06-03 20:17:20,736 INFO L125 PetriNetUnfolderBase]: For 602259/602259 co-relation queries the response was YES. [2024-06-03 20:17:20,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44303 conditions, 5463 events. 3371/5463 cut-off events. For 602259/602259 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 34428 event pairs, 677 based on Foata normal form. 2/5459 useless extension candidates. Maximal degree in co-relation 44149. Up to 4965 conditions per place. [2024-06-03 20:17:20,814 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 299 selfloop transitions, 110 changer transitions 0/414 dead transitions. [2024-06-03 20:17:20,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 414 transitions, 5958 flow [2024-06-03 20:17:20,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:20,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:20,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-03 20:17:20,815 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494047619047619 [2024-06-03 20:17:20,815 INFO L175 Difference]: Start difference. First operand has 328 places, 389 transitions, 4761 flow. Second operand 8 states and 151 transitions. [2024-06-03 20:17:20,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 414 transitions, 5958 flow [2024-06-03 20:17:22,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 329 places, 414 transitions, 5684 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:22,467 INFO L231 Difference]: Finished difference. Result has 330 places, 393 transitions, 4812 flow [2024-06-03 20:17:22,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4812, PETRI_PLACES=330, PETRI_TRANSITIONS=393} [2024-06-03 20:17:22,480 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 287 predicate places. [2024-06-03 20:17:22,481 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 393 transitions, 4812 flow [2024-06-03 20:17:22,481 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:22,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:22,481 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:22,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:17:22,481 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:22,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:22,482 INFO L85 PathProgramCache]: Analyzing trace with hash -794644383, now seen corresponding path program 8 times [2024-06-03 20:17:22,482 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:22,482 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957206516] [2024-06-03 20:17:22,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:22,482 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:22,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:23,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:23,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957206516] [2024-06-03 20:17:23,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957206516] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:23,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:23,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:23,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271446751] [2024-06-03 20:17:23,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:23,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:23,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:23,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:23,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:23,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:23,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 393 transitions, 4812 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:23,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:23,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:23,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:24,642 INFO L124 PetriNetUnfolderBase]: 3407/5531 cut-off events. [2024-06-03 20:17:24,643 INFO L125 PetriNetUnfolderBase]: For 623541/623541 co-relation queries the response was YES. [2024-06-03 20:17:24,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44945 conditions, 5531 events. 3407/5531 cut-off events. For 623541/623541 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 34962 event pairs, 683 based on Foata normal form. 2/5527 useless extension candidates. Maximal degree in co-relation 44791. Up to 5156 conditions per place. [2024-06-03 20:17:24,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 346 selfloop transitions, 78 changer transitions 0/429 dead transitions. [2024-06-03 20:17:24,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 429 transitions, 6203 flow [2024-06-03 20:17:24,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:17:24,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:17:24,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 177 transitions. [2024-06-03 20:17:24,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2024-06-03 20:17:24,716 INFO L175 Difference]: Start difference. First operand has 330 places, 393 transitions, 4812 flow. Second operand 10 states and 177 transitions. [2024-06-03 20:17:24,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 429 transitions, 6203 flow [2024-06-03 20:17:26,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 429 transitions, 5984 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:26,373 INFO L231 Difference]: Finished difference. Result has 338 places, 406 transitions, 5034 flow [2024-06-03 20:17:26,373 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4610, PETRI_DIFFERENCE_MINUEND_PLACES=326, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=393, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5034, PETRI_PLACES=338, PETRI_TRANSITIONS=406} [2024-06-03 20:17:26,374 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-03 20:17:26,374 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 406 transitions, 5034 flow [2024-06-03 20:17:26,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:26,374 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:26,374 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:26,374 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:17:26,374 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:26,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:26,375 INFO L85 PathProgramCache]: Analyzing trace with hash -794644197, now seen corresponding path program 5 times [2024-06-03 20:17:26,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:26,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520856284] [2024-06-03 20:17:26,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:26,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:27,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:27,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:27,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520856284] [2024-06-03 20:17:27,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520856284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:27,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:27,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:27,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342788831] [2024-06-03 20:17:27,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:27,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:27,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:27,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:27,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:27,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:27,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 406 transitions, 5034 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:27,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:27,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:27,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:28,393 INFO L124 PetriNetUnfolderBase]: 3459/5609 cut-off events. [2024-06-03 20:17:28,393 INFO L125 PetriNetUnfolderBase]: For 661713/661713 co-relation queries the response was YES. [2024-06-03 20:17:28,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45896 conditions, 5609 events. 3459/5609 cut-off events. For 661713/661713 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 35511 event pairs, 683 based on Foata normal form. 4/5607 useless extension candidates. Maximal degree in co-relation 45739. Up to 5080 conditions per place. [2024-06-03 20:17:28,465 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 348 selfloop transitions, 86 changer transitions 0/439 dead transitions. [2024-06-03 20:17:28,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 439 transitions, 6529 flow [2024-06-03 20:17:28,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:28,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:28,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-03 20:17:28,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-03 20:17:28,466 INFO L175 Difference]: Start difference. First operand has 338 places, 406 transitions, 5034 flow. Second operand 8 states and 155 transitions. [2024-06-03 20:17:28,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 439 transitions, 6529 flow [2024-06-03 20:17:30,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 439 transitions, 6369 flow, removed 43 selfloop flow, removed 3 redundant places. [2024-06-03 20:17:30,233 INFO L231 Difference]: Finished difference. Result has 343 places, 412 transitions, 5161 flow [2024-06-03 20:17:30,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4874, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5161, PETRI_PLACES=343, PETRI_TRANSITIONS=412} [2024-06-03 20:17:30,233 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-03 20:17:30,234 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 412 transitions, 5161 flow [2024-06-03 20:17:30,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:30,234 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:30,234 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:30,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:17:30,234 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:30,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:30,234 INFO L85 PathProgramCache]: Analyzing trace with hash 2088851967, now seen corresponding path program 6 times [2024-06-03 20:17:30,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:30,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375961794] [2024-06-03 20:17:30,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:30,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:30,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:30,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:30,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:30,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375961794] [2024-06-03 20:17:30,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375961794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:30,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:30,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:30,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844150614] [2024-06-03 20:17:30,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:30,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:30,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:30,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:30,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:31,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:31,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 412 transitions, 5161 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:31,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:31,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:31,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:32,383 INFO L124 PetriNetUnfolderBase]: 3447/5598 cut-off events. [2024-06-03 20:17:32,384 INFO L125 PetriNetUnfolderBase]: For 657628/657628 co-relation queries the response was YES. [2024-06-03 20:17:32,432 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45597 conditions, 5598 events. 3447/5598 cut-off events. For 657628/657628 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 35528 event pairs, 863 based on Foata normal form. 4/5600 useless extension candidates. Maximal degree in co-relation 45439. Up to 5324 conditions per place. [2024-06-03 20:17:32,451 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 398 selfloop transitions, 26 changer transitions 0/429 dead transitions. [2024-06-03 20:17:32,451 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 429 transitions, 6079 flow [2024-06-03 20:17:32,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:32,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:32,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 20:17:32,452 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:17:32,452 INFO L175 Difference]: Start difference. First operand has 343 places, 412 transitions, 5161 flow. Second operand 8 states and 144 transitions. [2024-06-03 20:17:32,452 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 429 transitions, 6079 flow [2024-06-03 20:17:34,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 429 transitions, 5890 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:34,453 INFO L231 Difference]: Finished difference. Result has 347 places, 412 transitions, 5030 flow [2024-06-03 20:17:34,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4972, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5030, PETRI_PLACES=347, PETRI_TRANSITIONS=412} [2024-06-03 20:17:34,453 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 304 predicate places. [2024-06-03 20:17:34,454 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 412 transitions, 5030 flow [2024-06-03 20:17:34,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:34,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:34,454 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:34,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:17:34,454 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:34,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:34,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2088673221, now seen corresponding path program 9 times [2024-06-03 20:17:34,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:34,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [130033339] [2024-06-03 20:17:34,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:34,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:34,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:35,116 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:35,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:35,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [130033339] [2024-06-03 20:17:35,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [130033339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:35,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:35,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:35,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712557228] [2024-06-03 20:17:35,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:35,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:35,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:35,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:35,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:35,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:35,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 412 transitions, 5030 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:35,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:35,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:35,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:36,452 INFO L124 PetriNetUnfolderBase]: 3441/5579 cut-off events. [2024-06-03 20:17:36,452 INFO L125 PetriNetUnfolderBase]: For 652643/652643 co-relation queries the response was YES. [2024-06-03 20:17:36,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45075 conditions, 5579 events. 3441/5579 cut-off events. For 652643/652643 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 35304 event pairs, 688 based on Foata normal form. 2/5575 useless extension candidates. Maximal degree in co-relation 44916. Up to 5207 conditions per place. [2024-06-03 20:17:36,533 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 348 selfloop transitions, 77 changer transitions 0/430 dead transitions. [2024-06-03 20:17:36,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 430 transitions, 5968 flow [2024-06-03 20:17:36,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:17:36,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:17:36,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-03 20:17:36,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-03 20:17:36,534 INFO L175 Difference]: Start difference. First operand has 347 places, 412 transitions, 5030 flow. Second operand 8 states and 146 transitions. [2024-06-03 20:17:36,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 430 transitions, 5968 flow [2024-06-03 20:17:38,831 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 430 transitions, 5834 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:38,837 INFO L231 Difference]: Finished difference. Result has 348 places, 412 transitions, 5056 flow [2024-06-03 20:17:38,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4896, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5056, PETRI_PLACES=348, PETRI_TRANSITIONS=412} [2024-06-03 20:17:38,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 20:17:38,837 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 412 transitions, 5056 flow [2024-06-03 20:17:38,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:38,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:38,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:38,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:17:38,838 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:38,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:38,839 INFO L85 PathProgramCache]: Analyzing trace with hash 864271653, now seen corresponding path program 7 times [2024-06-03 20:17:38,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:38,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390685993] [2024-06-03 20:17:38,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:38,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:38,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:39,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:39,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:39,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390685993] [2024-06-03 20:17:39,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390685993] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:39,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:39,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:39,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311772700] [2024-06-03 20:17:39,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:39,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:39,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:39,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:39,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:39,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:39,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 412 transitions, 5056 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:39,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:39,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:39,546 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:40,801 INFO L124 PetriNetUnfolderBase]: 3461/5620 cut-off events. [2024-06-03 20:17:40,801 INFO L125 PetriNetUnfolderBase]: For 675101/675101 co-relation queries the response was YES. [2024-06-03 20:17:40,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45487 conditions, 5620 events. 3461/5620 cut-off events. For 675101/675101 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 35675 event pairs, 684 based on Foata normal form. 4/5622 useless extension candidates. Maximal degree in co-relation 45327. Up to 5223 conditions per place. [2024-06-03 20:17:40,912 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 375 selfloop transitions, 58 changer transitions 0/438 dead transitions. [2024-06-03 20:17:40,912 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 438 transitions, 6277 flow [2024-06-03 20:17:40,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:40,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:40,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-03 20:17:40,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47278911564625853 [2024-06-03 20:17:40,914 INFO L175 Difference]: Start difference. First operand has 348 places, 412 transitions, 5056 flow. Second operand 7 states and 139 transitions. [2024-06-03 20:17:40,914 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 438 transitions, 6277 flow [2024-06-03 20:17:42,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 438 transitions, 6123 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:17:42,875 INFO L231 Difference]: Finished difference. Result has 348 places, 415 transitions, 5100 flow [2024-06-03 20:17:42,875 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4902, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5100, PETRI_PLACES=348, PETRI_TRANSITIONS=415} [2024-06-03 20:17:42,876 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 20:17:42,876 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 415 transitions, 5100 flow [2024-06-03 20:17:42,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:42,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:42,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:42,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:17:42,877 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:42,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash 864271467, now seen corresponding path program 10 times [2024-06-03 20:17:42,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:42,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294460596] [2024-06-03 20:17:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:42,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:43,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:43,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294460596] [2024-06-03 20:17:43,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294460596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:43,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:43,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:43,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121868590] [2024-06-03 20:17:43,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:43,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:43,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:43,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:43,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:43,615 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:43,615 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 415 transitions, 5100 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:43,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:43,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:43,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:44,920 INFO L124 PetriNetUnfolderBase]: 3455/5610 cut-off events. [2024-06-03 20:17:44,920 INFO L125 PetriNetUnfolderBase]: For 670539/670539 co-relation queries the response was YES. [2024-06-03 20:17:44,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45388 conditions, 5610 events. 3455/5610 cut-off events. For 670539/670539 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 35658 event pairs, 681 based on Foata normal form. 2/5610 useless extension candidates. Maximal degree in co-relation 45227. Up to 5278 conditions per place. [2024-06-03 20:17:45,012 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 386 selfloop transitions, 47 changer transitions 0/438 dead transitions. [2024-06-03 20:17:45,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 438 transitions, 6055 flow [2024-06-03 20:17:45,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:45,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-03 20:17:45,014 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-03 20:17:45,014 INFO L175 Difference]: Start difference. First operand has 348 places, 415 transitions, 5100 flow. Second operand 7 states and 137 transitions. [2024-06-03 20:17:45,014 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 438 transitions, 6055 flow [2024-06-03 20:17:47,651 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 438 transitions, 5871 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:47,657 INFO L231 Difference]: Finished difference. Result has 349 places, 415 transitions, 5032 flow [2024-06-03 20:17:47,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4916, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5032, PETRI_PLACES=349, PETRI_TRANSITIONS=415} [2024-06-03 20:17:47,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-03 20:17:47,657 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 415 transitions, 5032 flow [2024-06-03 20:17:47,657 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:47,657 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:47,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:47,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:17:47,658 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:47,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:47,658 INFO L85 PathProgramCache]: Analyzing trace with hash 864278163, now seen corresponding path program 8 times [2024-06-03 20:17:47,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:47,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257607572] [2024-06-03 20:17:47,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:47,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:47,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:48,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:48,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:48,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257607572] [2024-06-03 20:17:48,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1257607572] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:48,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:48,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:48,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851787888] [2024-06-03 20:17:48,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:48,328 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:48,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:48,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:48,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:48,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:48,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 415 transitions, 5032 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:48,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:48,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:48,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:49,600 INFO L124 PetriNetUnfolderBase]: 3475/5640 cut-off events. [2024-06-03 20:17:49,600 INFO L125 PetriNetUnfolderBase]: For 666362/666362 co-relation queries the response was YES. [2024-06-03 20:17:49,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45282 conditions, 5640 events. 3475/5640 cut-off events. For 666362/666362 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 35826 event pairs, 686 based on Foata normal form. 4/5642 useless extension candidates. Maximal degree in co-relation 45122. Up to 5344 conditions per place. [2024-06-03 20:17:49,682 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 397 selfloop transitions, 35 changer transitions 0/437 dead transitions. [2024-06-03 20:17:49,682 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 437 transitions, 6048 flow [2024-06-03 20:17:49,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:49,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:49,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-03 20:17:49,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-03 20:17:49,686 INFO L175 Difference]: Start difference. First operand has 349 places, 415 transitions, 5032 flow. Second operand 7 states and 131 transitions. [2024-06-03 20:17:49,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 437 transitions, 6048 flow [2024-06-03 20:17:51,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 437 transitions, 5941 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:51,670 INFO L231 Difference]: Finished difference. Result has 350 places, 420 transitions, 5095 flow [2024-06-03 20:17:51,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4925, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=415, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5095, PETRI_PLACES=350, PETRI_TRANSITIONS=420} [2024-06-03 20:17:51,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-03 20:17:51,673 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 420 transitions, 5095 flow [2024-06-03 20:17:51,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:51,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:51,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:51,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:17:51,674 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:51,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:51,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1164368517, now seen corresponding path program 9 times [2024-06-03 20:17:51,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:51,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761169304] [2024-06-03 20:17:51,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:51,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:52,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:52,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:52,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761169304] [2024-06-03 20:17:52,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761169304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:52,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:52,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:52,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765045802] [2024-06-03 20:17:52,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:52,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:52,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:52,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:52,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:52,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:52,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 420 transitions, 5095 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:52,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:52,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:52,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:53,635 INFO L124 PetriNetUnfolderBase]: 3495/5667 cut-off events. [2024-06-03 20:17:53,636 INFO L125 PetriNetUnfolderBase]: For 667399/667399 co-relation queries the response was YES. [2024-06-03 20:17:53,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45512 conditions, 5667 events. 3495/5667 cut-off events. For 667399/667399 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 35985 event pairs, 680 based on Foata normal form. 4/5665 useless extension candidates. Maximal degree in co-relation 45351. Up to 5104 conditions per place. [2024-06-03 20:17:53,715 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 99 changer transitions 0/447 dead transitions. [2024-06-03 20:17:53,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 447 transitions, 6532 flow [2024-06-03 20:17:53,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:17:53,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:17:53,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 141 transitions. [2024-06-03 20:17:53,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47959183673469385 [2024-06-03 20:17:53,717 INFO L175 Difference]: Start difference. First operand has 350 places, 420 transitions, 5095 flow. Second operand 7 states and 141 transitions. [2024-06-03 20:17:53,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 447 transitions, 6532 flow [2024-06-03 20:17:55,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 447 transitions, 6437 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-03 20:17:55,568 INFO L231 Difference]: Finished difference. Result has 353 places, 423 transitions, 5276 flow [2024-06-03 20:17:55,568 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5004, PETRI_DIFFERENCE_MINUEND_PLACES=346, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5276, PETRI_PLACES=353, PETRI_TRANSITIONS=423} [2024-06-03 20:17:55,568 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 20:17:55,569 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 423 transitions, 5276 flow [2024-06-03 20:17:55,569 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:55,569 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:55,569 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:55,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:17:55,569 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:55,569 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:55,569 INFO L85 PathProgramCache]: Analyzing trace with hash 877021023, now seen corresponding path program 10 times [2024-06-03 20:17:55,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:55,570 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105198077] [2024-06-03 20:17:55,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:55,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:55,576 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:17:56,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:17:56,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:17:56,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105198077] [2024-06-03 20:17:56,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105198077] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:17:56,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:17:56,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:17:56,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528091129] [2024-06-03 20:17:56,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:17:56,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:17:56,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:17:56,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:17:56,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:17:56,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:17:56,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 423 transitions, 5276 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:56,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:17:56,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:17:56,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:17:57,676 INFO L124 PetriNetUnfolderBase]: 3483/5662 cut-off events. [2024-06-03 20:17:57,676 INFO L125 PetriNetUnfolderBase]: For 650159/650159 co-relation queries the response was YES. [2024-06-03 20:17:57,727 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45193 conditions, 5662 events. 3483/5662 cut-off events. For 650159/650159 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 36065 event pairs, 686 based on Foata normal form. 4/5664 useless extension candidates. Maximal degree in co-relation 45032. Up to 5333 conditions per place. [2024-06-03 20:17:57,746 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 393 selfloop transitions, 44 changer transitions 0/442 dead transitions. [2024-06-03 20:17:57,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 442 transitions, 6226 flow [2024-06-03 20:17:57,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:17:57,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:17:57,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-03 20:17:57,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 20:17:57,747 INFO L175 Difference]: Start difference. First operand has 353 places, 423 transitions, 5276 flow. Second operand 6 states and 122 transitions. [2024-06-03 20:17:57,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 442 transitions, 6226 flow [2024-06-03 20:17:59,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 442 transitions, 5984 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 20:17:59,958 INFO L231 Difference]: Finished difference. Result has 353 places, 423 transitions, 5150 flow [2024-06-03 20:17:59,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5034, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5150, PETRI_PLACES=353, PETRI_TRANSITIONS=423} [2024-06-03 20:17:59,958 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 20:17:59,958 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 423 transitions, 5150 flow [2024-06-03 20:17:59,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:17:59,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:17:59,959 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:17:59,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:17:59,959 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:17:59,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:17:59,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1164368703, now seen corresponding path program 11 times [2024-06-03 20:17:59,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:17:59,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343322339] [2024-06-03 20:17:59,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:17:59,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:17:59,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:00,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:00,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:00,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343322339] [2024-06-03 20:18:00,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343322339] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:00,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:00,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:00,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676319518] [2024-06-03 20:18:00,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:00,644 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:00,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:00,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:00,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:00,716 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:00,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 423 transitions, 5150 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:00,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:00,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:00,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:02,051 INFO L124 PetriNetUnfolderBase]: 3477/5657 cut-off events. [2024-06-03 20:18:02,051 INFO L125 PetriNetUnfolderBase]: For 618984/618984 co-relation queries the response was YES. [2024-06-03 20:18:02,099 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44411 conditions, 5657 events. 3477/5657 cut-off events. For 618984/618984 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 36009 event pairs, 701 based on Foata normal form. 2/5653 useless extension candidates. Maximal degree in co-relation 44251. Up to 5200 conditions per place. [2024-06-03 20:18:02,117 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 365 selfloop transitions, 78 changer transitions 0/448 dead transitions. [2024-06-03 20:18:02,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 448 transitions, 6346 flow [2024-06-03 20:18:02,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:02,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:02,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-03 20:18:02,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:18:02,118 INFO L175 Difference]: Start difference. First operand has 353 places, 423 transitions, 5150 flow. Second operand 7 states and 140 transitions. [2024-06-03 20:18:02,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 448 transitions, 6346 flow [2024-06-03 20:18:03,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 448 transitions, 6194 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:03,628 INFO L231 Difference]: Finished difference. Result has 355 places, 423 transitions, 5171 flow [2024-06-03 20:18:03,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4998, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5171, PETRI_PLACES=355, PETRI_TRANSITIONS=423} [2024-06-03 20:18:03,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 20:18:03,628 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 423 transitions, 5171 flow [2024-06-03 20:18:03,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:03,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:03,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:03,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:18:03,629 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:03,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:03,629 INFO L85 PathProgramCache]: Analyzing trace with hash 877200513, now seen corresponding path program 11 times [2024-06-03 20:18:03,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:03,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54432405] [2024-06-03 20:18:03,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:03,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:03,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:04,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:04,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:04,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54432405] [2024-06-03 20:18:04,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54432405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:04,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:04,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:04,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947843203] [2024-06-03 20:18:04,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:04,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:04,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:04,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:04,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:04,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:04,421 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 423 transitions, 5171 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:04,421 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:04,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:04,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:05,664 INFO L124 PetriNetUnfolderBase]: 3507/5708 cut-off events. [2024-06-03 20:18:05,664 INFO L125 PetriNetUnfolderBase]: For 639584/639584 co-relation queries the response was YES. [2024-06-03 20:18:05,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44947 conditions, 5708 events. 3507/5708 cut-off events. For 639584/639584 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 36460 event pairs, 691 based on Foata normal form. 4/5710 useless extension candidates. Maximal degree in co-relation 44786. Up to 5292 conditions per place. [2024-06-03 20:18:05,743 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 373 selfloop transitions, 76 changer transitions 0/454 dead transitions. [2024-06-03 20:18:05,743 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 454 transitions, 6280 flow [2024-06-03 20:18:05,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:05,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:05,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 20:18:05,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-03 20:18:05,744 INFO L175 Difference]: Start difference. First operand has 355 places, 423 transitions, 5171 flow. Second operand 7 states and 144 transitions. [2024-06-03 20:18:05,744 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 454 transitions, 6280 flow [2024-06-03 20:18:07,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 454 transitions, 6125 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:07,631 INFO L231 Difference]: Finished difference. Result has 356 places, 429 transitions, 5348 flow [2024-06-03 20:18:07,632 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5016, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=423, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5348, PETRI_PLACES=356, PETRI_TRANSITIONS=429} [2024-06-03 20:18:07,632 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-03 20:18:07,632 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 429 transitions, 5348 flow [2024-06-03 20:18:07,632 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:07,632 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:07,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:07,633 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:18:07,633 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:07,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:07,633 INFO L85 PathProgramCache]: Analyzing trace with hash -1160355171, now seen corresponding path program 12 times [2024-06-03 20:18:07,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:07,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179119986] [2024-06-03 20:18:07,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:07,634 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:07,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:08,290 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:08,291 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:08,291 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179119986] [2024-06-03 20:18:08,291 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179119986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:08,291 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:08,291 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:08,291 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953145468] [2024-06-03 20:18:08,291 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:08,291 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:08,292 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:08,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:08,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:08,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:08,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 429 transitions, 5348 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:08,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:08,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:08,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:09,610 INFO L124 PetriNetUnfolderBase]: 3495/5682 cut-off events. [2024-06-03 20:18:09,610 INFO L125 PetriNetUnfolderBase]: For 623503/623503 co-relation queries the response was YES. [2024-06-03 20:18:09,678 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44516 conditions, 5682 events. 3495/5682 cut-off events. For 623503/623503 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 36223 event pairs, 863 based on Foata normal form. 4/5684 useless extension candidates. Maximal degree in co-relation 44356. Up to 5374 conditions per place. [2024-06-03 20:18:09,702 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 408 selfloop transitions, 32 changer transitions 0/445 dead transitions. [2024-06-03 20:18:09,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 445 transitions, 6296 flow [2024-06-03 20:18:09,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:09,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:09,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:18:09,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 20:18:09,704 INFO L175 Difference]: Start difference. First operand has 356 places, 429 transitions, 5348 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:18:09,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 445 transitions, 6296 flow [2024-06-03 20:18:11,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 445 transitions, 6141 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:11,703 INFO L231 Difference]: Finished difference. Result has 359 places, 429 transitions, 5267 flow [2024-06-03 20:18:11,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5193, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5267, PETRI_PLACES=359, PETRI_TRANSITIONS=429} [2024-06-03 20:18:11,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-03 20:18:11,703 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 429 transitions, 5267 flow [2024-06-03 20:18:11,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:11,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:11,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:11,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:18:11,704 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:11,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:11,704 INFO L85 PathProgramCache]: Analyzing trace with hash 1811116671, now seen corresponding path program 12 times [2024-06-03 20:18:11,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:11,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908066425] [2024-06-03 20:18:11,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:11,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:11,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:12,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:12,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908066425] [2024-06-03 20:18:12,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908066425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:12,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:12,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:12,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444807439] [2024-06-03 20:18:12,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:12,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:12,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:12,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:12,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:12,433 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:12,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 429 transitions, 5267 flow. Second operand has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:12,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:12,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:12,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:13,696 INFO L124 PetriNetUnfolderBase]: 3489/5681 cut-off events. [2024-06-03 20:18:13,697 INFO L125 PetriNetUnfolderBase]: For 617054/617054 co-relation queries the response was YES. [2024-06-03 20:18:13,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44153 conditions, 5681 events. 3489/5681 cut-off events. For 617054/617054 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 36258 event pairs, 696 based on Foata normal form. 2/5677 useless extension candidates. Maximal degree in co-relation 43992. Up to 5221 conditions per place. [2024-06-03 20:18:13,788 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 363 selfloop transitions, 84 changer transitions 0/452 dead transitions. [2024-06-03 20:18:13,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 452 transitions, 6267 flow [2024-06-03 20:18:13,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:13,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:13,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 20:18:13,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-03 20:18:13,790 INFO L175 Difference]: Start difference. First operand has 359 places, 429 transitions, 5267 flow. Second operand 7 states and 138 transitions. [2024-06-03 20:18:13,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 452 transitions, 6267 flow [2024-06-03 20:18:15,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 452 transitions, 6042 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:15,860 INFO L231 Difference]: Finished difference. Result has 359 places, 429 transitions, 5222 flow [2024-06-03 20:18:15,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5042, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5222, PETRI_PLACES=359, PETRI_TRANSITIONS=429} [2024-06-03 20:18:15,860 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-03 20:18:15,861 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 429 transitions, 5222 flow [2024-06-03 20:18:15,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.777777777777779) internal successors, (106), 9 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:15,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:15,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:15,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:18:15,861 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:15,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:15,862 INFO L85 PathProgramCache]: Analyzing trace with hash -939111333, now seen corresponding path program 2 times [2024-06-03 20:18:15,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:15,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8706597] [2024-06-03 20:18:15,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:15,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:16,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:16,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:16,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8706597] [2024-06-03 20:18:16,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8706597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:16,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:16,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:16,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304787487] [2024-06-03 20:18:16,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:16,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:16,721 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:16,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:16,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:16,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:16,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 429 transitions, 5222 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:18:16,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:16,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:16,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:18,071 INFO L124 PetriNetUnfolderBase]: 3533/5750 cut-off events. [2024-06-03 20:18:18,071 INFO L125 PetriNetUnfolderBase]: For 660788/660788 co-relation queries the response was YES. [2024-06-03 20:18:18,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44480 conditions, 5750 events. 3533/5750 cut-off events. For 660788/660788 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 36777 event pairs, 591 based on Foata normal form. 12/5760 useless extension candidates. Maximal degree in co-relation 44320. Up to 5303 conditions per place. [2024-06-03 20:18:18,154 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 412 selfloop transitions, 37 changer transitions 0/454 dead transitions. [2024-06-03 20:18:18,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 454 transitions, 6280 flow [2024-06-03 20:18:18,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:18,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:18,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 127 transitions. [2024-06-03 20:18:18,155 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.503968253968254 [2024-06-03 20:18:18,155 INFO L175 Difference]: Start difference. First operand has 359 places, 429 transitions, 5222 flow. Second operand 6 states and 127 transitions. [2024-06-03 20:18:18,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 454 transitions, 6280 flow [2024-06-03 20:18:19,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 454 transitions, 6067 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:19,781 INFO L231 Difference]: Finished difference. Result has 358 places, 430 transitions, 5112 flow [2024-06-03 20:18:19,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5009, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5112, PETRI_PLACES=358, PETRI_TRANSITIONS=430} [2024-06-03 20:18:19,782 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 315 predicate places. [2024-06-03 20:18:19,782 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 430 transitions, 5112 flow [2024-06-03 20:18:19,782 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:18:19,782 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:19,782 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:19,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:18:19,782 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:19,783 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:19,783 INFO L85 PathProgramCache]: Analyzing trace with hash -1367208003, now seen corresponding path program 3 times [2024-06-03 20:18:19,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:19,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945334611] [2024-06-03 20:18:19,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:19,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:19,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:20,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:20,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945334611] [2024-06-03 20:18:20,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945334611] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:20,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657041550] [2024-06-03 20:18:20,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:20,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:20,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:20,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:20,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 430 transitions, 5112 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:18:20,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:20,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:20,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:22,040 INFO L124 PetriNetUnfolderBase]: 3577/5812 cut-off events. [2024-06-03 20:18:22,040 INFO L125 PetriNetUnfolderBase]: For 661338/661338 co-relation queries the response was YES. [2024-06-03 20:18:22,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44832 conditions, 5812 events. 3577/5812 cut-off events. For 661338/661338 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 37130 event pairs, 698 based on Foata normal form. 12/5822 useless extension candidates. Maximal degree in co-relation 44672. Up to 5341 conditions per place. [2024-06-03 20:18:22,130 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 407 selfloop transitions, 43 changer transitions 0/455 dead transitions. [2024-06-03 20:18:22,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 455 transitions, 6188 flow [2024-06-03 20:18:22,131 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:22,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-03 20:18:22,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46938775510204084 [2024-06-03 20:18:22,132 INFO L175 Difference]: Start difference. First operand has 358 places, 430 transitions, 5112 flow. Second operand 7 states and 138 transitions. [2024-06-03 20:18:22,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 455 transitions, 6188 flow [2024-06-03 20:18:23,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 360 places, 455 transitions, 6121 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:18:23,815 INFO L231 Difference]: Finished difference. Result has 361 places, 431 transitions, 5157 flow [2024-06-03 20:18:23,815 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5045, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5157, PETRI_PLACES=361, PETRI_TRANSITIONS=431} [2024-06-03 20:18:23,815 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 318 predicate places. [2024-06-03 20:18:23,816 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 431 transitions, 5157 flow [2024-06-03 20:18:23,816 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:18:23,816 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:23,816 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:23,816 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:18:23,816 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:23,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:23,817 INFO L85 PathProgramCache]: Analyzing trace with hash -923874213, now seen corresponding path program 4 times [2024-06-03 20:18:23,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:23,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580332337] [2024-06-03 20:18:23,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:23,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:23,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:24,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:24,716 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:24,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580332337] [2024-06-03 20:18:24,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580332337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:24,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:24,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:24,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737267685] [2024-06-03 20:18:24,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:24,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:24,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:24,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:24,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:24,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:24,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 431 transitions, 5157 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:18:24,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:24,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:24,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:26,148 INFO L124 PetriNetUnfolderBase]: 3579/5830 cut-off events. [2024-06-03 20:18:26,148 INFO L125 PetriNetUnfolderBase]: For 637788/637788 co-relation queries the response was YES. [2024-06-03 20:18:26,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44690 conditions, 5830 events. 3579/5830 cut-off events. For 637788/637788 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 37349 event pairs, 589 based on Foata normal form. 8/5836 useless extension candidates. Maximal degree in co-relation 44529. Up to 5339 conditions per place. [2024-06-03 20:18:26,231 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 416 selfloop transitions, 40 changer transitions 0/461 dead transitions. [2024-06-03 20:18:26,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 461 transitions, 6287 flow [2024-06-03 20:18:26,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:18:26,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:18:26,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-03 20:18:26,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-03 20:18:26,257 INFO L175 Difference]: Start difference. First operand has 361 places, 431 transitions, 5157 flow. Second operand 7 states and 144 transitions. [2024-06-03 20:18:26,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 461 transitions, 6287 flow [2024-06-03 20:18:27,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 461 transitions, 6195 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:27,953 INFO L231 Difference]: Finished difference. Result has 363 places, 432 transitions, 5169 flow [2024-06-03 20:18:27,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5067, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5169, PETRI_PLACES=363, PETRI_TRANSITIONS=432} [2024-06-03 20:18:27,954 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-03 20:18:27,954 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 432 transitions, 5169 flow [2024-06-03 20:18:27,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:18:27,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:27,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:27,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:18:27,955 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:27,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:27,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1970535011, now seen corresponding path program 1 times [2024-06-03 20:18:27,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:27,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817698248] [2024-06-03 20:18:27,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:27,968 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:27,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:28,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:28,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:28,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817698248] [2024-06-03 20:18:28,944 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817698248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:28,944 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:28,944 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:28,944 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264806233] [2024-06-03 20:18:28,944 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:28,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:28,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:28,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:28,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:29,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:29,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 432 transitions, 5169 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:29,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:29,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:29,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:30,488 INFO L124 PetriNetUnfolderBase]: 3552/5831 cut-off events. [2024-06-03 20:18:30,488 INFO L125 PetriNetUnfolderBase]: For 691586/691601 co-relation queries the response was YES. [2024-06-03 20:18:30,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45499 conditions, 5831 events. 3552/5831 cut-off events. For 691586/691601 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 37896 event pairs, 824 based on Foata normal form. 11/5829 useless extension candidates. Maximal degree in co-relation 45337. Up to 5153 conditions per place. [2024-06-03 20:18:30,566 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 358 selfloop transitions, 67 changer transitions 0/471 dead transitions. [2024-06-03 20:18:30,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 471 transitions, 6613 flow [2024-06-03 20:18:30,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:30,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-03 20:18:30,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-03 20:18:30,567 INFO L175 Difference]: Start difference. First operand has 363 places, 432 transitions, 5169 flow. Second operand 9 states and 183 transitions. [2024-06-03 20:18:30,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 471 transitions, 6613 flow [2024-06-03 20:18:32,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 471 transitions, 6525 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:32,322 INFO L231 Difference]: Finished difference. Result has 367 places, 434 transitions, 5265 flow [2024-06-03 20:18:32,323 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5081, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=432, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=366, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5265, PETRI_PLACES=367, PETRI_TRANSITIONS=434} [2024-06-03 20:18:32,323 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-03 20:18:32,323 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 434 transitions, 5265 flow [2024-06-03 20:18:32,323 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:32,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:32,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:32,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:18:32,324 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:32,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:32,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1970595461, now seen corresponding path program 2 times [2024-06-03 20:18:32,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:32,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920544357] [2024-06-03 20:18:32,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:32,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:32,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:33,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:33,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:33,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920544357] [2024-06-03 20:18:33,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920544357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:33,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:33,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:33,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828981127] [2024-06-03 20:18:33,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:33,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:33,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:33,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:33,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:33,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:33,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 434 transitions, 5265 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:33,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:33,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:33,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:34,770 INFO L124 PetriNetUnfolderBase]: 3599/5904 cut-off events. [2024-06-03 20:18:34,770 INFO L125 PetriNetUnfolderBase]: For 706830/706845 co-relation queries the response was YES. [2024-06-03 20:18:34,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46015 conditions, 5904 events. 3599/5904 cut-off events. For 706830/706845 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 38383 event pairs, 853 based on Foata normal form. 12/5904 useless extension candidates. Maximal degree in co-relation 45852. Up to 5327 conditions per place. [2024-06-03 20:18:34,846 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 354 selfloop transitions, 68 changer transitions 0/468 dead transitions. [2024-06-03 20:18:34,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 468 transitions, 6480 flow [2024-06-03 20:18:34,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:34,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:34,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 20:18:34,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-03 20:18:34,847 INFO L175 Difference]: Start difference. First operand has 367 places, 434 transitions, 5265 flow. Second operand 9 states and 177 transitions. [2024-06-03 20:18:34,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 468 transitions, 6480 flow [2024-06-03 20:18:37,177 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 468 transitions, 6386 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:37,183 INFO L231 Difference]: Finished difference. Result has 371 places, 438 transitions, 5359 flow [2024-06-03 20:18:37,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=434, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5359, PETRI_PLACES=371, PETRI_TRANSITIONS=438} [2024-06-03 20:18:37,184 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 20:18:37,184 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 438 transitions, 5359 flow [2024-06-03 20:18:37,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:37,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:37,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:37,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:18:37,185 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:37,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:37,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1973391971, now seen corresponding path program 3 times [2024-06-03 20:18:37,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:37,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984831311] [2024-06-03 20:18:37,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:37,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:37,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:38,276 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:38,276 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:38,276 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984831311] [2024-06-03 20:18:38,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984831311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:38,276 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:38,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:38,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988254412] [2024-06-03 20:18:38,276 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:38,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:38,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:38,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:38,277 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:38,362 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:38,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 438 transitions, 5359 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:38,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:38,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:38,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:39,715 INFO L124 PetriNetUnfolderBase]: 3665/6012 cut-off events. [2024-06-03 20:18:39,715 INFO L125 PetriNetUnfolderBase]: For 769083/769111 co-relation queries the response was YES. [2024-06-03 20:18:39,775 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47327 conditions, 6012 events. 3665/6012 cut-off events. For 769083/769111 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 39180 event pairs, 871 based on Foata normal form. 21/6017 useless extension candidates. Maximal degree in co-relation 47162. Up to 5448 conditions per place. [2024-06-03 20:18:39,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 374 selfloop transitions, 47 changer transitions 0/467 dead transitions. [2024-06-03 20:18:39,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 467 transitions, 6405 flow [2024-06-03 20:18:39,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:39,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:39,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 20:18:39,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 20:18:39,798 INFO L175 Difference]: Start difference. First operand has 371 places, 438 transitions, 5359 flow. Second operand 9 states and 172 transitions. [2024-06-03 20:18:39,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 467 transitions, 6405 flow [2024-06-03 20:18:42,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 467 transitions, 6293 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:18:42,076 INFO L231 Difference]: Finished difference. Result has 375 places, 440 transitions, 5402 flow [2024-06-03 20:18:42,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5247, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5402, PETRI_PLACES=375, PETRI_TRANSITIONS=440} [2024-06-03 20:18:42,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 332 predicate places. [2024-06-03 20:18:42,076 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 440 transitions, 5402 flow [2024-06-03 20:18:42,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:42,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:42,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:42,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:18:42,077 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:42,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:42,077 INFO L85 PathProgramCache]: Analyzing trace with hash 2088683141, now seen corresponding path program 4 times [2024-06-03 20:18:42,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:42,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378841648] [2024-06-03 20:18:42,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:42,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:42,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:43,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:43,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:43,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378841648] [2024-06-03 20:18:43,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378841648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:43,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:43,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:43,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784145673] [2024-06-03 20:18:43,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:43,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:43,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:43,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:43,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:43,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:43,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 440 transitions, 5402 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:43,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:43,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:43,157 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:44,715 INFO L124 PetriNetUnfolderBase]: 3736/6123 cut-off events. [2024-06-03 20:18:44,715 INFO L125 PetriNetUnfolderBase]: For 775752/775756 co-relation queries the response was YES. [2024-06-03 20:18:44,776 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48215 conditions, 6123 events. 3736/6123 cut-off events. For 775752/775756 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39994 event pairs, 884 based on Foata normal form. 21/6130 useless extension candidates. Maximal degree in co-relation 48049. Up to 5588 conditions per place. [2024-06-03 20:18:44,798 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 385 selfloop transitions, 35 changer transitions 0/466 dead transitions. [2024-06-03 20:18:44,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 466 transitions, 6440 flow [2024-06-03 20:18:44,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:18:44,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:18:44,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 20:18:44,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 20:18:44,799 INFO L175 Difference]: Start difference. First operand has 375 places, 440 transitions, 5402 flow. Second operand 9 states and 168 transitions. [2024-06-03 20:18:44,799 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 466 transitions, 6440 flow [2024-06-03 20:18:47,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 466 transitions, 6314 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-03 20:18:47,018 INFO L231 Difference]: Finished difference. Result has 376 places, 442 transitions, 5411 flow [2024-06-03 20:18:47,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5276, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5411, PETRI_PLACES=376, PETRI_TRANSITIONS=442} [2024-06-03 20:18:47,019 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 333 predicate places. [2024-06-03 20:18:47,019 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 442 transitions, 5411 flow [2024-06-03 20:18:47,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:47,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:47,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:47,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:18:47,019 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:47,020 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:47,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2088867839, now seen corresponding path program 1 times [2024-06-03 20:18:47,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:47,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510916628] [2024-06-03 20:18:47,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:47,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:47,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:47,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:47,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:47,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510916628] [2024-06-03 20:18:47,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510916628] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:47,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:47,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:47,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896359323] [2024-06-03 20:18:47,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:47,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:47,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:47,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:47,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:48,039 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:48,040 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 442 transitions, 5411 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:48,040 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:48,040 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:48,040 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:49,565 INFO L124 PetriNetUnfolderBase]: 3859/6254 cut-off events. [2024-06-03 20:18:49,565 INFO L125 PetriNetUnfolderBase]: For 696896/696896 co-relation queries the response was YES. [2024-06-03 20:18:49,631 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49198 conditions, 6254 events. 3859/6254 cut-off events. For 696896/696896 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40256 event pairs, 943 based on Foata normal form. 2/6254 useless extension candidates. Maximal degree in co-relation 49031. Up to 5966 conditions per place. [2024-06-03 20:18:49,654 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 427 selfloop transitions, 28 changer transitions 0/460 dead transitions. [2024-06-03 20:18:49,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 460 transitions, 6421 flow [2024-06-03 20:18:49,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:49,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:49,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 20:18:49,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 20:18:49,656 INFO L175 Difference]: Start difference. First operand has 376 places, 442 transitions, 5411 flow. Second operand 8 states and 142 transitions. [2024-06-03 20:18:49,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 460 transitions, 6421 flow [2024-06-03 20:18:52,123 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 460 transitions, 6342 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:18:52,128 INFO L231 Difference]: Finished difference. Result has 377 places, 444 transitions, 5447 flow [2024-06-03 20:18:52,128 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5332, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=414, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5447, PETRI_PLACES=377, PETRI_TRANSITIONS=444} [2024-06-03 20:18:52,129 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-03 20:18:52,129 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 444 transitions, 5447 flow [2024-06-03 20:18:52,129 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:52,129 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:52,129 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:52,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:18:52,129 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:52,130 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:52,130 INFO L85 PathProgramCache]: Analyzing trace with hash 1811126591, now seen corresponding path program 5 times [2024-06-03 20:18:52,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:52,130 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275449994] [2024-06-03 20:18:52,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:52,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:53,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:53,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:53,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275449994] [2024-06-03 20:18:53,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275449994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:53,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:53,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:18:53,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161980609] [2024-06-03 20:18:53,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:53,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:18:53,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:53,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:18:53,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:18:53,235 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 42 [2024-06-03 20:18:53,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 444 transitions, 5447 flow. Second operand has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:53,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:53,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 42 [2024-06-03 20:18:53,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:54,734 INFO L124 PetriNetUnfolderBase]: 3725/6112 cut-off events. [2024-06-03 20:18:54,735 INFO L125 PetriNetUnfolderBase]: For 705242/705246 co-relation queries the response was YES. [2024-06-03 20:18:54,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47090 conditions, 6112 events. 3725/6112 cut-off events. For 705242/705246 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 39958 event pairs, 861 based on Foata normal form. 13/6111 useless extension candidates. Maximal degree in co-relation 46922. Up to 5545 conditions per place. [2024-06-03 20:18:54,821 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 381 selfloop transitions, 48 changer transitions 0/475 dead transitions. [2024-06-03 20:18:54,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 475 transitions, 6641 flow [2024-06-03 20:18:54,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:18:54,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:18:54,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-03 20:18:54,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-03 20:18:54,822 INFO L175 Difference]: Start difference. First operand has 377 places, 444 transitions, 5447 flow. Second operand 8 states and 165 transitions. [2024-06-03 20:18:54,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 475 transitions, 6641 flow [2024-06-03 20:18:56,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 378 places, 475 transitions, 6534 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 20:18:56,812 INFO L231 Difference]: Finished difference. Result has 379 places, 444 transitions, 5446 flow [2024-06-03 20:18:56,812 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5340, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5446, PETRI_PLACES=379, PETRI_TRANSITIONS=444} [2024-06-03 20:18:56,812 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-03 20:18:56,812 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 444 transitions, 5446 flow [2024-06-03 20:18:56,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.7) internal successors, (127), 10 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:18:56,813 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:18:56,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:18:56,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:18:56,813 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:18:56,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:18:56,813 INFO L85 PathProgramCache]: Analyzing trace with hash 1817567399, now seen corresponding path program 2 times [2024-06-03 20:18:56,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:18:56,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514511541] [2024-06-03 20:18:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:18:56,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:18:56,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:18:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:18:57,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:18:57,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514511541] [2024-06-03 20:18:57,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514511541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:18:57,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:18:57,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:18:57,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690973483] [2024-06-03 20:18:57,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:18:57,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:18:57,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:18:57,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:18:57,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:18:57,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:18:57,827 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 444 transitions, 5446 flow. Second operand has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:18:57,827 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:18:57,827 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:18:57,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:18:59,187 INFO L124 PetriNetUnfolderBase]: 3849/6234 cut-off events. [2024-06-03 20:18:59,187 INFO L125 PetriNetUnfolderBase]: For 659876/659876 co-relation queries the response was YES. [2024-06-03 20:18:59,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48059 conditions, 6234 events. 3849/6234 cut-off events. For 659876/659876 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40146 event pairs, 923 based on Foata normal form. 2/6234 useless extension candidates. Maximal degree in co-relation 47890. Up to 5948 conditions per place. [2024-06-03 20:18:59,275 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 426 selfloop transitions, 28 changer transitions 0/459 dead transitions. [2024-06-03 20:18:59,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 459 transitions, 6448 flow [2024-06-03 20:18:59,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:18:59,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:18:59,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-03 20:18:59,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-03 20:18:59,276 INFO L175 Difference]: Start difference. First operand has 379 places, 444 transitions, 5446 flow. Second operand 6 states and 113 transitions. [2024-06-03 20:18:59,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 459 transitions, 6448 flow [2024-06-03 20:19:01,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 379 places, 459 transitions, 6370 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:01,426 INFO L231 Difference]: Finished difference. Result has 380 places, 446 transitions, 5491 flow [2024-06-03 20:19:01,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5368, PETRI_DIFFERENCE_MINUEND_PLACES=374, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=444, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5491, PETRI_PLACES=380, PETRI_TRANSITIONS=446} [2024-06-03 20:19:01,426 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 337 predicate places. [2024-06-03 20:19:01,427 INFO L495 AbstractCegarLoop]: Abstraction has has 380 places, 446 transitions, 5491 flow [2024-06-03 20:19:01,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.88888888888889) internal successors, (107), 9 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) [2024-06-03 20:19:01,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:01,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:01,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:19:01,427 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:01,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:01,428 INFO L85 PathProgramCache]: Analyzing trace with hash -923867269, now seen corresponding path program 3 times [2024-06-03 20:19:01,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:01,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437458649] [2024-06-03 20:19:01,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:01,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:01,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:02,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:02,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:02,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437458649] [2024-06-03 20:19:02,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437458649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:02,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:02,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:02,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758869579] [2024-06-03 20:19:02,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:02,215 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:02,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:02,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:02,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:02,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:02,291 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 380 places, 446 transitions, 5491 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:02,291 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:02,291 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:02,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:03,635 INFO L124 PetriNetUnfolderBase]: 3857/6258 cut-off events. [2024-06-03 20:19:03,636 INFO L125 PetriNetUnfolderBase]: For 671725/671725 co-relation queries the response was YES. [2024-06-03 20:19:03,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48256 conditions, 6258 events. 3857/6258 cut-off events. For 671725/671725 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 40356 event pairs, 940 based on Foata normal form. 2/6258 useless extension candidates. Maximal degree in co-relation 48086. Up to 5990 conditions per place. [2024-06-03 20:19:03,731 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 438 selfloop transitions, 15 changer transitions 0/458 dead transitions. [2024-06-03 20:19:03,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 458 transitions, 6481 flow [2024-06-03 20:19:03,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:03,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:03,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 20:19:03,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:19:03,732 INFO L175 Difference]: Start difference. First operand has 380 places, 446 transitions, 5491 flow. Second operand 6 states and 108 transitions. [2024-06-03 20:19:03,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 458 transitions, 6481 flow [2024-06-03 20:19:06,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 458 transitions, 6376 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:06,270 INFO L231 Difference]: Finished difference. Result has 382 places, 448 transitions, 5483 flow [2024-06-03 20:19:06,271 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5390, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5483, PETRI_PLACES=382, PETRI_TRANSITIONS=448} [2024-06-03 20:19:06,271 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-03 20:19:06,271 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 448 transitions, 5483 flow [2024-06-03 20:19:06,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:06,271 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:06,271 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:06,272 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:19:06,272 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:06,272 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:06,272 INFO L85 PathProgramCache]: Analyzing trace with hash -924164187, now seen corresponding path program 1 times [2024-06-03 20:19:06,272 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:06,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481167647] [2024-06-03 20:19:06,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:06,272 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:06,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:07,064 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:07,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:07,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481167647] [2024-06-03 20:19:07,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481167647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:07,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:07,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:07,065 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605806140] [2024-06-03 20:19:07,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:07,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:07,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:07,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:07,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:07,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:07,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 448 transitions, 5483 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:07,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:07,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:07,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:08,606 INFO L124 PetriNetUnfolderBase]: 3842/6219 cut-off events. [2024-06-03 20:19:08,606 INFO L125 PetriNetUnfolderBase]: For 660188/660188 co-relation queries the response was YES. [2024-06-03 20:19:08,670 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47798 conditions, 6219 events. 3842/6219 cut-off events. For 660188/660188 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 40001 event pairs, 944 based on Foata normal form. 1/6218 useless extension candidates. Maximal degree in co-relation 47627. Up to 5923 conditions per place. [2024-06-03 20:19:08,692 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 423 selfloop transitions, 36 changer transitions 0/464 dead transitions. [2024-06-03 20:19:08,692 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 464 transitions, 6455 flow [2024-06-03 20:19:08,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:08,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:08,693 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-03 20:19:08,693 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:19:08,693 INFO L175 Difference]: Start difference. First operand has 382 places, 448 transitions, 5483 flow. Second operand 6 states and 120 transitions. [2024-06-03 20:19:08,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 464 transitions, 6455 flow [2024-06-03 20:19:11,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 464 transitions, 6348 flow, removed 40 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:11,076 INFO L231 Difference]: Finished difference. Result has 384 places, 448 transitions, 5466 flow [2024-06-03 20:19:11,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5376, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5466, PETRI_PLACES=384, PETRI_TRANSITIONS=448} [2024-06-03 20:19:11,076 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-03 20:19:11,076 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 448 transitions, 5466 flow [2024-06-03 20:19:11,077 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:11,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:11,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:11,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:19:11,077 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:11,077 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:11,077 INFO L85 PathProgramCache]: Analyzing trace with hash -1153852549, now seen corresponding path program 4 times [2024-06-03 20:19:11,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:11,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161831872] [2024-06-03 20:19:11,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:11,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:11,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:11,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:11,988 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:11,988 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161831872] [2024-06-03 20:19:11,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161831872] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:11,988 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:11,988 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:11,988 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680170412] [2024-06-03 20:19:11,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:11,988 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:11,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:11,989 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:11,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:12,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:12,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 448 transitions, 5466 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:12,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:12,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:12,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:13,494 INFO L124 PetriNetUnfolderBase]: 3837/6216 cut-off events. [2024-06-03 20:19:13,494 INFO L125 PetriNetUnfolderBase]: For 665808/665808 co-relation queries the response was YES. [2024-06-03 20:19:13,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47603 conditions, 6216 events. 3837/6216 cut-off events. For 665808/665808 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 40002 event pairs, 921 based on Foata normal form. 2/6216 useless extension candidates. Maximal degree in co-relation 47431. Up to 5916 conditions per place. [2024-06-03 20:19:13,590 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 423 selfloop transitions, 35 changer transitions 0/463 dead transitions. [2024-06-03 20:19:13,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 463 transitions, 6480 flow [2024-06-03 20:19:13,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:19:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:19:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-03 20:19:13,591 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:19:13,591 INFO L175 Difference]: Start difference. First operand has 384 places, 448 transitions, 5466 flow. Second operand 6 states and 114 transitions. [2024-06-03 20:19:13,591 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 463 transitions, 6480 flow [2024-06-03 20:19:16,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 463 transitions, 6378 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:16,072 INFO L231 Difference]: Finished difference. Result has 383 places, 450 transitions, 5508 flow [2024-06-03 20:19:16,073 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5364, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=413, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5508, PETRI_PLACES=383, PETRI_TRANSITIONS=450} [2024-06-03 20:19:16,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 340 predicate places. [2024-06-03 20:19:16,073 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 450 transitions, 5508 flow [2024-06-03 20:19:16,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:16,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:16,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:16,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:19:16,074 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:16,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:16,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1542473665, now seen corresponding path program 1 times [2024-06-03 20:19:16,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:16,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106016070] [2024-06-03 20:19:16,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:16,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:16,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:16,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:16,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:16,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106016070] [2024-06-03 20:19:16,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106016070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:16,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:16,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:16,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905240822] [2024-06-03 20:19:16,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:16,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:16,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:16,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:16,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:17,009 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:17,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 450 transitions, 5508 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:17,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:17,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:17,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:18,477 INFO L124 PetriNetUnfolderBase]: 3863/6260 cut-off events. [2024-06-03 20:19:18,477 INFO L125 PetriNetUnfolderBase]: For 677761/677761 co-relation queries the response was YES. [2024-06-03 20:19:18,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48245 conditions, 6260 events. 3863/6260 cut-off events. For 677761/677761 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 40353 event pairs, 760 based on Foata normal form. 2/6260 useless extension candidates. Maximal degree in co-relation 48073. Up to 5827 conditions per place. [2024-06-03 20:19:18,569 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 410 selfloop transitions, 73 changer transitions 0/488 dead transitions. [2024-06-03 20:19:18,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 488 transitions, 6978 flow [2024-06-03 20:19:18,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:19:18,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:19:18,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 187 transitions. [2024-06-03 20:19:18,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4452380952380952 [2024-06-03 20:19:18,571 INFO L175 Difference]: Start difference. First operand has 383 places, 450 transitions, 5508 flow. Second operand 10 states and 187 transitions. [2024-06-03 20:19:18,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 488 transitions, 6978 flow [2024-06-03 20:19:20,823 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 488 transitions, 6860 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:20,829 INFO L231 Difference]: Finished difference. Result has 390 places, 458 transitions, 5757 flow [2024-06-03 20:19:20,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5392, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5757, PETRI_PLACES=390, PETRI_TRANSITIONS=458} [2024-06-03 20:19:20,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-03 20:19:20,829 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 458 transitions, 5757 flow [2024-06-03 20:19:20,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:20,830 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:20,830 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:20,830 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:19:20,830 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:20,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:20,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1973112906, now seen corresponding path program 1 times [2024-06-03 20:19:20,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:20,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435882480] [2024-06-03 20:19:20,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:20,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:20,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:21,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:21,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:21,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435882480] [2024-06-03 20:19:21,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1435882480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:21,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:21,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:21,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484732319] [2024-06-03 20:19:21,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:21,551 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:21,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:21,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:21,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:21,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:21,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 458 transitions, 5757 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:21,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:21,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:21,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:23,168 INFO L124 PetriNetUnfolderBase]: 3915/6330 cut-off events. [2024-06-03 20:19:23,168 INFO L125 PetriNetUnfolderBase]: For 721057/721057 co-relation queries the response was YES. [2024-06-03 20:19:23,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50433 conditions, 6330 events. 3915/6330 cut-off events. For 721057/721057 co-relation queries the response was YES. Maximal size of possible extension queue 455. Compared 40759 event pairs, 762 based on Foata normal form. 4/6332 useless extension candidates. Maximal degree in co-relation 50259. Up to 5756 conditions per place. [2024-06-03 20:19:23,263 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 410 selfloop transitions, 80 changer transitions 0/495 dead transitions. [2024-06-03 20:19:23,263 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 495 transitions, 7287 flow [2024-06-03 20:19:23,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:23,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:23,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-03 20:19:23,264 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-03 20:19:23,264 INFO L175 Difference]: Start difference. First operand has 390 places, 458 transitions, 5757 flow. Second operand 9 states and 175 transitions. [2024-06-03 20:19:23,264 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 495 transitions, 7287 flow [2024-06-03 20:19:25,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 495 transitions, 7107 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-03 20:19:25,347 INFO L231 Difference]: Finished difference. Result has 393 places, 464 transitions, 5921 flow [2024-06-03 20:19:25,348 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=381, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5921, PETRI_PLACES=393, PETRI_TRANSITIONS=464} [2024-06-03 20:19:25,348 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-03 20:19:25,348 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 464 transitions, 5921 flow [2024-06-03 20:19:25,348 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:25,348 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:25,348 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:25,348 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:19:25,349 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:25,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:25,349 INFO L85 PathProgramCache]: Analyzing trace with hash -420840570, now seen corresponding path program 2 times [2024-06-03 20:19:25,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:25,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272314372] [2024-06-03 20:19:25,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:25,349 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:26,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:26,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:26,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272314372] [2024-06-03 20:19:26,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272314372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:26,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:26,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:26,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1818412948] [2024-06-03 20:19:26,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:26,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:26,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:26,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:26,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:26,164 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:26,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 464 transitions, 5921 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:26,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:26,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:26,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:27,817 INFO L124 PetriNetUnfolderBase]: 3967/6400 cut-off events. [2024-06-03 20:19:27,817 INFO L125 PetriNetUnfolderBase]: For 765155/765155 co-relation queries the response was YES. [2024-06-03 20:19:27,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52327 conditions, 6400 events. 3967/6400 cut-off events. For 765155/765155 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41225 event pairs, 758 based on Foata normal form. 4/6402 useless extension candidates. Maximal degree in co-relation 52151. Up to 5933 conditions per place. [2024-06-03 20:19:27,906 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 427 selfloop transitions, 68 changer transitions 0/500 dead transitions. [2024-06-03 20:19:27,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 500 transitions, 7478 flow [2024-06-03 20:19:27,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:27,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:19:27,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-03 20:19:27,908 INFO L175 Difference]: Start difference. First operand has 393 places, 464 transitions, 5921 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:19:27,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 500 transitions, 7478 flow [2024-06-03 20:19:30,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 500 transitions, 7258 flow, removed 73 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:30,727 INFO L231 Difference]: Finished difference. Result has 397 places, 470 transitions, 6033 flow [2024-06-03 20:19:30,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=399, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6033, PETRI_PLACES=397, PETRI_TRANSITIONS=470} [2024-06-03 20:19:30,728 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-03 20:19:30,728 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 470 transitions, 6033 flow [2024-06-03 20:19:30,728 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:30,728 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:30,728 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:30,728 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:19:30,728 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:30,729 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:30,729 INFO L85 PathProgramCache]: Analyzing trace with hash -420834990, now seen corresponding path program 3 times [2024-06-03 20:19:30,729 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:30,729 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301192712] [2024-06-03 20:19:30,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:30,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:30,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:31,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:31,566 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:31,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301192712] [2024-06-03 20:19:31,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301192712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:31,566 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:31,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:31,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023822657] [2024-06-03 20:19:31,567 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:31,567 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:31,567 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:31,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:31,567 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:31,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:31,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 470 transitions, 6033 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:31,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:31,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:31,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:33,342 INFO L124 PetriNetUnfolderBase]: 3955/6384 cut-off events. [2024-06-03 20:19:33,342 INFO L125 PetriNetUnfolderBase]: For 752383/752383 co-relation queries the response was YES. [2024-06-03 20:19:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51681 conditions, 6384 events. 3955/6384 cut-off events. For 752383/752383 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41176 event pairs, 764 based on Foata normal form. 4/6386 useless extension candidates. Maximal degree in co-relation 51503. Up to 5925 conditions per place. [2024-06-03 20:19:33,434 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 427 selfloop transitions, 70 changer transitions 0/502 dead transitions. [2024-06-03 20:19:33,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 502 transitions, 7222 flow [2024-06-03 20:19:33,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:19:33,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:19:33,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 200 transitions. [2024-06-03 20:19:33,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329004329004329 [2024-06-03 20:19:33,436 INFO L175 Difference]: Start difference. First operand has 397 places, 470 transitions, 6033 flow. Second operand 11 states and 200 transitions. [2024-06-03 20:19:33,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 502 transitions, 7222 flow [2024-06-03 20:19:36,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 502 transitions, 7044 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:36,276 INFO L231 Difference]: Finished difference. Result has 403 places, 470 transitions, 6001 flow [2024-06-03 20:19:36,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5855, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6001, PETRI_PLACES=403, PETRI_TRANSITIONS=470} [2024-06-03 20:19:36,276 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-03 20:19:36,276 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 470 transitions, 6001 flow [2024-06-03 20:19:36,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:36,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:36,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:36,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:19:36,277 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:36,277 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:36,277 INFO L85 PathProgramCache]: Analyzing trace with hash 2026865773, now seen corresponding path program 2 times [2024-06-03 20:19:36,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:36,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025066204] [2024-06-03 20:19:36,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:36,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:36,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:37,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:37,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:37,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025066204] [2024-06-03 20:19:37,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025066204] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:37,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:37,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:37,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1584740113] [2024-06-03 20:19:37,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:37,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:37,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:37,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:37,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:37,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:37,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 470 transitions, 6001 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:37,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:37,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:37,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:39,033 INFO L124 PetriNetUnfolderBase]: 3965/6398 cut-off events. [2024-06-03 20:19:39,033 INFO L125 PetriNetUnfolderBase]: For 751682/751682 co-relation queries the response was YES. [2024-06-03 20:19:39,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51863 conditions, 6398 events. 3965/6398 cut-off events. For 751682/751682 co-relation queries the response was YES. Maximal size of possible extension queue 463. Compared 41208 event pairs, 765 based on Foata normal form. 2/6398 useless extension candidates. Maximal degree in co-relation 51683. Up to 6071 conditions per place. [2024-06-03 20:19:39,143 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 446 selfloop transitions, 45 changer transitions 0/496 dead transitions. [2024-06-03 20:19:39,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 496 transitions, 7148 flow [2024-06-03 20:19:39,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:39,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:39,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:19:39,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 20:19:39,145 INFO L175 Difference]: Start difference. First operand has 403 places, 470 transitions, 6001 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:19:39,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 496 transitions, 7148 flow [2024-06-03 20:19:41,888 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 496 transitions, 6993 flow, removed 5 selfloop flow, removed 10 redundant places. [2024-06-03 20:19:41,893 INFO L231 Difference]: Finished difference. Result has 402 places, 474 transitions, 6029 flow [2024-06-03 20:19:41,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5846, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=470, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=425, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6029, PETRI_PLACES=402, PETRI_TRANSITIONS=474} [2024-06-03 20:19:41,894 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-03 20:19:41,894 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 474 transitions, 6029 flow [2024-06-03 20:19:41,894 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:41,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:41,894 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:41,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:19:41,894 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:41,895 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:41,895 INFO L85 PathProgramCache]: Analyzing trace with hash 775269254, now seen corresponding path program 4 times [2024-06-03 20:19:41,895 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:41,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902986740] [2024-06-03 20:19:41,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:41,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:41,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:42,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:42,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:42,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902986740] [2024-06-03 20:19:42,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902986740] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:42,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:42,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:42,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835364854] [2024-06-03 20:19:42,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:42,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:42,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:42,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:42,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:42,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:42,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 474 transitions, 6029 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:42,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:42,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:42,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:44,403 INFO L124 PetriNetUnfolderBase]: 4017/6478 cut-off events. [2024-06-03 20:19:44,404 INFO L125 PetriNetUnfolderBase]: For 800872/800872 co-relation queries the response was YES. [2024-06-03 20:19:44,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53046 conditions, 6478 events. 4017/6478 cut-off events. For 800872/800872 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41794 event pairs, 778 based on Foata normal form. 4/6480 useless extension candidates. Maximal degree in co-relation 52865. Up to 6092 conditions per place. [2024-06-03 20:19:44,501 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 453 selfloop transitions, 47 changer transitions 0/505 dead transitions. [2024-06-03 20:19:44,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 505 transitions, 7534 flow [2024-06-03 20:19:44,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:44,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:44,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:19:44,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:19:44,502 INFO L175 Difference]: Start difference. First operand has 402 places, 474 transitions, 6029 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:19:44,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 505 transitions, 7534 flow [2024-06-03 20:19:47,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 505 transitions, 7391 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-03 20:19:47,092 INFO L231 Difference]: Finished difference. Result has 404 places, 480 transitions, 6144 flow [2024-06-03 20:19:47,092 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5886, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=430, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6144, PETRI_PLACES=404, PETRI_TRANSITIONS=480} [2024-06-03 20:19:47,093 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-03 20:19:47,093 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 480 transitions, 6144 flow [2024-06-03 20:19:47,093 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:47,093 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:47,093 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:47,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:19:47,093 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:47,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:47,094 INFO L85 PathProgramCache]: Analyzing trace with hash -1064626657, now seen corresponding path program 1 times [2024-06-03 20:19:47,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:47,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149084085] [2024-06-03 20:19:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:47,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:47,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:47,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:47,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149084085] [2024-06-03 20:19:47,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149084085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:47,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:47,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:47,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [936837618] [2024-06-03 20:19:47,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:47,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:47,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:47,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:47,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:47,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:47,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 480 transitions, 6144 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:47,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:47,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:47,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:49,520 INFO L124 PetriNetUnfolderBase]: 4027/6486 cut-off events. [2024-06-03 20:19:49,520 INFO L125 PetriNetUnfolderBase]: For 802253/802253 co-relation queries the response was YES. [2024-06-03 20:19:49,594 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53320 conditions, 6486 events. 4027/6486 cut-off events. For 802253/802253 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 41807 event pairs, 770 based on Foata normal form. 2/6486 useless extension candidates. Maximal degree in co-relation 53138. Up to 6168 conditions per place. [2024-06-03 20:19:49,619 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 43 changer transitions 0/509 dead transitions. [2024-06-03 20:19:49,620 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 411 places, 509 transitions, 7400 flow [2024-06-03 20:19:49,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:19:49,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:19:49,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 20:19:49,621 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 20:19:49,621 INFO L175 Difference]: Start difference. First operand has 404 places, 480 transitions, 6144 flow. Second operand 8 states and 148 transitions. [2024-06-03 20:19:49,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 411 places, 509 transitions, 7400 flow [2024-06-03 20:19:52,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 509 transitions, 7274 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 20:19:52,526 INFO L231 Difference]: Finished difference. Result has 409 places, 491 transitions, 6338 flow [2024-06-03 20:19:52,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6018, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6338, PETRI_PLACES=409, PETRI_TRANSITIONS=491} [2024-06-03 20:19:52,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-03 20:19:52,527 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 491 transitions, 6338 flow [2024-06-03 20:19:52,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:52,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:52,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:52,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:19:52,528 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:52,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:52,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1071991699, now seen corresponding path program 3 times [2024-06-03 20:19:52,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:52,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753232660] [2024-06-03 20:19:52,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:52,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:52,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:53,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:53,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:53,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753232660] [2024-06-03 20:19:53,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753232660] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:53,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:53,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:53,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587667755] [2024-06-03 20:19:53,397 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:53,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:53,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:53,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:53,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:53,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:53,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 491 transitions, 6338 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:53,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:53,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:53,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:19:55,127 INFO L124 PetriNetUnfolderBase]: 4037/6490 cut-off events. [2024-06-03 20:19:55,127 INFO L125 PetriNetUnfolderBase]: For 819331/819331 co-relation queries the response was YES. [2024-06-03 20:19:55,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54292 conditions, 6490 events. 4037/6490 cut-off events. For 819331/819331 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 41704 event pairs, 780 based on Foata normal form. 2/6490 useless extension candidates. Maximal degree in co-relation 54106. Up to 6208 conditions per place. [2024-06-03 20:19:55,239 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 477 selfloop transitions, 32 changer transitions 0/514 dead transitions. [2024-06-03 20:19:55,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 514 transitions, 7523 flow [2024-06-03 20:19:55,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:19:55,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:19:55,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:19:55,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:19:55,242 INFO L175 Difference]: Start difference. First operand has 409 places, 491 transitions, 6338 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:19:55,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 514 transitions, 7523 flow [2024-06-03 20:19:58,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 514 transitions, 7377 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 20:19:58,395 INFO L231 Difference]: Finished difference. Result has 414 places, 495 transitions, 6357 flow [2024-06-03 20:19:58,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6192, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6357, PETRI_PLACES=414, PETRI_TRANSITIONS=495} [2024-06-03 20:19:58,396 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 371 predicate places. [2024-06-03 20:19:58,396 INFO L495 AbstractCegarLoop]: Abstraction has has 414 places, 495 transitions, 6357 flow [2024-06-03 20:19:58,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:58,397 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:19:58,397 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:19:58,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:19:58,399 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:19:58,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:19:58,399 INFO L85 PathProgramCache]: Analyzing trace with hash 782626484, now seen corresponding path program 5 times [2024-06-03 20:19:58,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:19:58,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992380544] [2024-06-03 20:19:58,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:19:58,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:19:58,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:19:59,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:19:59,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:19:59,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992380544] [2024-06-03 20:19:59,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992380544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:19:59,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:19:59,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:19:59,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653804761] [2024-06-03 20:19:59,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:19:59,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:19:59,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:19:59,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:19:59,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:19:59,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:19:59,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 414 places, 495 transitions, 6357 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:19:59,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:19:59,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:19:59,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:00,830 INFO L124 PetriNetUnfolderBase]: 4057/6516 cut-off events. [2024-06-03 20:20:00,830 INFO L125 PetriNetUnfolderBase]: For 846152/846152 co-relation queries the response was YES. [2024-06-03 20:20:00,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54565 conditions, 6516 events. 4057/6516 cut-off events. For 846152/846152 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 41837 event pairs, 775 based on Foata normal form. 4/6518 useless extension candidates. Maximal degree in co-relation 54378. Up to 6210 conditions per place. [2024-06-03 20:20:00,941 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 478 selfloop transitions, 36 changer transitions 0/519 dead transitions. [2024-06-03 20:20:00,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 519 transitions, 7561 flow [2024-06-03 20:20:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:20:00,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-03 20:20:00,942 INFO L175 Difference]: Start difference. First operand has 414 places, 495 transitions, 6357 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:20:00,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 519 transitions, 7561 flow [2024-06-03 20:20:04,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 416 places, 519 transitions, 7448 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:04,014 INFO L231 Difference]: Finished difference. Result has 417 places, 498 transitions, 6394 flow [2024-06-03 20:20:04,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6244, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=495, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6394, PETRI_PLACES=417, PETRI_TRANSITIONS=498} [2024-06-03 20:20:04,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-03 20:20:04,015 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 498 transitions, 6394 flow [2024-06-03 20:20:04,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:04,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:04,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:04,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:20:04,015 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:04,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:04,016 INFO L85 PathProgramCache]: Analyzing trace with hash 775274834, now seen corresponding path program 6 times [2024-06-03 20:20:04,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:04,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682203090] [2024-06-03 20:20:04,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:04,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:04,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:04,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:04,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:04,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682203090] [2024-06-03 20:20:04,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682203090] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:04,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:04,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:04,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981269970] [2024-06-03 20:20:04,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:04,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:04,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:04,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:04,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:04,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:04,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 498 transitions, 6394 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:04,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:04,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:04,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:06,530 INFO L124 PetriNetUnfolderBase]: 4045/6498 cut-off events. [2024-06-03 20:20:06,531 INFO L125 PetriNetUnfolderBase]: For 835926/835926 co-relation queries the response was YES. [2024-06-03 20:20:06,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54058 conditions, 6498 events. 4045/6498 cut-off events. For 835926/835926 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 41721 event pairs, 775 based on Foata normal form. 4/6500 useless extension candidates. Maximal degree in co-relation 53870. Up to 6128 conditions per place. [2024-06-03 20:20:06,639 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 468 selfloop transitions, 49 changer transitions 0/522 dead transitions. [2024-06-03 20:20:06,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 522 transitions, 7575 flow [2024-06-03 20:20:06,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:06,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:06,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:20:06,640 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:20:06,641 INFO L175 Difference]: Start difference. First operand has 417 places, 498 transitions, 6394 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:20:06,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 522 transitions, 7575 flow [2024-06-03 20:20:10,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 418 places, 522 transitions, 7421 flow, removed 43 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:10,258 INFO L231 Difference]: Finished difference. Result has 419 places, 498 transitions, 6344 flow [2024-06-03 20:20:10,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6240, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6344, PETRI_PLACES=419, PETRI_TRANSITIONS=498} [2024-06-03 20:20:10,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 376 predicate places. [2024-06-03 20:20:10,263 INFO L495 AbstractCegarLoop]: Abstraction has has 419 places, 498 transitions, 6344 flow [2024-06-03 20:20:10,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:10,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:10,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:10,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:20:10,264 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:10,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:10,264 INFO L85 PathProgramCache]: Analyzing trace with hash 1766268657, now seen corresponding path program 4 times [2024-06-03 20:20:10,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:10,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915067505] [2024-06-03 20:20:10,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:10,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:10,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:11,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:11,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:11,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915067505] [2024-06-03 20:20:11,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915067505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:11,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:11,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:11,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404610415] [2024-06-03 20:20:11,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:11,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:11,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:11,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:11,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:11,255 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:11,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 419 places, 498 transitions, 6344 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:11,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:11,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:11,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:12,899 INFO L124 PetriNetUnfolderBase]: 4079/6542 cut-off events. [2024-06-03 20:20:12,899 INFO L125 PetriNetUnfolderBase]: For 857614/857614 co-relation queries the response was YES. [2024-06-03 20:20:12,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54903 conditions, 6542 events. 4079/6542 cut-off events. For 857614/857614 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 42019 event pairs, 786 based on Foata normal form. 2/6533 useless extension candidates. Maximal degree in co-relation 54714. Up to 5691 conditions per place. [2024-06-03 20:20:13,027 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 349 selfloop transitions, 201 changer transitions 0/555 dead transitions. [2024-06-03 20:20:13,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 555 transitions, 8772 flow [2024-06-03 20:20:13,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:20:13,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:20:13,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 211 transitions. [2024-06-03 20:20:13,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45670995670995673 [2024-06-03 20:20:13,028 INFO L175 Difference]: Start difference. First operand has 419 places, 498 transitions, 6344 flow. Second operand 11 states and 211 transitions. [2024-06-03 20:20:13,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 555 transitions, 8772 flow [2024-06-03 20:20:16,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 555 transitions, 8649 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:20:16,096 INFO L231 Difference]: Finished difference. Result has 425 places, 521 transitions, 7315 flow [2024-06-03 20:20:16,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=498, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7315, PETRI_PLACES=425, PETRI_TRANSITIONS=521} [2024-06-03 20:20:16,096 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-03 20:20:16,097 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 521 transitions, 7315 flow [2024-06-03 20:20:16,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:16,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:16,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:16,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:20:16,097 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:16,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:16,097 INFO L85 PathProgramCache]: Analyzing trace with hash 958907115, now seen corresponding path program 5 times [2024-06-03 20:20:16,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:16,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1924478157] [2024-06-03 20:20:16,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:16,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:16,933 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:16,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:16,934 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1924478157] [2024-06-03 20:20:16,934 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1924478157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:16,934 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:16,934 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:16,934 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670135354] [2024-06-03 20:20:16,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:16,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:16,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:16,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:16,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:17,050 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:17,050 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 521 transitions, 7315 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:17,050 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:17,050 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:17,051 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:18,610 INFO L124 PetriNetUnfolderBase]: 4102/6580 cut-off events. [2024-06-03 20:20:18,611 INFO L125 PetriNetUnfolderBase]: For 887511/887511 co-relation queries the response was YES. [2024-06-03 20:20:18,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57629 conditions, 6580 events. 4102/6580 cut-off events. For 887511/887511 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 42287 event pairs, 779 based on Foata normal form. 1/6575 useless extension candidates. Maximal degree in co-relation 57436. Up to 6070 conditions per place. [2024-06-03 20:20:18,721 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 461 selfloop transitions, 129 changer transitions 0/595 dead transitions. [2024-06-03 20:20:18,721 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 595 transitions, 9883 flow [2024-06-03 20:20:18,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:18,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:18,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 20:20:18,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 20:20:18,722 INFO L175 Difference]: Start difference. First operand has 425 places, 521 transitions, 7315 flow. Second operand 9 states and 167 transitions. [2024-06-03 20:20:18,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 595 transitions, 9883 flow [2024-06-03 20:20:22,005 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 595 transitions, 9401 flow, removed 173 selfloop flow, removed 6 redundant places. [2024-06-03 20:20:22,015 INFO L231 Difference]: Finished difference. Result has 430 places, 572 transitions, 8145 flow [2024-06-03 20:20:22,015 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8145, PETRI_PLACES=430, PETRI_TRANSITIONS=572} [2024-06-03 20:20:22,028 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 387 predicate places. [2024-06-03 20:20:22,036 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 572 transitions, 8145 flow [2024-06-03 20:20:22,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:22,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:22,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:22,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:20:22,037 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:22,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:22,037 INFO L85 PathProgramCache]: Analyzing trace with hash 661517450, now seen corresponding path program 7 times [2024-06-03 20:20:22,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:22,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915126730] [2024-06-03 20:20:22,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:22,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:22,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:22,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:22,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915126730] [2024-06-03 20:20:22,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915126730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:22,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:22,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:22,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543257109] [2024-06-03 20:20:22,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:22,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:22,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:22,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:22,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 572 transitions, 8145 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:22,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:22,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:22,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:24,546 INFO L124 PetriNetUnfolderBase]: 4178/6689 cut-off events. [2024-06-03 20:20:24,546 INFO L125 PetriNetUnfolderBase]: For 974016/974016 co-relation queries the response was YES. [2024-06-03 20:20:24,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60234 conditions, 6689 events. 4178/6689 cut-off events. For 974016/974016 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 42953 event pairs, 757 based on Foata normal form. 4/6687 useless extension candidates. Maximal degree in co-relation 60038. Up to 5598 conditions per place. [2024-06-03 20:20:24,661 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 416 selfloop transitions, 193 changer transitions 0/614 dead transitions. [2024-06-03 20:20:24,662 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 614 transitions, 10409 flow [2024-06-03 20:20:24,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:24,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:24,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 20:20:24,663 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-03 20:20:24,663 INFO L175 Difference]: Start difference. First operand has 430 places, 572 transitions, 8145 flow. Second operand 9 states and 178 transitions. [2024-06-03 20:20:24,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 614 transitions, 10409 flow [2024-06-03 20:20:28,191 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 436 places, 614 transitions, 10258 flow, removed 67 selfloop flow, removed 2 redundant places. [2024-06-03 20:20:28,198 INFO L231 Difference]: Finished difference. Result has 437 places, 581 transitions, 8753 flow [2024-06-03 20:20:28,199 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8054, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8753, PETRI_PLACES=437, PETRI_TRANSITIONS=581} [2024-06-03 20:20:28,199 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 20:20:28,199 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 581 transitions, 8753 flow [2024-06-03 20:20:28,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:28,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:28,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:28,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:20:28,200 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:28,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:28,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1299845867, now seen corresponding path program 6 times [2024-06-03 20:20:28,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:28,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593243307] [2024-06-03 20:20:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:28,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:28,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:29,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:29,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:29,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593243307] [2024-06-03 20:20:29,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1593243307] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:29,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:29,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:29,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885436424] [2024-06-03 20:20:29,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:29,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:29,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:29,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:29,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:29,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:29,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 581 transitions, 8753 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:29,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:29,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:29,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:31,156 INFO L124 PetriNetUnfolderBase]: 4175/6687 cut-off events. [2024-06-03 20:20:31,156 INFO L125 PetriNetUnfolderBase]: For 965085/965085 co-relation queries the response was YES. [2024-06-03 20:20:31,232 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60819 conditions, 6687 events. 4175/6687 cut-off events. For 965085/965085 co-relation queries the response was YES. Maximal size of possible extension queue 494. Compared 43010 event pairs, 785 based on Foata normal form. 1/6682 useless extension candidates. Maximal degree in co-relation 60621. Up to 6261 conditions per place. [2024-06-03 20:20:31,259 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 517 selfloop transitions, 88 changer transitions 0/610 dead transitions. [2024-06-03 20:20:31,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 610 transitions, 10332 flow [2024-06-03 20:20:31,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:31,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:31,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:20:31,260 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:20:31,260 INFO L175 Difference]: Start difference. First operand has 437 places, 581 transitions, 8753 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:20:31,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 610 transitions, 10332 flow [2024-06-03 20:20:34,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 441 places, 610 transitions, 10029 flow, removed 96 selfloop flow, removed 4 redundant places. [2024-06-03 20:20:34,870 INFO L231 Difference]: Finished difference. Result has 443 places, 585 transitions, 8708 flow [2024-06-03 20:20:34,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8464, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8708, PETRI_PLACES=443, PETRI_TRANSITIONS=585} [2024-06-03 20:20:34,871 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 400 predicate places. [2024-06-03 20:20:34,871 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 585 transitions, 8708 flow [2024-06-03 20:20:34,871 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:34,871 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:34,871 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:34,871 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:20:34,871 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:34,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:34,872 INFO L85 PathProgramCache]: Analyzing trace with hash 1045598925, now seen corresponding path program 7 times [2024-06-03 20:20:34,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:34,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117471825] [2024-06-03 20:20:34,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:34,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:34,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:35,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:35,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:35,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117471825] [2024-06-03 20:20:35,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117471825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:35,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:35,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:35,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724298716] [2024-06-03 20:20:35,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:35,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:35,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:35,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:35,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:35,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:35,914 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 585 transitions, 8708 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:35,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:35,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:35,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:37,723 INFO L124 PetriNetUnfolderBase]: 4211/6739 cut-off events. [2024-06-03 20:20:37,723 INFO L125 PetriNetUnfolderBase]: For 995136/995136 co-relation queries the response was YES. [2024-06-03 20:20:37,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61446 conditions, 6739 events. 4211/6739 cut-off events. For 995136/995136 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 43361 event pairs, 787 based on Foata normal form. 2/6735 useless extension candidates. Maximal degree in co-relation 61245. Up to 6159 conditions per place. [2024-06-03 20:20:37,836 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 449 selfloop transitions, 174 changer transitions 0/628 dead transitions. [2024-06-03 20:20:37,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 628 transitions, 10644 flow [2024-06-03 20:20:37,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:20:37,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:20:37,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 182 transitions. [2024-06-03 20:20:37,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 20:20:37,837 INFO L175 Difference]: Start difference. First operand has 443 places, 585 transitions, 8708 flow. Second operand 10 states and 182 transitions. [2024-06-03 20:20:37,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 628 transitions, 10644 flow [2024-06-03 20:20:41,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 628 transitions, 10435 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:20:41,533 INFO L231 Difference]: Finished difference. Result has 449 places, 604 transitions, 9290 flow [2024-06-03 20:20:41,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8516, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9290, PETRI_PLACES=449, PETRI_TRANSITIONS=604} [2024-06-03 20:20:41,533 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 406 predicate places. [2024-06-03 20:20:41,533 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 604 transitions, 9290 flow [2024-06-03 20:20:41,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:41,539 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:41,539 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:41,540 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:20:41,540 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:41,540 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:41,540 INFO L85 PathProgramCache]: Analyzing trace with hash 1299936077, now seen corresponding path program 8 times [2024-06-03 20:20:41,540 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:41,540 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151411407] [2024-06-03 20:20:41,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:41,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:41,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:42,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:42,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151411407] [2024-06-03 20:20:42,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1151411407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:42,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:42,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:42,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953556415] [2024-06-03 20:20:42,524 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:42,524 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:42,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:42,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:42,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:42,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:42,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 604 transitions, 9290 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:42,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:42,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:42,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:44,398 INFO L124 PetriNetUnfolderBase]: 4205/6733 cut-off events. [2024-06-03 20:20:44,398 INFO L125 PetriNetUnfolderBase]: For 996888/996888 co-relation queries the response was YES. [2024-06-03 20:20:44,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61444 conditions, 6733 events. 4205/6733 cut-off events. For 996888/996888 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 43347 event pairs, 783 based on Foata normal form. 2/6729 useless extension candidates. Maximal degree in co-relation 61242. Up to 6176 conditions per place. [2024-06-03 20:20:44,521 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 479 selfloop transitions, 142 changer transitions 0/626 dead transitions. [2024-06-03 20:20:44,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 626 transitions, 10604 flow [2024-06-03 20:20:44,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:44,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:44,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:20:44,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:20:44,523 INFO L175 Difference]: Start difference. First operand has 449 places, 604 transitions, 9290 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:20:44,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 626 transitions, 10604 flow [2024-06-03 20:20:48,430 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 626 transitions, 10105 flow, removed 94 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:48,438 INFO L231 Difference]: Finished difference. Result has 451 places, 604 transitions, 9085 flow [2024-06-03 20:20:48,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8791, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9085, PETRI_PLACES=451, PETRI_TRANSITIONS=604} [2024-06-03 20:20:48,439 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-03 20:20:48,439 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 604 transitions, 9085 flow [2024-06-03 20:20:48,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:48,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:48,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:48,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:20:48,439 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:48,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:48,440 INFO L85 PathProgramCache]: Analyzing trace with hash 1299936232, now seen corresponding path program 8 times [2024-06-03 20:20:48,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:48,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763822468] [2024-06-03 20:20:48,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:48,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:48,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:49,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:49,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763822468] [2024-06-03 20:20:49,175 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763822468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:49,175 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:49,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:49,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697191181] [2024-06-03 20:20:49,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:49,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:49,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:49,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:49,176 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:49,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:49,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 604 transitions, 9085 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:49,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:49,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:49,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:50,986 INFO L124 PetriNetUnfolderBase]: 4225/6759 cut-off events. [2024-06-03 20:20:50,986 INFO L125 PetriNetUnfolderBase]: For 1027379/1027379 co-relation queries the response was YES. [2024-06-03 20:20:51,080 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61714 conditions, 6759 events. 4225/6759 cut-off events. For 1027379/1027379 co-relation queries the response was YES. Maximal size of possible extension queue 503. Compared 43493 event pairs, 769 based on Foata normal form. 4/6757 useless extension candidates. Maximal degree in co-relation 61511. Up to 5652 conditions per place. [2024-06-03 20:20:51,112 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 452 selfloop transitions, 183 changer transitions 0/640 dead transitions. [2024-06-03 20:20:51,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 640 transitions, 11385 flow [2024-06-03 20:20:51,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:20:51,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:20:51,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 180 transitions. [2024-06-03 20:20:51,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:20:51,114 INFO L175 Difference]: Start difference. First operand has 451 places, 604 transitions, 9085 flow. Second operand 9 states and 180 transitions. [2024-06-03 20:20:51,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 640 transitions, 11385 flow [2024-06-03 20:20:55,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 452 places, 640 transitions, 11099 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:20:55,508 INFO L231 Difference]: Finished difference. Result has 453 places, 607 transitions, 9266 flow [2024-06-03 20:20:55,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8799, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=180, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9266, PETRI_PLACES=453, PETRI_TRANSITIONS=607} [2024-06-03 20:20:55,509 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 410 predicate places. [2024-06-03 20:20:55,509 INFO L495 AbstractCegarLoop]: Abstraction has has 453 places, 607 transitions, 9266 flow [2024-06-03 20:20:55,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:55,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:20:55,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:20:55,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:20:55,510 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:20:55,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:20:55,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1303660882, now seen corresponding path program 9 times [2024-06-03 20:20:55,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:20:55,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173467037] [2024-06-03 20:20:55,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:20:55,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:20:55,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:20:56,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:20:56,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:20:56,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173467037] [2024-06-03 20:20:56,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173467037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:20:56,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:20:56,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:20:56,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [980749263] [2024-06-03 20:20:56,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:20:56,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:20:56,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:20:56,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:20:56,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:20:56,387 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:20:56,387 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 453 places, 607 transitions, 9266 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:20:56,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:20:56,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:20:56,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:20:58,519 INFO L124 PetriNetUnfolderBase]: 4277/6849 cut-off events. [2024-06-03 20:20:58,519 INFO L125 PetriNetUnfolderBase]: For 1078041/1078041 co-relation queries the response was YES. [2024-06-03 20:20:58,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63631 conditions, 6849 events. 4277/6849 cut-off events. For 1078041/1078041 co-relation queries the response was YES. Maximal size of possible extension queue 509. Compared 44266 event pairs, 757 based on Foata normal form. 4/6847 useless extension candidates. Maximal degree in co-relation 63427. Up to 6198 conditions per place. [2024-06-03 20:20:58,626 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 527 selfloop transitions, 114 changer transitions 0/646 dead transitions. [2024-06-03 20:20:58,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 646 transitions, 11246 flow [2024-06-03 20:20:58,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:20:58,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:20:58,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 202 transitions. [2024-06-03 20:20:58,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43722943722943725 [2024-06-03 20:20:58,627 INFO L175 Difference]: Start difference. First operand has 453 places, 607 transitions, 9266 flow. Second operand 11 states and 202 transitions. [2024-06-03 20:20:58,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 646 transitions, 11246 flow [2024-06-03 20:21:02,462 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 646 transitions, 10635 flow, removed 80 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:02,469 INFO L231 Difference]: Finished difference. Result has 457 places, 613 transitions, 9095 flow [2024-06-03 20:21:02,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8719, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=607, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9095, PETRI_PLACES=457, PETRI_TRANSITIONS=613} [2024-06-03 20:21:02,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-03 20:21:02,470 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 613 transitions, 9095 flow [2024-06-03 20:21:02,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:02,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:02,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:02,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:21:02,471 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:02,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:02,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1303655147, now seen corresponding path program 9 times [2024-06-03 20:21:02,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:02,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1565213991] [2024-06-03 20:21:02,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:02,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:02,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:03,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:03,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:03,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1565213991] [2024-06-03 20:21:03,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1565213991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:03,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:03,504 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:03,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [453202443] [2024-06-03 20:21:03,504 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:03,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:03,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:03,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:03,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:03,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:03,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 613 transitions, 9095 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:03,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:03,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:03,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:05,482 INFO L124 PetriNetUnfolderBase]: 4287/6861 cut-off events. [2024-06-03 20:21:05,482 INFO L125 PetriNetUnfolderBase]: For 1073264/1073264 co-relation queries the response was YES. [2024-06-03 20:21:05,571 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63087 conditions, 6861 events. 4287/6861 cut-off events. For 1073264/1073264 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 44304 event pairs, 807 based on Foata normal form. 2/6857 useless extension candidates. Maximal degree in co-relation 62882. Up to 6466 conditions per place. [2024-06-03 20:21:05,601 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 561 selfloop transitions, 73 changer transitions 0/639 dead transitions. [2024-06-03 20:21:05,601 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 465 places, 639 transitions, 10594 flow [2024-06-03 20:21:05,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:05,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:05,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 20:21:05,602 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 20:21:05,602 INFO L175 Difference]: Start difference. First operand has 457 places, 613 transitions, 9095 flow. Second operand 9 states and 163 transitions. [2024-06-03 20:21:05,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 465 places, 639 transitions, 10594 flow [2024-06-03 20:21:09,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 458 places, 639 transitions, 10393 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-03 20:21:09,515 INFO L231 Difference]: Finished difference. Result has 459 places, 619 transitions, 9221 flow [2024-06-03 20:21:09,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8894, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9221, PETRI_PLACES=459, PETRI_TRANSITIONS=619} [2024-06-03 20:21:09,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 416 predicate places. [2024-06-03 20:21:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 459 places, 619 transitions, 9221 flow [2024-06-03 20:21:09,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:09,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:09,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:09,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:21:09,517 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:09,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1045302410, now seen corresponding path program 10 times [2024-06-03 20:21:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:09,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863872898] [2024-06-03 20:21:09,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:09,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:09,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:10,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:10,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:10,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863872898] [2024-06-03 20:21:10,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863872898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:10,274 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:10,274 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:10,274 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410196802] [2024-06-03 20:21:10,274 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:10,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:10,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:10,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:10,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:10,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:10,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 459 places, 619 transitions, 9221 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:10,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:10,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:10,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:12,276 INFO L124 PetriNetUnfolderBase]: 4339/6933 cut-off events. [2024-06-03 20:21:12,276 INFO L125 PetriNetUnfolderBase]: For 1132185/1132185 co-relation queries the response was YES. [2024-06-03 20:21:12,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64362 conditions, 6933 events. 4339/6933 cut-off events. For 1132185/1132185 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 44777 event pairs, 749 based on Foata normal form. 4/6931 useless extension candidates. Maximal degree in co-relation 64155. Up to 5746 conditions per place. [2024-06-03 20:21:12,403 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 444 selfloop transitions, 210 changer transitions 0/659 dead transitions. [2024-06-03 20:21:12,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 659 transitions, 11419 flow [2024-06-03 20:21:12,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:12,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:12,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-03 20:21:12,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46825396825396826 [2024-06-03 20:21:12,404 INFO L175 Difference]: Start difference. First operand has 459 places, 619 transitions, 9221 flow. Second operand 9 states and 177 transitions. [2024-06-03 20:21:12,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 659 transitions, 11419 flow [2024-06-03 20:21:17,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 659 transitions, 11178 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:17,068 INFO L231 Difference]: Finished difference. Result has 462 places, 625 transitions, 9539 flow [2024-06-03 20:21:17,068 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8980, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=619, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9539, PETRI_PLACES=462, PETRI_TRANSITIONS=625} [2024-06-03 20:21:17,069 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 419 predicate places. [2024-06-03 20:21:17,069 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 625 transitions, 9539 flow [2024-06-03 20:21:17,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:17,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:17,069 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:17,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:21:17,069 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:17,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:17,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1303655302, now seen corresponding path program 11 times [2024-06-03 20:21:17,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:17,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537899908] [2024-06-03 20:21:17,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:17,070 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:17,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:17,905 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:17,905 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:17,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537899908] [2024-06-03 20:21:17,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537899908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:17,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:17,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:17,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810125964] [2024-06-03 20:21:17,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:17,906 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:17,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:17,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:17,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:18,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:18,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 625 transitions, 9539 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:18,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:18,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:18,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:20,289 INFO L124 PetriNetUnfolderBase]: 4327/6931 cut-off events. [2024-06-03 20:21:20,289 INFO L125 PetriNetUnfolderBase]: For 1121665/1121665 co-relation queries the response was YES. [2024-06-03 20:21:20,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64422 conditions, 6931 events. 4327/6931 cut-off events. For 1121665/1121665 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 44887 event pairs, 759 based on Foata normal form. 4/6929 useless extension candidates. Maximal degree in co-relation 64214. Up to 6276 conditions per place. [2024-06-03 20:21:20,410 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 538 selfloop transitions, 112 changer transitions 0/655 dead transitions. [2024-06-03 20:21:20,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 655 transitions, 11091 flow [2024-06-03 20:21:20,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:20,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:20,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:21:20,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-03 20:21:20,411 INFO L175 Difference]: Start difference. First operand has 462 places, 625 transitions, 9539 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:21:20,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 655 transitions, 11091 flow [2024-06-03 20:21:24,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 655 transitions, 10701 flow, removed 51 selfloop flow, removed 5 redundant places. [2024-06-03 20:21:24,894 INFO L231 Difference]: Finished difference. Result has 466 places, 625 transitions, 9380 flow [2024-06-03 20:21:24,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9149, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=513, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9380, PETRI_PLACES=466, PETRI_TRANSITIONS=625} [2024-06-03 20:21:24,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 423 predicate places. [2024-06-03 20:21:24,895 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 625 transitions, 9380 flow [2024-06-03 20:21:24,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:24,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:24,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:24,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:21:24,896 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:24,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:24,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1045747880, now seen corresponding path program 12 times [2024-06-03 20:21:24,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:24,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197580861] [2024-06-03 20:21:24,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:24,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:24,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:25,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:25,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:25,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197580861] [2024-06-03 20:21:25,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197580861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:25,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:25,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:25,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955638778] [2024-06-03 20:21:25,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:25,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:25,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:25,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:25,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:25,864 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:25,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 625 transitions, 9380 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:25,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:25,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:25,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:27,896 INFO L124 PetriNetUnfolderBase]: 4315/6910 cut-off events. [2024-06-03 20:21:27,896 INFO L125 PetriNetUnfolderBase]: For 1103774/1103774 co-relation queries the response was YES. [2024-06-03 20:21:27,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63404 conditions, 6910 events. 4315/6910 cut-off events. For 1103774/1103774 co-relation queries the response was YES. Maximal size of possible extension queue 518. Compared 44776 event pairs, 945 based on Foata normal form. 4/6912 useless extension candidates. Maximal degree in co-relation 63195. Up to 6544 conditions per place. [2024-06-03 20:21:28,020 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 596 selfloop transitions, 46 changer transitions 0/647 dead transitions. [2024-06-03 20:21:28,020 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 647 transitions, 10766 flow [2024-06-03 20:21:28,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:28,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:28,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-03 20:21:28,021 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-03 20:21:28,021 INFO L175 Difference]: Start difference. First operand has 466 places, 625 transitions, 9380 flow. Second operand 9 states and 164 transitions. [2024-06-03 20:21:28,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 647 transitions, 10766 flow [2024-06-03 20:21:32,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 647 transitions, 10500 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 20:21:32,600 INFO L231 Difference]: Finished difference. Result has 467 places, 625 transitions, 9212 flow [2024-06-03 20:21:32,600 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9114, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9212, PETRI_PLACES=467, PETRI_TRANSITIONS=625} [2024-06-03 20:21:32,600 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-03 20:21:32,601 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 625 transitions, 9212 flow [2024-06-03 20:21:32,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:32,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:32,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:32,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:21:32,601 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:32,601 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:32,601 INFO L85 PathProgramCache]: Analyzing trace with hash 1914746044, now seen corresponding path program 13 times [2024-06-03 20:21:32,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:32,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090877554] [2024-06-03 20:21:32,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:32,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:32,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:33,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:33,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:33,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090877554] [2024-06-03 20:21:33,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090877554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:33,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:33,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:33,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464435199] [2024-06-03 20:21:33,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:33,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:33,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:33,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:33,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:33,847 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:33,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 625 transitions, 9212 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:33,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:33,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:33,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:35,839 INFO L124 PetriNetUnfolderBase]: 4345/6948 cut-off events. [2024-06-03 20:21:35,839 INFO L125 PetriNetUnfolderBase]: For 1119219/1119219 co-relation queries the response was YES. [2024-06-03 20:21:35,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63543 conditions, 6948 events. 4345/6948 cut-off events. For 1119219/1119219 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 44976 event pairs, 961 based on Foata normal form. 4/6950 useless extension candidates. Maximal degree in co-relation 63333. Up to 6617 conditions per place. [2024-06-03 20:21:35,973 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 609 selfloop transitions, 37 changer transitions 0/651 dead transitions. [2024-06-03 20:21:35,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 651 transitions, 10710 flow [2024-06-03 20:21:35,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:35,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:35,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:21:35,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:21:35,974 INFO L175 Difference]: Start difference. First operand has 467 places, 625 transitions, 9212 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:21:35,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 651 transitions, 10710 flow [2024-06-03 20:21:40,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 651 transitions, 10489 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-03 20:21:40,603 INFO L231 Difference]: Finished difference. Result has 467 places, 631 transitions, 9185 flow [2024-06-03 20:21:40,604 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8997, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=591, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9185, PETRI_PLACES=467, PETRI_TRANSITIONS=631} [2024-06-03 20:21:40,604 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 424 predicate places. [2024-06-03 20:21:40,604 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 631 transitions, 9185 flow [2024-06-03 20:21:40,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:40,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:40,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:40,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:21:40,605 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:40,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:40,620 INFO L85 PathProgramCache]: Analyzing trace with hash 1144103086, now seen corresponding path program 14 times [2024-06-03 20:21:40,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:40,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650734966] [2024-06-03 20:21:40,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:40,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:40,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:41,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:41,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:41,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650734966] [2024-06-03 20:21:41,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650734966] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:41,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:41,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:41,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052690118] [2024-06-03 20:21:41,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:41,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:41,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:41,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:41,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:41,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:41,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 631 transitions, 9185 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:41,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:41,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:41,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:43,434 INFO L124 PetriNetUnfolderBase]: 4429/7079 cut-off events. [2024-06-03 20:21:43,434 INFO L125 PetriNetUnfolderBase]: For 1203424/1203424 co-relation queries the response was YES. [2024-06-03 20:21:43,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65834 conditions, 7079 events. 4429/7079 cut-off events. For 1203424/1203424 co-relation queries the response was YES. Maximal size of possible extension queue 532. Compared 45930 event pairs, 755 based on Foata normal form. 4/7077 useless extension candidates. Maximal degree in co-relation 65623. Up to 6247 conditions per place. [2024-06-03 20:21:43,569 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 523 selfloop transitions, 144 changer transitions 0/672 dead transitions. [2024-06-03 20:21:43,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 672 transitions, 11522 flow [2024-06-03 20:21:43,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:21:43,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:21:43,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:21:43,571 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-03 20:21:43,571 INFO L175 Difference]: Start difference. First operand has 467 places, 631 transitions, 9185 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:21:43,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 672 transitions, 11522 flow [2024-06-03 20:21:48,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 672 transitions, 11394 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-03 20:21:48,585 INFO L231 Difference]: Finished difference. Result has 471 places, 640 transitions, 9635 flow [2024-06-03 20:21:48,585 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9057, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=631, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9635, PETRI_PLACES=471, PETRI_TRANSITIONS=640} [2024-06-03 20:21:48,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 428 predicate places. [2024-06-03 20:21:48,585 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 640 transitions, 9635 flow [2024-06-03 20:21:48,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:48,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:48,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:48,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:21:48,586 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:48,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:48,586 INFO L85 PathProgramCache]: Analyzing trace with hash 316092754, now seen corresponding path program 15 times [2024-06-03 20:21:48,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:48,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2053808351] [2024-06-03 20:21:48,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:48,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:49,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:49,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:49,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2053808351] [2024-06-03 20:21:49,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2053808351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:49,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:49,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:49,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83894339] [2024-06-03 20:21:49,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:49,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:49,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:49,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:49,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:49,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:49,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 640 transitions, 9635 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:49,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:49,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:49,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:21:51,744 INFO L124 PetriNetUnfolderBase]: 4481/7161 cut-off events. [2024-06-03 20:21:51,745 INFO L125 PetriNetUnfolderBase]: For 1257310/1257310 co-relation queries the response was YES. [2024-06-03 20:21:51,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67827 conditions, 7161 events. 4481/7161 cut-off events. For 1257310/1257310 co-relation queries the response was YES. Maximal size of possible extension queue 542. Compared 46554 event pairs, 761 based on Foata normal form. 4/7159 useless extension candidates. Maximal degree in co-relation 67614. Up to 6287 conditions per place. [2024-06-03 20:21:51,900 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 528 selfloop transitions, 156 changer transitions 0/689 dead transitions. [2024-06-03 20:21:51,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 689 transitions, 12087 flow [2024-06-03 20:21:51,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:21:51,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:21:51,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 222 transitions. [2024-06-03 20:21:51,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 20:21:51,902 INFO L175 Difference]: Start difference. First operand has 471 places, 640 transitions, 9635 flow. Second operand 12 states and 222 transitions. [2024-06-03 20:21:51,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 689 transitions, 12087 flow [2024-06-03 20:21:57,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 689 transitions, 11889 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:21:57,098 INFO L231 Difference]: Finished difference. Result has 479 places, 646 transitions, 9927 flow [2024-06-03 20:21:57,098 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9449, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=640, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=9927, PETRI_PLACES=479, PETRI_TRANSITIONS=646} [2024-06-03 20:21:57,098 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 436 predicate places. [2024-06-03 20:21:57,099 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 646 transitions, 9927 flow [2024-06-03 20:21:57,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:57,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:21:57,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:21:57,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:21:57,099 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:21:57,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:21:57,099 INFO L85 PathProgramCache]: Analyzing trace with hash 1144102931, now seen corresponding path program 10 times [2024-06-03 20:21:57,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:21:57,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1808341880] [2024-06-03 20:21:57,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:21:57,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:21:57,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:21:57,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:21:57,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:21:57,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1808341880] [2024-06-03 20:21:57,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1808341880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:21:57,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:21:57,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:21:57,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [381154413] [2024-06-03 20:21:57,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:21:57,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:21:57,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:21:57,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:21:57,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:21:58,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:21:58,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 646 transitions, 9927 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:21:58,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:21:58,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:21:58,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:00,042 INFO L124 PetriNetUnfolderBase]: 4491/7171 cut-off events. [2024-06-03 20:22:00,042 INFO L125 PetriNetUnfolderBase]: For 1258801/1258801 co-relation queries the response was YES. [2024-06-03 20:22:00,142 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68456 conditions, 7171 events. 4491/7171 cut-off events. For 1258801/1258801 co-relation queries the response was YES. Maximal size of possible extension queue 543. Compared 46589 event pairs, 845 based on Foata normal form. 2/7167 useless extension candidates. Maximal degree in co-relation 68241. Up to 6725 conditions per place. [2024-06-03 20:22:00,173 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 576 selfloop transitions, 91 changer transitions 0/672 dead transitions. [2024-06-03 20:22:00,173 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 672 transitions, 11490 flow [2024-06-03 20:22:00,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:22:00,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:22:00,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:22:00,174 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-03 20:22:00,174 INFO L175 Difference]: Start difference. First operand has 479 places, 646 transitions, 9927 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:22:00,174 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 672 transitions, 11490 flow [2024-06-03 20:22:05,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 672 transitions, 11141 flow, removed 38 selfloop flow, removed 8 redundant places. [2024-06-03 20:22:05,289 INFO L231 Difference]: Finished difference. Result has 480 places, 652 transitions, 9923 flow [2024-06-03 20:22:05,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9578, PETRI_DIFFERENCE_MINUEND_PLACES=471, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9923, PETRI_PLACES=480, PETRI_TRANSITIONS=652} [2024-06-03 20:22:05,293 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 437 predicate places. [2024-06-03 20:22:05,294 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 652 transitions, 9923 flow [2024-06-03 20:22:05,294 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:05,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:05,294 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:05,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:22:05,294 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:05,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:05,295 INFO L85 PathProgramCache]: Analyzing trace with hash 1144399601, now seen corresponding path program 11 times [2024-06-03 20:22:05,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:05,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069608134] [2024-06-03 20:22:05,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:05,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:05,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:06,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:06,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:06,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069608134] [2024-06-03 20:22:06,146 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069608134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:06,146 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:06,146 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:06,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340709475] [2024-06-03 20:22:06,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:06,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:06,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:06,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:06,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:06,214 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:22:06,215 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 652 transitions, 9923 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:06,215 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:06,215 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:22:06,215 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:08,150 INFO L124 PetriNetUnfolderBase]: 4504/7189 cut-off events. [2024-06-03 20:22:08,151 INFO L125 PetriNetUnfolderBase]: For 1274545/1274545 co-relation queries the response was YES. [2024-06-03 20:22:08,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68388 conditions, 7189 events. 4504/7189 cut-off events. For 1274545/1274545 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 46685 event pairs, 847 based on Foata normal form. 1/7184 useless extension candidates. Maximal degree in co-relation 68172. Up to 6788 conditions per place. [2024-06-03 20:22:08,485 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 600 selfloop transitions, 75 changer transitions 0/680 dead transitions. [2024-06-03 20:22:08,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 488 places, 680 transitions, 11803 flow [2024-06-03 20:22:08,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:22:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:22:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-03 20:22:08,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-03 20:22:08,487 INFO L175 Difference]: Start difference. First operand has 480 places, 652 transitions, 9923 flow. Second operand 9 states and 158 transitions. [2024-06-03 20:22:08,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 488 places, 680 transitions, 11803 flow [2024-06-03 20:22:13,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 680 transitions, 11531 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-03 20:22:13,892 INFO L231 Difference]: Finished difference. Result has 484 places, 664 transitions, 10090 flow [2024-06-03 20:22:13,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9651, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10090, PETRI_PLACES=484, PETRI_TRANSITIONS=664} [2024-06-03 20:22:13,893 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 441 predicate places. [2024-06-03 20:22:13,893 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 664 transitions, 10090 flow [2024-06-03 20:22:13,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:13,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:13,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:13,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:22:13,894 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:13,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:13,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1149644026, now seen corresponding path program 16 times [2024-06-03 20:22:13,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:13,895 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108989397] [2024-06-03 20:22:13,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:13,895 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:13,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:14,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:14,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:14,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1108989397] [2024-06-03 20:22:14,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1108989397] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:14,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:14,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:14,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [640842703] [2024-06-03 20:22:14,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:14,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:14,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:14,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:14,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:14,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:22:14,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 664 transitions, 10090 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:14,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:14,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:22:14,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:16,907 INFO L124 PetriNetUnfolderBase]: 4492/7182 cut-off events. [2024-06-03 20:22:16,907 INFO L125 PetriNetUnfolderBase]: For 1282782/1282782 co-relation queries the response was YES. [2024-06-03 20:22:16,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67839 conditions, 7182 events. 4492/7182 cut-off events. For 1282782/1282782 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 46738 event pairs, 983 based on Foata normal form. 4/7184 useless extension candidates. Maximal degree in co-relation 67620. Up to 6761 conditions per place. [2024-06-03 20:22:17,021 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 636 selfloop transitions, 47 changer transitions 0/688 dead transitions. [2024-06-03 20:22:17,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 494 places, 688 transitions, 11850 flow [2024-06-03 20:22:17,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:22:17,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:22:17,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-03 20:22:17,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-03 20:22:17,022 INFO L175 Difference]: Start difference. First operand has 484 places, 664 transitions, 10090 flow. Second operand 11 states and 191 transitions. [2024-06-03 20:22:17,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 494 places, 688 transitions, 11850 flow [2024-06-03 20:22:21,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 490 places, 688 transitions, 11675 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-03 20:22:21,716 INFO L231 Difference]: Finished difference. Result has 491 places, 664 transitions, 10015 flow [2024-06-03 20:22:21,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9915, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10015, PETRI_PLACES=491, PETRI_TRANSITIONS=664} [2024-06-03 20:22:21,716 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 448 predicate places. [2024-06-03 20:22:21,716 INFO L495 AbstractCegarLoop]: Abstraction has has 491 places, 664 transitions, 10015 flow [2024-06-03 20:22:21,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:21,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:21,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:21,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:22:21,717 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:21,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:21,717 INFO L85 PathProgramCache]: Analyzing trace with hash 330169234, now seen corresponding path program 17 times [2024-06-03 20:22:21,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:21,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994709841] [2024-06-03 20:22:21,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:21,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:21,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:22,549 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:22,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:22,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994709841] [2024-06-03 20:22:22,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994709841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:22,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:22,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:22,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863602680] [2024-06-03 20:22:22,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:22,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:22,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:22,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:22,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:22,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:22:22,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 491 places, 664 transitions, 10015 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:22,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:22,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:22:22,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:24,911 INFO L124 PetriNetUnfolderBase]: 4480/7166 cut-off events. [2024-06-03 20:22:24,912 INFO L125 PetriNetUnfolderBase]: For 1265650/1265650 co-relation queries the response was YES. [2024-06-03 20:22:25,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67234 conditions, 7166 events. 4480/7166 cut-off events. For 1265650/1265650 co-relation queries the response was YES. Maximal size of possible extension queue 545. Compared 46699 event pairs, 975 based on Foata normal form. 4/7168 useless extension candidates. Maximal degree in co-relation 67014. Up to 6753 conditions per place. [2024-06-03 20:22:25,043 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 640 selfloop transitions, 47 changer transitions 0/692 dead transitions. [2024-06-03 20:22:25,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 692 transitions, 11567 flow [2024-06-03 20:22:25,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:22:25,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:22:25,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 221 transitions. [2024-06-03 20:22:25,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 20:22:25,045 INFO L175 Difference]: Start difference. First operand has 491 places, 664 transitions, 10015 flow. Second operand 13 states and 221 transitions. [2024-06-03 20:22:25,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 692 transitions, 11567 flow [2024-06-03 20:22:30,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 495 places, 692 transitions, 11356 flow, removed 51 selfloop flow, removed 8 redundant places. [2024-06-03 20:22:30,898 INFO L231 Difference]: Finished difference. Result has 496 places, 664 transitions, 9904 flow [2024-06-03 20:22:30,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9804, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=617, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=9904, PETRI_PLACES=496, PETRI_TRANSITIONS=664} [2024-06-03 20:22:30,899 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 453 predicate places. [2024-06-03 20:22:30,899 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 664 transitions, 9904 flow [2024-06-03 20:22:30,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:30,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:30,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:30,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:22:30,900 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:30,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:30,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1135828721, now seen corresponding path program 12 times [2024-06-03 20:22:30,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:30,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103042791] [2024-06-03 20:22:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:30,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:30,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103042791] [2024-06-03 20:22:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103042791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:31,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:31,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:31,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856388409] [2024-06-03 20:22:31,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:31,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:31,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:32,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:22:32,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 496 places, 664 transitions, 9904 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:32,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:32,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:22:32,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:33,931 INFO L124 PetriNetUnfolderBase]: 4482/7176 cut-off events. [2024-06-03 20:22:33,931 INFO L125 PetriNetUnfolderBase]: For 1256207/1256207 co-relation queries the response was YES. [2024-06-03 20:22:34,026 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67021 conditions, 7176 events. 4482/7176 cut-off events. For 1256207/1256207 co-relation queries the response was YES. Maximal size of possible extension queue 546. Compared 46748 event pairs, 855 based on Foata normal form. 2/7172 useless extension candidates. Maximal degree in co-relation 66800. Up to 6714 conditions per place. [2024-06-03 20:22:34,054 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 589 selfloop transitions, 92 changer transitions 0/686 dead transitions. [2024-06-03 20:22:34,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 686 transitions, 11421 flow [2024-06-03 20:22:34,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:22:34,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:22:34,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 191 transitions. [2024-06-03 20:22:34,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4134199134199134 [2024-06-03 20:22:34,055 INFO L175 Difference]: Start difference. First operand has 496 places, 664 transitions, 9904 flow. Second operand 11 states and 191 transitions. [2024-06-03 20:22:34,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 686 transitions, 11421 flow [2024-06-03 20:22:39,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 686 transitions, 11243 flow, removed 27 selfloop flow, removed 13 redundant places. [2024-06-03 20:22:39,676 INFO L231 Difference]: Finished difference. Result has 494 places, 667 transitions, 10017 flow [2024-06-03 20:22:39,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9726, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10017, PETRI_PLACES=494, PETRI_TRANSITIONS=667} [2024-06-03 20:22:39,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-03 20:22:39,676 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 667 transitions, 10017 flow [2024-06-03 20:22:39,677 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:39,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:39,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:39,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:22:39,677 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:39,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:39,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1135828876, now seen corresponding path program 18 times [2024-06-03 20:22:39,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:39,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71574344] [2024-06-03 20:22:39,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:39,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:39,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:40,440 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:40,440 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71574344] [2024-06-03 20:22:40,440 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71574344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:40,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:40,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:40,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735686792] [2024-06-03 20:22:40,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:40,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:40,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:40,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:40,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:40,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:22:40,535 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 667 transitions, 10017 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:40,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:40,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:22:40,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:42,449 INFO L124 PetriNetUnfolderBase]: 4470/7146 cut-off events. [2024-06-03 20:22:42,450 INFO L125 PetriNetUnfolderBase]: For 1256439/1256439 co-relation queries the response was YES. [2024-06-03 20:22:42,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66444 conditions, 7146 events. 4470/7146 cut-off events. For 1256439/1256439 co-relation queries the response was YES. Maximal size of possible extension queue 544. Compared 46456 event pairs, 753 based on Foata normal form. 4/7144 useless extension candidates. Maximal degree in co-relation 66222. Up to 6298 conditions per place. [2024-06-03 20:22:42,571 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 543 selfloop transitions, 152 changer transitions 0/700 dead transitions. [2024-06-03 20:22:42,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 504 places, 700 transitions, 11723 flow [2024-06-03 20:22:42,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:22:42,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:22:42,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 205 transitions. [2024-06-03 20:22:42,573 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44372294372294374 [2024-06-03 20:22:42,573 INFO L175 Difference]: Start difference. First operand has 494 places, 667 transitions, 10017 flow. Second operand 11 states and 205 transitions. [2024-06-03 20:22:42,573 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 504 places, 700 transitions, 11723 flow [2024-06-03 20:22:47,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 496 places, 700 transitions, 11434 flow, removed 60 selfloop flow, removed 8 redundant places. [2024-06-03 20:22:47,701 INFO L231 Difference]: Finished difference. Result has 497 places, 667 transitions, 10039 flow [2024-06-03 20:22:47,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9728, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=152, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10039, PETRI_PLACES=497, PETRI_TRANSITIONS=667} [2024-06-03 20:22:47,701 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 454 predicate places. [2024-06-03 20:22:47,702 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 667 transitions, 10039 flow [2024-06-03 20:22:47,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:47,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:47,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:47,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:22:47,702 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:47,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:47,703 INFO L85 PathProgramCache]: Analyzing trace with hash 952043768, now seen corresponding path program 19 times [2024-06-03 20:22:47,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:47,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456264412] [2024-06-03 20:22:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:47,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:47,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:48,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:48,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:48,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456264412] [2024-06-03 20:22:48,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456264412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:48,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:48,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:48,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138444805] [2024-06-03 20:22:48,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:48,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:48,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:48,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:48,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:48,571 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:22:48,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 667 transitions, 10039 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:48,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:48,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:22:48,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:50,514 INFO L124 PetriNetUnfolderBase]: 4490/7187 cut-off events. [2024-06-03 20:22:50,514 INFO L125 PetriNetUnfolderBase]: For 1274734/1274734 co-relation queries the response was YES. [2024-06-03 20:22:50,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67118 conditions, 7187 events. 4490/7187 cut-off events. For 1274734/1274734 co-relation queries the response was YES. Maximal size of possible extension queue 547. Compared 46815 event pairs, 825 based on Foata normal form. 4/7189 useless extension candidates. Maximal degree in co-relation 66895. Up to 6762 conditions per place. [2024-06-03 20:22:50,628 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 641 selfloop transitions, 51 changer transitions 0/697 dead transitions. [2024-06-03 20:22:50,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 697 transitions, 11669 flow [2024-06-03 20:22:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:22:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:22:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-03 20:22:50,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48639455782312924 [2024-06-03 20:22:50,629 INFO L175 Difference]: Start difference. First operand has 497 places, 667 transitions, 10039 flow. Second operand 7 states and 143 transitions. [2024-06-03 20:22:50,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 697 transitions, 11669 flow [2024-06-03 20:22:55,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 697 transitions, 11310 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:22:55,404 INFO L231 Difference]: Finished difference. Result has 493 places, 670 transitions, 9899 flow [2024-06-03 20:22:55,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9680, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=616, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9899, PETRI_PLACES=493, PETRI_TRANSITIONS=670} [2024-06-03 20:22:55,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 450 predicate places. [2024-06-03 20:22:55,405 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 670 transitions, 9899 flow [2024-06-03 20:22:55,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:55,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:22:55,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:22:55,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:22:55,405 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:22:55,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:22:55,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1616799066, now seen corresponding path program 20 times [2024-06-03 20:22:55,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:22:55,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459057355] [2024-06-03 20:22:55,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:22:55,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:22:55,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:22:56,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:22:56,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:22:56,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459057355] [2024-06-03 20:22:56,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459057355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:22:56,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:22:56,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:22:56,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273973123] [2024-06-03 20:22:56,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:22:56,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:22:56,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:22:56,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:22:56,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:22:56,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:22:56,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 670 transitions, 9899 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:22:56,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:22:56,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:22:56,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:22:58,344 INFO L124 PetriNetUnfolderBase]: 4520/7223 cut-off events. [2024-06-03 20:22:58,344 INFO L125 PetriNetUnfolderBase]: For 1292427/1292427 co-relation queries the response was YES. [2024-06-03 20:22:58,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67295 conditions, 7223 events. 4520/7223 cut-off events. For 1292427/1292427 co-relation queries the response was YES. Maximal size of possible extension queue 552. Compared 47064 event pairs, 1023 based on Foata normal form. 4/7225 useless extension candidates. Maximal degree in co-relation 67071. Up to 6858 conditions per place. [2024-06-03 20:22:58,474 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 657 selfloop transitions, 35 changer transitions 0/697 dead transitions. [2024-06-03 20:22:58,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 697 transitions, 11509 flow [2024-06-03 20:22:58,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:22:58,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:22:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:22:58,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:22:58,475 INFO L175 Difference]: Start difference. First operand has 493 places, 670 transitions, 9899 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:22:58,475 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 697 transitions, 11509 flow [2024-06-03 20:23:03,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 493 places, 697 transitions, 11333 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-03 20:23:03,964 INFO L231 Difference]: Finished difference. Result has 494 places, 676 transitions, 9931 flow [2024-06-03 20:23:03,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9723, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9931, PETRI_PLACES=494, PETRI_TRANSITIONS=676} [2024-06-03 20:23:03,964 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 451 predicate places. [2024-06-03 20:23:03,965 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 676 transitions, 9931 flow [2024-06-03 20:23:03,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:03,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:03,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:03,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:23:03,965 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:03,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:03,965 INFO L85 PathProgramCache]: Analyzing trace with hash 310339441, now seen corresponding path program 13 times [2024-06-03 20:23:03,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:03,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055647401] [2024-06-03 20:23:03,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:03,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:03,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:04,946 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:04,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:04,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055647401] [2024-06-03 20:23:04,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055647401] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:04,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:04,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:04,947 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081985974] [2024-06-03 20:23:04,947 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:04,947 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:04,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:04,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:04,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:05,037 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:23:05,037 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 676 transitions, 9931 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:05,037 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:05,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:23:05,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:06,976 INFO L124 PetriNetUnfolderBase]: 4522/7221 cut-off events. [2024-06-03 20:23:06,977 INFO L125 PetriNetUnfolderBase]: For 1282914/1282914 co-relation queries the response was YES. [2024-06-03 20:23:07,073 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67168 conditions, 7221 events. 4522/7221 cut-off events. For 1282914/1282914 co-relation queries the response was YES. Maximal size of possible extension queue 548. Compared 47015 event pairs, 839 based on Foata normal form. 2/7217 useless extension candidates. Maximal degree in co-relation 66945. Up to 6598 conditions per place. [2024-06-03 20:23:07,101 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 556 selfloop transitions, 149 changer transitions 0/710 dead transitions. [2024-06-03 20:23:07,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 710 transitions, 11826 flow [2024-06-03 20:23:07,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:23:07,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:23:07,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-03 20:23:07,102 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4708994708994709 [2024-06-03 20:23:07,103 INFO L175 Difference]: Start difference. First operand has 494 places, 676 transitions, 9931 flow. Second operand 9 states and 178 transitions. [2024-06-03 20:23:07,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 710 transitions, 11826 flow [2024-06-03 20:23:12,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 710 transitions, 11608 flow, removed 77 selfloop flow, removed 5 redundant places. [2024-06-03 20:23:12,526 INFO L231 Difference]: Finished difference. Result has 499 places, 679 transitions, 10193 flow [2024-06-03 20:23:12,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9713, PETRI_DIFFERENCE_MINUEND_PLACES=489, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10193, PETRI_PLACES=499, PETRI_TRANSITIONS=679} [2024-06-03 20:23:12,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 456 predicate places. [2024-06-03 20:23:12,527 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 679 transitions, 10193 flow [2024-06-03 20:23:12,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:12,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:12,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:12,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:23:12,527 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:12,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:12,528 INFO L85 PathProgramCache]: Analyzing trace with hash -1735281252, now seen corresponding path program 21 times [2024-06-03 20:23:12,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:12,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [220509167] [2024-06-03 20:23:12,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:12,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:12,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:13,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:13,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:13,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [220509167] [2024-06-03 20:23:13,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [220509167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:13,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:13,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:13,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072579542] [2024-06-03 20:23:13,318 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:13,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:13,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:13,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:13,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:13,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:23:13,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 679 transitions, 10193 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:13,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:13,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:23:13,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:15,368 INFO L124 PetriNetUnfolderBase]: 4584/7314 cut-off events. [2024-06-03 20:23:15,368 INFO L125 PetriNetUnfolderBase]: For 1358125/1358125 co-relation queries the response was YES. [2024-06-03 20:23:15,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69059 conditions, 7314 events. 4584/7314 cut-off events. For 1358125/1358125 co-relation queries the response was YES. Maximal size of possible extension queue 558. Compared 47689 event pairs, 1015 based on Foata normal form. 4/7316 useless extension candidates. Maximal degree in co-relation 68834. Up to 6883 conditions per place. [2024-06-03 20:23:15,493 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 659 selfloop transitions, 44 changer transitions 0/708 dead transitions. [2024-06-03 20:23:15,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 506 places, 708 transitions, 12210 flow [2024-06-03 20:23:15,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:15,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:15,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-03 20:23:15,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-03 20:23:15,495 INFO L175 Difference]: Start difference. First operand has 499 places, 679 transitions, 10193 flow. Second operand 8 states and 150 transitions. [2024-06-03 20:23:15,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 506 places, 708 transitions, 12210 flow [2024-06-03 20:23:22,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 708 transitions, 11871 flow, removed 26 selfloop flow, removed 8 redundant places. [2024-06-03 20:23:22,037 INFO L231 Difference]: Finished difference. Result has 500 places, 688 transitions, 10187 flow [2024-06-03 20:23:22,041 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9854, PETRI_DIFFERENCE_MINUEND_PLACES=491, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=638, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10187, PETRI_PLACES=500, PETRI_TRANSITIONS=688} [2024-06-03 20:23:22,041 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 457 predicate places. [2024-06-03 20:23:22,042 INFO L495 AbstractCegarLoop]: Abstraction has has 500 places, 688 transitions, 10187 flow [2024-06-03 20:23:22,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:22,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:22,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:22,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:23:22,042 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:22,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:22,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1616812086, now seen corresponding path program 22 times [2024-06-03 20:23:22,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:22,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136826426] [2024-06-03 20:23:22,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:22,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:22,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:22,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:22,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:22,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136826426] [2024-06-03 20:23:22,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136826426] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:22,821 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:22,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:22,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [5942785] [2024-06-03 20:23:22,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:22,821 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:22,821 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:22,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:22,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:22,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:23:22,903 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 500 places, 688 transitions, 10187 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:22,903 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:22,903 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:23:22,903 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:24,947 INFO L124 PetriNetUnfolderBase]: 4604/7349 cut-off events. [2024-06-03 20:23:24,954 INFO L125 PetriNetUnfolderBase]: For 1376043/1376043 co-relation queries the response was YES. [2024-06-03 20:23:25,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69329 conditions, 7349 events. 4604/7349 cut-off events. For 1376043/1376043 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 47987 event pairs, 799 based on Foata normal form. 4/7347 useless extension candidates. Maximal degree in co-relation 69103. Up to 6411 conditions per place. [2024-06-03 20:23:25,094 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 563 selfloop transitions, 156 changer transitions 0/724 dead transitions. [2024-06-03 20:23:25,094 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 724 transitions, 12510 flow [2024-06-03 20:23:25,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:25,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:25,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 20:23:25,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-03 20:23:25,108 INFO L175 Difference]: Start difference. First operand has 500 places, 688 transitions, 10187 flow. Second operand 8 states and 163 transitions. [2024-06-03 20:23:25,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 724 transitions, 12510 flow [2024-06-03 20:23:31,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 503 places, 724 transitions, 12372 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:31,376 INFO L231 Difference]: Finished difference. Result has 504 places, 691 transitions, 10461 flow [2024-06-03 20:23:31,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10049, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10461, PETRI_PLACES=504, PETRI_TRANSITIONS=691} [2024-06-03 20:23:31,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 461 predicate places. [2024-06-03 20:23:31,377 INFO L495 AbstractCegarLoop]: Abstraction has has 504 places, 691 transitions, 10461 flow [2024-06-03 20:23:31,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:31,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:31,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:31,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:23:31,396 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:31,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:31,397 INFO L85 PathProgramCache]: Analyzing trace with hash 1158697208, now seen corresponding path program 23 times [2024-06-03 20:23:31,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:31,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730122258] [2024-06-03 20:23:31,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:31,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:32,211 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:32,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:32,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730122258] [2024-06-03 20:23:32,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730122258] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:32,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:32,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:32,212 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1310006891] [2024-06-03 20:23:32,212 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:32,212 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:32,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:32,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:32,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:32,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:23:32,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 504 places, 691 transitions, 10461 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:32,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:32,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:23:32,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:34,220 INFO L124 PetriNetUnfolderBase]: 4624/7390 cut-off events. [2024-06-03 20:23:34,220 INFO L125 PetriNetUnfolderBase]: For 1397891/1397891 co-relation queries the response was YES. [2024-06-03 20:23:34,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70082 conditions, 7390 events. 4624/7390 cut-off events. For 1397891/1397891 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 48440 event pairs, 841 based on Foata normal form. 4/7392 useless extension candidates. Maximal degree in co-relation 69855. Up to 6768 conditions per place. [2024-06-03 20:23:34,350 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 622 selfloop transitions, 103 changer transitions 0/730 dead transitions. [2024-06-03 20:23:34,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 730 transitions, 12512 flow [2024-06-03 20:23:34,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:23:34,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:23:34,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-03 20:23:34,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:23:34,352 INFO L175 Difference]: Start difference. First operand has 504 places, 691 transitions, 10461 flow. Second operand 8 states and 168 transitions. [2024-06-03 20:23:34,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 730 transitions, 12512 flow [2024-06-03 20:23:40,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 730 transitions, 11671 flow, removed 60 selfloop flow, removed 10 redundant places. [2024-06-03 20:23:40,450 INFO L231 Difference]: Finished difference. Result has 502 places, 694 transitions, 9950 flow [2024-06-03 20:23:40,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9638, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=588, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9950, PETRI_PLACES=502, PETRI_TRANSITIONS=694} [2024-06-03 20:23:40,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-03 20:23:40,451 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 694 transitions, 9950 flow [2024-06-03 20:23:40,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:40,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:40,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:40,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:23:40,452 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:40,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:40,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1939896851, now seen corresponding path program 2 times [2024-06-03 20:23:40,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:40,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654708621] [2024-06-03 20:23:40,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:40,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:40,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:41,299 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:41,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:41,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654708621] [2024-06-03 20:23:41,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654708621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:41,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:41,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:41,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883751886] [2024-06-03 20:23:41,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:41,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:41,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:41,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:41,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:41,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:23:41,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 694 transitions, 9950 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:41,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:41,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:23:41,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:43,298 INFO L124 PetriNetUnfolderBase]: 4634/7402 cut-off events. [2024-06-03 20:23:43,298 INFO L125 PetriNetUnfolderBase]: For 1392667/1392667 co-relation queries the response was YES. [2024-06-03 20:23:43,396 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68589 conditions, 7402 events. 4634/7402 cut-off events. For 1392667/1392667 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 48395 event pairs, 866 based on Foata normal form. 2/7402 useless extension candidates. Maximal degree in co-relation 68365. Up to 6985 conditions per place. [2024-06-03 20:23:43,425 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 661 selfloop transitions, 51 changer transitions 0/717 dead transitions. [2024-06-03 20:23:43,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 507 places, 717 transitions, 11566 flow [2024-06-03 20:23:43,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:23:43,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:23:43,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-03 20:23:43,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-03 20:23:43,426 INFO L175 Difference]: Start difference. First operand has 502 places, 694 transitions, 9950 flow. Second operand 6 states and 124 transitions. [2024-06-03 20:23:43,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 507 places, 717 transitions, 11566 flow [2024-06-03 20:23:49,425 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 500 places, 717 transitions, 11328 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:23:49,432 INFO L231 Difference]: Finished difference. Result has 502 places, 698 transitions, 9976 flow [2024-06-03 20:23:49,433 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9712, PETRI_DIFFERENCE_MINUEND_PLACES=495, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=9976, PETRI_PLACES=502, PETRI_TRANSITIONS=698} [2024-06-03 20:23:49,433 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 459 predicate places. [2024-06-03 20:23:49,433 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 698 transitions, 9976 flow [2024-06-03 20:23:49,433 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:49,433 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:49,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:49,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:23:49,433 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:49,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:49,434 INFO L85 PathProgramCache]: Analyzing trace with hash 315850776, now seen corresponding path program 24 times [2024-06-03 20:23:49,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:49,434 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818850148] [2024-06-03 20:23:49,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:49,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:49,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:50,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:50,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:50,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818850148] [2024-06-03 20:23:50,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818850148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:50,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:50,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:50,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004793923] [2024-06-03 20:23:50,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:50,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:50,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:50,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:50,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:50,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:23:50,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 698 transitions, 9976 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:50,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:50,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:23:50,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:23:52,612 INFO L124 PetriNetUnfolderBase]: 4622/7378 cut-off events. [2024-06-03 20:23:52,612 INFO L125 PetriNetUnfolderBase]: For 1375840/1375840 co-relation queries the response was YES. [2024-06-03 20:23:52,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67958 conditions, 7378 events. 4622/7378 cut-off events. For 1375840/1375840 co-relation queries the response was YES. Maximal size of possible extension queue 569. Compared 48241 event pairs, 1019 based on Foata normal form. 4/7380 useless extension candidates. Maximal degree in co-relation 67734. Up to 6945 conditions per place. [2024-06-03 20:23:52,725 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 672 selfloop transitions, 45 changer transitions 0/722 dead transitions. [2024-06-03 20:23:52,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 722 transitions, 11576 flow [2024-06-03 20:23:52,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:23:52,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:23:52,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 180 transitions. [2024-06-03 20:23:52,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:23:52,727 INFO L175 Difference]: Start difference. First operand has 502 places, 698 transitions, 9976 flow. Second operand 10 states and 180 transitions. [2024-06-03 20:23:52,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 722 transitions, 11576 flow [2024-06-03 20:23:58,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 722 transitions, 11392 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 20:23:58,779 INFO L231 Difference]: Finished difference. Result has 508 places, 698 transitions, 9888 flow [2024-06-03 20:23:58,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9792, PETRI_DIFFERENCE_MINUEND_PLACES=498, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=653, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9888, PETRI_PLACES=508, PETRI_TRANSITIONS=698} [2024-06-03 20:23:58,780 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 465 predicate places. [2024-06-03 20:23:58,780 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 698 transitions, 9888 flow [2024-06-03 20:23:58,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:58,780 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:23:58,780 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:23:58,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:23:58,780 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:23:58,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:23:58,781 INFO L85 PathProgramCache]: Analyzing trace with hash -128214299, now seen corresponding path program 14 times [2024-06-03 20:23:58,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:23:58,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [133636417] [2024-06-03 20:23:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:23:58,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:23:58,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:23:59,642 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:23:59,643 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:23:59,643 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [133636417] [2024-06-03 20:23:59,643 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [133636417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:23:59,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:23:59,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:23:59,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210404648] [2024-06-03 20:23:59,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:23:59,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:23:59,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:23:59,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:23:59,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:23:59,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:23:59,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 698 transitions, 9888 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:23:59,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:23:59,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:23:59,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:01,695 INFO L124 PetriNetUnfolderBase]: 4616/7383 cut-off events. [2024-06-03 20:24:01,695 INFO L125 PetriNetUnfolderBase]: For 1335490/1335490 co-relation queries the response was YES. [2024-06-03 20:24:01,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67363 conditions, 7383 events. 4616/7383 cut-off events. For 1335490/1335490 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 48381 event pairs, 863 based on Foata normal form. 2/7379 useless extension candidates. Maximal degree in co-relation 67139. Up to 6820 conditions per place. [2024-06-03 20:24:01,828 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 618 selfloop transitions, 101 changer transitions 0/724 dead transitions. [2024-06-03 20:24:01,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 515 places, 724 transitions, 11428 flow [2024-06-03 20:24:01,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:01,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:01,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 20:24:01,829 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-03 20:24:01,830 INFO L175 Difference]: Start difference. First operand has 508 places, 698 transitions, 9888 flow. Second operand 8 states and 158 transitions. [2024-06-03 20:24:01,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 515 places, 724 transitions, 11428 flow [2024-06-03 20:24:08,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 724 transitions, 11320 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-03 20:24:08,311 INFO L231 Difference]: Finished difference. Result has 510 places, 698 transitions, 10004 flow [2024-06-03 20:24:08,311 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=597, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10004, PETRI_PLACES=510, PETRI_TRANSITIONS=698} [2024-06-03 20:24:08,312 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-03 20:24:08,312 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 698 transitions, 10004 flow [2024-06-03 20:24:08,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:08,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:08,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:08,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:24:08,312 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:08,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:08,313 INFO L85 PathProgramCache]: Analyzing trace with hash 509790186, now seen corresponding path program 25 times [2024-06-03 20:24:08,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:08,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514535060] [2024-06-03 20:24:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:08,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:09,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:09,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:09,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514535060] [2024-06-03 20:24:09,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514535060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:09,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:09,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:09,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830860174] [2024-06-03 20:24:09,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:09,003 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:09,003 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:09,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:09,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:09,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:24:09,057 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 698 transitions, 10004 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:09,057 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:09,057 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:24:09,057 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:11,283 INFO L124 PetriNetUnfolderBase]: 4604/7366 cut-off events. [2024-06-03 20:24:11,283 INFO L125 PetriNetUnfolderBase]: For 1333383/1333383 co-relation queries the response was YES. [2024-06-03 20:24:11,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66902 conditions, 7366 events. 4604/7366 cut-off events. For 1333383/1333383 co-relation queries the response was YES. Maximal size of possible extension queue 568. Compared 48325 event pairs, 837 based on Foata normal form. 4/7368 useless extension candidates. Maximal degree in co-relation 66677. Up to 6750 conditions per place. [2024-06-03 20:24:11,403 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 620 selfloop transitions, 108 changer transitions 0/733 dead transitions. [2024-06-03 20:24:11,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 517 places, 733 transitions, 11686 flow [2024-06-03 20:24:11,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:11,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:11,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-03 20:24:11,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49404761904761907 [2024-06-03 20:24:11,405 INFO L175 Difference]: Start difference. First operand has 510 places, 698 transitions, 10004 flow. Second operand 8 states and 166 transitions. [2024-06-03 20:24:11,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 517 places, 733 transitions, 11686 flow [2024-06-03 20:24:16,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 509 places, 733 transitions, 11366 flow, removed 65 selfloop flow, removed 8 redundant places. [2024-06-03 20:24:16,612 INFO L231 Difference]: Finished difference. Result has 510 places, 698 transitions, 9918 flow [2024-06-03 20:24:16,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9684, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9918, PETRI_PLACES=510, PETRI_TRANSITIONS=698} [2024-06-03 20:24:16,613 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 467 predicate places. [2024-06-03 20:24:16,613 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 698 transitions, 9918 flow [2024-06-03 20:24:16,613 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:16,613 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:16,613 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:16,613 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:24:16,614 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:16,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:16,614 INFO L85 PathProgramCache]: Analyzing trace with hash 1415673165, now seen corresponding path program 3 times [2024-06-03 20:24:16,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:16,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105526933] [2024-06-03 20:24:16,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:16,614 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:16,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:17,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:17,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:17,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105526933] [2024-06-03 20:24:17,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105526933] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:17,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:17,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:17,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051170506] [2024-06-03 20:24:17,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:17,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:17,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:17,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:17,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:17,563 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:24:17,564 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 698 transitions, 9918 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:17,564 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:17,564 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:24:17,564 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:19,447 INFO L124 PetriNetUnfolderBase]: 4614/7380 cut-off events. [2024-06-03 20:24:19,447 INFO L125 PetriNetUnfolderBase]: For 1298648/1298648 co-relation queries the response was YES. [2024-06-03 20:24:19,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66864 conditions, 7380 events. 4614/7380 cut-off events. For 1298648/1298648 co-relation queries the response was YES. Maximal size of possible extension queue 567. Compared 48359 event pairs, 836 based on Foata normal form. 2/7380 useless extension candidates. Maximal degree in co-relation 66640. Up to 6875 conditions per place. [2024-06-03 20:24:19,575 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 632 selfloop transitions, 89 changer transitions 0/726 dead transitions. [2024-06-03 20:24:19,575 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 726 transitions, 11598 flow [2024-06-03 20:24:19,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:24:19,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:24:19,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 146 transitions. [2024-06-03 20:24:19,576 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4965986394557823 [2024-06-03 20:24:19,576 INFO L175 Difference]: Start difference. First operand has 510 places, 698 transitions, 9918 flow. Second operand 7 states and 146 transitions. [2024-06-03 20:24:19,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 726 transitions, 11598 flow [2024-06-03 20:24:25,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 510 places, 726 transitions, 11453 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-03 20:24:25,526 INFO L231 Difference]: Finished difference. Result has 511 places, 701 transitions, 10088 flow [2024-06-03 20:24:25,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9773, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=609, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10088, PETRI_PLACES=511, PETRI_TRANSITIONS=701} [2024-06-03 20:24:25,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 468 predicate places. [2024-06-03 20:24:25,526 INFO L495 AbstractCegarLoop]: Abstraction has has 511 places, 701 transitions, 10088 flow [2024-06-03 20:24:25,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:25,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:25,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:25,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:24:25,527 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:25,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:25,527 INFO L85 PathProgramCache]: Analyzing trace with hash 1195108144, now seen corresponding path program 26 times [2024-06-03 20:24:25,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:25,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153665273] [2024-06-03 20:24:25,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:25,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:25,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:26,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:26,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:26,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153665273] [2024-06-03 20:24:26,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153665273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:26,297 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:26,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:26,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254679659] [2024-06-03 20:24:26,297 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:26,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:26,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:26,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:26,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:26,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:24:26,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 511 places, 701 transitions, 10088 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:26,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:26,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:24:26,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:28,271 INFO L124 PetriNetUnfolderBase]: 4634/7409 cut-off events. [2024-06-03 20:24:28,272 INFO L125 PetriNetUnfolderBase]: For 1323766/1323766 co-relation queries the response was YES. [2024-06-03 20:24:28,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67579 conditions, 7409 events. 4634/7409 cut-off events. For 1323766/1323766 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 48558 event pairs, 843 based on Foata normal form. 4/7407 useless extension candidates. Maximal degree in co-relation 67355. Up to 6447 conditions per place. [2024-06-03 20:24:28,399 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 580 selfloop transitions, 149 changer transitions 0/734 dead transitions. [2024-06-03 20:24:28,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 734 transitions, 12419 flow [2024-06-03 20:24:28,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:28,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:28,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-03 20:24:28,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-03 20:24:28,400 INFO L175 Difference]: Start difference. First operand has 511 places, 701 transitions, 10088 flow. Second operand 8 states and 160 transitions. [2024-06-03 20:24:28,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 734 transitions, 12419 flow [2024-06-03 20:24:33,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 513 places, 734 transitions, 12215 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:24:33,902 INFO L231 Difference]: Finished difference. Result has 514 places, 704 transitions, 10275 flow [2024-06-03 20:24:33,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9888, PETRI_DIFFERENCE_MINUEND_PLACES=506, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=555, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10275, PETRI_PLACES=514, PETRI_TRANSITIONS=704} [2024-06-03 20:24:33,903 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 471 predicate places. [2024-06-03 20:24:33,903 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 704 transitions, 10275 flow [2024-06-03 20:24:33,903 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:33,903 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:33,903 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:33,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:24:33,903 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:33,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:33,904 INFO L85 PathProgramCache]: Analyzing trace with hash -1625086296, now seen corresponding path program 27 times [2024-06-03 20:24:33,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:33,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827203731] [2024-06-03 20:24:33,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:33,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:33,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:34,663 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:34,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:34,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827203731] [2024-06-03 20:24:34,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827203731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:34,664 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:34,664 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:34,664 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760113574] [2024-06-03 20:24:34,664 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:34,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:34,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:34,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:34,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:24:34,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 704 transitions, 10275 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:34,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:34,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:24:34,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:36,905 INFO L124 PetriNetUnfolderBase]: 4622/7399 cut-off events. [2024-06-03 20:24:36,905 INFO L125 PetriNetUnfolderBase]: For 1285949/1285949 co-relation queries the response was YES. [2024-06-03 20:24:36,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67044 conditions, 7399 events. 4622/7399 cut-off events. For 1285949/1285949 co-relation queries the response was YES. Maximal size of possible extension queue 571. Compared 48603 event pairs, 829 based on Foata normal form. 4/7397 useless extension candidates. Maximal degree in co-relation 66820. Up to 6439 conditions per place. [2024-06-03 20:24:37,017 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 580 selfloop transitions, 151 changer transitions 0/736 dead transitions. [2024-06-03 20:24:37,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 736 transitions, 12255 flow [2024-06-03 20:24:37,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:37,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:37,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-03 20:24:37,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-03 20:24:37,019 INFO L175 Difference]: Start difference. First operand has 514 places, 704 transitions, 10275 flow. Second operand 8 states and 163 transitions. [2024-06-03 20:24:37,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 736 transitions, 12255 flow [2024-06-03 20:24:42,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 736 transitions, 11915 flow, removed 68 selfloop flow, removed 4 redundant places. [2024-06-03 20:24:42,935 INFO L231 Difference]: Finished difference. Result has 518 places, 704 transitions, 10244 flow [2024-06-03 20:24:42,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9935, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=151, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10244, PETRI_PLACES=518, PETRI_TRANSITIONS=704} [2024-06-03 20:24:42,936 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 475 predicate places. [2024-06-03 20:24:42,936 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 704 transitions, 10244 flow [2024-06-03 20:24:42,936 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:42,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:42,936 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:42,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:24:42,937 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:42,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:42,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1029977561, now seen corresponding path program 4 times [2024-06-03 20:24:42,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:42,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648389184] [2024-06-03 20:24:42,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:42,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:43,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:43,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:43,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648389184] [2024-06-03 20:24:43,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648389184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:43,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:43,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:43,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157599695] [2024-06-03 20:24:43,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:43,728 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:43,728 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:43,729 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:43,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:43,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:24:43,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 704 transitions, 10244 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:43,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:43,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:24:43,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:45,754 INFO L124 PetriNetUnfolderBase]: 4624/7417 cut-off events. [2024-06-03 20:24:45,754 INFO L125 PetriNetUnfolderBase]: For 1271741/1271741 co-relation queries the response was YES. [2024-06-03 20:24:45,852 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66801 conditions, 7417 events. 4624/7417 cut-off events. For 1271741/1271741 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 48824 event pairs, 850 based on Foata normal form. 2/7417 useless extension candidates. Maximal degree in co-relation 66576. Up to 6985 conditions per place. [2024-06-03 20:24:45,881 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 670 selfloop transitions, 49 changer transitions 0/724 dead transitions. [2024-06-03 20:24:45,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 524 places, 724 transitions, 11870 flow [2024-06-03 20:24:45,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:24:45,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:24:45,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 20:24:45,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-03 20:24:45,882 INFO L175 Difference]: Start difference. First operand has 518 places, 704 transitions, 10244 flow. Second operand 7 states and 134 transitions. [2024-06-03 20:24:45,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 524 places, 724 transitions, 11870 flow [2024-06-03 20:24:51,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 724 transitions, 11561 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-03 20:24:51,768 INFO L231 Difference]: Finished difference. Result has 519 places, 707 transitions, 10163 flow [2024-06-03 20:24:51,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9935, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=704, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=655, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10163, PETRI_PLACES=519, PETRI_TRANSITIONS=707} [2024-06-03 20:24:51,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-03 20:24:51,768 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 707 transitions, 10163 flow [2024-06-03 20:24:51,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:51,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:24:51,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:24:51,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:24:51,769 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:24:51,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:24:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1029969904, now seen corresponding path program 28 times [2024-06-03 20:24:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:24:51,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468783092] [2024-06-03 20:24:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:24:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:24:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:24:52,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:24:52,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:24:52,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468783092] [2024-06-03 20:24:52,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468783092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:24:52,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:24:52,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:24:52,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850667937] [2024-06-03 20:24:52,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:24:52,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:24:52,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:24:52,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:24:52,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:24:52,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:24:52,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 707 transitions, 10163 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:24:52,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:24:52,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:24:52,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:24:54,586 INFO L124 PetriNetUnfolderBase]: 4644/7437 cut-off events. [2024-06-03 20:24:54,587 INFO L125 PetriNetUnfolderBase]: For 1311720/1311720 co-relation queries the response was YES. [2024-06-03 20:24:54,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67218 conditions, 7437 events. 4644/7437 cut-off events. For 1311720/1311720 co-relation queries the response was YES. Maximal size of possible extension queue 577. Compared 48875 event pairs, 851 based on Foata normal form. 4/7439 useless extension candidates. Maximal degree in co-relation 66992. Up to 6999 conditions per place. [2024-06-03 20:24:54,715 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 684 selfloop transitions, 41 changer transitions 0/730 dead transitions. [2024-06-03 20:24:54,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 730 transitions, 11824 flow [2024-06-03 20:24:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:24:54,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:24:54,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 20:24:54,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 20:24:54,717 INFO L175 Difference]: Start difference. First operand has 519 places, 707 transitions, 10163 flow. Second operand 8 states and 147 transitions. [2024-06-03 20:24:54,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 730 transitions, 11824 flow [2024-06-03 20:25:00,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 730 transitions, 11626 flow, removed 43 selfloop flow, removed 8 redundant places. [2024-06-03 20:25:00,837 INFO L231 Difference]: Finished difference. Result has 519 places, 710 transitions, 10154 flow [2024-06-03 20:25:00,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9965, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=666, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10154, PETRI_PLACES=519, PETRI_TRANSITIONS=710} [2024-06-03 20:25:00,837 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 476 predicate places. [2024-06-03 20:25:00,838 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 710 transitions, 10154 flow [2024-06-03 20:25:00,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:00,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:00,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:00,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:25:00,838 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:00,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:00,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1244186202, now seen corresponding path program 29 times [2024-06-03 20:25:00,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:00,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106807561] [2024-06-03 20:25:00,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:00,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:00,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:01,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:01,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:01,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106807561] [2024-06-03 20:25:01,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106807561] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:01,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:01,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:01,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110975272] [2024-06-03 20:25:01,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:01,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:01,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:01,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:01,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:01,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:25:01,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 710 transitions, 10154 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:01,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:01,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:25:01,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:03,874 INFO L124 PetriNetUnfolderBase]: 4664/7475 cut-off events. [2024-06-03 20:25:03,874 INFO L125 PetriNetUnfolderBase]: For 1313889/1313889 co-relation queries the response was YES. [2024-06-03 20:25:03,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67445 conditions, 7475 events. 4664/7475 cut-off events. For 1313889/1313889 co-relation queries the response was YES. Maximal size of possible extension queue 581. Compared 49243 event pairs, 853 based on Foata normal form. 4/7477 useless extension candidates. Maximal degree in co-relation 67220. Up to 6803 conditions per place. [2024-06-03 20:25:03,987 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 648 selfloop transitions, 87 changer transitions 0/740 dead transitions. [2024-06-03 20:25:03,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 740 transitions, 12183 flow [2024-06-03 20:25:03,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:25:03,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:25:03,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-03 20:25:03,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-03 20:25:03,989 INFO L175 Difference]: Start difference. First operand has 519 places, 710 transitions, 10154 flow. Second operand 8 states and 157 transitions. [2024-06-03 20:25:03,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 740 transitions, 12183 flow [2024-06-03 20:25:09,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 740 transitions, 12037 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:10,003 INFO L231 Difference]: Finished difference. Result has 520 places, 713 transitions, 10291 flow [2024-06-03 20:25:10,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10010, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=626, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10291, PETRI_PLACES=520, PETRI_TRANSITIONS=713} [2024-06-03 20:25:10,004 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 477 predicate places. [2024-06-03 20:25:10,004 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 713 transitions, 10291 flow [2024-06-03 20:25:10,004 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:10,004 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:10,004 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:10,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:25:10,005 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:10,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:10,005 INFO L85 PathProgramCache]: Analyzing trace with hash 73867566, now seen corresponding path program 30 times [2024-06-03 20:25:10,005 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:10,005 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540303630] [2024-06-03 20:25:10,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:10,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:10,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:10,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:10,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:10,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540303630] [2024-06-03 20:25:10,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540303630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:10,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:10,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:10,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108931386] [2024-06-03 20:25:10,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:10,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:10,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:10,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:10,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:10,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:25:10,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 713 transitions, 10291 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:10,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:10,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:25:10,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:12,741 INFO L124 PetriNetUnfolderBase]: 4652/7447 cut-off events. [2024-06-03 20:25:12,741 INFO L125 PetriNetUnfolderBase]: For 1272861/1272861 co-relation queries the response was YES. [2024-06-03 20:25:12,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66697 conditions, 7447 events. 4652/7447 cut-off events. For 1272861/1272861 co-relation queries the response was YES. Maximal size of possible extension queue 579. Compared 48947 event pairs, 825 based on Foata normal form. 4/7449 useless extension candidates. Maximal degree in co-relation 66472. Up to 6795 conditions per place. [2024-06-03 20:25:12,866 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 645 selfloop transitions, 92 changer transitions 0/742 dead transitions. [2024-06-03 20:25:12,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 742 transitions, 11951 flow [2024-06-03 20:25:12,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:25:12,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:25:12,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-03 20:25:12,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-06-03 20:25:12,867 INFO L175 Difference]: Start difference. First operand has 520 places, 713 transitions, 10291 flow. Second operand 8 states and 159 transitions. [2024-06-03 20:25:12,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 742 transitions, 11951 flow [2024-06-03 20:25:18,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 520 places, 742 transitions, 11578 flow, removed 71 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:18,883 INFO L231 Difference]: Finished difference. Result has 521 places, 713 transitions, 10114 flow [2024-06-03 20:25:18,883 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9918, PETRI_DIFFERENCE_MINUEND_PLACES=513, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10114, PETRI_PLACES=521, PETRI_TRANSITIONS=713} [2024-06-03 20:25:18,883 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 478 predicate places. [2024-06-03 20:25:18,883 INFO L495 AbstractCegarLoop]: Abstraction has has 521 places, 713 transitions, 10114 flow [2024-06-03 20:25:18,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:18,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:18,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:18,884 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 20:25:18,884 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:18,884 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:18,884 INFO L85 PathProgramCache]: Analyzing trace with hash 558591501, now seen corresponding path program 15 times [2024-06-03 20:25:18,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:18,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305840421] [2024-06-03 20:25:18,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:18,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:18,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:19,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:19,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:19,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305840421] [2024-06-03 20:25:19,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305840421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:19,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:19,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:19,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056034068] [2024-06-03 20:25:19,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:19,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:19,783 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:19,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:19,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:19,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:25:19,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 521 places, 713 transitions, 10114 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:19,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:19,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:25:19,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:21,809 INFO L124 PetriNetUnfolderBase]: 4661/7458 cut-off events. [2024-06-03 20:25:21,810 INFO L125 PetriNetUnfolderBase]: For 1247807/1247807 co-relation queries the response was YES. [2024-06-03 20:25:21,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66218 conditions, 7458 events. 4661/7458 cut-off events. For 1247807/1247807 co-relation queries the response was YES. Maximal size of possible extension queue 580. Compared 49054 event pairs, 873 based on Foata normal form. 4/7460 useless extension candidates. Maximal degree in co-relation 65993. Up to 6878 conditions per place. [2024-06-03 20:25:21,936 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 639 selfloop transitions, 103 changer transitions 0/747 dead transitions. [2024-06-03 20:25:21,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 747 transitions, 11907 flow [2024-06-03 20:25:21,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:25:21,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:25:21,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-03 20:25:21,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-03 20:25:21,937 INFO L175 Difference]: Start difference. First operand has 521 places, 713 transitions, 10114 flow. Second operand 8 states and 158 transitions. [2024-06-03 20:25:21,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 747 transitions, 11907 flow [2024-06-03 20:25:27,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 519 places, 747 transitions, 11478 flow, removed 49 selfloop flow, removed 9 redundant places. [2024-06-03 20:25:27,999 INFO L231 Difference]: Finished difference. Result has 522 places, 722 transitions, 10246 flow [2024-06-03 20:25:28,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9685, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=713, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10246, PETRI_PLACES=522, PETRI_TRANSITIONS=722} [2024-06-03 20:25:28,000 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 479 predicate places. [2024-06-03 20:25:28,000 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 722 transitions, 10246 flow [2024-06-03 20:25:28,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:28,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:28,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:28,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 20:25:28,001 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:28,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:28,001 INFO L85 PathProgramCache]: Analyzing trace with hash 1150136058, now seen corresponding path program 1 times [2024-06-03 20:25:28,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:28,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138048442] [2024-06-03 20:25:28,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:28,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:28,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:29,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:29,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:29,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138048442] [2024-06-03 20:25:29,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138048442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:29,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:29,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:29,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096027046] [2024-06-03 20:25:29,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:29,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:29,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:29,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:29,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:29,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:25:29,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 722 transitions, 10246 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:29,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:29,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:25:29,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:31,356 INFO L124 PetriNetUnfolderBase]: 4669/7456 cut-off events. [2024-06-03 20:25:31,356 INFO L125 PetriNetUnfolderBase]: For 1245803/1245803 co-relation queries the response was YES. [2024-06-03 20:25:31,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66406 conditions, 7456 events. 4669/7456 cut-off events. For 1245803/1245803 co-relation queries the response was YES. Maximal size of possible extension queue 582. Compared 48949 event pairs, 990 based on Foata normal form. 2/7456 useless extension candidates. Maximal degree in co-relation 66179. Up to 7069 conditions per place. [2024-06-03 20:25:31,496 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 701 selfloop transitions, 41 changer transitions 0/747 dead transitions. [2024-06-03 20:25:31,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 747 transitions, 11928 flow [2024-06-03 20:25:31,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:25:31,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:25:31,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 186 transitions. [2024-06-03 20:25:31,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4025974025974026 [2024-06-03 20:25:31,497 INFO L175 Difference]: Start difference. First operand has 522 places, 722 transitions, 10246 flow. Second operand 11 states and 186 transitions. [2024-06-03 20:25:31,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 747 transitions, 11928 flow [2024-06-03 20:25:37,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 524 places, 747 transitions, 11669 flow, removed 61 selfloop flow, removed 8 redundant places. [2024-06-03 20:25:37,711 INFO L231 Difference]: Finished difference. Result has 526 places, 726 transitions, 10221 flow [2024-06-03 20:25:37,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9987, PETRI_DIFFERENCE_MINUEND_PLACES=514, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=722, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=682, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10221, PETRI_PLACES=526, PETRI_TRANSITIONS=726} [2024-06-03 20:25:37,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-03 20:25:37,711 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 726 transitions, 10221 flow [2024-06-03 20:25:37,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:37,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:37,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:37,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 20:25:37,712 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:37,712 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:37,712 INFO L85 PathProgramCache]: Analyzing trace with hash 1159181800, now seen corresponding path program 2 times [2024-06-03 20:25:37,712 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:37,712 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370455315] [2024-06-03 20:25:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:37,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:37,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:38,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:38,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:38,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370455315] [2024-06-03 20:25:38,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370455315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:38,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:38,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:38,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2099184517] [2024-06-03 20:25:38,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:38,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:38,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:38,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:38,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:38,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:25:38,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 726 transitions, 10221 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:38,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:38,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:25:38,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:40,652 INFO L124 PetriNetUnfolderBase]: 4677/7456 cut-off events. [2024-06-03 20:25:40,653 INFO L125 PetriNetUnfolderBase]: For 1184509/1184509 co-relation queries the response was YES. [2024-06-03 20:25:40,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65961 conditions, 7456 events. 4677/7456 cut-off events. For 1184509/1184509 co-relation queries the response was YES. Maximal size of possible extension queue 583. Compared 48875 event pairs, 1032 based on Foata normal form. 2/7456 useless extension candidates. Maximal degree in co-relation 65736. Up to 7085 conditions per place. [2024-06-03 20:25:40,782 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 705 selfloop transitions, 36 changer transitions 0/746 dead transitions. [2024-06-03 20:25:40,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 746 transitions, 11837 flow [2024-06-03 20:25:40,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:40,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:40,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-03 20:25:40,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:25:40,784 INFO L175 Difference]: Start difference. First operand has 526 places, 726 transitions, 10221 flow. Second operand 7 states and 133 transitions. [2024-06-03 20:25:40,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 746 transitions, 11837 flow [2024-06-03 20:25:46,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 525 places, 746 transitions, 11669 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-03 20:25:46,920 INFO L231 Difference]: Finished difference. Result has 526 places, 728 transitions, 10212 flow [2024-06-03 20:25:46,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10053, PETRI_DIFFERENCE_MINUEND_PLACES=519, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=690, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10212, PETRI_PLACES=526, PETRI_TRANSITIONS=728} [2024-06-03 20:25:46,920 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 483 predicate places. [2024-06-03 20:25:46,921 INFO L495 AbstractCegarLoop]: Abstraction has has 526 places, 728 transitions, 10212 flow [2024-06-03 20:25:46,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:46,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:46,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:46,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 20:25:46,922 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:46,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:46,922 INFO L85 PathProgramCache]: Analyzing trace with hash 1159189240, now seen corresponding path program 3 times [2024-06-03 20:25:46,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:46,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875946240] [2024-06-03 20:25:46,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:46,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:46,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:47,802 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:47,802 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:47,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875946240] [2024-06-03 20:25:47,802 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [875946240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:47,802 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:47,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:25:47,803 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105780411] [2024-06-03 20:25:47,803 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:47,804 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:25:47,804 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:47,804 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:25:47,804 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:25:47,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:25:47,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 526 places, 728 transitions, 10212 flow. Second operand has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:47,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:47,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:25:47,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:49,760 INFO L124 PetriNetUnfolderBase]: 4685/7462 cut-off events. [2024-06-03 20:25:49,760 INFO L125 PetriNetUnfolderBase]: For 1202790/1202790 co-relation queries the response was YES. [2024-06-03 20:25:49,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66178 conditions, 7462 events. 4685/7462 cut-off events. For 1202790/1202790 co-relation queries the response was YES. Maximal size of possible extension queue 585. Compared 48802 event pairs, 1036 based on Foata normal form. 2/7462 useless extension candidates. Maximal degree in co-relation 65951. Up to 7081 conditions per place. [2024-06-03 20:25:49,897 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 704 selfloop transitions, 36 changer transitions 0/745 dead transitions. [2024-06-03 20:25:49,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 745 transitions, 11816 flow [2024-06-03 20:25:49,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:49,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:49,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-03 20:25:49,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-03 20:25:49,898 INFO L175 Difference]: Start difference. First operand has 526 places, 728 transitions, 10212 flow. Second operand 7 states and 129 transitions. [2024-06-03 20:25:49,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 745 transitions, 11816 flow [2024-06-03 20:25:56,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 745 transitions, 11675 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 20:25:56,431 INFO L231 Difference]: Finished difference. Result has 528 places, 730 transitions, 10232 flow [2024-06-03 20:25:56,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10071, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=728, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=692, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10232, PETRI_PLACES=528, PETRI_TRANSITIONS=730} [2024-06-03 20:25:56,432 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 485 predicate places. [2024-06-03 20:25:56,432 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 730 transitions, 10232 flow [2024-06-03 20:25:56,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.8) internal successors, (118), 10 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:56,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:25:56,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:25:56,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 20:25:56,433 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:25:56,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:25:56,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1415682310, now seen corresponding path program 4 times [2024-06-03 20:25:56,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:25:56,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800134242] [2024-06-03 20:25:56,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:25:56,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:25:56,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:25:57,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:25:57,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:25:57,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800134242] [2024-06-03 20:25:57,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800134242] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:25:57,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:25:57,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:25:57,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801342070] [2024-06-03 20:25:57,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:25:57,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:25:57,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:25:57,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:25:57,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:25:57,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:25:57,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 730 transitions, 10232 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:25:57,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:25:57,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:25:57,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:25:59,639 INFO L124 PetriNetUnfolderBase]: 4693/7474 cut-off events. [2024-06-03 20:25:59,639 INFO L125 PetriNetUnfolderBase]: For 1219341/1219341 co-relation queries the response was YES. [2024-06-03 20:25:59,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66415 conditions, 7474 events. 4693/7474 cut-off events. For 1219341/1219341 co-relation queries the response was YES. Maximal size of possible extension queue 587. Compared 48861 event pairs, 1037 based on Foata normal form. 2/7474 useless extension candidates. Maximal degree in co-relation 66187. Up to 7094 conditions per place. [2024-06-03 20:25:59,755 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 699 selfloop transitions, 46 changer transitions 0/750 dead transitions. [2024-06-03 20:25:59,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 534 places, 750 transitions, 11864 flow [2024-06-03 20:25:59,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:25:59,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:25:59,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-03 20:25:59,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-03 20:25:59,756 INFO L175 Difference]: Start difference. First operand has 528 places, 730 transitions, 10232 flow. Second operand 7 states and 134 transitions. [2024-06-03 20:25:59,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 534 places, 750 transitions, 11864 flow [2024-06-03 20:26:05,293 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 750 transitions, 11721 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:05,301 INFO L231 Difference]: Finished difference. Result has 530 places, 732 transitions, 10279 flow [2024-06-03 20:26:05,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10089, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10279, PETRI_PLACES=530, PETRI_TRANSITIONS=732} [2024-06-03 20:26:05,302 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 487 predicate places. [2024-06-03 20:26:05,302 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 732 transitions, 10279 flow [2024-06-03 20:26:05,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:05,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:05,302 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:05,302 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 20:26:05,302 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:05,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:05,303 INFO L85 PathProgramCache]: Analyzing trace with hash 517165148, now seen corresponding path program 5 times [2024-06-03 20:26:05,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:05,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955622645] [2024-06-03 20:26:05,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:05,303 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:05,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:06,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:06,164 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:06,164 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955622645] [2024-06-03 20:26:06,164 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955622645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:06,164 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:06,164 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:06,164 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751767361] [2024-06-03 20:26:06,164 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:06,164 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:06,165 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:06,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:06,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:06,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:26:06,272 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 732 transitions, 10279 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:06,272 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:06,272 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:26:06,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:08,254 INFO L124 PetriNetUnfolderBase]: 4701/7494 cut-off events. [2024-06-03 20:26:08,255 INFO L125 PetriNetUnfolderBase]: For 1236038/1236038 co-relation queries the response was YES. [2024-06-03 20:26:08,355 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66693 conditions, 7494 events. 4701/7494 cut-off events. For 1236038/1236038 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 49118 event pairs, 1037 based on Foata normal form. 2/7494 useless extension candidates. Maximal degree in co-relation 66465. Up to 7076 conditions per place. [2024-06-03 20:26:08,383 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 695 selfloop transitions, 49 changer transitions 0/749 dead transitions. [2024-06-03 20:26:08,383 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 536 places, 749 transitions, 11899 flow [2024-06-03 20:26:08,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:26:08,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:26:08,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-03 20:26:08,384 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-03 20:26:08,384 INFO L175 Difference]: Start difference. First operand has 530 places, 732 transitions, 10279 flow. Second operand 7 states and 130 transitions. [2024-06-03 20:26:08,384 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 536 places, 749 transitions, 11899 flow [2024-06-03 20:26:14,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 749 transitions, 11729 flow, removed 43 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:14,254 INFO L231 Difference]: Finished difference. Result has 532 places, 734 transitions, 10307 flow [2024-06-03 20:26:14,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10113, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=732, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=683, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10307, PETRI_PLACES=532, PETRI_TRANSITIONS=734} [2024-06-03 20:26:14,254 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 489 predicate places. [2024-06-03 20:26:14,255 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 734 transitions, 10307 flow [2024-06-03 20:26:14,255 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:14,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:14,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:14,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 20:26:14,255 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:14,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:14,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1424886520, now seen corresponding path program 6 times [2024-06-03 20:26:14,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:14,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284662909] [2024-06-03 20:26:14,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:14,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:14,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:15,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:15,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284662909] [2024-06-03 20:26:15,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284662909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:15,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:15,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 20:26:15,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726209985] [2024-06-03 20:26:15,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:15,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 20:26:15,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:15,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 20:26:15,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 20:26:15,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:26:15,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 734 transitions, 10307 flow. Second operand has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:15,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:15,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:26:15,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:17,090 INFO L124 PetriNetUnfolderBase]: 4696/7501 cut-off events. [2024-06-03 20:26:17,091 INFO L125 PetriNetUnfolderBase]: For 1214526/1214526 co-relation queries the response was YES. [2024-06-03 20:26:17,190 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66205 conditions, 7501 events. 4696/7501 cut-off events. For 1214526/1214526 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 49254 event pairs, 1040 based on Foata normal form. 2/7501 useless extension candidates. Maximal degree in co-relation 65976. Up to 7157 conditions per place. [2024-06-03 20:26:17,217 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 726 selfloop transitions, 17 changer transitions 0/748 dead transitions. [2024-06-03 20:26:17,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 748 transitions, 11911 flow [2024-06-03 20:26:17,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:26:17,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:26:17,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 20:26:17,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 20:26:17,219 INFO L175 Difference]: Start difference. First operand has 532 places, 734 transitions, 10307 flow. Second operand 7 states and 122 transitions. [2024-06-03 20:26:17,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 748 transitions, 11911 flow [2024-06-03 20:26:22,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 748 transitions, 11748 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-03 20:26:22,762 INFO L231 Difference]: Finished difference. Result has 535 places, 736 transitions, 10275 flow [2024-06-03 20:26:22,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10148, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=717, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10275, PETRI_PLACES=535, PETRI_TRANSITIONS=736} [2024-06-03 20:26:22,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 492 predicate places. [2024-06-03 20:26:22,763 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 736 transitions, 10275 flow [2024-06-03 20:26:22,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.636363636363637) internal successors, (128), 11 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:22,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:22,763 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:22,763 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 20:26:22,763 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:22,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:22,764 INFO L85 PathProgramCache]: Analyzing trace with hash -681554418, now seen corresponding path program 1 times [2024-06-03 20:26:22,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:22,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446653664] [2024-06-03 20:26:22,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:22,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:22,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:23,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:23,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:23,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446653664] [2024-06-03 20:26:23,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446653664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:23,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:23,617 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:23,617 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978336654] [2024-06-03 20:26:23,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:23,618 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:23,618 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:23,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:23,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:23,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:26:23,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 736 transitions, 10275 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:23,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:23,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:26:23,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:25,818 INFO L124 PetriNetUnfolderBase]: 4701/7508 cut-off events. [2024-06-03 20:26:25,818 INFO L125 PetriNetUnfolderBase]: For 1202799/1202799 co-relation queries the response was YES. [2024-06-03 20:26:25,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66093 conditions, 7508 events. 4701/7508 cut-off events. For 1202799/1202799 co-relation queries the response was YES. Maximal size of possible extension queue 591. Compared 49292 event pairs, 860 based on Foata normal form. 1/7507 useless extension candidates. Maximal degree in co-relation 65863. Up to 7058 conditions per place. [2024-06-03 20:26:25,934 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 708 selfloop transitions, 55 changer transitions 0/768 dead transitions. [2024-06-03 20:26:25,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 768 transitions, 12281 flow [2024-06-03 20:26:25,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:25,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:25,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 20:26:25,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 20:26:25,935 INFO L175 Difference]: Start difference. First operand has 535 places, 736 transitions, 10275 flow. Second operand 9 states and 171 transitions. [2024-06-03 20:26:25,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 768 transitions, 12281 flow [2024-06-03 20:26:31,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 768 transitions, 12170 flow, removed 40 selfloop flow, removed 5 redundant places. [2024-06-03 20:26:31,894 INFO L231 Difference]: Finished difference. Result has 539 places, 739 transitions, 10389 flow [2024-06-03 20:26:31,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10164, PETRI_DIFFERENCE_MINUEND_PLACES=530, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=736, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=684, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10389, PETRI_PLACES=539, PETRI_TRANSITIONS=739} [2024-06-03 20:26:31,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 496 predicate places. [2024-06-03 20:26:31,895 INFO L495 AbstractCegarLoop]: Abstraction has has 539 places, 739 transitions, 10389 flow [2024-06-03 20:26:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:31,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:31,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:31,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 20:26:31,895 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:31,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash 2109284360, now seen corresponding path program 1 times [2024-06-03 20:26:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:31,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242061613] [2024-06-03 20:26:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:31,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:31,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:32,747 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:32,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:32,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242061613] [2024-06-03 20:26:32,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242061613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:32,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:32,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:32,747 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162984101] [2024-06-03 20:26:32,747 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:32,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:32,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:32,748 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:32,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:32,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:26:32,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 539 places, 739 transitions, 10389 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:32,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:32,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:26:32,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:34,792 INFO L124 PetriNetUnfolderBase]: 4719/7533 cut-off events. [2024-06-03 20:26:34,793 INFO L125 PetriNetUnfolderBase]: For 1240023/1240023 co-relation queries the response was YES. [2024-06-03 20:26:34,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66718 conditions, 7533 events. 4719/7533 cut-off events. For 1240023/1240023 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 49433 event pairs, 856 based on Foata normal form. 2/7533 useless extension candidates. Maximal degree in co-relation 66487. Up to 7067 conditions per place. [2024-06-03 20:26:34,920 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 714 selfloop transitions, 61 changer transitions 0/780 dead transitions. [2024-06-03 20:26:34,920 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 547 places, 780 transitions, 12611 flow [2024-06-03 20:26:34,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:34,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:34,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-03 20:26:34,921 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-03 20:26:34,921 INFO L175 Difference]: Start difference. First operand has 539 places, 739 transitions, 10389 flow. Second operand 9 states and 173 transitions. [2024-06-03 20:26:34,921 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 547 places, 780 transitions, 12611 flow [2024-06-03 20:26:40,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 780 transitions, 12273 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-03 20:26:40,746 INFO L231 Difference]: Finished difference. Result has 542 places, 752 transitions, 10520 flow [2024-06-03 20:26:40,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10051, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=739, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=681, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10520, PETRI_PLACES=542, PETRI_TRANSITIONS=752} [2024-06-03 20:26:40,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 499 predicate places. [2024-06-03 20:26:40,746 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 752 transitions, 10520 flow [2024-06-03 20:26:40,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:40,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:40,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:40,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 20:26:40,747 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:40,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:40,747 INFO L85 PathProgramCache]: Analyzing trace with hash -100799652, now seen corresponding path program 2 times [2024-06-03 20:26:40,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:40,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960405088] [2024-06-03 20:26:40,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:40,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:40,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:41,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:41,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960405088] [2024-06-03 20:26:41,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960405088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:41,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:41,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:41,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1697103751] [2024-06-03 20:26:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:41,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:41,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:41,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:26:41,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 752 transitions, 10520 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:41,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:41,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:26:41,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:43,663 INFO L124 PetriNetUnfolderBase]: 4716/7535 cut-off events. [2024-06-03 20:26:43,664 INFO L125 PetriNetUnfolderBase]: For 1241163/1241163 co-relation queries the response was YES. [2024-06-03 20:26:43,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67179 conditions, 7535 events. 4716/7535 cut-off events. For 1241163/1241163 co-relation queries the response was YES. Maximal size of possible extension queue 592. Compared 49489 event pairs, 855 based on Foata normal form. 1/7534 useless extension candidates. Maximal degree in co-relation 66946. Up to 7106 conditions per place. [2024-06-03 20:26:43,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 727 selfloop transitions, 45 changer transitions 0/777 dead transitions. [2024-06-03 20:26:43,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 550 places, 777 transitions, 12140 flow [2024-06-03 20:26:43,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:43,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:43,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:26:43,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 20:26:43,793 INFO L175 Difference]: Start difference. First operand has 542 places, 752 transitions, 10520 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:26:43,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 550 places, 777 transitions, 12140 flow [2024-06-03 20:26:49,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 546 places, 777 transitions, 11856 flow, removed 110 selfloop flow, removed 4 redundant places. [2024-06-03 20:26:49,970 INFO L231 Difference]: Finished difference. Result has 547 places, 752 transitions, 10332 flow [2024-06-03 20:26:49,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10236, PETRI_DIFFERENCE_MINUEND_PLACES=538, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=707, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10332, PETRI_PLACES=547, PETRI_TRANSITIONS=752} [2024-06-03 20:26:49,970 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 504 predicate places. [2024-06-03 20:26:49,971 INFO L495 AbstractCegarLoop]: Abstraction has has 547 places, 752 transitions, 10332 flow [2024-06-03 20:26:49,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:49,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:49,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:49,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 20:26:49,971 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:49,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:49,972 INFO L85 PathProgramCache]: Analyzing trace with hash -2008314266, now seen corresponding path program 2 times [2024-06-03 20:26:49,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:49,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731170894] [2024-06-03 20:26:49,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:49,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:49,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:50,739 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:50,739 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:50,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731170894] [2024-06-03 20:26:50,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731170894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:50,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:50,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:50,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536080573] [2024-06-03 20:26:50,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:50,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:50,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:50,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:50,740 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:50,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:26:50,832 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 547 places, 752 transitions, 10332 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:50,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:50,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:26:50,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:26:53,050 INFO L124 PetriNetUnfolderBase]: 4736/7559 cut-off events. [2024-06-03 20:26:53,050 INFO L125 PetriNetUnfolderBase]: For 1265961/1265961 co-relation queries the response was YES. [2024-06-03 20:26:53,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67265 conditions, 7559 events. 4736/7559 cut-off events. For 1265961/1265961 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 49573 event pairs, 854 based on Foata normal form. 2/7559 useless extension candidates. Maximal degree in co-relation 67031. Up to 7135 conditions per place. [2024-06-03 20:26:53,176 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 723 selfloop transitions, 56 changer transitions 0/784 dead transitions. [2024-06-03 20:26:53,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 784 transitions, 12121 flow [2024-06-03 20:26:53,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:26:53,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:26:53,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 20:26:53,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 20:26:53,178 INFO L175 Difference]: Start difference. First operand has 547 places, 752 transitions, 10332 flow. Second operand 9 states and 166 transitions. [2024-06-03 20:26:53,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 784 transitions, 12121 flow [2024-06-03 20:26:58,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 784 transitions, 11980 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:26:58,320 INFO L231 Difference]: Finished difference. Result has 549 places, 761 transitions, 10480 flow [2024-06-03 20:26:58,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10198, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=752, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10480, PETRI_PLACES=549, PETRI_TRANSITIONS=761} [2024-06-03 20:26:58,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 506 predicate places. [2024-06-03 20:26:58,321 INFO L495 AbstractCegarLoop]: Abstraction has has 549 places, 761 transitions, 10480 flow [2024-06-03 20:26:58,321 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:58,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:26:58,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:26:58,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 20:26:58,322 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:26:58,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:26:58,322 INFO L85 PathProgramCache]: Analyzing trace with hash -2008551416, now seen corresponding path program 3 times [2024-06-03 20:26:58,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:26:58,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857320211] [2024-06-03 20:26:58,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:26:58,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:26:58,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:26:59,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:26:59,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:26:59,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857320211] [2024-06-03 20:26:59,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1857320211] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:26:59,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:26:59,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:26:59,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996824068] [2024-06-03 20:26:59,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:26:59,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:26:59,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:26:59,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:26:59,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:26:59,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:26:59,208 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 549 places, 761 transitions, 10480 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:26:59,208 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:26:59,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:26:59,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:01,260 INFO L124 PetriNetUnfolderBase]: 4751/7582 cut-off events. [2024-06-03 20:27:01,261 INFO L125 PetriNetUnfolderBase]: For 1282421/1282421 co-relation queries the response was YES. [2024-06-03 20:27:01,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67589 conditions, 7582 events. 4751/7582 cut-off events. For 1282421/1282421 co-relation queries the response was YES. Maximal size of possible extension queue 596. Compared 49815 event pairs, 860 based on Foata normal form. 2/7582 useless extension candidates. Maximal degree in co-relation 67353. Up to 7147 conditions per place. [2024-06-03 20:27:01,398 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 725 selfloop transitions, 61 changer transitions 0/791 dead transitions. [2024-06-03 20:27:01,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 557 places, 791 transitions, 12248 flow [2024-06-03 20:27:01,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:01,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:01,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 20:27:01,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 20:27:01,417 INFO L175 Difference]: Start difference. First operand has 549 places, 761 transitions, 10480 flow. Second operand 9 states and 169 transitions. [2024-06-03 20:27:01,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 557 places, 791 transitions, 12248 flow [2024-06-03 20:27:08,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 552 places, 791 transitions, 12080 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-03 20:27:08,111 INFO L231 Difference]: Finished difference. Result has 554 places, 767 transitions, 10574 flow [2024-06-03 20:27:08,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10312, PETRI_DIFFERENCE_MINUEND_PLACES=544, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=761, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=700, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10574, PETRI_PLACES=554, PETRI_TRANSITIONS=767} [2024-06-03 20:27:08,112 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 511 predicate places. [2024-06-03 20:27:08,112 INFO L495 AbstractCegarLoop]: Abstraction has has 554 places, 767 transitions, 10574 flow [2024-06-03 20:27:08,112 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:08,112 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:08,112 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:08,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 20:27:08,113 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:08,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:08,113 INFO L85 PathProgramCache]: Analyzing trace with hash -1035675162, now seen corresponding path program 4 times [2024-06-03 20:27:08,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:08,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331089424] [2024-06-03 20:27:08,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:08,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:08,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:08,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:08,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:08,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331089424] [2024-06-03 20:27:08,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [331089424] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:08,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:08,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:08,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [777911731] [2024-06-03 20:27:08,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:08,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:08,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:08,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:08,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:08,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:27:08,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 554 places, 767 transitions, 10574 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:08,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:08,981 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:27:08,981 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:11,415 INFO L124 PetriNetUnfolderBase]: 4782/7623 cut-off events. [2024-06-03 20:27:11,415 INFO L125 PetriNetUnfolderBase]: For 1321344/1321344 co-relation queries the response was YES. [2024-06-03 20:27:11,509 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68452 conditions, 7623 events. 4782/7623 cut-off events. For 1321344/1321344 co-relation queries the response was YES. Maximal size of possible extension queue 601. Compared 50049 event pairs, 865 based on Foata normal form. 2/7623 useless extension candidates. Maximal degree in co-relation 68214. Up to 7187 conditions per place. [2024-06-03 20:27:11,534 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 733 selfloop transitions, 58 changer transitions 0/796 dead transitions. [2024-06-03 20:27:11,534 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 796 transitions, 12737 flow [2024-06-03 20:27:11,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:11,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:11,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 20:27:11,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 20:27:11,535 INFO L175 Difference]: Start difference. First operand has 554 places, 767 transitions, 10574 flow. Second operand 9 states and 165 transitions. [2024-06-03 20:27:11,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 796 transitions, 12737 flow [2024-06-03 20:27:17,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 556 places, 796 transitions, 12547 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 20:27:17,274 INFO L231 Difference]: Finished difference. Result has 558 places, 777 transitions, 10751 flow [2024-06-03 20:27:17,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10386, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=767, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=713, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10751, PETRI_PLACES=558, PETRI_TRANSITIONS=777} [2024-06-03 20:27:17,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 515 predicate places. [2024-06-03 20:27:17,275 INFO L495 AbstractCegarLoop]: Abstraction has has 558 places, 777 transitions, 10751 flow [2024-06-03 20:27:17,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:17,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:17,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:17,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 20:27:17,275 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:17,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:17,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1884048448, now seen corresponding path program 5 times [2024-06-03 20:27:17,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:17,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715518591] [2024-06-03 20:27:17,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:17,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:17,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:18,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:18,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:18,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715518591] [2024-06-03 20:27:18,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715518591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:18,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:18,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:18,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735254910] [2024-06-03 20:27:18,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:18,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:18,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:18,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:18,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:18,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:27:18,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 558 places, 777 transitions, 10751 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:18,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:18,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:27:18,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:20,294 INFO L124 PetriNetUnfolderBase]: 4797/7646 cut-off events. [2024-06-03 20:27:20,294 INFO L125 PetriNetUnfolderBase]: For 1337777/1337777 co-relation queries the response was YES. [2024-06-03 20:27:20,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68725 conditions, 7646 events. 4797/7646 cut-off events. For 1337777/1337777 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 50241 event pairs, 865 based on Foata normal form. 2/7646 useless extension candidates. Maximal degree in co-relation 68485. Up to 7219 conditions per place. [2024-06-03 20:27:20,431 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 739 selfloop transitions, 56 changer transitions 0/800 dead transitions. [2024-06-03 20:27:20,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 566 places, 800 transitions, 12528 flow [2024-06-03 20:27:20,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:20,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:20,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-03 20:27:20,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 20:27:20,432 INFO L175 Difference]: Start difference. First operand has 558 places, 777 transitions, 10751 flow. Second operand 9 states and 162 transitions. [2024-06-03 20:27:20,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 566 places, 800 transitions, 12528 flow [2024-06-03 20:27:26,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 563 places, 800 transitions, 12409 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-03 20:27:26,548 INFO L231 Difference]: Finished difference. Result has 564 places, 783 transitions, 10891 flow [2024-06-03 20:27:26,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10634, PETRI_DIFFERENCE_MINUEND_PLACES=555, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=777, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=724, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10891, PETRI_PLACES=564, PETRI_TRANSITIONS=783} [2024-06-03 20:27:26,548 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 521 predicate places. [2024-06-03 20:27:26,549 INFO L495 AbstractCegarLoop]: Abstraction has has 564 places, 783 transitions, 10891 flow [2024-06-03 20:27:26,549 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:26,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:26,549 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:26,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 20:27:26,549 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:26,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:26,550 INFO L85 PathProgramCache]: Analyzing trace with hash -1513150498, now seen corresponding path program 6 times [2024-06-03 20:27:26,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:26,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827372864] [2024-06-03 20:27:26,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:26,550 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:26,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:27,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:27,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827372864] [2024-06-03 20:27:27,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827372864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:27,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:27,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:27,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135483145] [2024-06-03 20:27:27,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:27,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:27,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:27,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:27,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:27,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:27:27,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 564 places, 783 transitions, 10891 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:27,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:27,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:27:27,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:29,582 INFO L124 PetriNetUnfolderBase]: 4791/7644 cut-off events. [2024-06-03 20:27:29,583 INFO L125 PetriNetUnfolderBase]: For 1331316/1331316 co-relation queries the response was YES. [2024-06-03 20:27:29,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68437 conditions, 7644 events. 4791/7644 cut-off events. For 1331316/1331316 co-relation queries the response was YES. Maximal size of possible extension queue 603. Compared 50252 event pairs, 866 based on Foata normal form. 2/7644 useless extension candidates. Maximal degree in co-relation 68195. Up to 7211 conditions per place. [2024-06-03 20:27:29,720 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 738 selfloop transitions, 57 changer transitions 0/800 dead transitions. [2024-06-03 20:27:29,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 572 places, 800 transitions, 12533 flow [2024-06-03 20:27:29,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:29,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:29,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 20:27:29,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-03 20:27:29,721 INFO L175 Difference]: Start difference. First operand has 564 places, 783 transitions, 10891 flow. Second operand 9 states and 161 transitions. [2024-06-03 20:27:29,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 572 places, 800 transitions, 12533 flow [2024-06-03 20:27:35,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 565 places, 800 transitions, 12269 flow, removed 76 selfloop flow, removed 7 redundant places. [2024-06-03 20:27:35,745 INFO L231 Difference]: Finished difference. Result has 566 places, 783 transitions, 10747 flow [2024-06-03 20:27:35,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10627, PETRI_DIFFERENCE_MINUEND_PLACES=557, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=726, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10747, PETRI_PLACES=566, PETRI_TRANSITIONS=783} [2024-06-03 20:27:35,746 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 523 predicate places. [2024-06-03 20:27:35,746 INFO L495 AbstractCegarLoop]: Abstraction has has 566 places, 783 transitions, 10747 flow [2024-06-03 20:27:35,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:35,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:35,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:35,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 20:27:35,747 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:35,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:35,747 INFO L85 PathProgramCache]: Analyzing trace with hash -883181820, now seen corresponding path program 1 times [2024-06-03 20:27:35,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:35,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723533200] [2024-06-03 20:27:35,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:35,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:35,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:36,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:36,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:36,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723533200] [2024-06-03 20:27:36,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723533200] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:36,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:36,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:36,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552695539] [2024-06-03 20:27:36,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:36,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:36,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:36,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:36,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:36,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:27:36,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 566 places, 783 transitions, 10747 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:36,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:36,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:27:36,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:27:39,071 INFO L124 PetriNetUnfolderBase]: 4887/7806 cut-off events. [2024-06-03 20:27:39,071 INFO L125 PetriNetUnfolderBase]: For 1415008/1415008 co-relation queries the response was YES. [2024-06-03 20:27:39,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69289 conditions, 7806 events. 4887/7806 cut-off events. For 1415008/1415008 co-relation queries the response was YES. Maximal size of possible extension queue 612. Compared 51553 event pairs, 776 based on Foata normal form. 8/7812 useless extension candidates. Maximal degree in co-relation 69047. Up to 7064 conditions per place. [2024-06-03 20:27:39,210 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 744 selfloop transitions, 76 changer transitions 0/825 dead transitions. [2024-06-03 20:27:39,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 574 places, 825 transitions, 12975 flow [2024-06-03 20:27:39,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:27:39,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:27:39,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-03 20:27:39,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47354497354497355 [2024-06-03 20:27:39,212 INFO L175 Difference]: Start difference. First operand has 566 places, 783 transitions, 10747 flow. Second operand 9 states and 179 transitions. [2024-06-03 20:27:39,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 574 places, 825 transitions, 12975 flow [2024-06-03 20:27:46,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 568 places, 825 transitions, 12857 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:27:46,104 INFO L231 Difference]: Finished difference. Result has 571 places, 789 transitions, 10890 flow [2024-06-03 20:27:46,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10629, PETRI_DIFFERENCE_MINUEND_PLACES=560, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=783, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=709, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10890, PETRI_PLACES=571, PETRI_TRANSITIONS=789} [2024-06-03 20:27:46,105 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 528 predicate places. [2024-06-03 20:27:46,105 INFO L495 AbstractCegarLoop]: Abstraction has has 571 places, 789 transitions, 10890 flow [2024-06-03 20:27:46,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:46,105 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:27:46,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:27:46,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 20:27:46,106 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:27:46,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:27:46,106 INFO L85 PathProgramCache]: Analyzing trace with hash 1498898612, now seen corresponding path program 2 times [2024-06-03 20:27:46,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:27:46,106 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459225732] [2024-06-03 20:27:46,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:27:46,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:27:46,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:27:46,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:27:46,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:27:46,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459225732] [2024-06-03 20:27:46,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459225732] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:27:46,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:27:46,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:27:46,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665295221] [2024-06-03 20:27:46,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:27:46,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:27:46,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:27:46,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:27:46,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:27:47,065 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 20:27:47,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 571 places, 789 transitions, 10890 flow. Second operand has 10 states, 10 states have (on average 11.7) internal successors, (117), 10 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:27:47,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:27:47,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 20:27:47,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand Killed by 15