./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix033.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version eb4cb34f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i ./goblint.2024-06-19_11-23-25.files/protection/mix033.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-eb4cb34-m [2024-06-21 16:41:45,110 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-21 16:41:45,184 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-21 16:41:45,189 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-21 16:41:45,189 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-21 16:41:45,214 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-21 16:41:45,222 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-21 16:41:45,223 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-21 16:41:45,223 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-21 16:41:45,224 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-21 16:41:45,224 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-21 16:41:45,225 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-21 16:41:45,226 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-21 16:41:45,227 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-21 16:41:45,227 INFO L153 SettingsManager]: * Use SBE=true [2024-06-21 16:41:45,228 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-21 16:41:45,228 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-21 16:41:45,231 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-21 16:41:45,231 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-21 16:41:45,231 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-21 16:41:45,231 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-21 16:41:45,232 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-21 16:41:45,232 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-21 16:41:45,232 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-21 16:41:45,232 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-21 16:41:45,233 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-21 16:41:45,233 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-21 16:41:45,233 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-21 16:41:45,233 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-21 16:41:45,234 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-21 16:41:45,234 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-21 16:41:45,235 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-21 16:41:45,235 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:41:45,235 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-21 16:41:45,235 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-21 16:41:45,235 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-21 16:41:45,236 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-21 16:41:45,236 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-21 16:41:45,236 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-21 16:41:45,236 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-21 16:41:45,236 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-21 16:41:45,237 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-21 16:41:45,237 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-21 16:41:45,237 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-21 16:41:45,427 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-21 16:41:45,447 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-21 16:41:45,449 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-21 16:41:45,450 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-21 16:41:45,450 INFO L274 PluginConnector]: CDTParser initialized [2024-06-21 16:41:45,451 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-21 16:41:46,515 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-21 16:41:46,750 INFO L384 CDTParser]: Found 1 translation units. [2024-06-21 16:41:46,753 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix033.opt.i [2024-06-21 16:41:46,772 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0237537f9/394229adf97d437abb74b08548850604/FLAGe00fad214 [2024-06-21 16:41:46,786 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/0237537f9/394229adf97d437abb74b08548850604 [2024-06-21 16:41:46,788 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-21 16:41:46,789 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-21 16:41:46,790 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix033.opt.yml/witness.yml [2024-06-21 16:41:46,934 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-21 16:41:46,935 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-21 16:41:46,938 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-21 16:41:46,938 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-21 16:41:46,942 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-21 16:41:46,942 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:41:46" (1/2) ... [2024-06-21 16:41:46,943 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@551d17d4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:41:46, skipping insertion in model container [2024-06-21 16:41:46,943 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.06 04:41:46" (1/2) ... [2024-06-21 16:41:46,945 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@773d7d65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.06 04:41:46, skipping insertion in model container [2024-06-21 16:41:46,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:41:46" (2/2) ... [2024-06-21 16:41:46,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@551d17d4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:46, skipping insertion in model container [2024-06-21 16:41:46,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:41:46" (2/2) ... [2024-06-21 16:41:46,947 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-21 16:41:47,030 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-21 16:41:47,031 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 16:41:47,031 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 16:41:47,032 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((((! multithreaded || ((x == 0 || x == 1) || x == 2)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || (b == 0 || b == 1))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || (a == 0 || a == 1))) && (! multithreaded || (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (z == 0 || z == 1))) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || z$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0) [2024-06-21 16:41:47,032 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-21 16:41:47,032 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-21 16:41:47,068 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-21 16:41:47,378 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:41:47,385 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-21 16:41:47,463 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-21 16:41:47,491 INFO L206 MainTranslator]: Completed translation [2024-06-21 16:41:47,491 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47 WrapperNode [2024-06-21 16:41:47,492 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-21 16:41:47,492 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-21 16:41:47,492 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-21 16:41:47,493 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-21 16:41:47,497 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,508 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,531 INFO L138 Inliner]: procedures = 175, calls = 51, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 135 [2024-06-21 16:41:47,531 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-21 16:41:47,532 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-21 16:41:47,532 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-21 16:41:47,532 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-21 16:41:47,540 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,540 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,542 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,553 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-21 16:41:47,560 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,560 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,567 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,581 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,583 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,584 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,586 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-21 16:41:47,587 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-21 16:41:47,587 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-21 16:41:47,587 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-21 16:41:47,600 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (1/1) ... [2024-06-21 16:41:47,605 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-21 16:41:47,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-21 16:41:47,625 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-21 16:41:47,633 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-21 16:41:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-21 16:41:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-21 16:41:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-21 16:41:47,656 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-21 16:41:47,656 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-21 16:41:47,657 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-21 16:41:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-21 16:41:47,657 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-21 16:41:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-21 16:41:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-21 16:41:47,657 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-21 16:41:47,657 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-21 16:41:47,658 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-21 16:41:47,784 INFO L244 CfgBuilder]: Building ICFG [2024-06-21 16:41:47,786 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-21 16:41:48,049 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-21 16:41:48,049 INFO L293 CfgBuilder]: Performing block encoding [2024-06-21 16:41:48,207 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-21 16:41:48,207 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-21 16:41:48,208 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:41:48 BoogieIcfgContainer [2024-06-21 16:41:48,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-21 16:41:48,210 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-21 16:41:48,210 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-21 16:41:48,212 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-21 16:41:48,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.06 04:41:46" (1/4) ... [2024-06-21 16:41:48,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3971803 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.06 04:41:48, skipping insertion in model container [2024-06-21 16:41:48,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 21.06 04:41:46" (2/4) ... [2024-06-21 16:41:48,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3971803 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:41:48, skipping insertion in model container [2024-06-21 16:41:48,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 21.06 04:41:47" (3/4) ... [2024-06-21 16:41:48,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3971803 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 21.06 04:41:48, skipping insertion in model container [2024-06-21 16:41:48,215 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.06 04:41:48" (4/4) ... [2024-06-21 16:41:48,215 INFO L112 eAbstractionObserver]: Analyzing ICFG mix033.opt.i [2024-06-21 16:41:48,227 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-21 16:41:48,228 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-21 16:41:48,228 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-21 16:41:48,269 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-21 16:41:48,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 16:41:48,320 INFO L124 PetriNetUnfolderBase]: 0/41 cut-off events. [2024-06-21 16:41:48,321 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:41:48,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51 conditions, 41 events. 0/41 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 73 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-21 16:41:48,322 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 44 transitions, 100 flow [2024-06-21 16:41:48,325 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 45 places, 35 transitions, 79 flow [2024-06-21 16:41:48,334 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-21 16:41:48,339 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;@695967f9, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-21 16:41:48,340 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-21 16:41:48,346 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-21 16:41:48,346 INFO L124 PetriNetUnfolderBase]: 0/5 cut-off events. [2024-06-21 16:41:48,346 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-21 16:41:48,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:48,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-21 16:41:48,347 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:48,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:48,351 INFO L85 PathProgramCache]: Analyzing trace with hash 368421363, now seen corresponding path program 1 times [2024-06-21 16:41:48,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:48,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [883792693] [2024-06-21 16:41:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:48,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:48,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:49,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:49,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:49,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [883792693] [2024-06-21 16:41:49,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [883792693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:49,621 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:49,621 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-21 16:41:49,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498631703] [2024-06-21 16:41:49,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:49,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-21 16:41:49,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:49,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-21 16:41:49,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-21 16:41:49,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 44 [2024-06-21 16:41:49,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 35 transitions, 79 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:49,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:49,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 44 [2024-06-21 16:41:49,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:50,056 INFO L124 PetriNetUnfolderBase]: 1359/2199 cut-off events. [2024-06-21 16:41:50,056 INFO L125 PetriNetUnfolderBase]: For 34/34 co-relation queries the response was YES. [2024-06-21 16:41:50,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4313 conditions, 2199 events. 1359/2199 cut-off events. For 34/34 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 11527 event pairs, 941 based on Foata normal form. 1/2116 useless extension candidates. Maximal degree in co-relation 4301. Up to 2029 conditions per place. [2024-06-21 16:41:50,072 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 32 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-21 16:41:50,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 45 transitions, 177 flow [2024-06-21 16:41:50,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-21 16:41:50,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-21 16:41:50,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-21 16:41:50,082 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-06-21 16:41:50,083 INFO L175 Difference]: Start difference. First operand has 45 places, 35 transitions, 79 flow. Second operand 3 states and 84 transitions. [2024-06-21 16:41:50,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 45 transitions, 177 flow [2024-06-21 16:41:50,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 45 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:50,090 INFO L231 Difference]: Finished difference. Result has 45 places, 38 transitions, 106 flow [2024-06-21 16:41:50,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=106, PETRI_PLACES=45, PETRI_TRANSITIONS=38} [2024-06-21 16:41:50,094 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 0 predicate places. [2024-06-21 16:41:50,094 INFO L495 AbstractCegarLoop]: Abstraction has has 45 places, 38 transitions, 106 flow [2024-06-21 16:41:50,094 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:50,094 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:50,094 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:50,094 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-21 16:41:50,095 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:50,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:50,096 INFO L85 PathProgramCache]: Analyzing trace with hash 1865755786, now seen corresponding path program 1 times [2024-06-21 16:41:50,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:50,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632818916] [2024-06-21 16:41:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:50,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:50,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:50,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:50,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632818916] [2024-06-21 16:41:50,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632818916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:50,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:50,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-21 16:41:50,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532776165] [2024-06-21 16:41:50,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:50,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-21 16:41:50,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-21 16:41:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-21 16:41:50,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:41:50,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 38 transitions, 106 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:50,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:50,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:41:50,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:51,133 INFO L124 PetriNetUnfolderBase]: 1560/2437 cut-off events. [2024-06-21 16:41:51,134 INFO L125 PetriNetUnfolderBase]: For 455/455 co-relation queries the response was YES. [2024-06-21 16:41:51,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5453 conditions, 2437 events. 1560/2437 cut-off events. For 455/455 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12451 event pairs, 930 based on Foata normal form. 3/2405 useless extension candidates. Maximal degree in co-relation 5441. Up to 2302 conditions per place. [2024-06-21 16:41:51,144 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 40 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-21 16:41:51,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 55 transitions, 246 flow [2024-06-21 16:41:51,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-21 16:41:51,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-21 16:41:51,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 106 transitions. [2024-06-21 16:41:51,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-21 16:41:51,146 INFO L175 Difference]: Start difference. First operand has 45 places, 38 transitions, 106 flow. Second operand 4 states and 106 transitions. [2024-06-21 16:41:51,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 55 transitions, 246 flow [2024-06-21 16:41:51,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 55 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-21 16:41:51,147 INFO L231 Difference]: Finished difference. Result has 48 places, 41 transitions, 142 flow [2024-06-21 16:41:51,147 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=142, PETRI_PLACES=48, PETRI_TRANSITIONS=41} [2024-06-21 16:41:51,148 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 3 predicate places. [2024-06-21 16:41:51,148 INFO L495 AbstractCegarLoop]: Abstraction has has 48 places, 41 transitions, 142 flow [2024-06-21 16:41:51,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:51,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:51,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:51,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-21 16:41:51,149 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:51,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:51,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2003855482, now seen corresponding path program 1 times [2024-06-21 16:41:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:51,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625001734] [2024-06-21 16:41:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:51,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:51,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:51,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625001734] [2024-06-21 16:41:51,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625001734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:51,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:51,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-21 16:41:51,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410986784] [2024-06-21 16:41:51,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:51,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-21 16:41:51,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:51,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-21 16:41:51,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-21 16:41:52,023 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:41:52,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 41 transitions, 142 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:52,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:52,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:41:52,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:52,316 INFO L124 PetriNetUnfolderBase]: 1568/2497 cut-off events. [2024-06-21 16:41:52,316 INFO L125 PetriNetUnfolderBase]: For 1343/1343 co-relation queries the response was YES. [2024-06-21 16:41:52,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6130 conditions, 2497 events. 1568/2497 cut-off events. For 1343/1343 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13125 event pairs, 669 based on Foata normal form. 5/2485 useless extension candidates. Maximal degree in co-relation 6116. Up to 2248 conditions per place. [2024-06-21 16:41:52,327 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 53 selfloop transitions, 16 changer transitions 0/77 dead transitions. [2024-06-21 16:41:52,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 77 transitions, 400 flow [2024-06-21 16:41:52,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:41:52,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:41:52,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-06-21 16:41:52,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-06-21 16:41:52,329 INFO L175 Difference]: Start difference. First operand has 48 places, 41 transitions, 142 flow. Second operand 5 states and 138 transitions. [2024-06-21 16:41:52,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 77 transitions, 400 flow [2024-06-21 16:41:52,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-21 16:41:52,332 INFO L231 Difference]: Finished difference. Result has 53 places, 52 transitions, 241 flow [2024-06-21 16:41:52,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=128, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=241, PETRI_PLACES=53, PETRI_TRANSITIONS=52} [2024-06-21 16:41:52,333 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 8 predicate places. [2024-06-21 16:41:52,333 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 52 transitions, 241 flow [2024-06-21 16:41:52,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:52,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:52,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:52,334 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-21 16:41:52,334 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:52,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:52,334 INFO L85 PathProgramCache]: Analyzing trace with hash -1875696655, now seen corresponding path program 1 times [2024-06-21 16:41:52,334 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:52,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [903429821] [2024-06-21 16:41:52,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:52,335 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:52,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:53,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:53,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:53,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [903429821] [2024-06-21 16:41:53,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [903429821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:53,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:53,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:41:53,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620458949] [2024-06-21 16:41:53,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:53,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:41:53,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:53,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:41:53,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:41:53,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 44 [2024-06-21 16:41:53,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 52 transitions, 241 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:53,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:53,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 44 [2024-06-21 16:41:53,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:53,663 INFO L124 PetriNetUnfolderBase]: 1580/2517 cut-off events. [2024-06-21 16:41:53,663 INFO L125 PetriNetUnfolderBase]: For 3179/3181 co-relation queries the response was YES. [2024-06-21 16:41:53,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7274 conditions, 2517 events. 1580/2517 cut-off events. For 3179/3181 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13210 event pairs, 481 based on Foata normal form. 12/2512 useless extension candidates. Maximal degree in co-relation 7257. Up to 2216 conditions per place. [2024-06-21 16:41:53,675 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 57 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-21 16:41:53,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 84 transitions, 503 flow [2024-06-21 16:41:53,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:53,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 159 transitions. [2024-06-21 16:41:53,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6022727272727273 [2024-06-21 16:41:53,677 INFO L175 Difference]: Start difference. First operand has 53 places, 52 transitions, 241 flow. Second operand 6 states and 159 transitions. [2024-06-21 16:41:53,677 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 84 transitions, 503 flow [2024-06-21 16:41:53,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 84 transitions, 495 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-21 16:41:53,680 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 297 flow [2024-06-21 16:41:53,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=225, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=297, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-21 16:41:53,681 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 13 predicate places. [2024-06-21 16:41:53,681 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 297 flow [2024-06-21 16:41:53,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:53,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:53,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:53,682 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-21 16:41:53,682 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:53,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:53,682 INFO L85 PathProgramCache]: Analyzing trace with hash 1953014575, now seen corresponding path program 1 times [2024-06-21 16:41:53,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:53,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208324704] [2024-06-21 16:41:53,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:53,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:53,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:54,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:54,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:54,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208324704] [2024-06-21 16:41:54,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208324704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:54,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:54,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:41:54,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565646456] [2024-06-21 16:41:54,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:54,228 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:41:54,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:54,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:41:54,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:41:54,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:41:54,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 297 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:54,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:54,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:41:54,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:54,641 INFO L124 PetriNetUnfolderBase]: 1368/2246 cut-off events. [2024-06-21 16:41:54,642 INFO L125 PetriNetUnfolderBase]: For 4097/4097 co-relation queries the response was YES. [2024-06-21 16:41:54,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7017 conditions, 2246 events. 1368/2246 cut-off events. For 4097/4097 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 12065 event pairs, 562 based on Foata normal form. 2/2213 useless extension candidates. Maximal degree in co-relation 6996. Up to 2036 conditions per place. [2024-06-21 16:41:54,653 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 49 selfloop transitions, 8 changer transitions 0/65 dead transitions. [2024-06-21 16:41:54,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 65 transitions, 439 flow [2024-06-21 16:41:54,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:41:54,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:41:54,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2024-06-21 16:41:54,654 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:41:54,654 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 297 flow. Second operand 5 states and 110 transitions. [2024-06-21 16:41:54,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 65 transitions, 439 flow [2024-06-21 16:41:54,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 65 transitions, 389 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:54,658 INFO L231 Difference]: Finished difference. Result has 59 places, 54 transitions, 271 flow [2024-06-21 16:41:54,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=247, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=271, PETRI_PLACES=59, PETRI_TRANSITIONS=54} [2024-06-21 16:41:54,658 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 14 predicate places. [2024-06-21 16:41:54,658 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 54 transitions, 271 flow [2024-06-21 16:41:54,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:54,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:54,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:54,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-21 16:41:54,659 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:54,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:54,660 INFO L85 PathProgramCache]: Analyzing trace with hash 412930851, now seen corresponding path program 1 times [2024-06-21 16:41:54,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:54,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576985415] [2024-06-21 16:41:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:54,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:55,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:55,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:55,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576985415] [2024-06-21 16:41:55,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1576985415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:55,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:55,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:41:55,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824786580] [2024-06-21 16:41:55,271 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:55,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:41:55,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:55,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:41:55,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:41:55,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:55,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 54 transitions, 271 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:55,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:55,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:55,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:55,808 INFO L124 PetriNetUnfolderBase]: 1606/2615 cut-off events. [2024-06-21 16:41:55,809 INFO L125 PetriNetUnfolderBase]: For 5550/5550 co-relation queries the response was YES. [2024-06-21 16:41:55,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8115 conditions, 2615 events. 1606/2615 cut-off events. For 5550/5550 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13935 event pairs, 676 based on Foata normal form. 2/2594 useless extension candidates. Maximal degree in co-relation 8092. Up to 2373 conditions per place. [2024-06-21 16:41:55,828 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 54 selfloop transitions, 11 changer transitions 0/72 dead transitions. [2024-06-21 16:41:55,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 72 transitions, 457 flow [2024-06-21 16:41:55,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:55,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:55,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 16:41:55,830 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 16:41:55,830 INFO L175 Difference]: Start difference. First operand has 59 places, 54 transitions, 271 flow. Second operand 6 states and 125 transitions. [2024-06-21 16:41:55,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 72 transitions, 457 flow [2024-06-21 16:41:55,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 72 transitions, 435 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:55,835 INFO L231 Difference]: Finished difference. Result has 61 places, 57 transitions, 303 flow [2024-06-21 16:41:55,835 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=249, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=303, PETRI_PLACES=61, PETRI_TRANSITIONS=57} [2024-06-21 16:41:55,837 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 16 predicate places. [2024-06-21 16:41:55,837 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 57 transitions, 303 flow [2024-06-21 16:41:55,837 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:55,837 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:55,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:55,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-21 16:41:55,838 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:55,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:55,838 INFO L85 PathProgramCache]: Analyzing trace with hash -60128702, now seen corresponding path program 1 times [2024-06-21 16:41:55,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:55,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034066485] [2024-06-21 16:41:55,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:55,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:55,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:56,403 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:56,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:56,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034066485] [2024-06-21 16:41:56,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034066485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:56,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:56,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:41:56,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1037117170] [2024-06-21 16:41:56,405 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:56,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:41:56,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:56,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:41:56,407 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:41:56,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:56,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 57 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:56,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:56,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:56,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:56,977 INFO L124 PetriNetUnfolderBase]: 1746/2777 cut-off events. [2024-06-21 16:41:56,977 INFO L125 PetriNetUnfolderBase]: For 8534/8538 co-relation queries the response was YES. [2024-06-21 16:41:56,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9396 conditions, 2777 events. 1746/2777 cut-off events. For 8534/8538 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14611 event pairs, 726 based on Foata normal form. 8/2773 useless extension candidates. Maximal degree in co-relation 9373. Up to 2505 conditions per place. [2024-06-21 16:41:56,991 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 53 selfloop transitions, 19 changer transitions 0/80 dead transitions. [2024-06-21 16:41:56,991 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 80 transitions, 543 flow [2024-06-21 16:41:56,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:56,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:56,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 134 transitions. [2024-06-21 16:41:56,992 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5075757575757576 [2024-06-21 16:41:56,992 INFO L175 Difference]: Start difference. First operand has 61 places, 57 transitions, 303 flow. Second operand 6 states and 134 transitions. [2024-06-21 16:41:56,993 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 80 transitions, 543 flow [2024-06-21 16:41:56,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 80 transitions, 513 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-21 16:41:56,998 INFO L231 Difference]: Finished difference. Result has 63 places, 60 transitions, 345 flow [2024-06-21 16:41:56,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=345, PETRI_PLACES=63, PETRI_TRANSITIONS=60} [2024-06-21 16:41:56,998 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 18 predicate places. [2024-06-21 16:41:56,998 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 60 transitions, 345 flow [2024-06-21 16:41:56,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:56,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:56,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:56,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-21 16:41:56,999 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:56,999 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:56,999 INFO L85 PathProgramCache]: Analyzing trace with hash -53665202, now seen corresponding path program 2 times [2024-06-21 16:41:57,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:57,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304467282] [2024-06-21 16:41:57,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:57,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:57,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:57,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:57,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:57,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304467282] [2024-06-21 16:41:57,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304467282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:57,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:57,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:41:57,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447462643] [2024-06-21 16:41:57,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:57,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:41:57,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:57,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:41:57,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:41:57,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:57,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 60 transitions, 345 flow. Second operand has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:57,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:57,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:57,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:58,264 INFO L124 PetriNetUnfolderBase]: 1734/2750 cut-off events. [2024-06-21 16:41:58,264 INFO L125 PetriNetUnfolderBase]: For 10309/10309 co-relation queries the response was YES. [2024-06-21 16:41:58,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9632 conditions, 2750 events. 1734/2750 cut-off events. For 10309/10309 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 14424 event pairs, 740 based on Foata normal form. 2/2739 useless extension candidates. Maximal degree in co-relation 9608. Up to 2489 conditions per place. [2024-06-21 16:41:58,279 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 47 selfloop transitions, 20 changer transitions 0/75 dead transitions. [2024-06-21 16:41:58,279 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 75 transitions, 517 flow [2024-06-21 16:41:58,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:41:58,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:41:58,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 130 transitions. [2024-06-21 16:41:58,280 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-21 16:41:58,281 INFO L175 Difference]: Start difference. First operand has 63 places, 60 transitions, 345 flow. Second operand 6 states and 130 transitions. [2024-06-21 16:41:58,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 75 transitions, 517 flow [2024-06-21 16:41:58,285 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 75 transitions, 488 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-21 16:41:58,286 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 364 flow [2024-06-21 16:41:58,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=364, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-06-21 16:41:58,287 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 21 predicate places. [2024-06-21 16:41:58,287 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 364 flow [2024-06-21 16:41:58,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.428571428571429) internal successors, (94), 7 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:58,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:58,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:58,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-21 16:41:58,288 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:58,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:58,288 INFO L85 PathProgramCache]: Analyzing trace with hash -998329876, now seen corresponding path program 1 times [2024-06-21 16:41:58,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:58,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223526699] [2024-06-21 16:41:58,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:58,289 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:58,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:41:59,006 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:41:59,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:41:59,006 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223526699] [2024-06-21 16:41:59,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1223526699] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:41:59,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:41:59,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:41:59,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327246250] [2024-06-21 16:41:59,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:41:59,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:41:59,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:41:59,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:41:59,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:41:59,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:41:59,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 364 flow. Second operand has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:59,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:41:59,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:41:59,130 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:41:59,608 INFO L124 PetriNetUnfolderBase]: 1590/2610 cut-off events. [2024-06-21 16:41:59,608 INFO L125 PetriNetUnfolderBase]: For 10273/10273 co-relation queries the response was YES. [2024-06-21 16:41:59,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9112 conditions, 2610 events. 1590/2610 cut-off events. For 10273/10273 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 14019 event pairs, 634 based on Foata normal form. 4/2603 useless extension candidates. Maximal degree in co-relation 9087. Up to 2330 conditions per place. [2024-06-21 16:41:59,622 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 62 selfloop transitions, 14 changer transitions 0/83 dead transitions. [2024-06-21 16:41:59,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 83 transitions, 588 flow [2024-06-21 16:41:59,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:41:59,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:41:59,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 16:41:59,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-21 16:41:59,623 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 364 flow. Second operand 7 states and 145 transitions. [2024-06-21 16:41:59,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 83 transitions, 588 flow [2024-06-21 16:41:59,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 83 transitions, 523 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:41:59,630 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 363 flow [2024-06-21 16:41:59,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=363, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-06-21 16:41:59,631 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 22 predicate places. [2024-06-21 16:41:59,631 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 363 flow [2024-06-21 16:41:59,631 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.375) internal successors, (107), 8 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:41:59,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:41:59,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:41:59,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-21 16:41:59,631 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:41:59,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:41:59,632 INFO L85 PathProgramCache]: Analyzing trace with hash -1060831230, now seen corresponding path program 1 times [2024-06-21 16:41:59,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:41:59,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333391361] [2024-06-21 16:41:59,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:41:59,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:41:59,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:00,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:00,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:00,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333391361] [2024-06-21 16:42:00,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333391361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:00,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:00,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:00,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1654627677] [2024-06-21 16:42:00,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:00,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:00,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:00,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:00,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:00,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:00,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 363 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:00,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:00,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:00,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:00,996 INFO L124 PetriNetUnfolderBase]: 1856/2895 cut-off events. [2024-06-21 16:42:00,997 INFO L125 PetriNetUnfolderBase]: For 14786/14790 co-relation queries the response was YES. [2024-06-21 16:42:01,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10876 conditions, 2895 events. 1856/2895 cut-off events. For 14786/14790 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14760 event pairs, 731 based on Foata normal form. 8/2890 useless extension candidates. Maximal degree in co-relation 10850. Up to 2601 conditions per place. [2024-06-21 16:42:01,013 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 63 selfloop transitions, 26 changer transitions 0/95 dead transitions. [2024-06-21 16:42:01,013 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 95 transitions, 693 flow [2024-06-21 16:42:01,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:01,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:01,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 16:42:01,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-21 16:42:01,015 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 363 flow. Second operand 7 states and 150 transitions. [2024-06-21 16:42:01,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 95 transitions, 693 flow [2024-06-21 16:42:01,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 653 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:01,022 INFO L231 Difference]: Finished difference. Result has 69 places, 70 transitions, 442 flow [2024-06-21 16:42:01,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=442, PETRI_PLACES=69, PETRI_TRANSITIONS=70} [2024-06-21 16:42:01,023 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 24 predicate places. [2024-06-21 16:42:01,026 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 70 transitions, 442 flow [2024-06-21 16:42:01,026 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:01,026 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:01,026 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:01,026 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-21 16:42:01,026 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:01,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:01,027 INFO L85 PathProgramCache]: Analyzing trace with hash -1663619872, now seen corresponding path program 2 times [2024-06-21 16:42:01,027 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:01,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011901070] [2024-06-21 16:42:01,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:01,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:01,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:01,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:01,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011901070] [2024-06-21 16:42:01,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011901070] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:01,733 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:01,733 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:01,733 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011453964] [2024-06-21 16:42:01,733 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:01,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:01,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:01,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:01,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:01,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:01,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 70 transitions, 442 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:01,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:01,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:01,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:02,363 INFO L124 PetriNetUnfolderBase]: 1867/2907 cut-off events. [2024-06-21 16:42:02,364 INFO L125 PetriNetUnfolderBase]: For 18378/18378 co-relation queries the response was YES. [2024-06-21 16:42:02,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11745 conditions, 2907 events. 1867/2907 cut-off events. For 18378/18378 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14829 event pairs, 745 based on Foata normal form. 2/2895 useless extension candidates. Maximal degree in co-relation 11718. Up to 2608 conditions per place. [2024-06-21 16:42:02,379 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 60 selfloop transitions, 33 changer transitions 0/99 dead transitions. [2024-06-21 16:42:02,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 99 transitions, 824 flow [2024-06-21 16:42:02,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:02,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:02,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-06-21 16:42:02,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.487012987012987 [2024-06-21 16:42:02,381 INFO L175 Difference]: Start difference. First operand has 69 places, 70 transitions, 442 flow. Second operand 7 states and 150 transitions. [2024-06-21 16:42:02,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 99 transitions, 824 flow [2024-06-21 16:42:02,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 99 transitions, 788 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-21 16:42:02,388 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 542 flow [2024-06-21 16:42:02,388 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=406, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=542, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-06-21 16:42:02,388 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 28 predicate places. [2024-06-21 16:42:02,389 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 542 flow [2024-06-21 16:42:02,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:02,389 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:02,389 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:02,389 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-21 16:42:02,389 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:02,389 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:02,390 INFO L85 PathProgramCache]: Analyzing trace with hash -883462560, now seen corresponding path program 3 times [2024-06-21 16:42:02,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:02,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023764746] [2024-06-21 16:42:02,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:02,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:02,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:03,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:03,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:03,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023764746] [2024-06-21 16:42:03,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1023764746] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:03,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:03,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:03,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390815404] [2024-06-21 16:42:03,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:03,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:03,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:03,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:03,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:03,189 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:03,190 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:03,190 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:03,190 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:03,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:03,730 INFO L124 PetriNetUnfolderBase]: 1862/2900 cut-off events. [2024-06-21 16:42:03,730 INFO L125 PetriNetUnfolderBase]: For 21727/21727 co-relation queries the response was YES. [2024-06-21 16:42:03,736 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12205 conditions, 2900 events. 1862/2900 cut-off events. For 21727/21727 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14784 event pairs, 745 based on Foata normal form. 2/2888 useless extension candidates. Maximal degree in co-relation 12176. Up to 2605 conditions per place. [2024-06-21 16:42:03,746 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 57 selfloop transitions, 34 changer transitions 0/97 dead transitions. [2024-06-21 16:42:03,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 97 transitions, 820 flow [2024-06-21 16:42:03,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:03,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:03,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 16:42:03,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-21 16:42:03,748 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 542 flow. Second operand 7 states and 148 transitions. [2024-06-21 16:42:03,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 97 transitions, 820 flow [2024-06-21 16:42:03,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 97 transitions, 765 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-21 16:42:03,758 INFO L231 Difference]: Finished difference. Result has 78 places, 76 transitions, 563 flow [2024-06-21 16:42:03,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=487, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=563, PETRI_PLACES=78, PETRI_TRANSITIONS=76} [2024-06-21 16:42:03,760 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 33 predicate places. [2024-06-21 16:42:03,760 INFO L495 AbstractCegarLoop]: Abstraction has has 78 places, 76 transitions, 563 flow [2024-06-21 16:42:03,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.375) internal successors, (99), 8 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:03,761 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:03,761 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:03,761 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-21 16:42:03,761 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:03,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:03,761 INFO L85 PathProgramCache]: Analyzing trace with hash -1752323353, now seen corresponding path program 1 times [2024-06-21 16:42:03,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:03,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850514665] [2024-06-21 16:42:03,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:03,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:03,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:04,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:04,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:04,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850514665] [2024-06-21 16:42:04,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850514665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:04,323 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:04,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-21 16:42:04,323 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1230045718] [2024-06-21 16:42:04,323 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:04,323 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-21 16:42:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-21 16:42:04,324 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-21 16:42:04,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:04,378 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 76 transitions, 563 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:04,378 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:04,378 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:04,378 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:04,720 INFO L124 PetriNetUnfolderBase]: 1534/2560 cut-off events. [2024-06-21 16:42:04,721 INFO L125 PetriNetUnfolderBase]: For 20440/20440 co-relation queries the response was YES. [2024-06-21 16:42:04,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10683 conditions, 2560 events. 1534/2560 cut-off events. For 20440/20440 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13956 event pairs, 581 based on Foata normal form. 1/2548 useless extension candidates. Maximal degree in co-relation 10651. Up to 2252 conditions per place. [2024-06-21 16:42:04,732 INFO L140 encePairwiseOnDemand]: 37/44 looper letters, 66 selfloop transitions, 8 changer transitions 0/87 dead transitions. [2024-06-21 16:42:04,732 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 87 transitions, 753 flow [2024-06-21 16:42:04,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-21 16:42:04,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-21 16:42:04,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 106 transitions. [2024-06-21 16:42:04,733 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4818181818181818 [2024-06-21 16:42:04,733 INFO L175 Difference]: Start difference. First operand has 78 places, 76 transitions, 563 flow. Second operand 5 states and 106 transitions. [2024-06-21 16:42:04,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 87 transitions, 753 flow [2024-06-21 16:42:04,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 87 transitions, 665 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:04,742 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 525 flow [2024-06-21 16:42:04,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=525, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-06-21 16:42:04,743 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 31 predicate places. [2024-06-21 16:42:04,743 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 525 flow [2024-06-21 16:42:04,743 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:04,743 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:04,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:04,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-21 16:42:04,744 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:04,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:04,744 INFO L85 PathProgramCache]: Analyzing trace with hash -1641438136, now seen corresponding path program 1 times [2024-06-21 16:42:04,744 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:04,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591343414] [2024-06-21 16:42:04,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:04,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:04,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:05,415 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:05,416 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:05,416 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591343414] [2024-06-21 16:42:05,416 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591343414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:05,416 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:05,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:05,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110091858] [2024-06-21 16:42:05,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:05,416 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:05,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:05,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:05,417 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:05,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:05,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 525 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:05,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:05,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:05,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:06,062 INFO L124 PetriNetUnfolderBase]: 1870/2921 cut-off events. [2024-06-21 16:42:06,062 INFO L125 PetriNetUnfolderBase]: For 27028/27032 co-relation queries the response was YES. [2024-06-21 16:42:06,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12838 conditions, 2921 events. 1870/2921 cut-off events. For 27028/27032 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 14947 event pairs, 730 based on Foata normal form. 6/2927 useless extension candidates. Maximal degree in co-relation 12806. Up to 2613 conditions per place. [2024-06-21 16:42:06,078 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 67 selfloop transitions, 36 changer transitions 0/109 dead transitions. [2024-06-21 16:42:06,078 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 883 flow [2024-06-21 16:42:06,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:06,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:06,079 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 16:42:06,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-21 16:42:06,079 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 525 flow. Second operand 7 states and 153 transitions. [2024-06-21 16:42:06,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 883 flow [2024-06-21 16:42:06,090 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 855 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-21 16:42:06,091 INFO L231 Difference]: Finished difference. Result has 80 places, 82 transitions, 611 flow [2024-06-21 16:42:06,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=497, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=611, PETRI_PLACES=80, PETRI_TRANSITIONS=82} [2024-06-21 16:42:06,092 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 35 predicate places. [2024-06-21 16:42:06,092 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 82 transitions, 611 flow [2024-06-21 16:42:06,092 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:06,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:06,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:06,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-21 16:42:06,093 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:06,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:06,093 INFO L85 PathProgramCache]: Analyzing trace with hash -1641432339, now seen corresponding path program 1 times [2024-06-21 16:42:06,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:06,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492259769] [2024-06-21 16:42:06,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:06,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:06,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:06,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:06,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:06,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492259769] [2024-06-21 16:42:06,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492259769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:06,853 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:06,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:06,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860621892] [2024-06-21 16:42:06,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:06,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:06,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:06,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:06,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:06,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:06,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 82 transitions, 611 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:06,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:06,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:06,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:07,649 INFO L124 PetriNetUnfolderBase]: 1914/2996 cut-off events. [2024-06-21 16:42:07,650 INFO L125 PetriNetUnfolderBase]: For 31282/31286 co-relation queries the response was YES. [2024-06-21 16:42:07,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13498 conditions, 2996 events. 1914/2996 cut-off events. For 31282/31286 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15464 event pairs, 638 based on Foata normal form. 9/3005 useless extension candidates. Maximal degree in co-relation 13465. Up to 2529 conditions per place. [2024-06-21 16:42:07,664 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 77 selfloop transitions, 38 changer transitions 0/121 dead transitions. [2024-06-21 16:42:07,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 121 transitions, 1039 flow [2024-06-21 16:42:07,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:07,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:07,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 16:42:07,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-21 16:42:07,666 INFO L175 Difference]: Start difference. First operand has 80 places, 82 transitions, 611 flow. Second operand 8 states and 174 transitions. [2024-06-21 16:42:07,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 121 transitions, 1039 flow [2024-06-21 16:42:07,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 121 transitions, 928 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:07,682 INFO L231 Difference]: Finished difference. Result has 82 places, 89 transitions, 653 flow [2024-06-21 16:42:07,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=500, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=653, PETRI_PLACES=82, PETRI_TRANSITIONS=89} [2024-06-21 16:42:07,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 37 predicate places. [2024-06-21 16:42:07,683 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 89 transitions, 653 flow [2024-06-21 16:42:07,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:07,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:07,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:07,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-21 16:42:07,684 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:07,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:07,684 INFO L85 PathProgramCache]: Analyzing trace with hash -1949063480, now seen corresponding path program 2 times [2024-06-21 16:42:07,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:07,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [913690347] [2024-06-21 16:42:07,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:07,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:07,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:08,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:08,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:08,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [913690347] [2024-06-21 16:42:08,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [913690347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:08,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:08,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:08,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502862760] [2024-06-21 16:42:08,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:08,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:08,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:08,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:08,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:08,488 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:08,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 89 transitions, 653 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:08,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:08,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:08,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:09,133 INFO L124 PetriNetUnfolderBase]: 1925/3017 cut-off events. [2024-06-21 16:42:09,133 INFO L125 PetriNetUnfolderBase]: For 35490/35492 co-relation queries the response was YES. [2024-06-21 16:42:09,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14355 conditions, 3017 events. 1925/3017 cut-off events. For 35490/35492 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15572 event pairs, 696 based on Foata normal form. 4/3021 useless extension candidates. Maximal degree in co-relation 14322. Up to 2689 conditions per place. [2024-06-21 16:42:09,152 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 74 selfloop transitions, 36 changer transitions 0/116 dead transitions. [2024-06-21 16:42:09,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 116 transitions, 1026 flow [2024-06-21 16:42:09,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:09,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:09,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 149 transitions. [2024-06-21 16:42:09,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4837662337662338 [2024-06-21 16:42:09,156 INFO L175 Difference]: Start difference. First operand has 82 places, 89 transitions, 653 flow. Second operand 7 states and 149 transitions. [2024-06-21 16:42:09,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 116 transitions, 1026 flow [2024-06-21 16:42:09,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 977 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:09,196 INFO L231 Difference]: Finished difference. Result has 85 places, 92 transitions, 720 flow [2024-06-21 16:42:09,197 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=604, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=720, PETRI_PLACES=85, PETRI_TRANSITIONS=92} [2024-06-21 16:42:09,197 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 40 predicate places. [2024-06-21 16:42:09,197 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 92 transitions, 720 flow [2024-06-21 16:42:09,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:09,197 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:09,198 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:09,198 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-21 16:42:09,198 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:09,198 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:09,198 INFO L85 PathProgramCache]: Analyzing trace with hash 2017714575, now seen corresponding path program 2 times [2024-06-21 16:42:09,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:09,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523609193] [2024-06-21 16:42:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:09,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:09,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:09,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:09,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:09,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523609193] [2024-06-21 16:42:09,965 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523609193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:09,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:09,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:09,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324976405] [2024-06-21 16:42:09,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:09,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:09,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:09,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:09,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:10,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:10,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 92 transitions, 720 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:10,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:10,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:10,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:10,786 INFO L124 PetriNetUnfolderBase]: 1947/3032 cut-off events. [2024-06-21 16:42:10,786 INFO L125 PetriNetUnfolderBase]: For 40337/40337 co-relation queries the response was YES. [2024-06-21 16:42:10,793 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14784 conditions, 3032 events. 1947/3032 cut-off events. For 40337/40337 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15499 event pairs, 662 based on Foata normal form. 4/3035 useless extension candidates. Maximal degree in co-relation 14749. Up to 2545 conditions per place. [2024-06-21 16:42:10,802 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 70 selfloop transitions, 52 changer transitions 0/128 dead transitions. [2024-06-21 16:42:10,802 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 128 transitions, 1228 flow [2024-06-21 16:42:10,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:10,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:10,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-21 16:42:10,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943181818181818 [2024-06-21 16:42:10,804 INFO L175 Difference]: Start difference. First operand has 85 places, 92 transitions, 720 flow. Second operand 8 states and 174 transitions. [2024-06-21 16:42:10,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 128 transitions, 1228 flow [2024-06-21 16:42:10,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 128 transitions, 1162 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:10,820 INFO L231 Difference]: Finished difference. Result has 89 places, 98 transitions, 836 flow [2024-06-21 16:42:10,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=654, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=836, PETRI_PLACES=89, PETRI_TRANSITIONS=98} [2024-06-21 16:42:10,820 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 44 predicate places. [2024-06-21 16:42:10,821 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 98 transitions, 836 flow [2024-06-21 16:42:10,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:10,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:10,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:10,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-21 16:42:10,821 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:10,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:10,822 INFO L85 PathProgramCache]: Analyzing trace with hash 830631803, now seen corresponding path program 3 times [2024-06-21 16:42:10,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:10,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991225416] [2024-06-21 16:42:10,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:10,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:10,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:11,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:11,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:11,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991225416] [2024-06-21 16:42:11,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991225416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:11,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:11,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:11,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333320229] [2024-06-21 16:42:11,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:11,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:11,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:11,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:11,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:11,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:11,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 98 transitions, 836 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:11,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:11,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:11,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:12,579 INFO L124 PetriNetUnfolderBase]: 1969/3069 cut-off events. [2024-06-21 16:42:12,580 INFO L125 PetriNetUnfolderBase]: For 45828/45828 co-relation queries the response was YES. [2024-06-21 16:42:12,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15504 conditions, 3069 events. 1969/3069 cut-off events. For 45828/45828 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15763 event pairs, 662 based on Foata normal form. 4/3072 useless extension candidates. Maximal degree in co-relation 15468. Up to 2554 conditions per place. [2024-06-21 16:42:12,596 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 73 selfloop transitions, 53 changer transitions 0/132 dead transitions. [2024-06-21 16:42:12,596 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 132 transitions, 1334 flow [2024-06-21 16:42:12,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:12,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:12,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-21 16:42:12,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4971590909090909 [2024-06-21 16:42:12,598 INFO L175 Difference]: Start difference. First operand has 89 places, 98 transitions, 836 flow. Second operand 8 states and 175 transitions. [2024-06-21 16:42:12,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 132 transitions, 1334 flow [2024-06-21 16:42:12,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 132 transitions, 1240 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:12,625 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 896 flow [2024-06-21 16:42:12,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=748, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=896, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-06-21 16:42:12,626 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 48 predicate places. [2024-06-21 16:42:12,626 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 896 flow [2024-06-21 16:42:12,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:12,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:12,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:12,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-21 16:42:12,627 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:12,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:12,627 INFO L85 PathProgramCache]: Analyzing trace with hash 969406344, now seen corresponding path program 3 times [2024-06-21 16:42:12,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:12,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106606063] [2024-06-21 16:42:12,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:12,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:12,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:13,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:13,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:13,318 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106606063] [2024-06-21 16:42:13,319 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106606063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:13,319 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:13,319 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:13,319 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485669239] [2024-06-21 16:42:13,319 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:13,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:13,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:13,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:13,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:13,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:13,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 896 flow. Second operand has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:13,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:13,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:13,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:13,965 INFO L124 PetriNetUnfolderBase]: 1964/3085 cut-off events. [2024-06-21 16:42:13,965 INFO L125 PetriNetUnfolderBase]: For 49465/49467 co-relation queries the response was YES. [2024-06-21 16:42:13,972 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15615 conditions, 3085 events. 1964/3085 cut-off events. For 49465/49467 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16033 event pairs, 722 based on Foata normal form. 4/3088 useless extension candidates. Maximal degree in co-relation 15577. Up to 2748 conditions per place. [2024-06-21 16:42:13,982 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 80 selfloop transitions, 34 changer transitions 0/120 dead transitions. [2024-06-21 16:42:13,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 120 transitions, 1172 flow [2024-06-21 16:42:13,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:13,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:13,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2024-06-21 16:42:13,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-21 16:42:13,985 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 896 flow. Second operand 7 states and 143 transitions. [2024-06-21 16:42:13,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 120 transitions, 1172 flow [2024-06-21 16:42:14,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 120 transitions, 1060 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:14,013 INFO L231 Difference]: Finished difference. Result has 95 places, 101 transitions, 860 flow [2024-06-21 16:42:14,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=95, PETRI_TRANSITIONS=101} [2024-06-21 16:42:14,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 50 predicate places. [2024-06-21 16:42:14,014 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 101 transitions, 860 flow [2024-06-21 16:42:14,015 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.5) internal successors, (100), 8 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:14,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:14,015 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:14,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-21 16:42:14,015 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:14,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:14,016 INFO L85 PathProgramCache]: Analyzing trace with hash -32607059, now seen corresponding path program 4 times [2024-06-21 16:42:14,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:14,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [728664847] [2024-06-21 16:42:14,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:14,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:14,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:14,769 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:14,769 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:14,769 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [728664847] [2024-06-21 16:42:14,769 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [728664847] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:14,769 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:14,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:14,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396199967] [2024-06-21 16:42:14,770 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:14,770 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:14,770 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:14,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:14,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:14,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:14,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 101 transitions, 860 flow. Second operand has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:14,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:14,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:14,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:15,497 INFO L124 PetriNetUnfolderBase]: 1954/3047 cut-off events. [2024-06-21 16:42:15,497 INFO L125 PetriNetUnfolderBase]: For 53325/53325 co-relation queries the response was YES. [2024-06-21 16:42:15,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15530 conditions, 3047 events. 1954/3047 cut-off events. For 53325/53325 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15661 event pairs, 658 based on Foata normal form. 4/3050 useless extension candidates. Maximal degree in co-relation 15491. Up to 2547 conditions per place. [2024-06-21 16:42:15,515 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 72 selfloop transitions, 52 changer transitions 0/130 dead transitions. [2024-06-21 16:42:15,515 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 130 transitions, 1252 flow [2024-06-21 16:42:15,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:15,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:15,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 16:42:15,516 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-21 16:42:15,516 INFO L175 Difference]: Start difference. First operand has 95 places, 101 transitions, 860 flow. Second operand 8 states and 173 transitions. [2024-06-21 16:42:15,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 130 transitions, 1252 flow [2024-06-21 16:42:15,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 130 transitions, 1139 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:15,544 INFO L231 Difference]: Finished difference. Result has 96 places, 101 transitions, 859 flow [2024-06-21 16:42:15,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=859, PETRI_PLACES=96, PETRI_TRANSITIONS=101} [2024-06-21 16:42:15,544 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 51 predicate places. [2024-06-21 16:42:15,544 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 101 transitions, 859 flow [2024-06-21 16:42:15,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.333333333333334) internal successors, (111), 9 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:15,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:15,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:15,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-21 16:42:15,545 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:15,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:15,545 INFO L85 PathProgramCache]: Analyzing trace with hash 1493783763, now seen corresponding path program 1 times [2024-06-21 16:42:15,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:15,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282481154] [2024-06-21 16:42:15,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:15,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:15,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:16,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:16,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:16,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282481154] [2024-06-21 16:42:16,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282481154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:16,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:16,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:16,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146159193] [2024-06-21 16:42:16,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:16,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:16,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:16,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:16,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:16,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:16,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 101 transitions, 859 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:16,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:16,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:16,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:16,681 INFO L124 PetriNetUnfolderBase]: 1845/2972 cut-off events. [2024-06-21 16:42:16,681 INFO L125 PetriNetUnfolderBase]: For 56981/56981 co-relation queries the response was YES. [2024-06-21 16:42:16,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15391 conditions, 2972 events. 1845/2972 cut-off events. For 56981/56981 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 15843 event pairs, 649 based on Foata normal form. 1/2973 useless extension candidates. Maximal degree in co-relation 15351. Up to 2703 conditions per place. [2024-06-21 16:42:16,699 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 88 selfloop transitions, 11 changer transitions 0/113 dead transitions. [2024-06-21 16:42:16,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 113 transitions, 1105 flow [2024-06-21 16:42:16,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:16,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:16,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 118 transitions. [2024-06-21 16:42:16,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 16:42:16,701 INFO L175 Difference]: Start difference. First operand has 96 places, 101 transitions, 859 flow. Second operand 6 states and 118 transitions. [2024-06-21 16:42:16,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 113 transitions, 1105 flow [2024-06-21 16:42:16,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 113 transitions, 962 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:16,723 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 776 flow [2024-06-21 16:42:16,724 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=716, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=776, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-21 16:42:16,724 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 49 predicate places. [2024-06-21 16:42:16,724 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 776 flow [2024-06-21 16:42:16,724 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:16,724 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:16,724 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:16,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-21 16:42:16,725 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:16,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:16,725 INFO L85 PathProgramCache]: Analyzing trace with hash -296189015, now seen corresponding path program 1 times [2024-06-21 16:42:16,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:16,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218552364] [2024-06-21 16:42:16,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:16,725 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:17,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:17,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:17,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218552364] [2024-06-21 16:42:17,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218552364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:17,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:17,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:17,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336475806] [2024-06-21 16:42:17,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:17,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:17,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:17,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:17,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:17,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:17,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 776 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:17,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:17,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:17,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:17,927 INFO L124 PetriNetUnfolderBase]: 1934/3071 cut-off events. [2024-06-21 16:42:17,927 INFO L125 PetriNetUnfolderBase]: For 71312/71314 co-relation queries the response was YES. [2024-06-21 16:42:17,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16849 conditions, 3071 events. 1934/3071 cut-off events. For 71312/71314 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16354 event pairs, 486 based on Foata normal form. 6/3077 useless extension candidates. Maximal degree in co-relation 16808. Up to 2634 conditions per place. [2024-06-21 16:42:17,942 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 96 selfloop transitions, 23 changer transitions 0/134 dead transitions. [2024-06-21 16:42:17,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1206 flow [2024-06-21 16:42:17,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:17,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:17,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 153 transitions. [2024-06-21 16:42:17,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4967532467532468 [2024-06-21 16:42:17,944 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 776 flow. Second operand 7 states and 153 transitions. [2024-06-21 16:42:17,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1206 flow [2024-06-21 16:42:17,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1168 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:17,967 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 843 flow [2024-06-21 16:42:17,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=738, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=843, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-21 16:42:17,967 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 52 predicate places. [2024-06-21 16:42:17,967 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 843 flow [2024-06-21 16:42:17,967 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:17,967 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:17,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:17,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-21 16:42:17,968 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:17,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:17,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1666993243, now seen corresponding path program 2 times [2024-06-21 16:42:17,968 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:17,968 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277636928] [2024-06-21 16:42:17,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:17,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:17,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:18,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:18,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:18,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277636928] [2024-06-21 16:42:18,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277636928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:18,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:18,650 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:18,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679351508] [2024-06-21 16:42:18,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:18,652 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:18,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:18,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:18,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:18,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:18,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 843 flow. Second operand has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:18,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:18,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:18,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:19,376 INFO L124 PetriNetUnfolderBase]: 1922/3050 cut-off events. [2024-06-21 16:42:19,377 INFO L125 PetriNetUnfolderBase]: For 77303/77305 co-relation queries the response was YES. [2024-06-21 16:42:19,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17221 conditions, 3050 events. 1922/3050 cut-off events. For 77303/77305 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16154 event pairs, 640 based on Foata normal form. 6/3056 useless extension candidates. Maximal degree in co-relation 17179. Up to 2695 conditions per place. [2024-06-21 16:42:19,396 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 95 selfloop transitions, 21 changer transitions 0/131 dead transitions. [2024-06-21 16:42:19,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1133 flow [2024-06-21 16:42:19,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:19,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:19,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-21 16:42:19,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902597402597403 [2024-06-21 16:42:19,398 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 843 flow. Second operand 7 states and 151 transitions. [2024-06-21 16:42:19,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1133 flow [2024-06-21 16:42:19,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 131 transitions, 1078 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-21 16:42:19,443 INFO L231 Difference]: Finished difference. Result has 101 places, 108 transitions, 837 flow [2024-06-21 16:42:19,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=788, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=837, PETRI_PLACES=101, PETRI_TRANSITIONS=108} [2024-06-21 16:42:19,444 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 56 predicate places. [2024-06-21 16:42:19,444 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 108 transitions, 837 flow [2024-06-21 16:42:19,444 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.5) internal successors, (108), 8 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:19,444 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:19,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:19,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-21 16:42:19,445 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:19,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:19,445 INFO L85 PathProgramCache]: Analyzing trace with hash -1551697113, now seen corresponding path program 1 times [2024-06-21 16:42:19,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:19,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488720641] [2024-06-21 16:42:19,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:19,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:20,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:20,140 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:20,140 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488720641] [2024-06-21 16:42:20,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488720641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:20,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:20,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:20,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607697425] [2024-06-21 16:42:20,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:20,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:20,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:20,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:20,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:20,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:20,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 108 transitions, 837 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) [2024-06-21 16:42:20,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:20,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:20,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:20,912 INFO L124 PetriNetUnfolderBase]: 2053/3201 cut-off events. [2024-06-21 16:42:20,912 INFO L125 PetriNetUnfolderBase]: For 84058/84060 co-relation queries the response was YES. [2024-06-21 16:42:20,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18133 conditions, 3201 events. 2053/3201 cut-off events. For 84058/84060 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 16648 event pairs, 626 based on Foata normal form. 4/3205 useless extension candidates. Maximal degree in co-relation 18089. Up to 2649 conditions per place. [2024-06-21 16:42:20,935 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 84 selfloop transitions, 55 changer transitions 0/146 dead transitions. [2024-06-21 16:42:20,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 146 transitions, 1327 flow [2024-06-21 16:42:20,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:20,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:20,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-06-21 16:42:20,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5056818181818182 [2024-06-21 16:42:20,937 INFO L175 Difference]: Start difference. First operand has 101 places, 108 transitions, 837 flow. Second operand 8 states and 178 transitions. [2024-06-21 16:42:20,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 146 transitions, 1327 flow [2024-06-21 16:42:20,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 146 transitions, 1277 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:20,991 INFO L231 Difference]: Finished difference. Result has 103 places, 111 transitions, 943 flow [2024-06-21 16:42:20,991 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=787, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=943, PETRI_PLACES=103, PETRI_TRANSITIONS=111} [2024-06-21 16:42:20,992 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 58 predicate places. [2024-06-21 16:42:20,992 INFO L495 AbstractCegarLoop]: Abstraction has has 103 places, 111 transitions, 943 flow [2024-06-21 16:42:20,992 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) [2024-06-21 16:42:20,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:20,992 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:20,992 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-21 16:42:20,992 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:20,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:20,993 INFO L85 PathProgramCache]: Analyzing trace with hash -1551517623, now seen corresponding path program 2 times [2024-06-21 16:42:20,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:20,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971831684] [2024-06-21 16:42:20,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:20,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:21,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:21,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:21,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:21,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971831684] [2024-06-21 16:42:21,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971831684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:21,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:21,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:21,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665800857] [2024-06-21 16:42:21,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:21,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:21,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:21,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:21,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:21,918 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:21,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 111 transitions, 943 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) [2024-06-21 16:42:21,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:21,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:21,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:22,872 INFO L124 PetriNetUnfolderBase]: 2107/3294 cut-off events. [2024-06-21 16:42:22,872 INFO L125 PetriNetUnfolderBase]: For 92778/92780 co-relation queries the response was YES. [2024-06-21 16:42:22,882 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19139 conditions, 3294 events. 2107/3294 cut-off events. For 92778/92780 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17249 event pairs, 628 based on Foata normal form. 4/3298 useless extension candidates. Maximal degree in co-relation 19094. Up to 2695 conditions per place. [2024-06-21 16:42:22,895 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 57 changer transitions 0/151 dead transitions. [2024-06-21 16:42:22,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 151 transitions, 1585 flow [2024-06-21 16:42:22,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:22,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:22,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 16:42:22,897 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:42:22,897 INFO L175 Difference]: Start difference. First operand has 103 places, 111 transitions, 943 flow. Second operand 8 states and 176 transitions. [2024-06-21 16:42:22,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 151 transitions, 1585 flow [2024-06-21 16:42:22,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 151 transitions, 1400 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:22,940 INFO L231 Difference]: Finished difference. Result has 104 places, 117 transitions, 969 flow [2024-06-21 16:42:22,941 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=969, PETRI_PLACES=104, PETRI_TRANSITIONS=117} [2024-06-21 16:42:22,941 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 59 predicate places. [2024-06-21 16:42:22,941 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 117 transitions, 969 flow [2024-06-21 16:42:22,941 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) [2024-06-21 16:42:22,941 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:22,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:22,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-21 16:42:22,942 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:22,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:22,942 INFO L85 PathProgramCache]: Analyzing trace with hash 655199737, now seen corresponding path program 3 times [2024-06-21 16:42:22,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:22,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006069698] [2024-06-21 16:42:22,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:22,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:23,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:23,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:23,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006069698] [2024-06-21 16:42:23,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006069698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:23,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:23,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:23,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177572243] [2024-06-21 16:42:23,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:23,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:23,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:23,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:23,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:23,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:23,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 117 transitions, 969 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) [2024-06-21 16:42:23,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:23,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:23,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:24,497 INFO L124 PetriNetUnfolderBase]: 2097/3280 cut-off events. [2024-06-21 16:42:24,497 INFO L125 PetriNetUnfolderBase]: For 97813/97815 co-relation queries the response was YES. [2024-06-21 16:42:24,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19158 conditions, 3280 events. 2097/3280 cut-off events. For 97813/97815 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17175 event pairs, 633 based on Foata normal form. 4/3284 useless extension candidates. Maximal degree in co-relation 19113. Up to 2687 conditions per place. [2024-06-21 16:42:24,522 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 87 selfloop transitions, 56 changer transitions 0/150 dead transitions. [2024-06-21 16:42:24,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 150 transitions, 1431 flow [2024-06-21 16:42:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:24,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:24,524 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-21 16:42:24,524 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:42:24,524 INFO L175 Difference]: Start difference. First operand has 104 places, 117 transitions, 969 flow. Second operand 8 states and 176 transitions. [2024-06-21 16:42:24,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 150 transitions, 1431 flow [2024-06-21 16:42:24,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 107 places, 150 transitions, 1322 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:24,570 INFO L231 Difference]: Finished difference. Result has 108 places, 117 transitions, 980 flow [2024-06-21 16:42:24,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=860, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=980, PETRI_PLACES=108, PETRI_TRANSITIONS=117} [2024-06-21 16:42:24,570 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 63 predicate places. [2024-06-21 16:42:24,570 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 117 transitions, 980 flow [2024-06-21 16:42:24,570 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) [2024-06-21 16:42:24,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:24,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:24,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-21 16:42:24,571 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:24,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:24,571 INFO L85 PathProgramCache]: Analyzing trace with hash -950690736, now seen corresponding path program 1 times [2024-06-21 16:42:24,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:24,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016256283] [2024-06-21 16:42:24,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:24,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:24,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:25,331 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:25,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:25,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016256283] [2024-06-21 16:42:25,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016256283] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:25,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:25,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:25,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809733089] [2024-06-21 16:42:25,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:25,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:25,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:25,334 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:25,334 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:25,420 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:25,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 117 transitions, 980 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:25,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:25,421 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:25,421 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:25,827 INFO L124 PetriNetUnfolderBase]: 2018/3202 cut-off events. [2024-06-21 16:42:25,827 INFO L125 PetriNetUnfolderBase]: For 103698/103698 co-relation queries the response was YES. [2024-06-21 16:42:25,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19109 conditions, 3202 events. 2018/3202 cut-off events. For 103698/103698 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 17088 event pairs, 650 based on Foata normal form. 1/3203 useless extension candidates. Maximal degree in co-relation 19063. Up to 2897 conditions per place. [2024-06-21 16:42:25,851 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 109 selfloop transitions, 11 changer transitions 0/135 dead transitions. [2024-06-21 16:42:25,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 135 transitions, 1286 flow [2024-06-21 16:42:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:25,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:25,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 124 transitions. [2024-06-21 16:42:25,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-21 16:42:25,853 INFO L175 Difference]: Start difference. First operand has 108 places, 117 transitions, 980 flow. Second operand 6 states and 124 transitions. [2024-06-21 16:42:25,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 135 transitions, 1286 flow [2024-06-21 16:42:25,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 135 transitions, 1161 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:25,903 INFO L231 Difference]: Finished difference. Result has 107 places, 120 transitions, 917 flow [2024-06-21 16:42:25,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=106, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=917, PETRI_PLACES=107, PETRI_TRANSITIONS=120} [2024-06-21 16:42:25,903 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 62 predicate places. [2024-06-21 16:42:25,903 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 120 transitions, 917 flow [2024-06-21 16:42:25,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:25,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:25,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:25,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-21 16:42:25,904 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:25,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:25,904 INFO L85 PathProgramCache]: Analyzing trace with hash 1404323913, now seen corresponding path program 4 times [2024-06-21 16:42:25,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:25,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146804044] [2024-06-21 16:42:25,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:25,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:25,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:26,610 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:26,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:26,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146804044] [2024-06-21 16:42:26,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146804044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:26,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:26,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:26,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098838918] [2024-06-21 16:42:26,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:26,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:26,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:26,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:26,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:26,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:26,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 120 transitions, 917 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) [2024-06-21 16:42:26,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:26,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:26,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:27,421 INFO L124 PetriNetUnfolderBase]: 2150/3356 cut-off events. [2024-06-21 16:42:27,422 INFO L125 PetriNetUnfolderBase]: For 111581/111583 co-relation queries the response was YES. [2024-06-21 16:42:27,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20063 conditions, 3356 events. 2150/3356 cut-off events. For 111581/111583 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 17584 event pairs, 657 based on Foata normal form. 6/3361 useless extension candidates. Maximal degree in co-relation 20016. Up to 2739 conditions per place. [2024-06-21 16:42:27,447 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 84 selfloop transitions, 60 changer transitions 0/151 dead transitions. [2024-06-21 16:42:27,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 151 transitions, 1413 flow [2024-06-21 16:42:27,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:27,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:42:27,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:42:27,448 INFO L175 Difference]: Start difference. First operand has 107 places, 120 transitions, 917 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:42:27,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 151 transitions, 1413 flow [2024-06-21 16:42:27,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 151 transitions, 1373 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:27,503 INFO L231 Difference]: Finished difference. Result has 111 places, 123 transitions, 1043 flow [2024-06-21 16:42:27,503 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=877, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1043, PETRI_PLACES=111, PETRI_TRANSITIONS=123} [2024-06-21 16:42:27,505 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 66 predicate places. [2024-06-21 16:42:27,505 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 123 transitions, 1043 flow [2024-06-21 16:42:27,505 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) [2024-06-21 16:42:27,505 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:27,505 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:27,505 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-21 16:42:27,506 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:27,506 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:27,506 INFO L85 PathProgramCache]: Analyzing trace with hash -782916475, now seen corresponding path program 5 times [2024-06-21 16:42:27,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:27,506 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196207503] [2024-06-21 16:42:27,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:27,507 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:28,212 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:28,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:28,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196207503] [2024-06-21 16:42:28,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196207503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:28,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:28,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:28,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [733730804] [2024-06-21 16:42:28,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:28,213 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:28,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:28,214 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:28,214 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:28,355 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:28,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 123 transitions, 1043 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) [2024-06-21 16:42:28,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:28,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:28,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:29,086 INFO L124 PetriNetUnfolderBase]: 2172/3393 cut-off events. [2024-06-21 16:42:29,086 INFO L125 PetriNetUnfolderBase]: For 120225/120227 co-relation queries the response was YES. [2024-06-21 16:42:29,100 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20811 conditions, 3393 events. 2172/3393 cut-off events. For 120225/120227 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17867 event pairs, 652 based on Foata normal form. 6/3398 useless extension candidates. Maximal degree in co-relation 20763. Up to 2758 conditions per place. [2024-06-21 16:42:29,168 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 89 selfloop transitions, 59 changer transitions 0/155 dead transitions. [2024-06-21 16:42:29,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 155 transitions, 1559 flow [2024-06-21 16:42:29,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:29,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:29,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 16:42:29,170 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-21 16:42:29,170 INFO L175 Difference]: Start difference. First operand has 111 places, 123 transitions, 1043 flow. Second operand 8 states and 171 transitions. [2024-06-21 16:42:29,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 155 transitions, 1559 flow [2024-06-21 16:42:29,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 155 transitions, 1433 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:29,231 INFO L231 Difference]: Finished difference. Result has 114 places, 126 transitions, 1087 flow [2024-06-21 16:42:29,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=928, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1087, PETRI_PLACES=114, PETRI_TRANSITIONS=126} [2024-06-21 16:42:29,232 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 69 predicate places. [2024-06-21 16:42:29,232 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 126 transitions, 1087 flow [2024-06-21 16:42:29,232 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) [2024-06-21 16:42:29,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:29,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:29,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-21 16:42:29,233 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:29,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:29,233 INFO L85 PathProgramCache]: Analyzing trace with hash -782922985, now seen corresponding path program 6 times [2024-06-21 16:42:29,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:29,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240363694] [2024-06-21 16:42:29,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:29,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:29,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:30,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:30,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:30,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240363694] [2024-06-21 16:42:30,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240363694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:30,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:30,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:30,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117887203] [2024-06-21 16:42:30,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:30,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:30,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:30,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:30,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:30,129 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:30,129 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 126 transitions, 1087 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) [2024-06-21 16:42:30,129 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:30,129 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:30,129 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:30,882 INFO L124 PetriNetUnfolderBase]: 2162/3379 cut-off events. [2024-06-21 16:42:30,882 INFO L125 PetriNetUnfolderBase]: For 126609/126611 co-relation queries the response was YES. [2024-06-21 16:42:30,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20840 conditions, 3379 events. 2162/3379 cut-off events. For 126609/126611 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17707 event pairs, 650 based on Foata normal form. 6/3384 useless extension candidates. Maximal degree in co-relation 20791. Up to 2750 conditions per place. [2024-06-21 16:42:30,906 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 86 selfloop transitions, 60 changer transitions 0/153 dead transitions. [2024-06-21 16:42:30,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 153 transitions, 1445 flow [2024-06-21 16:42:30,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:30,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:30,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:42:30,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:42:30,908 INFO L175 Difference]: Start difference. First operand has 114 places, 126 transitions, 1087 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:42:30,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 153 transitions, 1445 flow [2024-06-21 16:42:30,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 153 transitions, 1254 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:30,967 INFO L231 Difference]: Finished difference. Result has 115 places, 126 transitions, 1024 flow [2024-06-21 16:42:30,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=896, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1024, PETRI_PLACES=115, PETRI_TRANSITIONS=126} [2024-06-21 16:42:30,967 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 16:42:30,968 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 126 transitions, 1024 flow [2024-06-21 16:42:30,968 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) [2024-06-21 16:42:30,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:30,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:30,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-21 16:42:30,968 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:30,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:30,969 INFO L85 PathProgramCache]: Analyzing trace with hash -937358256, now seen corresponding path program 2 times [2024-06-21 16:42:30,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:30,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345875676] [2024-06-21 16:42:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:30,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:31,583 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:31,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:31,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345875676] [2024-06-21 16:42:31,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345875676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:31,584 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:31,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:31,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159789765] [2024-06-21 16:42:31,584 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:31,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:31,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:31,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:31,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:31,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:31,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 126 transitions, 1024 flow. Second operand has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:31,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:31,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:31,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:32,137 INFO L124 PetriNetUnfolderBase]: 2045/3261 cut-off events. [2024-06-21 16:42:32,137 INFO L125 PetriNetUnfolderBase]: For 131999/132005 co-relation queries the response was YES. [2024-06-21 16:42:32,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20531 conditions, 3261 events. 2045/3261 cut-off events. For 131999/132005 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17516 event pairs, 660 based on Foata normal form. 7/3268 useless extension candidates. Maximal degree in co-relation 20481. Up to 2933 conditions per place. [2024-06-21 16:42:32,161 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 107 selfloop transitions, 16 changer transitions 0/138 dead transitions. [2024-06-21 16:42:32,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 138 transitions, 1326 flow [2024-06-21 16:42:32,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:32,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:32,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 120 transitions. [2024-06-21 16:42:32,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:42:32,162 INFO L175 Difference]: Start difference. First operand has 115 places, 126 transitions, 1024 flow. Second operand 6 states and 120 transitions. [2024-06-21 16:42:32,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 138 transitions, 1326 flow [2024-06-21 16:42:32,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 138 transitions, 1169 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:42:32,218 INFO L231 Difference]: Finished difference. Result has 113 places, 129 transitions, 945 flow [2024-06-21 16:42:32,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=867, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=945, PETRI_PLACES=113, PETRI_TRANSITIONS=129} [2024-06-21 16:42:32,218 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 68 predicate places. [2024-06-21 16:42:32,218 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 129 transitions, 945 flow [2024-06-21 16:42:32,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.857142857142858) internal successors, (97), 7 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:32,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:32,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:32,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-21 16:42:32,219 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:32,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:32,219 INFO L85 PathProgramCache]: Analyzing trace with hash -944970864, now seen corresponding path program 1 times [2024-06-21 16:42:32,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:32,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872237308] [2024-06-21 16:42:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:32,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:32,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:32,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:32,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:32,866 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872237308] [2024-06-21 16:42:32,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872237308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:32,866 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:32,866 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:32,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978483613] [2024-06-21 16:42:32,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:32,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:32,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:32,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:32,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:32,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:32,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 129 transitions, 945 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:32,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:32,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:32,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:33,449 INFO L124 PetriNetUnfolderBase]: 1821/3018 cut-off events. [2024-06-21 16:42:33,449 INFO L125 PetriNetUnfolderBase]: For 120404/120404 co-relation queries the response was YES. [2024-06-21 16:42:33,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18636 conditions, 3018 events. 1821/3018 cut-off events. For 120404/120404 co-relation queries the response was YES. Maximal size of possible extension queue 126. Compared 16799 event pairs, 560 based on Foata normal form. 1/3019 useless extension candidates. Maximal degree in co-relation 18585. Up to 2618 conditions per place. [2024-06-21 16:42:33,471 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 117 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-06-21 16:42:33,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 144 transitions, 1261 flow [2024-06-21 16:42:33,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:33,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:33,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2024-06-21 16:42:33,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:42:33,472 INFO L175 Difference]: Start difference. First operand has 113 places, 129 transitions, 945 flow. Second operand 6 states and 126 transitions. [2024-06-21 16:42:33,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 144 transitions, 1261 flow [2024-06-21 16:42:33,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 144 transitions, 1205 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:33,518 INFO L231 Difference]: Finished difference. Result has 115 places, 132 transitions, 953 flow [2024-06-21 16:42:33,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=889, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=953, PETRI_PLACES=115, PETRI_TRANSITIONS=132} [2024-06-21 16:42:33,519 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 70 predicate places. [2024-06-21 16:42:33,519 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 132 transitions, 953 flow [2024-06-21 16:42:33,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:33,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:33,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:33,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-21 16:42:33,519 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)] === [2024-06-21 16:42:33,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:33,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1404631743, now seen corresponding path program 1 times [2024-06-21 16:42:33,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:33,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [19331462] [2024-06-21 16:42:33,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:33,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:33,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:34,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:34,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:34,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [19331462] [2024-06-21 16:42:34,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [19331462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:34,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:34,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:42:34,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314500856] [2024-06-21 16:42:34,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:34,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:42:34,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:34,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:42:34,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:42:34,857 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:34,857 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 132 transitions, 953 flow. Second operand has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:34,857 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:34,857 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:34,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:35,569 INFO L124 PetriNetUnfolderBase]: 1913/3104 cut-off events. [2024-06-21 16:42:35,569 INFO L125 PetriNetUnfolderBase]: For 126859/126859 co-relation queries the response was YES. [2024-06-21 16:42:35,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19362 conditions, 3104 events. 1913/3104 cut-off events. For 126859/126859 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16839 event pairs, 549 based on Foata normal form. 4/3108 useless extension candidates. Maximal degree in co-relation 19310. Up to 2742 conditions per place. [2024-06-21 16:42:35,591 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 138 selfloop transitions, 19 changer transitions 0/165 dead transitions. [2024-06-21 16:42:35,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 165 transitions, 1387 flow [2024-06-21 16:42:35,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:42:35,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:42:35,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 182 transitions. [2024-06-21 16:42:35,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4595959595959596 [2024-06-21 16:42:35,592 INFO L175 Difference]: Start difference. First operand has 115 places, 132 transitions, 953 flow. Second operand 9 states and 182 transitions. [2024-06-21 16:42:35,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 165 transitions, 1387 flow [2024-06-21 16:42:35,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 165 transitions, 1345 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:35,642 INFO L231 Difference]: Finished difference. Result has 121 places, 137 transitions, 1016 flow [2024-06-21 16:42:35,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=911, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1016, PETRI_PLACES=121, PETRI_TRANSITIONS=137} [2024-06-21 16:42:35,643 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-21 16:42:35,643 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 137 transitions, 1016 flow [2024-06-21 16:42:35,643 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.3) internal successors, (133), 10 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:35,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:35,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:35,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-21 16:42:35,644 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:35,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:35,644 INFO L85 PathProgramCache]: Analyzing trace with hash -355534074, now seen corresponding path program 2 times [2024-06-21 16:42:35,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:35,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796514590] [2024-06-21 16:42:35,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:35,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:35,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:36,346 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:36,347 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:36,347 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796514590] [2024-06-21 16:42:36,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796514590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:36,347 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:36,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-21 16:42:36,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658623721] [2024-06-21 16:42:36,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:36,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-21 16:42:36,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:36,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-21 16:42:36,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-21 16:42:36,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 44 [2024-06-21 16:42:36,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 137 transitions, 1016 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:36,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:36,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 44 [2024-06-21 16:42:36,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:36,835 INFO L124 PetriNetUnfolderBase]: 1811/3002 cut-off events. [2024-06-21 16:42:36,836 INFO L125 PetriNetUnfolderBase]: For 133283/133285 co-relation queries the response was YES. [2024-06-21 16:42:36,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19496 conditions, 3002 events. 1811/3002 cut-off events. For 133283/133285 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16671 event pairs, 540 based on Foata normal form. 3/3005 useless extension candidates. Maximal degree in co-relation 19442. Up to 2597 conditions per place. [2024-06-21 16:42:36,857 INFO L140 encePairwiseOnDemand]: 36/44 looper letters, 117 selfloop transitions, 16 changer transitions 0/149 dead transitions. [2024-06-21 16:42:36,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 149 transitions, 1342 flow [2024-06-21 16:42:36,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-21 16:42:36,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-21 16:42:36,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 125 transitions. [2024-06-21 16:42:36,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4734848484848485 [2024-06-21 16:42:36,859 INFO L175 Difference]: Start difference. First operand has 121 places, 137 transitions, 1016 flow. Second operand 6 states and 125 transitions. [2024-06-21 16:42:36,859 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 149 transitions, 1342 flow [2024-06-21 16:42:36,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 149 transitions, 1277 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:36,913 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1033 flow [2024-06-21 16:42:36,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=951, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1033, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-21 16:42:36,913 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 76 predicate places. [2024-06-21 16:42:36,914 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1033 flow [2024-06-21 16:42:36,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:36,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:36,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:36,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-21 16:42:36,914 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:36,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:36,914 INFO L85 PathProgramCache]: Analyzing trace with hash -355524154, now seen corresponding path program 1 times [2024-06-21 16:42:36,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:36,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968852156] [2024-06-21 16:42:36,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:36,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:36,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:37,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:37,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:37,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968852156] [2024-06-21 16:42:37,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968852156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:37,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:37,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:37,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846557611] [2024-06-21 16:42:37,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:37,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:37,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:37,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:37,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:37,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:37,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1033 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:37,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:37,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:37,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:38,251 INFO L124 PetriNetUnfolderBase]: 1942/3131 cut-off events. [2024-06-21 16:42:38,251 INFO L125 PetriNetUnfolderBase]: For 139394/139394 co-relation queries the response was YES. [2024-06-21 16:42:38,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20422 conditions, 3131 events. 1942/3131 cut-off events. For 139394/139394 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 16850 event pairs, 584 based on Foata normal form. 1/3132 useless extension candidates. Maximal degree in co-relation 20367. Up to 2840 conditions per place. [2024-06-21 16:42:38,275 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 125 selfloop transitions, 14 changer transitions 0/153 dead transitions. [2024-06-21 16:42:38,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 153 transitions, 1375 flow [2024-06-21 16:42:38,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:38,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:38,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:42:38,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 16:42:38,276 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1033 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:42:38,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 153 transitions, 1375 flow [2024-06-21 16:42:38,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 153 transitions, 1315 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:38,329 INFO L231 Difference]: Finished difference. Result has 124 places, 143 transitions, 1053 flow [2024-06-21 16:42:38,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=973, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=124, PETRI_TRANSITIONS=143} [2024-06-21 16:42:38,329 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 79 predicate places. [2024-06-21 16:42:38,329 INFO L495 AbstractCegarLoop]: Abstraction has has 124 places, 143 transitions, 1053 flow [2024-06-21 16:42:38,330 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:38,330 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:38,330 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:38,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-21 16:42:38,330 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:38,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:38,330 INFO L85 PathProgramCache]: Analyzing trace with hash -536784117, now seen corresponding path program 1 times [2024-06-21 16:42:38,331 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:38,331 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490914977] [2024-06-21 16:42:38,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:38,331 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:38,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:39,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:39,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:39,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490914977] [2024-06-21 16:42:39,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490914977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:39,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:39,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:39,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92612523] [2024-06-21 16:42:39,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:39,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:39,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:39,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:39,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:39,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:39,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 124 places, 143 transitions, 1053 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) [2024-06-21 16:42:39,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:39,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:39,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:39,684 INFO L124 PetriNetUnfolderBase]: 2168/3389 cut-off events. [2024-06-21 16:42:39,685 INFO L125 PetriNetUnfolderBase]: For 172869/172871 co-relation queries the response was YES. [2024-06-21 16:42:39,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23302 conditions, 3389 events. 2168/3389 cut-off events. For 172869/172871 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 17638 event pairs, 458 based on Foata normal form. 6/3395 useless extension candidates. Maximal degree in co-relation 23246. Up to 2835 conditions per place. [2024-06-21 16:42:39,710 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 131 selfloop transitions, 40 changer transitions 0/178 dead transitions. [2024-06-21 16:42:39,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 178 transitions, 1653 flow [2024-06-21 16:42:39,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:39,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:39,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:42:39,712 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:42:39,712 INFO L175 Difference]: Start difference. First operand has 124 places, 143 transitions, 1053 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:42:39,712 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 178 transitions, 1653 flow [2024-06-21 16:42:39,776 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 178 transitions, 1595 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:39,778 INFO L231 Difference]: Finished difference. Result has 127 places, 147 transitions, 1142 flow [2024-06-21 16:42:39,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=995, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1142, PETRI_PLACES=127, PETRI_TRANSITIONS=147} [2024-06-21 16:42:39,779 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 82 predicate places. [2024-06-21 16:42:39,779 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 147 transitions, 1142 flow [2024-06-21 16:42:39,779 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) [2024-06-21 16:42:39,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:39,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:39,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-21 16:42:39,779 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:39,780 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:39,780 INFO L85 PathProgramCache]: Analyzing trace with hash -534906447, now seen corresponding path program 2 times [2024-06-21 16:42:39,780 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:39,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282713738] [2024-06-21 16:42:39,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:39,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:39,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:40,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:40,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:40,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282713738] [2024-06-21 16:42:40,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1282713738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:40,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:40,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:40,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348881209] [2024-06-21 16:42:40,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:40,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:40,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:40,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:40,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:40,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:40,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 147 transitions, 1142 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) [2024-06-21 16:42:40,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:40,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:40,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:41,140 INFO L124 PetriNetUnfolderBase]: 2185/3416 cut-off events. [2024-06-21 16:42:41,141 INFO L125 PetriNetUnfolderBase]: For 182665/182667 co-relation queries the response was YES. [2024-06-21 16:42:41,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23942 conditions, 3416 events. 2185/3416 cut-off events. For 182665/182667 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17839 event pairs, 630 based on Foata normal form. 6/3422 useless extension candidates. Maximal degree in co-relation 23885. Up to 3015 conditions per place. [2024-06-21 16:42:41,166 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 38 changer transitions 0/176 dead transitions. [2024-06-21 16:42:41,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1580 flow [2024-06-21 16:42:41,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:41,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:41,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 166 transitions. [2024-06-21 16:42:41,168 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715909090909091 [2024-06-21 16:42:41,168 INFO L175 Difference]: Start difference. First operand has 127 places, 147 transitions, 1142 flow. Second operand 8 states and 166 transitions. [2024-06-21 16:42:41,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1580 flow [2024-06-21 16:42:41,236 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 176 transitions, 1502 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:41,238 INFO L231 Difference]: Finished difference. Result has 131 places, 149 transitions, 1183 flow [2024-06-21 16:42:41,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1072, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=109, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1183, PETRI_PLACES=131, PETRI_TRANSITIONS=149} [2024-06-21 16:42:41,238 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 86 predicate places. [2024-06-21 16:42:41,238 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 149 transitions, 1183 flow [2024-06-21 16:42:41,238 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) [2024-06-21 16:42:41,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:41,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:41,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-21 16:42:41,239 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:41,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:41,239 INFO L85 PathProgramCache]: Analyzing trace with hash -137181591, now seen corresponding path program 3 times [2024-06-21 16:42:41,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:41,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080815073] [2024-06-21 16:42:41,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:41,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:41,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:41,941 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:41,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:41,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080815073] [2024-06-21 16:42:41,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080815073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:41,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:41,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:41,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449692114] [2024-06-21 16:42:41,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:41,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:41,944 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:42,035 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:42,035 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 149 transitions, 1183 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) [2024-06-21 16:42:42,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:42,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:42,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:42,622 INFO L124 PetriNetUnfolderBase]: 2202/3443 cut-off events. [2024-06-21 16:42:42,623 INFO L125 PetriNetUnfolderBase]: For 192564/192566 co-relation queries the response was YES. [2024-06-21 16:42:42,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24399 conditions, 3443 events. 2202/3443 cut-off events. For 192564/192566 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17967 event pairs, 630 based on Foata normal form. 6/3449 useless extension candidates. Maximal degree in co-relation 24340. Up to 3001 conditions per place. [2024-06-21 16:42:42,647 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 131 selfloop transitions, 41 changer transitions 0/179 dead transitions. [2024-06-21 16:42:42,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 179 transitions, 1625 flow [2024-06-21 16:42:42,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:42,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:42,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-21 16:42:42,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4744318181818182 [2024-06-21 16:42:42,649 INFO L175 Difference]: Start difference. First operand has 131 places, 149 transitions, 1183 flow. Second operand 8 states and 167 transitions. [2024-06-21 16:42:42,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 179 transitions, 1625 flow [2024-06-21 16:42:42,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 179 transitions, 1536 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:42,712 INFO L231 Difference]: Finished difference. Result has 133 places, 151 transitions, 1215 flow [2024-06-21 16:42:42,712 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1094, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1215, PETRI_PLACES=133, PETRI_TRANSITIONS=151} [2024-06-21 16:42:42,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 88 predicate places. [2024-06-21 16:42:42,712 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 151 transitions, 1215 flow [2024-06-21 16:42:42,713 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) [2024-06-21 16:42:42,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:42,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:42,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-21 16:42:42,713 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)] === [2024-06-21 16:42:42,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:42,713 INFO L85 PathProgramCache]: Analyzing trace with hash 593000960, now seen corresponding path program 1 times [2024-06-21 16:42:42,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:42,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389598178] [2024-06-21 16:42:42,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:42,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:42,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:43,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:43,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:43,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389598178] [2024-06-21 16:42:43,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389598178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:43,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:43,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:43,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023938390] [2024-06-21 16:42:43,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:43,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:43,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:43,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:43,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:43,378 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:43,379 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 151 transitions, 1215 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:43,379 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:43,379 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:43,379 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:43,896 INFO L124 PetriNetUnfolderBase]: 2097/3343 cut-off events. [2024-06-21 16:42:43,896 INFO L125 PetriNetUnfolderBase]: For 201500/201502 co-relation queries the response was YES. [2024-06-21 16:42:43,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24206 conditions, 3343 events. 2097/3343 cut-off events. For 201500/201502 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17996 event pairs, 625 based on Foata normal form. 4/3347 useless extension candidates. Maximal degree in co-relation 24146. Up to 2921 conditions per place. [2024-06-21 16:42:43,922 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 134 selfloop transitions, 24 changer transitions 0/177 dead transitions. [2024-06-21 16:42:43,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 177 transitions, 1639 flow [2024-06-21 16:42:43,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:43,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:43,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 151 transitions. [2024-06-21 16:42:43,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4902597402597403 [2024-06-21 16:42:43,923 INFO L175 Difference]: Start difference. First operand has 133 places, 151 transitions, 1215 flow. Second operand 7 states and 151 transitions. [2024-06-21 16:42:43,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 177 transitions, 1639 flow [2024-06-21 16:42:44,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 177 transitions, 1540 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:44,013 INFO L231 Difference]: Finished difference. Result has 134 places, 155 transitions, 1231 flow [2024-06-21 16:42:44,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=151, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1231, PETRI_PLACES=134, PETRI_TRANSITIONS=155} [2024-06-21 16:42:44,014 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 89 predicate places. [2024-06-21 16:42:44,014 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 155 transitions, 1231 flow [2024-06-21 16:42:44,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:44,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:44,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:44,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-21 16:42:44,015 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:44,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:44,015 INFO L85 PathProgramCache]: Analyzing trace with hash -1169159383, now seen corresponding path program 4 times [2024-06-21 16:42:44,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:44,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734058593] [2024-06-21 16:42:44,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:44,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:44,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:44,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:44,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:44,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734058593] [2024-06-21 16:42:44,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734058593] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:44,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:44,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:44,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650061352] [2024-06-21 16:42:44,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:44,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:44,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:44,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:44,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:44,814 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:44,815 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 155 transitions, 1231 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) [2024-06-21 16:42:44,815 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:44,815 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:44,815 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:45,509 INFO L124 PetriNetUnfolderBase]: 2229/3486 cut-off events. [2024-06-21 16:42:45,509 INFO L125 PetriNetUnfolderBase]: For 212978/212980 co-relation queries the response was YES. [2024-06-21 16:42:45,521 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25478 conditions, 3486 events. 2229/3486 cut-off events. For 212978/212980 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18270 event pairs, 462 based on Foata normal form. 6/3492 useless extension candidates. Maximal degree in co-relation 25417. Up to 2996 conditions per place. [2024-06-21 16:42:45,534 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 138 selfloop transitions, 45 changer transitions 0/190 dead transitions. [2024-06-21 16:42:45,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 190 transitions, 1851 flow [2024-06-21 16:42:45,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:45,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:45,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 173 transitions. [2024-06-21 16:42:45,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4914772727272727 [2024-06-21 16:42:45,536 INFO L175 Difference]: Start difference. First operand has 134 places, 155 transitions, 1231 flow. Second operand 8 states and 173 transitions. [2024-06-21 16:42:45,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 190 transitions, 1851 flow [2024-06-21 16:42:45,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 1764 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:45,645 INFO L231 Difference]: Finished difference. Result has 137 places, 157 transitions, 1273 flow [2024-06-21 16:42:45,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1144, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1273, PETRI_PLACES=137, PETRI_TRANSITIONS=157} [2024-06-21 16:42:45,646 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 92 predicate places. [2024-06-21 16:42:45,646 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 157 transitions, 1273 flow [2024-06-21 16:42:45,646 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) [2024-06-21 16:42:45,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:45,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:45,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-21 16:42:45,647 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:45,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:45,647 INFO L85 PathProgramCache]: Analyzing trace with hash -858118897, now seen corresponding path program 5 times [2024-06-21 16:42:45,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:45,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637454170] [2024-06-21 16:42:45,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:45,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:46,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:46,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:46,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637454170] [2024-06-21 16:42:46,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637454170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:46,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:46,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:46,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238855813] [2024-06-21 16:42:46,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:46,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:46,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:46,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:46,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:46,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:46,585 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 157 transitions, 1273 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) [2024-06-21 16:42:46,585 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:46,585 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:46,585 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:47,460 INFO L124 PetriNetUnfolderBase]: 2246/3513 cut-off events. [2024-06-21 16:42:47,461 INFO L125 PetriNetUnfolderBase]: For 224077/224079 co-relation queries the response was YES. [2024-06-21 16:42:47,472 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25977 conditions, 3513 events. 2246/3513 cut-off events. For 224077/224079 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18457 event pairs, 634 based on Foata normal form. 6/3519 useless extension candidates. Maximal degree in co-relation 25915. Up to 3110 conditions per place. [2024-06-21 16:42:47,483 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 141 selfloop transitions, 41 changer transitions 0/189 dead transitions. [2024-06-21 16:42:47,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 189 transitions, 1749 flow [2024-06-21 16:42:47,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:47,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:47,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 169 transitions. [2024-06-21 16:42:47,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48011363636363635 [2024-06-21 16:42:47,485 INFO L175 Difference]: Start difference. First operand has 137 places, 157 transitions, 1273 flow. Second operand 8 states and 169 transitions. [2024-06-21 16:42:47,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 189 transitions, 1749 flow [2024-06-21 16:42:47,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 189 transitions, 1626 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:47,580 INFO L231 Difference]: Finished difference. Result has 139 places, 159 transitions, 1279 flow [2024-06-21 16:42:47,580 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1154, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1279, PETRI_PLACES=139, PETRI_TRANSITIONS=159} [2024-06-21 16:42:47,581 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 94 predicate places. [2024-06-21 16:42:47,581 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 159 transitions, 1279 flow [2024-06-21 16:42:47,581 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) [2024-06-21 16:42:47,581 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:47,581 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:47,581 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-21 16:42:47,582 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:47,582 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:47,582 INFO L85 PathProgramCache]: Analyzing trace with hash -852612367, now seen corresponding path program 6 times [2024-06-21 16:42:47,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:47,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824529510] [2024-06-21 16:42:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:47,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:47,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:48,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:48,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824529510] [2024-06-21 16:42:48,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824529510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:48,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:48,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596620057] [2024-06-21 16:42:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:48,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:48,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:48,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:48,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:48,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:48,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 159 transitions, 1279 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) [2024-06-21 16:42:48,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:48,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:48,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:49,246 INFO L124 PetriNetUnfolderBase]: 2263/3540 cut-off events. [2024-06-21 16:42:49,247 INFO L125 PetriNetUnfolderBase]: For 234856/234858 co-relation queries the response was YES. [2024-06-21 16:42:49,260 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26308 conditions, 3540 events. 2263/3540 cut-off events. For 234856/234858 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18580 event pairs, 634 based on Foata normal form. 6/3546 useless extension candidates. Maximal degree in co-relation 26245. Up to 3137 conditions per place. [2024-06-21 16:42:49,273 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 143 selfloop transitions, 38 changer transitions 0/188 dead transitions. [2024-06-21 16:42:49,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 188 transitions, 1745 flow [2024-06-21 16:42:49,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:49,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:49,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-21 16:42:49,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46875 [2024-06-21 16:42:49,275 INFO L175 Difference]: Start difference. First operand has 139 places, 159 transitions, 1279 flow. Second operand 8 states and 165 transitions. [2024-06-21 16:42:49,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 188 transitions, 1745 flow [2024-06-21 16:42:49,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 188 transitions, 1642 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:49,417 INFO L231 Difference]: Finished difference. Result has 141 places, 161 transitions, 1299 flow [2024-06-21 16:42:49,417 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1176, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1299, PETRI_PLACES=141, PETRI_TRANSITIONS=161} [2024-06-21 16:42:49,418 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 96 predicate places. [2024-06-21 16:42:49,418 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 161 transitions, 1299 flow [2024-06-21 16:42:49,418 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) [2024-06-21 16:42:49,418 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:49,418 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:49,418 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-21 16:42:49,418 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:49,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:49,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1849352266, now seen corresponding path program 2 times [2024-06-21 16:42:49,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:49,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335960312] [2024-06-21 16:42:49,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:49,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:49,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:50,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:50,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:50,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335960312] [2024-06-21 16:42:50,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335960312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:50,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:50,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:50,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [356267398] [2024-06-21 16:42:50,145 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:50,146 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:50,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:50,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:50,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:50,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:50,217 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 161 transitions, 1299 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:50,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:50,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:50,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:50,771 INFO L124 PetriNetUnfolderBase]: 2161/3455 cut-off events. [2024-06-21 16:42:50,772 INFO L125 PetriNetUnfolderBase]: For 245963/245965 co-relation queries the response was YES. [2024-06-21 16:42:50,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26210 conditions, 3455 events. 2161/3455 cut-off events. For 245963/245965 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18774 event pairs, 624 based on Foata normal form. 4/3459 useless extension candidates. Maximal degree in co-relation 26146. Up to 2985 conditions per place. [2024-06-21 16:42:50,800 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 135 selfloop transitions, 29 changer transitions 0/186 dead transitions. [2024-06-21 16:42:50,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 186 transitions, 1865 flow [2024-06-21 16:42:50,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:50,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:50,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 16:42:50,801 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:42:50,801 INFO L175 Difference]: Start difference. First operand has 141 places, 161 transitions, 1299 flow. Second operand 7 states and 147 transitions. [2024-06-21 16:42:50,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 186 transitions, 1865 flow [2024-06-21 16:42:50,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 186 transitions, 1764 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:50,931 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1400 flow [2024-06-21 16:42:50,931 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1198, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1400, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2024-06-21 16:42:50,932 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 98 predicate places. [2024-06-21 16:42:50,932 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1400 flow [2024-06-21 16:42:50,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:50,932 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:50,932 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:50,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-21 16:42:50,932 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:50,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:50,933 INFO L85 PathProgramCache]: Analyzing trace with hash 1818727180, now seen corresponding path program 1 times [2024-06-21 16:42:50,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:50,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1007271724] [2024-06-21 16:42:50,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:50,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:50,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:51,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:51,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1007271724] [2024-06-21 16:42:51,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1007271724] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:51,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:51,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:51,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1690993135] [2024-06-21 16:42:51,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:51,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:51,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:51,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:51,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:51,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:51,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 1400 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:51,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:51,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:51,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:52,284 INFO L124 PetriNetUnfolderBase]: 2299/3594 cut-off events. [2024-06-21 16:42:52,284 INFO L125 PetriNetUnfolderBase]: For 258262/258262 co-relation queries the response was YES. [2024-06-21 16:42:52,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27695 conditions, 3594 events. 2299/3594 cut-off events. For 258262/258262 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 18992 event pairs, 669 based on Foata normal form. 1/3595 useless extension candidates. Maximal degree in co-relation 27629. Up to 3320 conditions per place. [2024-06-21 16:42:52,313 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 154 selfloop transitions, 14 changer transitions 0/188 dead transitions. [2024-06-21 16:42:52,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 188 transitions, 1820 flow [2024-06-21 16:42:52,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:52,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:52,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-21 16:42:52,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43506493506493504 [2024-06-21 16:42:52,314 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1400 flow. Second operand 7 states and 134 transitions. [2024-06-21 16:42:52,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 188 transitions, 1820 flow [2024-06-21 16:42:52,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 146 places, 188 transitions, 1737 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-21 16:42:52,440 INFO L231 Difference]: Finished difference. Result has 147 places, 172 transitions, 1401 flow [2024-06-21 16:42:52,440 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1317, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1401, PETRI_PLACES=147, PETRI_TRANSITIONS=172} [2024-06-21 16:42:52,441 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 102 predicate places. [2024-06-21 16:42:52,441 INFO L495 AbstractCegarLoop]: Abstraction has has 147 places, 172 transitions, 1401 flow [2024-06-21 16:42:52,441 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:52,441 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:52,441 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:52,441 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-21 16:42:52,442 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)] === [2024-06-21 16:42:52,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:52,442 INFO L85 PathProgramCache]: Analyzing trace with hash -626923359, now seen corresponding path program 7 times [2024-06-21 16:42:52,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:52,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154348458] [2024-06-21 16:42:52,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:52,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:52,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:53,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:53,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154348458] [2024-06-21 16:42:53,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154348458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:53,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:53,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:42:53,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981614718] [2024-06-21 16:42:53,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:53,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:42:53,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:53,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:42:53,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:42:53,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:53,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 172 transitions, 1401 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) [2024-06-21 16:42:53,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:53,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:53,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:53,847 INFO L124 PetriNetUnfolderBase]: 2304/3598 cut-off events. [2024-06-21 16:42:53,848 INFO L125 PetriNetUnfolderBase]: For 269669/269671 co-relation queries the response was YES. [2024-06-21 16:42:53,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28133 conditions, 3598 events. 2304/3598 cut-off events. For 269669/269671 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18932 event pairs, 658 based on Foata normal form. 6/3603 useless extension candidates. Maximal degree in co-relation 28065. Up to 3185 conditions per place. [2024-06-21 16:42:53,877 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 152 selfloop transitions, 36 changer transitions 0/196 dead transitions. [2024-06-21 16:42:53,877 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 196 transitions, 1837 flow [2024-06-21 16:42:53,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:42:53,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:42:53,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:42:53,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-21 16:42:53,879 INFO L175 Difference]: Start difference. First operand has 147 places, 172 transitions, 1401 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:42:53,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 196 transitions, 1837 flow [2024-06-21 16:42:53,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 196 transitions, 1755 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-21 16:42:53,999 INFO L231 Difference]: Finished difference. Result has 150 places, 172 transitions, 1398 flow [2024-06-21 16:42:53,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1398, PETRI_PLACES=150, PETRI_TRANSITIONS=172} [2024-06-21 16:42:54,001 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 105 predicate places. [2024-06-21 16:42:54,001 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 172 transitions, 1398 flow [2024-06-21 16:42:54,001 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) [2024-06-21 16:42:54,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:54,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:54,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-21 16:42:54,002 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:54,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:54,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1863161836, now seen corresponding path program 3 times [2024-06-21 16:42:54,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:54,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861020301] [2024-06-21 16:42:54,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:54,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:54,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:54,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:54,778 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:54,778 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861020301] [2024-06-21 16:42:54,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861020301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:54,778 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:54,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:54,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525160935] [2024-06-21 16:42:54,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:54,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:54,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:54,779 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:54,779 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:54,867 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:54,867 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 172 transitions, 1398 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:54,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:54,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:54,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:55,379 INFO L124 PetriNetUnfolderBase]: 2178/3475 cut-off events. [2024-06-21 16:42:55,380 INFO L125 PetriNetUnfolderBase]: For 278242/278244 co-relation queries the response was YES. [2024-06-21 16:42:55,395 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27787 conditions, 3475 events. 2178/3475 cut-off events. For 278242/278244 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 18804 event pairs, 650 based on Foata normal form. 4/3478 useless extension candidates. Maximal degree in co-relation 27718. Up to 2973 conditions per place. [2024-06-21 16:42:55,410 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 127 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-21 16:42:55,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 192 transitions, 2076 flow [2024-06-21 16:42:55,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:55,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:55,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 16:42:55,411 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-21 16:42:55,411 INFO L175 Difference]: Start difference. First operand has 150 places, 172 transitions, 1398 flow. Second operand 7 states and 145 transitions. [2024-06-21 16:42:55,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 192 transitions, 2076 flow [2024-06-21 16:42:55,538 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 192 transitions, 1982 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:42:55,540 INFO L231 Difference]: Finished difference. Result has 151 places, 180 transitions, 1548 flow [2024-06-21 16:42:55,540 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1304, PETRI_DIFFERENCE_MINUEND_PLACES=143, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1548, PETRI_PLACES=151, PETRI_TRANSITIONS=180} [2024-06-21 16:42:55,541 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 106 predicate places. [2024-06-21 16:42:55,541 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 180 transitions, 1548 flow [2024-06-21 16:42:55,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:55,541 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:55,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:55,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-21 16:42:55,542 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:55,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:55,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1006666324, now seen corresponding path program 2 times [2024-06-21 16:42:55,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:55,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [221281337] [2024-06-21 16:42:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:55,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:55,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:56,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:56,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:56,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [221281337] [2024-06-21 16:42:56,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [221281337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:56,226 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:56,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:56,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432311643] [2024-06-21 16:42:56,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:56,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:56,227 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:56,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:56,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:56,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:56,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 180 transitions, 1548 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:56,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:56,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:56,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:56,789 INFO L124 PetriNetUnfolderBase]: 2300/3598 cut-off events. [2024-06-21 16:42:56,789 INFO L125 PetriNetUnfolderBase]: For 291509/291515 co-relation queries the response was YES. [2024-06-21 16:42:56,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29194 conditions, 3598 events. 2300/3598 cut-off events. For 291509/291515 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 18998 event pairs, 673 based on Foata normal form. 7/3605 useless extension candidates. Maximal degree in co-relation 29123. Up to 3309 conditions per place. [2024-06-21 16:42:56,821 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 151 selfloop transitions, 26 changer transitions 0/197 dead transitions. [2024-06-21 16:42:56,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 197 transitions, 2128 flow [2024-06-21 16:42:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:56,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:56,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 133 transitions. [2024-06-21 16:42:56,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:42:56,827 INFO L175 Difference]: Start difference. First operand has 151 places, 180 transitions, 1548 flow. Second operand 7 states and 133 transitions. [2024-06-21 16:42:56,827 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 197 transitions, 2128 flow [2024-06-21 16:42:56,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 197 transitions, 1982 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-21 16:42:56,982 INFO L231 Difference]: Finished difference. Result has 154 places, 186 transitions, 1574 flow [2024-06-21 16:42:56,982 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1402, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1574, PETRI_PLACES=154, PETRI_TRANSITIONS=186} [2024-06-21 16:42:56,983 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 109 predicate places. [2024-06-21 16:42:56,983 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 186 transitions, 1574 flow [2024-06-21 16:42:56,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:56,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:56,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:56,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-21 16:42:56,986 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:56,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:56,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1007141554, now seen corresponding path program 3 times [2024-06-21 16:42:56,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:56,987 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993151044] [2024-06-21 16:42:56,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:56,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:56,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:57,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:57,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:57,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993151044] [2024-06-21 16:42:57,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993151044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:57,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:57,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:57,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720992308] [2024-06-21 16:42:57,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:57,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:57,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:57,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:57,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:57,856 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:42:57,856 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 186 transitions, 1574 flow. Second operand has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:57,856 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:57,856 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:42:57,856 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:58,341 INFO L124 PetriNetUnfolderBase]: 2297/3594 cut-off events. [2024-06-21 16:42:58,342 INFO L125 PetriNetUnfolderBase]: For 302071/302077 co-relation queries the response was YES. [2024-06-21 16:42:58,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29181 conditions, 3594 events. 2297/3594 cut-off events. For 302071/302077 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 19001 event pairs, 673 based on Foata normal form. 7/3601 useless extension candidates. Maximal degree in co-relation 29109. Up to 3306 conditions per place. [2024-06-21 16:42:58,372 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 149 selfloop transitions, 27 changer transitions 0/196 dead transitions. [2024-06-21 16:42:58,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 196 transitions, 1950 flow [2024-06-21 16:42:58,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:58,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:58,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-21 16:42:58,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4253246753246753 [2024-06-21 16:42:58,373 INFO L175 Difference]: Start difference. First operand has 154 places, 186 transitions, 1574 flow. Second operand 7 states and 131 transitions. [2024-06-21 16:42:58,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 196 transitions, 1950 flow [2024-06-21 16:42:58,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 196 transitions, 1840 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-21 16:42:58,518 INFO L231 Difference]: Finished difference. Result has 158 places, 186 transitions, 1524 flow [2024-06-21 16:42:58,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1524, PETRI_PLACES=158, PETRI_TRANSITIONS=186} [2024-06-21 16:42:58,518 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 113 predicate places. [2024-06-21 16:42:58,518 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 186 transitions, 1524 flow [2024-06-21 16:42:58,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.75) internal successors, (102), 8 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:58,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:58,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:58,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-21 16:42:58,519 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:58,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:58,519 INFO L85 PathProgramCache]: Analyzing trace with hash 1501777210, now seen corresponding path program 1 times [2024-06-21 16:42:58,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:58,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825675515] [2024-06-21 16:42:58,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:58,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:58,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:42:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:42:59,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:42:59,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825675515] [2024-06-21 16:42:59,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825675515] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:42:59,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:42:59,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:42:59,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668356765] [2024-06-21 16:42:59,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:42:59,129 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:42:59,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:42:59,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:42:59,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:42:59,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:42:59,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 186 transitions, 1524 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:59,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:42:59,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:42:59,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:42:59,730 INFO L124 PetriNetUnfolderBase]: 2074/3349 cut-off events. [2024-06-21 16:42:59,730 INFO L125 PetriNetUnfolderBase]: For 270706/270706 co-relation queries the response was YES. [2024-06-21 16:42:59,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26466 conditions, 3349 events. 2074/3349 cut-off events. For 270706/270706 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18149 event pairs, 534 based on Foata normal form. 1/3350 useless extension candidates. Maximal degree in co-relation 26392. Up to 3009 conditions per place. [2024-06-21 16:42:59,760 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 180 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-21 16:42:59,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 205 transitions, 1998 flow [2024-06-21 16:42:59,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:42:59,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:42:59,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-21 16:42:59,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:42:59,761 INFO L175 Difference]: Start difference. First operand has 158 places, 186 transitions, 1524 flow. Second operand 7 states and 140 transitions. [2024-06-21 16:42:59,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 205 transitions, 1998 flow [2024-06-21 16:42:59,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 205 transitions, 1934 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-21 16:42:59,936 INFO L231 Difference]: Finished difference. Result has 159 places, 189 transitions, 1546 flow [2024-06-21 16:42:59,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1460, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1546, PETRI_PLACES=159, PETRI_TRANSITIONS=189} [2024-06-21 16:42:59,936 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 114 predicate places. [2024-06-21 16:42:59,936 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 189 transitions, 1546 flow [2024-06-21 16:42:59,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:42:59,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:42:59,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:42:59,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-21 16:42:59,937 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:42:59,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:42:59,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1855072572, now seen corresponding path program 1 times [2024-06-21 16:42:59,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:42:59,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400519503] [2024-06-21 16:42:59,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:42:59,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:42:59,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:00,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:00,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:00,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400519503] [2024-06-21 16:43:00,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400519503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:00,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:00,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:00,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562044052] [2024-06-21 16:43:00,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:00,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:00,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:00,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:00,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:00,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:00,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 189 transitions, 1546 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:00,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:00,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:00,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:01,259 INFO L124 PetriNetUnfolderBase]: 2091/3368 cut-off events. [2024-06-21 16:43:01,259 INFO L125 PetriNetUnfolderBase]: For 279927/279927 co-relation queries the response was YES. [2024-06-21 16:43:01,277 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26967 conditions, 3368 events. 2091/3368 cut-off events. For 279927/279927 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18279 event pairs, 576 based on Foata normal form. 1/3369 useless extension candidates. Maximal degree in co-relation 26892. Up to 3009 conditions per place. [2024-06-21 16:43:01,291 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 169 selfloop transitions, 14 changer transitions 0/205 dead transitions. [2024-06-21 16:43:01,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 205 transitions, 1992 flow [2024-06-21 16:43:01,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:01,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:01,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-21 16:43:01,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4448051948051948 [2024-06-21 16:43:01,292 INFO L175 Difference]: Start difference. First operand has 159 places, 189 transitions, 1546 flow. Second operand 7 states and 137 transitions. [2024-06-21 16:43:01,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 205 transitions, 1992 flow [2024-06-21 16:43:01,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 205 transitions, 1928 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:01,559 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 1570 flow [2024-06-21 16:43:01,559 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1570, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-06-21 16:43:01,559 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 116 predicate places. [2024-06-21 16:43:01,560 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 1570 flow [2024-06-21 16:43:01,560 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:01,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:01,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:01,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-21 16:43:01,560 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:01,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:01,561 INFO L85 PathProgramCache]: Analyzing trace with hash 770675228, now seen corresponding path program 2 times [2024-06-21 16:43:01,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:01,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828143755] [2024-06-21 16:43:01,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:01,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:01,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:02,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828143755] [2024-06-21 16:43:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828143755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:02,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:02,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:02,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320668292] [2024-06-21 16:43:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:02,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:02,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:02,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:02,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:02,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:02,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 1570 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:02,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:02,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:02,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:03,013 INFO L124 PetriNetUnfolderBase]: 2094/3373 cut-off events. [2024-06-21 16:43:03,014 INFO L125 PetriNetUnfolderBase]: For 292604/292604 co-relation queries the response was YES. [2024-06-21 16:43:03,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27626 conditions, 3373 events. 2094/3373 cut-off events. For 292604/292604 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18207 event pairs, 533 based on Foata normal form. 1/3374 useless extension candidates. Maximal degree in co-relation 27550. Up to 3025 conditions per place. [2024-06-21 16:43:03,046 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 177 selfloop transitions, 19 changer transitions 0/208 dead transitions. [2024-06-21 16:43:03,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 208 transitions, 2048 flow [2024-06-21 16:43:03,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:03,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:03,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 139 transitions. [2024-06-21 16:43:03,047 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4512987012987013 [2024-06-21 16:43:03,047 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 1570 flow. Second operand 7 states and 139 transitions. [2024-06-21 16:43:03,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 208 transitions, 2048 flow [2024-06-21 16:43:03,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 208 transitions, 1982 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:03,254 INFO L231 Difference]: Finished difference. Result has 163 places, 195 transitions, 1608 flow [2024-06-21 16:43:03,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=192, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1608, PETRI_PLACES=163, PETRI_TRANSITIONS=195} [2024-06-21 16:43:03,254 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 118 predicate places. [2024-06-21 16:43:03,254 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 195 transitions, 1608 flow [2024-06-21 16:43:03,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:03,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:03,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:03,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-21 16:43:03,255 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:03,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:03,255 INFO L85 PathProgramCache]: Analyzing trace with hash 1007147506, now seen corresponding path program 2 times [2024-06-21 16:43:03,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:03,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186465223] [2024-06-21 16:43:03,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:03,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:03,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:03,968 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:03,968 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:03,968 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186465223] [2024-06-21 16:43:03,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186465223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:03,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:03,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:03,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493949472] [2024-06-21 16:43:03,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:03,969 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:03,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:03,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:03,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:04,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:04,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 195 transitions, 1608 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:04,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:04,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:04,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:04,618 INFO L124 PetriNetUnfolderBase]: 2101/3383 cut-off events. [2024-06-21 16:43:04,618 INFO L125 PetriNetUnfolderBase]: For 302031/302033 co-relation queries the response was YES. [2024-06-21 16:43:04,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28004 conditions, 3383 events. 2101/3383 cut-off events. For 302031/302033 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 18390 event pairs, 580 based on Foata normal form. 3/3386 useless extension candidates. Maximal degree in co-relation 27927. Up to 3005 conditions per place. [2024-06-21 16:43:04,647 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 162 selfloop transitions, 27 changer transitions 0/212 dead transitions. [2024-06-21 16:43:04,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 169 places, 212 transitions, 2226 flow [2024-06-21 16:43:04,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:04,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:04,648 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:43:04,648 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:43:04,648 INFO L175 Difference]: Start difference. First operand has 163 places, 195 transitions, 1608 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:43:04,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 169 places, 212 transitions, 2226 flow [2024-06-21 16:43:04,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 212 transitions, 2144 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:04,838 INFO L231 Difference]: Finished difference. Result has 165 places, 201 transitions, 1704 flow [2024-06-21 16:43:04,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1526, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1704, PETRI_PLACES=165, PETRI_TRANSITIONS=201} [2024-06-21 16:43:04,839 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 120 predicate places. [2024-06-21 16:43:04,839 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 201 transitions, 1704 flow [2024-06-21 16:43:04,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:04,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:04,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:04,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-21 16:43:04,839 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:04,840 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:04,840 INFO L85 PathProgramCache]: Analyzing trace with hash 1006850836, now seen corresponding path program 3 times [2024-06-21 16:43:04,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:04,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001743391] [2024-06-21 16:43:04,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:04,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:04,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:05,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:05,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:05,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001743391] [2024-06-21 16:43:05,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001743391] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:05,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:05,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:05,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395135156] [2024-06-21 16:43:05,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:05,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:05,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:05,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:05,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:05,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:05,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 201 transitions, 1704 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:05,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:05,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:05,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:06,320 INFO L124 PetriNetUnfolderBase]: 2098/3379 cut-off events. [2024-06-21 16:43:06,320 INFO L125 PetriNetUnfolderBase]: For 313218/313220 co-relation queries the response was YES. [2024-06-21 16:43:06,336 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28392 conditions, 3379 events. 2098/3379 cut-off events. For 313218/313220 co-relation queries the response was YES. Maximal size of possible extension queue 143. Compared 18332 event pairs, 580 based on Foata normal form. 3/3382 useless extension candidates. Maximal degree in co-relation 28314. Up to 3002 conditions per place. [2024-06-21 16:43:06,351 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 162 selfloop transitions, 26 changer transitions 0/211 dead transitions. [2024-06-21 16:43:06,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 211 transitions, 2104 flow [2024-06-21 16:43:06,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:06,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:06,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:43:06,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:43:06,352 INFO L175 Difference]: Start difference. First operand has 165 places, 201 transitions, 1704 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:43:06,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 211 transitions, 2104 flow [2024-06-21 16:43:06,606 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 211 transitions, 1990 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-21 16:43:06,608 INFO L231 Difference]: Finished difference. Result has 168 places, 201 transitions, 1648 flow [2024-06-21 16:43:06,608 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1590, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1648, PETRI_PLACES=168, PETRI_TRANSITIONS=201} [2024-06-21 16:43:06,609 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 123 predicate places. [2024-06-21 16:43:06,609 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 201 transitions, 1648 flow [2024-06-21 16:43:06,609 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:06,609 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:06,609 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:06,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-21 16:43:06,609 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:06,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:06,610 INFO L85 PathProgramCache]: Analyzing trace with hash 1006850588, now seen corresponding path program 3 times [2024-06-21 16:43:06,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:06,610 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196525531] [2024-06-21 16:43:06,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:06,610 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:06,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:07,323 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:07,323 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:07,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196525531] [2024-06-21 16:43:07,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196525531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:07,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:07,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:07,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944877309] [2024-06-21 16:43:07,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:07,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:07,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:07,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:07,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:07,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:07,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 201 transitions, 1648 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:07,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:07,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:07,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:07,941 INFO L124 PetriNetUnfolderBase]: 2093/3374 cut-off events. [2024-06-21 16:43:07,941 INFO L125 PetriNetUnfolderBase]: For 321852/321854 co-relation queries the response was YES. [2024-06-21 16:43:07,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28527 conditions, 3374 events. 2093/3374 cut-off events. For 321852/321854 co-relation queries the response was YES. Maximal size of possible extension queue 141. Compared 18263 event pairs, 541 based on Foata normal form. 3/3377 useless extension candidates. Maximal degree in co-relation 28448. Up to 3014 conditions per place. [2024-06-21 16:43:08,028 INFO L140 encePairwiseOnDemand]: 35/44 looper letters, 174 selfloop transitions, 26 changer transitions 0/214 dead transitions. [2024-06-21 16:43:08,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 214 transitions, 2132 flow [2024-06-21 16:43:08,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:08,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:08,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-21 16:43:08,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44805194805194803 [2024-06-21 16:43:08,029 INFO L175 Difference]: Start difference. First operand has 168 places, 201 transitions, 1648 flow. Second operand 7 states and 138 transitions. [2024-06-21 16:43:08,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 214 transitions, 2132 flow [2024-06-21 16:43:08,234 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 214 transitions, 2060 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:08,236 INFO L231 Difference]: Finished difference. Result has 169 places, 204 transitions, 1700 flow [2024-06-21 16:43:08,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1576, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=201, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1700, PETRI_PLACES=169, PETRI_TRANSITIONS=204} [2024-06-21 16:43:08,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 124 predicate places. [2024-06-21 16:43:08,240 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 204 transitions, 1700 flow [2024-06-21 16:43:08,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:08,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:08,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:08,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-21 16:43:08,241 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:08,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:08,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1591768132, now seen corresponding path program 1 times [2024-06-21 16:43:08,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:08,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703144058] [2024-06-21 16:43:08,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:08,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:09,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:09,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:09,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703144058] [2024-06-21 16:43:09,064 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703144058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:09,064 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:09,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:09,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993180006] [2024-06-21 16:43:09,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:09,065 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:09,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:09,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:09,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:09,167 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:09,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 204 transitions, 1700 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:09,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:09,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:09,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:09,971 INFO L124 PetriNetUnfolderBase]: 2488/3889 cut-off events. [2024-06-21 16:43:09,971 INFO L125 PetriNetUnfolderBase]: For 427774/427792 co-relation queries the response was YES. [2024-06-21 16:43:09,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34344 conditions, 3889 events. 2488/3889 cut-off events. For 427774/427792 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 20705 event pairs, 428 based on Foata normal form. 16/3901 useless extension candidates. Maximal degree in co-relation 34264. Up to 2555 conditions per place. [2024-06-21 16:43:10,016 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 167 selfloop transitions, 71 changer transitions 0/251 dead transitions. [2024-06-21 16:43:10,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 251 transitions, 2552 flow [2024-06-21 16:43:10,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:10,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:10,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 16:43:10,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-21 16:43:10,017 INFO L175 Difference]: Start difference. First operand has 169 places, 204 transitions, 1700 flow. Second operand 9 states and 197 transitions. [2024-06-21 16:43:10,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 251 transitions, 2552 flow [2024-06-21 16:43:10,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 251 transitions, 2450 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:10,367 INFO L231 Difference]: Finished difference. Result has 173 places, 206 transitions, 1796 flow [2024-06-21 16:43:10,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1598, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1796, PETRI_PLACES=173, PETRI_TRANSITIONS=206} [2024-06-21 16:43:10,368 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 128 predicate places. [2024-06-21 16:43:10,368 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 206 transitions, 1796 flow [2024-06-21 16:43:10,368 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:10,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:10,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:10,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-21 16:43:10,369 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:10,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:10,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1005104158, now seen corresponding path program 2 times [2024-06-21 16:43:10,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:10,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068907631] [2024-06-21 16:43:10,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:10,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:10,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:11,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:11,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:11,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068907631] [2024-06-21 16:43:11,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1068907631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:11,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:11,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:11,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514716259] [2024-06-21 16:43:11,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:11,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:11,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:11,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:11,286 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:11,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:11,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 206 transitions, 1796 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:11,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:11,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:11,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:12,281 INFO L124 PetriNetUnfolderBase]: 2584/4058 cut-off events. [2024-06-21 16:43:12,281 INFO L125 PetriNetUnfolderBase]: For 451197/451199 co-relation queries the response was YES. [2024-06-21 16:43:12,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35822 conditions, 4058 events. 2584/4058 cut-off events. For 451197/451199 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 22025 event pairs, 655 based on Foata normal form. 24/4082 useless extension candidates. Maximal degree in co-relation 35741. Up to 3260 conditions per place. [2024-06-21 16:43:12,326 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 167 selfloop transitions, 65 changer transitions 0/245 dead transitions. [2024-06-21 16:43:12,326 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 245 transitions, 2418 flow [2024-06-21 16:43:12,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:12,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:12,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 194 transitions. [2024-06-21 16:43:12,327 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4898989898989899 [2024-06-21 16:43:12,328 INFO L175 Difference]: Start difference. First operand has 173 places, 206 transitions, 1796 flow. Second operand 9 states and 194 transitions. [2024-06-21 16:43:12,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 245 transitions, 2418 flow [2024-06-21 16:43:12,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 245 transitions, 2332 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:12,691 INFO L231 Difference]: Finished difference. Result has 177 places, 208 transitions, 1900 flow [2024-06-21 16:43:12,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1710, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1900, PETRI_PLACES=177, PETRI_TRANSITIONS=208} [2024-06-21 16:43:12,692 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 132 predicate places. [2024-06-21 16:43:12,692 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 208 transitions, 1900 flow [2024-06-21 16:43:12,692 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:12,692 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:12,692 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:12,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-21 16:43:12,693 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:12,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:12,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1005281788, now seen corresponding path program 3 times [2024-06-21 16:43:12,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:12,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462507140] [2024-06-21 16:43:12,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:12,694 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:12,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:13,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:13,498 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:13,498 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462507140] [2024-06-21 16:43:13,498 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462507140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:13,498 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:13,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:13,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64841716] [2024-06-21 16:43:13,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:13,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:13,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:13,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:13,498 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:13,626 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:13,626 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 208 transitions, 1900 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:13,626 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:13,626 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:13,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:14,611 INFO L124 PetriNetUnfolderBase]: 2642/4171 cut-off events. [2024-06-21 16:43:14,611 INFO L125 PetriNetUnfolderBase]: For 462061/462063 co-relation queries the response was YES. [2024-06-21 16:43:14,638 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36970 conditions, 4171 events. 2642/4171 cut-off events. For 462061/462063 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 22954 event pairs, 660 based on Foata normal form. 16/4187 useless extension candidates. Maximal degree in co-relation 36887. Up to 3248 conditions per place. [2024-06-21 16:43:14,659 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 170 selfloop transitions, 67 changer transitions 0/250 dead transitions. [2024-06-21 16:43:14,659 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 250 transitions, 2526 flow [2024-06-21 16:43:14,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:14,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:14,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 16:43:14,660 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-21 16:43:14,660 INFO L175 Difference]: Start difference. First operand has 177 places, 208 transitions, 1900 flow. Second operand 9 states and 197 transitions. [2024-06-21 16:43:14,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 250 transitions, 2526 flow [2024-06-21 16:43:15,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 250 transitions, 2366 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:15,100 INFO L231 Difference]: Finished difference. Result has 179 places, 209 transitions, 1910 flow [2024-06-21 16:43:15,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1740, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=141, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1910, PETRI_PLACES=179, PETRI_TRANSITIONS=209} [2024-06-21 16:43:15,100 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 134 predicate places. [2024-06-21 16:43:15,100 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 209 transitions, 1910 flow [2024-06-21 16:43:15,101 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:15,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:15,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:15,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-21 16:43:15,114 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)] === [2024-06-21 16:43:15,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:15,114 INFO L85 PathProgramCache]: Analyzing trace with hash 42339396, now seen corresponding path program 4 times [2024-06-21 16:43:15,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:15,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106445411] [2024-06-21 16:43:15,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:15,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:15,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:15,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:15,898 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106445411] [2024-06-21 16:43:15,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106445411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:15,898 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:15,898 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:15,898 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982959295] [2024-06-21 16:43:15,898 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:15,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:15,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:15,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:15,899 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:16,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:16,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 209 transitions, 1910 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:16,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:16,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:16,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:16,889 INFO L124 PetriNetUnfolderBase]: 2700/4274 cut-off events. [2024-06-21 16:43:16,889 INFO L125 PetriNetUnfolderBase]: For 478518/478520 co-relation queries the response was YES. [2024-06-21 16:43:16,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37543 conditions, 4274 events. 2700/4274 cut-off events. For 478518/478520 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 23780 event pairs, 670 based on Foata normal form. 16/4290 useless extension candidates. Maximal degree in co-relation 37459. Up to 3213 conditions per place. [2024-06-21 16:43:16,934 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 169 selfloop transitions, 70 changer transitions 0/252 dead transitions. [2024-06-21 16:43:16,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 252 transitions, 2544 flow [2024-06-21 16:43:16,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:16,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:16,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-21 16:43:16,936 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-21 16:43:16,936 INFO L175 Difference]: Start difference. First operand has 179 places, 209 transitions, 1910 flow. Second operand 9 states and 198 transitions. [2024-06-21 16:43:16,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 252 transitions, 2544 flow [2024-06-21 16:43:17,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 252 transitions, 2392 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:17,244 INFO L231 Difference]: Finished difference. Result has 181 places, 210 transitions, 1936 flow [2024-06-21 16:43:17,245 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1758, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1936, PETRI_PLACES=181, PETRI_TRANSITIONS=210} [2024-06-21 16:43:17,245 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 136 predicate places. [2024-06-21 16:43:17,245 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 210 transitions, 1936 flow [2024-06-21 16:43:17,245 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:17,246 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:17,246 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:17,246 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-21 16:43:17,246 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:17,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:17,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1082841086, now seen corresponding path program 1 times [2024-06-21 16:43:17,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:17,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172725594] [2024-06-21 16:43:17,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:17,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:17,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:17,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:17,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:17,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172725594] [2024-06-21 16:43:17,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172725594] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:17,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:17,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:17,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1671496820] [2024-06-21 16:43:17,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:17,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:17,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:17,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:17,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:18,054 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:18,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 210 transitions, 1936 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:18,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:18,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:18,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:18,893 INFO L124 PetriNetUnfolderBase]: 2649/4218 cut-off events. [2024-06-21 16:43:18,893 INFO L125 PetriNetUnfolderBase]: For 474750/474752 co-relation queries the response was YES. [2024-06-21 16:43:18,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37395 conditions, 4218 events. 2649/4218 cut-off events. For 474750/474752 co-relation queries the response was YES. Maximal size of possible extension queue 198. Compared 23822 event pairs, 755 based on Foata normal form. 4/4210 useless extension candidates. Maximal degree in co-relation 37310. Up to 3830 conditions per place. [2024-06-21 16:43:18,948 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 186 selfloop transitions, 28 changer transitions 0/237 dead transitions. [2024-06-21 16:43:18,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 237 transitions, 2496 flow [2024-06-21 16:43:18,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:18,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:18,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 161 transitions. [2024-06-21 16:43:18,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45738636363636365 [2024-06-21 16:43:18,950 INFO L175 Difference]: Start difference. First operand has 181 places, 210 transitions, 1936 flow. Second operand 8 states and 161 transitions. [2024-06-21 16:43:18,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 237 transitions, 2496 flow [2024-06-21 16:43:19,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 237 transitions, 2336 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:19,457 INFO L231 Difference]: Finished difference. Result has 182 places, 214 transitions, 1921 flow [2024-06-21 16:43:19,457 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1776, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1921, PETRI_PLACES=182, PETRI_TRANSITIONS=214} [2024-06-21 16:43:19,457 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 137 predicate places. [2024-06-21 16:43:19,457 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 214 transitions, 1921 flow [2024-06-21 16:43:19,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:19,458 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:19,458 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:19,458 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-21 16:43:19,458 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:19,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:19,458 INFO L85 PathProgramCache]: Analyzing trace with hash -327739580, now seen corresponding path program 5 times [2024-06-21 16:43:19,459 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:19,459 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343544640] [2024-06-21 16:43:19,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:19,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:20,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:20,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343544640] [2024-06-21 16:43:20,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343544640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:20,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:20,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:20,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848659783] [2024-06-21 16:43:20,369 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:20,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:20,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:20,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:20,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:20,489 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:20,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 214 transitions, 1921 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:20,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:20,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:21,448 INFO L124 PetriNetUnfolderBase]: 2843/4515 cut-off events. [2024-06-21 16:43:21,448 INFO L125 PetriNetUnfolderBase]: For 525952/525954 co-relation queries the response was YES. [2024-06-21 16:43:21,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39880 conditions, 4515 events. 2843/4515 cut-off events. For 525952/525954 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 25567 event pairs, 540 based on Foata normal form. 16/4531 useless extension candidates. Maximal degree in co-relation 39794. Up to 3331 conditions per place. [2024-06-21 16:43:21,501 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 172 selfloop transitions, 77 changer transitions 0/263 dead transitions. [2024-06-21 16:43:21,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 263 transitions, 2819 flow [2024-06-21 16:43:21,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:21,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:21,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 16:43:21,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-21 16:43:21,503 INFO L175 Difference]: Start difference. First operand has 182 places, 214 transitions, 1921 flow. Second operand 9 states and 203 transitions. [2024-06-21 16:43:21,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 263 transitions, 2819 flow [2024-06-21 16:43:21,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 263 transitions, 2702 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:21,898 INFO L231 Difference]: Finished difference. Result has 185 places, 216 transitions, 2030 flow [2024-06-21 16:43:21,898 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1804, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2030, PETRI_PLACES=185, PETRI_TRANSITIONS=216} [2024-06-21 16:43:21,899 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 140 predicate places. [2024-06-21 16:43:21,899 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 216 transitions, 2030 flow [2024-06-21 16:43:21,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:21,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:21,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:21,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-21 16:43:21,900 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:21,900 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash -654744440, now seen corresponding path program 6 times [2024-06-21 16:43:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:21,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788841642] [2024-06-21 16:43:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:21,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:21,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:22,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:22,743 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:22,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788841642] [2024-06-21 16:43:22,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788841642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:22,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:22,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:22,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720663077] [2024-06-21 16:43:22,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:22,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:22,744 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:22,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:22,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:22,872 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:22,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 216 transitions, 2030 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:22,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:22,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:22,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:23,935 INFO L124 PetriNetUnfolderBase]: 2918/4655 cut-off events. [2024-06-21 16:43:23,935 INFO L125 PetriNetUnfolderBase]: For 552184/552186 co-relation queries the response was YES. [2024-06-21 16:43:23,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41158 conditions, 4655 events. 2918/4655 cut-off events. For 552184/552186 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 26796 event pairs, 762 based on Foata normal form. 20/4675 useless extension candidates. Maximal degree in co-relation 41071. Up to 3824 conditions per place. [2024-06-21 16:43:23,982 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 175 selfloop transitions, 66 changer transitions 0/255 dead transitions. [2024-06-21 16:43:23,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 255 transitions, 2662 flow [2024-06-21 16:43:23,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:23,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 16:43:23,996 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-21 16:43:23,996 INFO L175 Difference]: Start difference. First operand has 185 places, 216 transitions, 2030 flow. Second operand 9 states and 193 transitions. [2024-06-21 16:43:23,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 255 transitions, 2662 flow [2024-06-21 16:43:24,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 255 transitions, 2551 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:24,381 INFO L231 Difference]: Finished difference. Result has 189 places, 217 transitions, 2094 flow [2024-06-21 16:43:24,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1919, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2094, PETRI_PLACES=189, PETRI_TRANSITIONS=217} [2024-06-21 16:43:24,383 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 144 predicate places. [2024-06-21 16:43:24,383 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 217 transitions, 2094 flow [2024-06-21 16:43:24,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:24,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:24,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:24,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-21 16:43:24,383 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:24,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:24,384 INFO L85 PathProgramCache]: Analyzing trace with hash -831880610, now seen corresponding path program 7 times [2024-06-21 16:43:24,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:24,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53128768] [2024-06-21 16:43:24,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:24,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:24,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:25,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:25,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:25,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53128768] [2024-06-21 16:43:25,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53128768] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:25,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:25,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:25,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245536379] [2024-06-21 16:43:25,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:25,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:25,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:25,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:25,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:25,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:25,313 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 217 transitions, 2094 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:25,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:25,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:25,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:26,423 INFO L124 PetriNetUnfolderBase]: 3087/4934 cut-off events. [2024-06-21 16:43:26,423 INFO L125 PetriNetUnfolderBase]: For 595484/595486 co-relation queries the response was YES. [2024-06-21 16:43:26,454 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44104 conditions, 4934 events. 3087/4934 cut-off events. For 595484/595486 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 28842 event pairs, 766 based on Foata normal form. 16/4950 useless extension candidates. Maximal degree in co-relation 44015. Up to 3947 conditions per place. [2024-06-21 16:43:26,477 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 180 selfloop transitions, 72 changer transitions 0/266 dead transitions. [2024-06-21 16:43:26,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 266 transitions, 3016 flow [2024-06-21 16:43:26,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:26,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:26,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-21 16:43:26,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5126262626262627 [2024-06-21 16:43:26,478 INFO L175 Difference]: Start difference. First operand has 189 places, 217 transitions, 2094 flow. Second operand 9 states and 203 transitions. [2024-06-21 16:43:26,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 266 transitions, 3016 flow [2024-06-21 16:43:26,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 266 transitions, 2867 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:26,818 INFO L231 Difference]: Finished difference. Result has 191 places, 219 transitions, 2169 flow [2024-06-21 16:43:26,818 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=1945, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2169, PETRI_PLACES=191, PETRI_TRANSITIONS=219} [2024-06-21 16:43:26,818 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 146 predicate places. [2024-06-21 16:43:26,818 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 219 transitions, 2169 flow [2024-06-21 16:43:26,818 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:26,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:26,819 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:26,819 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-21 16:43:26,819 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:26,819 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:26,819 INFO L85 PathProgramCache]: Analyzing trace with hash -1884081114, now seen corresponding path program 8 times [2024-06-21 16:43:26,819 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:26,819 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1163383247] [2024-06-21 16:43:26,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:26,820 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:26,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:27,648 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:27,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:27,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1163383247] [2024-06-21 16:43:27,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1163383247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:27,649 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:27,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:27,649 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117945317] [2024-06-21 16:43:27,649 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:27,649 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:27,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:27,652 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:27,652 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:27,733 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:27,733 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 219 transitions, 2169 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:27,733 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:27,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:27,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:28,848 INFO L124 PetriNetUnfolderBase]: 3051/4873 cut-off events. [2024-06-21 16:43:28,849 INFO L125 PetriNetUnfolderBase]: For 590108/590110 co-relation queries the response was YES. [2024-06-21 16:43:28,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42960 conditions, 4873 events. 3051/4873 cut-off events. For 590108/590110 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 28421 event pairs, 768 based on Foata normal form. 20/4893 useless extension candidates. Maximal degree in co-relation 42870. Up to 4047 conditions per place. [2024-06-21 16:43:28,901 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 176 selfloop transitions, 70 changer transitions 0/260 dead transitions. [2024-06-21 16:43:28,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 260 transitions, 2785 flow [2024-06-21 16:43:28,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:28,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:28,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 16:43:28,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-21 16:43:28,902 INFO L175 Difference]: Start difference. First operand has 191 places, 219 transitions, 2169 flow. Second operand 9 states and 197 transitions. [2024-06-21 16:43:28,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 260 transitions, 2785 flow [2024-06-21 16:43:29,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 260 transitions, 2653 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:29,332 INFO L231 Difference]: Finished difference. Result has 195 places, 219 transitions, 2184 flow [2024-06-21 16:43:29,332 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2037, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2184, PETRI_PLACES=195, PETRI_TRANSITIONS=219} [2024-06-21 16:43:29,333 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 150 predicate places. [2024-06-21 16:43:29,333 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 219 transitions, 2184 flow [2024-06-21 16:43:29,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:29,333 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:29,333 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:29,333 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-21 16:43:29,334 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:29,334 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:29,334 INFO L85 PathProgramCache]: Analyzing trace with hash -156744200, now seen corresponding path program 9 times [2024-06-21 16:43:29,335 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:29,335 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164152439] [2024-06-21 16:43:29,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:29,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:29,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:30,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:30,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:30,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164152439] [2024-06-21 16:43:30,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164152439] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:30,140 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:30,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:30,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714962599] [2024-06-21 16:43:30,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:30,141 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:30,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:30,145 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:30,145 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:30,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:30,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 219 transitions, 2184 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:30,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:30,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:30,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:31,396 INFO L124 PetriNetUnfolderBase]: 3126/5008 cut-off events. [2024-06-21 16:43:31,396 INFO L125 PetriNetUnfolderBase]: For 607140/607142 co-relation queries the response was YES. [2024-06-21 16:43:31,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43866 conditions, 5008 events. 3126/5008 cut-off events. For 607140/607142 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 29527 event pairs, 797 based on Foata normal form. 20/5028 useless extension candidates. Maximal degree in co-relation 43774. Up to 4172 conditions per place. [2024-06-21 16:43:31,456 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 180 selfloop transitions, 65 changer transitions 0/259 dead transitions. [2024-06-21 16:43:31,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 259 transitions, 2832 flow [2024-06-21 16:43:31,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:31,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-21 16:43:31,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-06-21 16:43:31,458 INFO L175 Difference]: Start difference. First operand has 195 places, 219 transitions, 2184 flow. Second operand 9 states and 195 transitions. [2024-06-21 16:43:31,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 259 transitions, 2832 flow [2024-06-21 16:43:31,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 259 transitions, 2687 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:31,895 INFO L231 Difference]: Finished difference. Result has 196 places, 220 transitions, 2216 flow [2024-06-21 16:43:31,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2039, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=219, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2216, PETRI_PLACES=196, PETRI_TRANSITIONS=220} [2024-06-21 16:43:31,896 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 151 predicate places. [2024-06-21 16:43:31,896 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 220 transitions, 2216 flow [2024-06-21 16:43:31,896 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:31,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:31,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:31,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-21 16:43:31,897 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)] === [2024-06-21 16:43:31,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:31,897 INFO L85 PathProgramCache]: Analyzing trace with hash -661178180, now seen corresponding path program 10 times [2024-06-21 16:43:31,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:31,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723739565] [2024-06-21 16:43:31,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:31,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:31,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:32,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:32,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:32,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723739565] [2024-06-21 16:43:32,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723739565] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:32,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:32,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:32,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741446653] [2024-06-21 16:43:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:32,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:32,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:32,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:32,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:32,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 220 transitions, 2216 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:32,914 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:32,914 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:32,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:33,968 INFO L124 PetriNetUnfolderBase]: 3184/5106 cut-off events. [2024-06-21 16:43:33,968 INFO L125 PetriNetUnfolderBase]: For 622693/622695 co-relation queries the response was YES. [2024-06-21 16:43:34,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44694 conditions, 5106 events. 3184/5106 cut-off events. For 622693/622695 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 30276 event pairs, 783 based on Foata normal form. 16/5122 useless extension candidates. Maximal degree in co-relation 44601. Up to 4040 conditions per place. [2024-06-21 16:43:34,024 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 181 selfloop transitions, 68 changer transitions 0/263 dead transitions. [2024-06-21 16:43:34,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 263 transitions, 2884 flow [2024-06-21 16:43:34,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:34,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 197 transitions. [2024-06-21 16:43:34,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49747474747474746 [2024-06-21 16:43:34,026 INFO L175 Difference]: Start difference. First operand has 196 places, 220 transitions, 2216 flow. Second operand 9 states and 197 transitions. [2024-06-21 16:43:34,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 263 transitions, 2884 flow [2024-06-21 16:43:34,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 263 transitions, 2733 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:34,469 INFO L231 Difference]: Finished difference. Result has 198 places, 221 transitions, 2249 flow [2024-06-21 16:43:34,469 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2065, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2249, PETRI_PLACES=198, PETRI_TRANSITIONS=221} [2024-06-21 16:43:34,469 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-21 16:43:34,470 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 221 transitions, 2249 flow [2024-06-21 16:43:34,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:34,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:34,470 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:34,470 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-21 16:43:34,470 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:34,470 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:34,471 INFO L85 PathProgramCache]: Analyzing trace with hash 1495083241, now seen corresponding path program 1 times [2024-06-21 16:43:34,471 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:34,471 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1403046588] [2024-06-21 16:43:34,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:34,471 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:34,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:35,087 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:35,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:35,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1403046588] [2024-06-21 16:43:35,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1403046588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:35,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:35,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:35,088 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201489267] [2024-06-21 16:43:35,088 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:35,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:35,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:35,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:35,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:35,208 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:35,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 221 transitions, 2249 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:35,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:35,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:35,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:36,051 INFO L124 PetriNetUnfolderBase]: 3024/4924 cut-off events. [2024-06-21 16:43:36,051 INFO L125 PetriNetUnfolderBase]: For 618050/618052 co-relation queries the response was YES. [2024-06-21 16:43:36,082 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44015 conditions, 4924 events. 3024/4924 cut-off events. For 618050/618052 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29867 event pairs, 861 based on Foata normal form. 4/4892 useless extension candidates. Maximal degree in co-relation 43921. Up to 4403 conditions per place. [2024-06-21 16:43:36,102 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 189 selfloop transitions, 23 changer transitions 0/244 dead transitions. [2024-06-21 16:43:36,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 244 transitions, 2774 flow [2024-06-21 16:43:36,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:36,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:36,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-21 16:43:36,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-21 16:43:36,103 INFO L175 Difference]: Start difference. First operand has 198 places, 221 transitions, 2249 flow. Second operand 7 states and 148 transitions. [2024-06-21 16:43:36,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 244 transitions, 2774 flow [2024-06-21 16:43:36,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 244 transitions, 2610 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:36,514 INFO L231 Difference]: Finished difference. Result has 198 places, 225 transitions, 2199 flow [2024-06-21 16:43:36,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2085, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=221, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2199, PETRI_PLACES=198, PETRI_TRANSITIONS=225} [2024-06-21 16:43:36,514 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 153 predicate places. [2024-06-21 16:43:36,514 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 225 transitions, 2199 flow [2024-06-21 16:43:36,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:36,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:36,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:36,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-21 16:43:36,515 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:36,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:36,515 INFO L85 PathProgramCache]: Analyzing trace with hash -896414541, now seen corresponding path program 2 times [2024-06-21 16:43:36,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:36,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013867462] [2024-06-21 16:43:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:36,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:36,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:37,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:37,151 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:37,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013867462] [2024-06-21 16:43:37,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013867462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:37,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:37,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:37,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1549057690] [2024-06-21 16:43:37,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:37,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:37,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:37,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:37,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:37,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:37,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 225 transitions, 2199 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:37,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:37,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:37,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:38,122 INFO L124 PetriNetUnfolderBase]: 3026/4927 cut-off events. [2024-06-21 16:43:38,123 INFO L125 PetriNetUnfolderBase]: For 629271/629273 co-relation queries the response was YES. [2024-06-21 16:43:38,157 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43750 conditions, 4927 events. 3026/4927 cut-off events. For 629271/629273 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 29911 event pairs, 861 based on Foata normal form. 4/4895 useless extension candidates. Maximal degree in co-relation 43655. Up to 4374 conditions per place. [2024-06-21 16:43:38,180 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 178 selfloop transitions, 35 changer transitions 0/245 dead transitions. [2024-06-21 16:43:38,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 245 transitions, 2851 flow [2024-06-21 16:43:38,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:38,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:38,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 147 transitions. [2024-06-21 16:43:38,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:43:38,184 INFO L175 Difference]: Start difference. First operand has 198 places, 225 transitions, 2199 flow. Second operand 7 states and 147 transitions. [2024-06-21 16:43:38,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 245 transitions, 2851 flow [2024-06-21 16:43:38,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 245 transitions, 2778 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:38,646 INFO L231 Difference]: Finished difference. Result has 200 places, 228 transitions, 2259 flow [2024-06-21 16:43:38,646 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2126, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2259, PETRI_PLACES=200, PETRI_TRANSITIONS=228} [2024-06-21 16:43:38,647 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 155 predicate places. [2024-06-21 16:43:38,647 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 228 transitions, 2259 flow [2024-06-21 16:43:38,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:38,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:38,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:38,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-21 16:43:38,647 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:38,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:38,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1214274799, now seen corresponding path program 1 times [2024-06-21 16:43:38,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:38,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242713525] [2024-06-21 16:43:38,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:38,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:39,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:39,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:39,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242713525] [2024-06-21 16:43:39,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242713525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:39,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:39,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:39,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746358871] [2024-06-21 16:43:39,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:39,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:39,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:39,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:39,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:39,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:39,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 228 transitions, 2259 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:39,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:39,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:39,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:40,274 INFO L124 PetriNetUnfolderBase]: 3110/5012 cut-off events. [2024-06-21 16:43:40,275 INFO L125 PetriNetUnfolderBase]: For 642699/642699 co-relation queries the response was YES. [2024-06-21 16:43:40,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44379 conditions, 5012 events. 3110/5012 cut-off events. For 642699/642699 co-relation queries the response was YES. Maximal size of possible extension queue 262. Compared 30029 event pairs, 892 based on Foata normal form. 1/4977 useless extension candidates. Maximal degree in co-relation 44283. Up to 4668 conditions per place. [2024-06-21 16:43:40,332 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 208 selfloop transitions, 17 changer transitions 0/248 dead transitions. [2024-06-21 16:43:40,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 207 places, 248 transitions, 2809 flow [2024-06-21 16:43:40,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:40,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:40,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:43:40,333 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-21 16:43:40,334 INFO L175 Difference]: Start difference. First operand has 200 places, 228 transitions, 2259 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:43:40,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 207 places, 248 transitions, 2809 flow [2024-06-21 16:43:40,851 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 203 places, 248 transitions, 2726 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-21 16:43:40,853 INFO L231 Difference]: Finished difference. Result has 204 places, 231 transitions, 2280 flow [2024-06-21 16:43:40,854 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2176, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2280, PETRI_PLACES=204, PETRI_TRANSITIONS=231} [2024-06-21 16:43:40,854 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 159 predicate places. [2024-06-21 16:43:40,854 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 231 transitions, 2280 flow [2024-06-21 16:43:40,854 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:40,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:40,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:40,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-21 16:43:40,855 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:40,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:40,855 INFO L85 PathProgramCache]: Analyzing trace with hash 1214274334, now seen corresponding path program 2 times [2024-06-21 16:43:40,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:40,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300463849] [2024-06-21 16:43:40,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:40,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:40,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:41,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:41,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:41,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300463849] [2024-06-21 16:43:41,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300463849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:41,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:41,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:41,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684384022] [2024-06-21 16:43:41,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:41,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:41,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:41,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:41,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:41,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:41,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 231 transitions, 2280 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:41,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:41,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:41,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:42,601 INFO L124 PetriNetUnfolderBase]: 3156/5076 cut-off events. [2024-06-21 16:43:42,602 INFO L125 PetriNetUnfolderBase]: For 666101/666103 co-relation queries the response was YES. [2024-06-21 16:43:42,637 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45609 conditions, 5076 events. 3156/5076 cut-off events. For 666101/666103 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 30319 event pairs, 888 based on Foata normal form. 4/5044 useless extension candidates. Maximal degree in co-relation 45512. Up to 4577 conditions per place. [2024-06-21 16:43:42,657 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 192 selfloop transitions, 44 changer transitions 0/259 dead transitions. [2024-06-21 16:43:42,657 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 259 transitions, 3264 flow [2024-06-21 16:43:42,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:42,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:42,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:43:42,658 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:43:42,658 INFO L175 Difference]: Start difference. First operand has 204 places, 231 transitions, 2280 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:43:42,659 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 259 transitions, 3264 flow [2024-06-21 16:43:43,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 259 transitions, 3182 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:43:43,313 INFO L231 Difference]: Finished difference. Result has 207 places, 239 transitions, 2480 flow [2024-06-21 16:43:43,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2198, PETRI_DIFFERENCE_MINUEND_PLACES=198, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2480, PETRI_PLACES=207, PETRI_TRANSITIONS=239} [2024-06-21 16:43:43,313 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 162 predicate places. [2024-06-21 16:43:43,313 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 239 transitions, 2480 flow [2024-06-21 16:43:43,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:43,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:43,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:43,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-21 16:43:43,314 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)] === [2024-06-21 16:43:43,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:43,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1214261314, now seen corresponding path program 3 times [2024-06-21 16:43:43,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:43,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906731730] [2024-06-21 16:43:43,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:43,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:43,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:44,047 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:44,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:44,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906731730] [2024-06-21 16:43:44,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906731730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:44,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:44,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:43:44,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29847822] [2024-06-21 16:43:44,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:44,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:43:44,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:44,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:43:44,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:43:44,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:44,123 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 239 transitions, 2480 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:44,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:44,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:44,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:44,945 INFO L124 PetriNetUnfolderBase]: 3160/5082 cut-off events. [2024-06-21 16:43:44,945 INFO L125 PetriNetUnfolderBase]: For 687594/687596 co-relation queries the response was YES. [2024-06-21 16:43:44,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46666 conditions, 5082 events. 3160/5082 cut-off events. For 687594/687596 co-relation queries the response was YES. Maximal size of possible extension queue 268. Compared 30334 event pairs, 888 based on Foata normal form. 4/5050 useless extension candidates. Maximal degree in co-relation 46567. Up to 4584 conditions per place. [2024-06-21 16:43:45,004 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 190 selfloop transitions, 48 changer transitions 0/261 dead transitions. [2024-06-21 16:43:45,004 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 261 transitions, 3233 flow [2024-06-21 16:43:45,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:43:45,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:43:45,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:43:45,005 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:43:45,005 INFO L175 Difference]: Start difference. First operand has 207 places, 239 transitions, 2480 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:43:45,006 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 261 transitions, 3233 flow [2024-06-21 16:43:45,592 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 261 transitions, 3077 flow, removed 59 selfloop flow, removed 4 redundant places. [2024-06-21 16:43:45,600 INFO L231 Difference]: Finished difference. Result has 211 places, 243 transitions, 2524 flow [2024-06-21 16:43:45,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2342, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2524, PETRI_PLACES=211, PETRI_TRANSITIONS=243} [2024-06-21 16:43:45,601 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 166 predicate places. [2024-06-21 16:43:45,601 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 243 transitions, 2524 flow [2024-06-21 16:43:45,601 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:45,601 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:45,601 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:45,601 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-21 16:43:45,602 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:45,602 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:45,602 INFO L85 PathProgramCache]: Analyzing trace with hash 1440718770, now seen corresponding path program 11 times [2024-06-21 16:43:45,602 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:45,602 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400935980] [2024-06-21 16:43:45,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:45,602 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:45,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:46,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:46,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:46,367 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400935980] [2024-06-21 16:43:46,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400935980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:46,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:46,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:46,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416841568] [2024-06-21 16:43:46,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:46,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:46,368 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:46,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:46,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:46,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:46,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 243 transitions, 2524 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:46,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:46,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:46,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:47,630 INFO L124 PetriNetUnfolderBase]: 3315/5329 cut-off events. [2024-06-21 16:43:47,631 INFO L125 PetriNetUnfolderBase]: For 742910/742912 co-relation queries the response was YES. [2024-06-21 16:43:47,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48310 conditions, 5329 events. 3315/5329 cut-off events. For 742910/742912 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 31891 event pairs, 844 based on Foata normal form. 22/5350 useless extension candidates. Maximal degree in co-relation 48209. Up to 4458 conditions per place. [2024-06-21 16:43:47,690 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 200 selfloop transitions, 63 changer transitions 0/280 dead transitions. [2024-06-21 16:43:47,690 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 280 transitions, 3206 flow [2024-06-21 16:43:47,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:47,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:47,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-21 16:43:47,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:43:47,692 INFO L175 Difference]: Start difference. First operand has 211 places, 243 transitions, 2524 flow. Second operand 9 states and 189 transitions. [2024-06-21 16:43:47,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 280 transitions, 3206 flow [2024-06-21 16:43:48,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 280 transitions, 3082 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-21 16:43:48,334 INFO L231 Difference]: Finished difference. Result has 215 places, 244 transitions, 2577 flow [2024-06-21 16:43:48,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2400, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=243, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2577, PETRI_PLACES=215, PETRI_TRANSITIONS=244} [2024-06-21 16:43:48,335 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 170 predicate places. [2024-06-21 16:43:48,335 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 244 transitions, 2577 flow [2024-06-21 16:43:48,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:48,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:48,335 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:48,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-21 16:43:48,336 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:48,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:48,336 INFO L85 PathProgramCache]: Analyzing trace with hash 1440714120, now seen corresponding path program 12 times [2024-06-21 16:43:48,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:48,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460463243] [2024-06-21 16:43:48,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:48,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:48,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:49,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:49,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:49,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460463243] [2024-06-21 16:43:49,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460463243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:49,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:49,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:49,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576874833] [2024-06-21 16:43:49,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:49,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:49,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:49,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:49,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:49,237 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:49,238 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 244 transitions, 2577 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:49,238 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:49,238 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:49,238 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:50,394 INFO L124 PetriNetUnfolderBase]: 3373/5427 cut-off events. [2024-06-21 16:43:50,394 INFO L125 PetriNetUnfolderBase]: For 760276/760278 co-relation queries the response was YES. [2024-06-21 16:43:50,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49324 conditions, 5427 events. 3373/5427 cut-off events. For 760276/760278 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 32630 event pairs, 830 based on Foata normal form. 18/5444 useless extension candidates. Maximal degree in co-relation 49222. Up to 4265 conditions per place. [2024-06-21 16:43:50,453 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 66 changer transitions 0/286 dead transitions. [2024-06-21 16:43:50,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 286 transitions, 3521 flow [2024-06-21 16:43:50,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:50,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:50,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 193 transitions. [2024-06-21 16:43:50,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48737373737373735 [2024-06-21 16:43:50,454 INFO L175 Difference]: Start difference. First operand has 215 places, 244 transitions, 2577 flow. Second operand 9 states and 193 transitions. [2024-06-21 16:43:50,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 286 transitions, 3521 flow [2024-06-21 16:43:51,145 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 216 places, 286 transitions, 3370 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:51,148 INFO L231 Difference]: Finished difference. Result has 217 places, 245 transitions, 2608 flow [2024-06-21 16:43:51,148 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2608, PETRI_PLACES=217, PETRI_TRANSITIONS=245} [2024-06-21 16:43:51,148 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 172 predicate places. [2024-06-21 16:43:51,149 INFO L495 AbstractCegarLoop]: Abstraction has has 217 places, 245 transitions, 2608 flow [2024-06-21 16:43:51,149 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:51,149 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:51,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:51,149 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-21 16:43:51,149 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:51,149 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:51,150 INFO L85 PathProgramCache]: Analyzing trace with hash -1401834906, now seen corresponding path program 13 times [2024-06-21 16:43:51,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:51,150 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811750839] [2024-06-21 16:43:51,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:51,150 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:51,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:52,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:52,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:52,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811750839] [2024-06-21 16:43:52,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811750839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:52,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:52,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:52,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100380052] [2024-06-21 16:43:52,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:52,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:52,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:52,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:52,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:52,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:52,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 217 places, 245 transitions, 2608 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:52,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:52,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:52,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:53,329 INFO L124 PetriNetUnfolderBase]: 3448/5547 cut-off events. [2024-06-21 16:43:53,329 INFO L125 PetriNetUnfolderBase]: For 790127/790129 co-relation queries the response was YES. [2024-06-21 16:43:53,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50226 conditions, 5547 events. 3448/5547 cut-off events. For 790127/790129 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 33573 event pairs, 865 based on Foata normal form. 22/5568 useless extension candidates. Maximal degree in co-relation 50123. Up to 4681 conditions per place. [2024-06-21 16:43:53,391 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 198 selfloop transitions, 66 changer transitions 0/281 dead transitions. [2024-06-21 16:43:53,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 281 transitions, 3292 flow [2024-06-21 16:43:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:53,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:53,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-21 16:43:53,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-06-21 16:43:53,392 INFO L175 Difference]: Start difference. First operand has 217 places, 245 transitions, 2608 flow. Second operand 9 states and 187 transitions. [2024-06-21 16:43:53,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 281 transitions, 3292 flow [2024-06-21 16:43:54,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 281 transitions, 3049 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:54,094 INFO L231 Difference]: Finished difference. Result has 218 places, 246 transitions, 2552 flow [2024-06-21 16:43:54,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2371, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=245, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2552, PETRI_PLACES=218, PETRI_TRANSITIONS=246} [2024-06-21 16:43:54,095 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 173 predicate places. [2024-06-21 16:43:54,095 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 246 transitions, 2552 flow [2024-06-21 16:43:54,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:54,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:54,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:54,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-21 16:43:54,096 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)] === [2024-06-21 16:43:54,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:54,096 INFO L85 PathProgramCache]: Analyzing trace with hash -763416124, now seen corresponding path program 14 times [2024-06-21 16:43:54,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:54,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36165122] [2024-06-21 16:43:54,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:54,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:54,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:54,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:54,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36165122] [2024-06-21 16:43:54,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36165122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:54,965 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:54,965 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:43:54,965 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556324693] [2024-06-21 16:43:54,965 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:54,965 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:43:54,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:54,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:43:54,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:43:55,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:43:55,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 246 transitions, 2552 flow. Second operand has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:55,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:55,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:43:55,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:56,279 INFO L124 PetriNetUnfolderBase]: 3412/5491 cut-off events. [2024-06-21 16:43:56,280 INFO L125 PetriNetUnfolderBase]: For 767168/767170 co-relation queries the response was YES. [2024-06-21 16:43:56,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48246 conditions, 5491 events. 3412/5491 cut-off events. For 767168/767170 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 33205 event pairs, 842 based on Foata normal form. 22/5512 useless extension candidates. Maximal degree in co-relation 48143. Up to 4625 conditions per place. [2024-06-21 16:43:56,332 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 203 selfloop transitions, 62 changer transitions 0/282 dead transitions. [2024-06-21 16:43:56,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 282 transitions, 3196 flow [2024-06-21 16:43:56,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:43:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:43:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-21 16:43:56,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4797979797979798 [2024-06-21 16:43:56,334 INFO L175 Difference]: Start difference. First operand has 218 places, 246 transitions, 2552 flow. Second operand 9 states and 190 transitions. [2024-06-21 16:43:56,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 282 transitions, 3196 flow [2024-06-21 16:43:56,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 282 transitions, 3019 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-21 16:43:56,932 INFO L231 Difference]: Finished difference. Result has 220 places, 246 transitions, 2506 flow [2024-06-21 16:43:56,932 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2375, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2506, PETRI_PLACES=220, PETRI_TRANSITIONS=246} [2024-06-21 16:43:56,933 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 175 predicate places. [2024-06-21 16:43:56,933 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 246 transitions, 2506 flow [2024-06-21 16:43:56,933 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.4) internal successors, (124), 10 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:56,933 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:56,933 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:56,933 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-21 16:43:56,933 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:56,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:56,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1869751151, now seen corresponding path program 3 times [2024-06-21 16:43:56,934 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:56,934 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006110503] [2024-06-21 16:43:56,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:56,934 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:56,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:43:57,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:43:57,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:43:57,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006110503] [2024-06-21 16:43:57,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006110503] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:43:57,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:43:57,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:43:57,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396247623] [2024-06-21 16:43:57,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:43:57,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:43:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:43:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:43:57,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:43:57,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:43:57,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 246 transitions, 2506 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:57,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:43:57,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:43:57,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:43:58,616 INFO L124 PetriNetUnfolderBase]: 3237/5270 cut-off events. [2024-06-21 16:43:58,616 INFO L125 PetriNetUnfolderBase]: For 741329/741329 co-relation queries the response was YES. [2024-06-21 16:43:58,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46992 conditions, 5270 events. 3237/5270 cut-off events. For 741329/741329 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32413 event pairs, 909 based on Foata normal form. 1/5222 useless extension candidates. Maximal degree in co-relation 46888. Up to 4725 conditions per place. [2024-06-21 16:43:58,681 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 204 selfloop transitions, 23 changer transitions 0/262 dead transitions. [2024-06-21 16:43:58,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 262 transitions, 3000 flow [2024-06-21 16:43:58,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:43:58,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:43:58,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2024-06-21 16:43:58,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4707792207792208 [2024-06-21 16:43:58,682 INFO L175 Difference]: Start difference. First operand has 220 places, 246 transitions, 2506 flow. Second operand 7 states and 145 transitions. [2024-06-21 16:43:58,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 262 transitions, 3000 flow [2024-06-21 16:43:59,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 262 transitions, 2839 flow, removed 14 selfloop flow, removed 8 redundant places. [2024-06-21 16:43:59,389 INFO L231 Difference]: Finished difference. Result has 219 places, 246 transitions, 2397 flow [2024-06-21 16:43:59,390 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2345, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2397, PETRI_PLACES=219, PETRI_TRANSITIONS=246} [2024-06-21 16:43:59,390 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-21 16:43:59,398 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 246 transitions, 2397 flow [2024-06-21 16:43:59,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:43:59,398 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:43:59,398 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:43:59,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-21 16:43:59,398 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:43:59,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:43:59,399 INFO L85 PathProgramCache]: Analyzing trace with hash -683989521, now seen corresponding path program 4 times [2024-06-21 16:43:59,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:43:59,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648428580] [2024-06-21 16:43:59,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:43:59,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:43:59,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:00,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:00,017 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648428580] [2024-06-21 16:44:00,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648428580] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:00,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:00,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:00,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924549580] [2024-06-21 16:44:00,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:00,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:00,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:00,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:00,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:00,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:00,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 246 transitions, 2397 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:00,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:00,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:00,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:00,995 INFO L124 PetriNetUnfolderBase]: 3242/5277 cut-off events. [2024-06-21 16:44:00,996 INFO L125 PetriNetUnfolderBase]: For 758668/758668 co-relation queries the response was YES. [2024-06-21 16:44:01,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46960 conditions, 5277 events. 3242/5277 cut-off events. For 758668/758668 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 32436 event pairs, 907 based on Foata normal form. 1/5229 useless extension candidates. Maximal degree in co-relation 46855. Up to 4720 conditions per place. [2024-06-21 16:44:01,055 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 195 selfloop transitions, 32 changer transitions 0/262 dead transitions. [2024-06-21 16:44:01,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 225 places, 262 transitions, 2931 flow [2024-06-21 16:44:01,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:01,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:01,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 16:44:01,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-21 16:44:01,056 INFO L175 Difference]: Start difference. First operand has 219 places, 246 transitions, 2397 flow. Second operand 7 states and 144 transitions. [2024-06-21 16:44:01,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 225 places, 262 transitions, 2931 flow [2024-06-21 16:44:01,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 262 transitions, 2832 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-21 16:44:01,743 INFO L231 Difference]: Finished difference. Result has 219 places, 249 transitions, 2422 flow [2024-06-21 16:44:01,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2298, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=246, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2422, PETRI_PLACES=219, PETRI_TRANSITIONS=249} [2024-06-21 16:44:01,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 174 predicate places. [2024-06-21 16:44:01,744 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 249 transitions, 2422 flow [2024-06-21 16:44:01,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:01,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:01,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:01,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-21 16:44:01,745 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)] === [2024-06-21 16:44:01,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:01,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1604580992, now seen corresponding path program 1 times [2024-06-21 16:44:01,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:01,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131397848] [2024-06-21 16:44:01,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:01,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:01,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:02,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:02,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:02,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131397848] [2024-06-21 16:44:02,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131397848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:02,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:02,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:02,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608231688] [2024-06-21 16:44:02,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:02,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:02,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:02,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:02,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:02,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:02,893 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 249 transitions, 2422 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:02,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:02,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:02,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:04,055 INFO L124 PetriNetUnfolderBase]: 3427/5490 cut-off events. [2024-06-21 16:44:04,056 INFO L125 PetriNetUnfolderBase]: For 784754/784754 co-relation queries the response was YES. [2024-06-21 16:44:04,097 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48355 conditions, 5490 events. 3427/5490 cut-off events. For 784754/784754 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33068 event pairs, 880 based on Foata normal form. 4/5493 useless extension candidates. Maximal degree in co-relation 48249. Up to 4752 conditions per place. [2024-06-21 16:44:04,121 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 198 selfloop transitions, 74 changer transitions 0/289 dead transitions. [2024-06-21 16:44:04,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 289 transitions, 3138 flow [2024-06-21 16:44:04,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:04,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:04,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:44:04,122 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-21 16:44:04,123 INFO L175 Difference]: Start difference. First operand has 219 places, 249 transitions, 2422 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:44:04,123 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 289 transitions, 3138 flow [2024-06-21 16:44:04,992 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 289 transitions, 3046 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:04,996 INFO L231 Difference]: Finished difference. Result has 225 places, 254 transitions, 2575 flow [2024-06-21 16:44:04,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2330, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2575, PETRI_PLACES=225, PETRI_TRANSITIONS=254} [2024-06-21 16:44:04,997 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 180 predicate places. [2024-06-21 16:44:04,997 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 254 transitions, 2575 flow [2024-06-21 16:44:04,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:04,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:04,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:04,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-21 16:44:04,998 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)] === [2024-06-21 16:44:04,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:04,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1574254046, now seen corresponding path program 2 times [2024-06-21 16:44:04,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:04,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472283296] [2024-06-21 16:44:04,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:04,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:05,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:06,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:06,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:06,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472283296] [2024-06-21 16:44:06,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472283296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:06,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:06,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:06,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110878664] [2024-06-21 16:44:06,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:06,326 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:06,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:06,326 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:06,326 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:06,502 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:06,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 254 transitions, 2575 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:06,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:06,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:06,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:07,888 INFO L124 PetriNetUnfolderBase]: 3444/5513 cut-off events. [2024-06-21 16:44:07,888 INFO L125 PetriNetUnfolderBase]: For 809414/809414 co-relation queries the response was YES. [2024-06-21 16:44:07,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49622 conditions, 5513 events. 3444/5513 cut-off events. For 809414/809414 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 33190 event pairs, 879 based on Foata normal form. 4/5516 useless extension candidates. Maximal degree in co-relation 49514. Up to 4779 conditions per place. [2024-06-21 16:44:07,948 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 200 selfloop transitions, 77 changer transitions 0/294 dead transitions. [2024-06-21 16:44:07,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 294 transitions, 3317 flow [2024-06-21 16:44:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:07,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:44:07,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-21 16:44:07,949 INFO L175 Difference]: Start difference. First operand has 225 places, 254 transitions, 2575 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:44:07,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 294 transitions, 3317 flow [2024-06-21 16:44:08,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 294 transitions, 3112 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:44:08,601 INFO L231 Difference]: Finished difference. Result has 229 places, 259 transitions, 2631 flow [2024-06-21 16:44:08,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2374, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2631, PETRI_PLACES=229, PETRI_TRANSITIONS=259} [2024-06-21 16:44:08,602 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 184 predicate places. [2024-06-21 16:44:08,602 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 259 transitions, 2631 flow [2024-06-21 16:44:08,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:08,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:08,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:08,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-21 16:44:08,603 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:08,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:08,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1220935134, now seen corresponding path program 3 times [2024-06-21 16:44:08,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:08,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636945453] [2024-06-21 16:44:08,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:08,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:08,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:09,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:09,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:09,623 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636945453] [2024-06-21 16:44:09,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636945453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:09,623 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:09,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:09,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008486354] [2024-06-21 16:44:09,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:09,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:09,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:09,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:09,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:09,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:09,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 259 transitions, 2631 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:09,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:09,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:09,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:11,242 INFO L124 PetriNetUnfolderBase]: 3472/5564 cut-off events. [2024-06-21 16:44:11,243 INFO L125 PetriNetUnfolderBase]: For 832665/832665 co-relation queries the response was YES. [2024-06-21 16:44:11,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50593 conditions, 5564 events. 3472/5564 cut-off events. For 832665/832665 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 33584 event pairs, 879 based on Foata normal form. 4/5567 useless extension candidates. Maximal degree in co-relation 50483. Up to 4813 conditions per place. [2024-06-21 16:44:11,306 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 197 selfloop transitions, 89 changer transitions 0/303 dead transitions. [2024-06-21 16:44:11,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 3445 flow [2024-06-21 16:44:11,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:11,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:11,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:44:11,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-21 16:44:11,307 INFO L175 Difference]: Start difference. First operand has 229 places, 259 transitions, 2631 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:44:11,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 3445 flow [2024-06-21 16:44:12,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 303 transitions, 3216 flow, removed 32 selfloop flow, removed 7 redundant places. [2024-06-21 16:44:12,109 INFO L231 Difference]: Finished difference. Result has 233 places, 270 transitions, 2765 flow [2024-06-21 16:44:12,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2418, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2765, PETRI_PLACES=233, PETRI_TRANSITIONS=270} [2024-06-21 16:44:12,110 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 188 predicate places. [2024-06-21 16:44:12,110 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 270 transitions, 2765 flow [2024-06-21 16:44:12,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:12,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:12,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:12,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-21 16:44:12,110 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:12,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:12,111 INFO L85 PathProgramCache]: Analyzing trace with hash 935835264, now seen corresponding path program 4 times [2024-06-21 16:44:12,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:12,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140487917] [2024-06-21 16:44:12,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:12,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:12,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:13,102 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:13,102 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:13,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140487917] [2024-06-21 16:44:13,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140487917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:13,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:13,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:13,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159558062] [2024-06-21 16:44:13,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:13,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:13,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:13,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:13,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:13,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:13,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 270 transitions, 2765 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:13,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:13,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:13,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:14,599 INFO L124 PetriNetUnfolderBase]: 3464/5546 cut-off events. [2024-06-21 16:44:14,599 INFO L125 PetriNetUnfolderBase]: For 845377/845377 co-relation queries the response was YES. [2024-06-21 16:44:14,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50837 conditions, 5546 events. 3464/5546 cut-off events. For 845377/845377 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 33415 event pairs, 877 based on Foata normal form. 4/5549 useless extension candidates. Maximal degree in co-relation 50725. Up to 4801 conditions per place. [2024-06-21 16:44:14,668 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 202 selfloop transitions, 87 changer transitions 0/306 dead transitions. [2024-06-21 16:44:14,669 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 306 transitions, 3518 flow [2024-06-21 16:44:14,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:14,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:14,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:44:14,670 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-21 16:44:14,670 INFO L175 Difference]: Start difference. First operand has 233 places, 270 transitions, 2765 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:44:14,670 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 306 transitions, 3518 flow [2024-06-21 16:44:15,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 306 transitions, 3309 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:15,505 INFO L231 Difference]: Finished difference. Result has 239 places, 273 transitions, 2842 flow [2024-06-21 16:44:15,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2842, PETRI_PLACES=239, PETRI_TRANSITIONS=273} [2024-06-21 16:44:15,506 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 194 predicate places. [2024-06-21 16:44:15,506 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 273 transitions, 2842 flow [2024-06-21 16:44:15,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:15,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:15,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:15,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-21 16:44:15,507 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:15,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:15,507 INFO L85 PathProgramCache]: Analyzing trace with hash 1231410654, now seen corresponding path program 5 times [2024-06-21 16:44:15,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:15,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156868468] [2024-06-21 16:44:15,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:15,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:15,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:16,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:16,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156868468] [2024-06-21 16:44:16,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156868468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:16,588 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:16,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:44:16,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422531154] [2024-06-21 16:44:16,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:16,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:44:16,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:16,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:44:16,589 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:44:16,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:16,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 273 transitions, 2842 flow. Second operand has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:16,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:16,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:16,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:17,905 INFO L124 PetriNetUnfolderBase]: 3497/5621 cut-off events. [2024-06-21 16:44:17,905 INFO L125 PetriNetUnfolderBase]: For 854858/854858 co-relation queries the response was YES. [2024-06-21 16:44:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50234 conditions, 5621 events. 3497/5621 cut-off events. For 854858/854858 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34192 event pairs, 782 based on Foata normal form. 4/5624 useless extension candidates. Maximal degree in co-relation 50120. Up to 4655 conditions per place. [2024-06-21 16:44:17,967 INFO L140 encePairwiseOnDemand]: 31/44 looper letters, 195 selfloop transitions, 101 changer transitions 0/313 dead transitions. [2024-06-21 16:44:17,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 313 transitions, 3620 flow [2024-06-21 16:44:17,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:44:17,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:44:17,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-21 16:44:17,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:44:17,969 INFO L175 Difference]: Start difference. First operand has 239 places, 273 transitions, 2842 flow. Second operand 10 states and 210 transitions. [2024-06-21 16:44:17,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 313 transitions, 3620 flow [2024-06-21 16:44:18,798 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 313 transitions, 3377 flow, removed 37 selfloop flow, removed 7 redundant places. [2024-06-21 16:44:18,801 INFO L231 Difference]: Finished difference. Result has 243 places, 276 transitions, 2909 flow [2024-06-21 16:44:18,808 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2599, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2909, PETRI_PLACES=243, PETRI_TRANSITIONS=276} [2024-06-21 16:44:18,809 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-21 16:44:18,809 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 276 transitions, 2909 flow [2024-06-21 16:44:18,809 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.272727272727273) internal successors, (135), 11 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:18,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:18,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:18,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-21 16:44:18,809 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)] === [2024-06-21 16:44:18,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:18,810 INFO L85 PathProgramCache]: Analyzing trace with hash 1141876271, now seen corresponding path program 5 times [2024-06-21 16:44:18,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:18,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012444895] [2024-06-21 16:44:18,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:18,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:18,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:19,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:19,493 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:19,493 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012444895] [2024-06-21 16:44:19,493 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1012444895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:19,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:19,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:19,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465898585] [2024-06-21 16:44:19,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:19,494 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:19,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:19,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:19,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:19,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:19,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 276 transitions, 2909 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:19,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:19,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:19,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:20,492 INFO L124 PetriNetUnfolderBase]: 3331/5451 cut-off events. [2024-06-21 16:44:20,492 INFO L125 PetriNetUnfolderBase]: For 869094/869096 co-relation queries the response was YES. [2024-06-21 16:44:20,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49739 conditions, 5451 events. 3331/5451 cut-off events. For 869094/869096 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 34006 event pairs, 847 based on Foata normal form. 4/5406 useless extension candidates. Maximal degree in co-relation 49623. Up to 4810 conditions per place. [2024-06-21 16:44:20,557 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 204 selfloop transitions, 51 changer transitions 0/290 dead transitions. [2024-06-21 16:44:20,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 290 transitions, 3661 flow [2024-06-21 16:44:20,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:20,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:20,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-21 16:44:20,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4675324675324675 [2024-06-21 16:44:20,559 INFO L175 Difference]: Start difference. First operand has 243 places, 276 transitions, 2909 flow. Second operand 7 states and 144 transitions. [2024-06-21 16:44:20,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 290 transitions, 3661 flow [2024-06-21 16:44:21,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 290 transitions, 3423 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-21 16:44:21,432 INFO L231 Difference]: Finished difference. Result has 243 places, 279 transitions, 2837 flow [2024-06-21 16:44:21,432 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=227, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2837, PETRI_PLACES=243, PETRI_TRANSITIONS=279} [2024-06-21 16:44:21,432 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 198 predicate places. [2024-06-21 16:44:21,432 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 279 transitions, 2837 flow [2024-06-21 16:44:21,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:21,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:21,433 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:21,433 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-21 16:44:21,433 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)] === [2024-06-21 16:44:21,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:21,433 INFO L85 PathProgramCache]: Analyzing trace with hash 1142026001, now seen corresponding path program 6 times [2024-06-21 16:44:21,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:21,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644218831] [2024-06-21 16:44:21,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:21,434 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:21,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:22,196 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:22,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:22,196 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644218831] [2024-06-21 16:44:22,196 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644218831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:22,196 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:22,196 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-21 16:44:22,196 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19464114] [2024-06-21 16:44:22,196 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:22,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-21 16:44:22,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:22,197 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-21 16:44:22,197 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-21 16:44:22,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:22,282 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 279 transitions, 2837 flow. Second operand has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:22,282 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:22,282 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:22,282 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:23,176 INFO L124 PetriNetUnfolderBase]: 3326/5435 cut-off events. [2024-06-21 16:44:23,176 INFO L125 PetriNetUnfolderBase]: For 882726/882728 co-relation queries the response was YES. [2024-06-21 16:44:23,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49326 conditions, 5435 events. 3326/5435 cut-off events. For 882726/882728 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 33755 event pairs, 837 based on Foata normal form. 3/5389 useless extension candidates. Maximal degree in co-relation 49209. Up to 4805 conditions per place. [2024-06-21 16:44:23,238 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 199 selfloop transitions, 55 changer transitions 0/289 dead transitions. [2024-06-21 16:44:23,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 289 transitions, 3369 flow [2024-06-21 16:44:23,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-21 16:44:23,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-21 16:44:23,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-21 16:44:23,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-06-21 16:44:23,240 INFO L175 Difference]: Start difference. First operand has 243 places, 279 transitions, 2837 flow. Second operand 7 states and 142 transitions. [2024-06-21 16:44:23,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 289 transitions, 3369 flow [2024-06-21 16:44:24,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 289 transitions, 3219 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:24,065 INFO L231 Difference]: Finished difference. Result has 246 places, 279 transitions, 2803 flow [2024-06-21 16:44:24,066 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2687, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2803, PETRI_PLACES=246, PETRI_TRANSITIONS=279} [2024-06-21 16:44:24,066 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 201 predicate places. [2024-06-21 16:44:24,066 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 279 transitions, 2803 flow [2024-06-21 16:44:24,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 13.75) internal successors, (110), 8 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:24,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:24,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:24,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-21 16:44:24,067 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:24,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:24,067 INFO L85 PathProgramCache]: Analyzing trace with hash 918653896, now seen corresponding path program 4 times [2024-06-21 16:44:24,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901293244] [2024-06-21 16:44:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:24,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:24,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:24,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901293244] [2024-06-21 16:44:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901293244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:24,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:24,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:24,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237236229] [2024-06-21 16:44:24,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:24,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:24,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:24,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:24,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:24,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 279 transitions, 2803 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:24,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:24,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:24,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:25,943 INFO L124 PetriNetUnfolderBase]: 3442/5572 cut-off events. [2024-06-21 16:44:25,944 INFO L125 PetriNetUnfolderBase]: For 912699/912701 co-relation queries the response was YES. [2024-06-21 16:44:25,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50601 conditions, 5572 events. 3442/5572 cut-off events. For 912699/912701 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34336 event pairs, 868 based on Foata normal form. 4/5527 useless extension candidates. Maximal degree in co-relation 50483. Up to 4948 conditions per place. [2024-06-21 16:44:26,011 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 207 selfloop transitions, 77 changer transitions 0/307 dead transitions. [2024-06-21 16:44:26,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 253 places, 307 transitions, 4259 flow [2024-06-21 16:44:26,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:26,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:26,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:44:26,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:44:26,013 INFO L175 Difference]: Start difference. First operand has 246 places, 279 transitions, 2803 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:44:26,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 253 places, 307 transitions, 4259 flow [2024-06-21 16:44:26,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 307 transitions, 4111 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-21 16:44:26,680 INFO L231 Difference]: Finished difference. Result has 248 places, 290 transitions, 3083 flow [2024-06-21 16:44:26,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2655, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3083, PETRI_PLACES=248, PETRI_TRANSITIONS=290} [2024-06-21 16:44:26,681 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 203 predicate places. [2024-06-21 16:44:26,681 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 290 transitions, 3083 flow [2024-06-21 16:44:26,681 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:26,681 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:26,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:26,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-21 16:44:26,681 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:26,682 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:26,682 INFO L85 PathProgramCache]: Analyzing trace with hash 918654361, now seen corresponding path program 2 times [2024-06-21 16:44:26,682 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:26,682 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26709138] [2024-06-21 16:44:26,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:26,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:26,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:27,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:27,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26709138] [2024-06-21 16:44:27,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26709138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:27,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:27,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278784877] [2024-06-21 16:44:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:27,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:27,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:27,640 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:27,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 290 transitions, 3083 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:27,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:27,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:27,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:28,622 INFO L124 PetriNetUnfolderBase]: 3447/5578 cut-off events. [2024-06-21 16:44:28,622 INFO L125 PetriNetUnfolderBase]: For 937827/937833 co-relation queries the response was YES. [2024-06-21 16:44:28,668 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51691 conditions, 5578 events. 3447/5578 cut-off events. For 937827/937833 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34308 event pairs, 843 based on Foata normal form. 7/5537 useless extension candidates. Maximal degree in co-relation 51571. Up to 5170 conditions per place. [2024-06-21 16:44:28,690 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 253 selfloop transitions, 35 changer transitions 0/311 dead transitions. [2024-06-21 16:44:28,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 311 transitions, 4035 flow [2024-06-21 16:44:28,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:28,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:28,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-21 16:44:28,692 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42613636363636365 [2024-06-21 16:44:28,692 INFO L175 Difference]: Start difference. First operand has 248 places, 290 transitions, 3083 flow. Second operand 8 states and 150 transitions. [2024-06-21 16:44:28,692 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 311 transitions, 4035 flow [2024-06-21 16:44:29,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 311 transitions, 3801 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:29,515 INFO L231 Difference]: Finished difference. Result has 253 places, 299 transitions, 3131 flow [2024-06-21 16:44:29,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=2849, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3131, PETRI_PLACES=253, PETRI_TRANSITIONS=299} [2024-06-21 16:44:29,515 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 208 predicate places. [2024-06-21 16:44:29,515 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 299 transitions, 3131 flow [2024-06-21 16:44:29,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:29,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:29,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:29,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-21 16:44:29,516 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:29,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:29,516 INFO L85 PathProgramCache]: Analyzing trace with hash 1157123311, now seen corresponding path program 3 times [2024-06-21 16:44:29,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:29,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274053688] [2024-06-21 16:44:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:29,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:29,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:30,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:30,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:30,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274053688] [2024-06-21 16:44:30,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274053688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:30,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:30,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:30,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039935199] [2024-06-21 16:44:30,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:30,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:30,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:30,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:30,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:30,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:30,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 299 transitions, 3131 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:30,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:30,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:30,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:31,370 INFO L124 PetriNetUnfolderBase]: 3452/5585 cut-off events. [2024-06-21 16:44:31,371 INFO L125 PetriNetUnfolderBase]: For 957607/957613 co-relation queries the response was YES. [2024-06-21 16:44:31,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51637 conditions, 5585 events. 3452/5585 cut-off events. For 957607/957613 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34335 event pairs, 843 based on Foata normal form. 7/5544 useless extension candidates. Maximal degree in co-relation 51515. Up to 5176 conditions per place. [2024-06-21 16:44:31,433 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 250 selfloop transitions, 41 changer transitions 0/314 dead transitions. [2024-06-21 16:44:31,433 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 314 transitions, 4001 flow [2024-06-21 16:44:31,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:31,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:31,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:44:31,434 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 16:44:31,434 INFO L175 Difference]: Start difference. First operand has 253 places, 299 transitions, 3131 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:44:31,434 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 314 transitions, 4001 flow [2024-06-21 16:44:32,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 314 transitions, 3895 flow, removed 47 selfloop flow, removed 3 redundant places. [2024-06-21 16:44:32,096 INFO L231 Difference]: Finished difference. Result has 258 places, 302 transitions, 3203 flow [2024-06-21 16:44:32,096 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3033, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3203, PETRI_PLACES=258, PETRI_TRANSITIONS=302} [2024-06-21 16:44:32,097 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 213 predicate places. [2024-06-21 16:44:32,097 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 302 transitions, 3203 flow [2024-06-21 16:44:32,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:32,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:32,097 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:32,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-21 16:44:32,097 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:32,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:32,098 INFO L85 PathProgramCache]: Analyzing trace with hash 1141872706, now seen corresponding path program 5 times [2024-06-21 16:44:32,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:32,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375665553] [2024-06-21 16:44:32,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:32,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:32,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:32,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:32,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:32,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375665553] [2024-06-21 16:44:32,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375665553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:32,858 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:32,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:32,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326119090] [2024-06-21 16:44:32,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:32,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:32,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:32,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:32,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:32,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:32,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 302 transitions, 3203 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:32,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:32,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:32,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:33,993 INFO L124 PetriNetUnfolderBase]: 3462/5600 cut-off events. [2024-06-21 16:44:33,993 INFO L125 PetriNetUnfolderBase]: For 980204/980206 co-relation queries the response was YES. [2024-06-21 16:44:34,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51978 conditions, 5600 events. 3462/5600 cut-off events. For 980204/980206 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34407 event pairs, 867 based on Foata normal form. 4/5555 useless extension candidates. Maximal degree in co-relation 51854. Up to 4975 conditions per place. [2024-06-21 16:44:34,063 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 214 selfloop transitions, 88 changer transitions 0/325 dead transitions. [2024-06-21 16:44:34,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 325 transitions, 4564 flow [2024-06-21 16:44:34,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:34,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:34,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:44:34,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:44:34,075 INFO L175 Difference]: Start difference. First operand has 258 places, 302 transitions, 3203 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:44:34,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 325 transitions, 4564 flow [2024-06-21 16:44:34,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 325 transitions, 4426 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-21 16:44:34,981 INFO L231 Difference]: Finished difference. Result has 262 places, 311 transitions, 3492 flow [2024-06-21 16:44:34,981 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3065, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=302, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3492, PETRI_PLACES=262, PETRI_TRANSITIONS=311} [2024-06-21 16:44:34,984 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 217 predicate places. [2024-06-21 16:44:34,984 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 311 transitions, 3492 flow [2024-06-21 16:44:34,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:34,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:34,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:34,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-21 16:44:34,985 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:34,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:34,985 INFO L85 PathProgramCache]: Analyzing trace with hash 1156617856, now seen corresponding path program 6 times [2024-06-21 16:44:34,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:34,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469570669] [2024-06-21 16:44:34,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:34,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:35,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:35,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:35,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469570669] [2024-06-21 16:44:35,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469570669] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:35,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:35,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:35,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399935042] [2024-06-21 16:44:35,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:35,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:35,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:35,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:35,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:35,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:35,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 311 transitions, 3492 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:35,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:35,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:35,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:36,978 INFO L124 PetriNetUnfolderBase]: 3458/5596 cut-off events. [2024-06-21 16:44:36,978 INFO L125 PetriNetUnfolderBase]: For 997406/997408 co-relation queries the response was YES. [2024-06-21 16:44:37,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52422 conditions, 5596 events. 3458/5596 cut-off events. For 997406/997408 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34417 event pairs, 867 based on Foata normal form. 4/5551 useless extension candidates. Maximal degree in co-relation 52296. Up to 4973 conditions per place. [2024-06-21 16:44:37,045 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 212 selfloop transitions, 89 changer transitions 0/324 dead transitions. [2024-06-21 16:44:37,045 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 324 transitions, 4472 flow [2024-06-21 16:44:37,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:37,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:37,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:44:37,046 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:44:37,046 INFO L175 Difference]: Start difference. First operand has 262 places, 311 transitions, 3492 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:44:37,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 324 transitions, 4472 flow [2024-06-21 16:44:37,880 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 324 transitions, 4277 flow, removed 68 selfloop flow, removed 3 redundant places. [2024-06-21 16:44:37,884 INFO L231 Difference]: Finished difference. Result has 267 places, 311 transitions, 3483 flow [2024-06-21 16:44:37,884 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3483, PETRI_PLACES=267, PETRI_TRANSITIONS=311} [2024-06-21 16:44:37,884 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-21 16:44:37,885 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 311 transitions, 3483 flow [2024-06-21 16:44:37,885 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:37,885 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:37,885 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:37,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-21 16:44:37,885 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:37,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:37,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1156618321, now seen corresponding path program 4 times [2024-06-21 16:44:37,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:37,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170141618] [2024-06-21 16:44:37,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:37,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:37,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:38,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:38,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:38,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170141618] [2024-06-21 16:44:38,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170141618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:38,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:38,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:38,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309762620] [2024-06-21 16:44:38,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:38,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:38,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:38,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:38,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:38,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:38,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 311 transitions, 3483 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:38,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:38,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:38,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:39,896 INFO L124 PetriNetUnfolderBase]: 3455/5591 cut-off events. [2024-06-21 16:44:39,896 INFO L125 PetriNetUnfolderBase]: For 1010052/1010056 co-relation queries the response was YES. [2024-06-21 16:44:39,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52523 conditions, 5591 events. 3455/5591 cut-off events. For 1010052/1010056 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 34389 event pairs, 842 based on Foata normal form. 5/5548 useless extension candidates. Maximal degree in co-relation 52395. Up to 5182 conditions per place. [2024-06-21 16:44:39,968 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 260 selfloop transitions, 39 changer transitions 0/322 dead transitions. [2024-06-21 16:44:39,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 322 transitions, 4107 flow [2024-06-21 16:44:39,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:39,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:39,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-21 16:44:39,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42045454545454547 [2024-06-21 16:44:39,969 INFO L175 Difference]: Start difference. First operand has 267 places, 311 transitions, 3483 flow. Second operand 8 states and 148 transitions. [2024-06-21 16:44:39,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 322 transitions, 4107 flow [2024-06-21 16:44:40,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 322 transitions, 3805 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-21 16:44:40,882 INFO L231 Difference]: Finished difference. Result has 267 places, 311 transitions, 3265 flow [2024-06-21 16:44:40,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3181, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3265, PETRI_PLACES=267, PETRI_TRANSITIONS=311} [2024-06-21 16:44:40,882 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 222 predicate places. [2024-06-21 16:44:40,883 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 311 transitions, 3265 flow [2024-06-21 16:44:40,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:40,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:40,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:40,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-21 16:44:40,889 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:40,889 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:40,889 INFO L85 PathProgramCache]: Analyzing trace with hash -1884584657, now seen corresponding path program 1 times [2024-06-21 16:44:40,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:40,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660735903] [2024-06-21 16:44:40,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:40,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:41,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:41,627 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:41,627 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660735903] [2024-06-21 16:44:41,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1660735903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:41,627 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:41,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:41,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379701878] [2024-06-21 16:44:41,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:41,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:41,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:41,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:41,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:41,744 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:41,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 311 transitions, 3265 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:41,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:41,745 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:41,745 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:42,991 INFO L124 PetriNetUnfolderBase]: 3427/5607 cut-off events. [2024-06-21 16:44:42,992 INFO L125 PetriNetUnfolderBase]: For 1040252/1040252 co-relation queries the response was YES. [2024-06-21 16:44:43,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52312 conditions, 5607 events. 3427/5607 cut-off events. For 1040252/1040252 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34786 event pairs, 805 based on Foata normal form. 2/5609 useless extension candidates. Maximal degree in co-relation 52184. Up to 5084 conditions per place. [2024-06-21 16:44:43,074 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 290 selfloop transitions, 17 changer transitions 0/335 dead transitions. [2024-06-21 16:44:43,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 335 transitions, 3991 flow [2024-06-21 16:44:43,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:43,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:43,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:44:43,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:44:43,075 INFO L175 Difference]: Start difference. First operand has 267 places, 311 transitions, 3265 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:44:43,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 335 transitions, 3991 flow [2024-06-21 16:44:44,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 335 transitions, 3921 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:44,220 INFO L231 Difference]: Finished difference. Result has 269 places, 314 transitions, 3299 flow [2024-06-21 16:44:44,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3195, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3299, PETRI_PLACES=269, PETRI_TRANSITIONS=314} [2024-06-21 16:44:44,221 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 224 predicate places. [2024-06-21 16:44:44,221 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 314 transitions, 3299 flow [2024-06-21 16:44:44,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:44,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:44,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:44,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-21 16:44:44,222 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:44,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:44,222 INFO L85 PathProgramCache]: Analyzing trace with hash -47066424, now seen corresponding path program 1 times [2024-06-21 16:44:44,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:44,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138026487] [2024-06-21 16:44:44,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:44,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:44,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:45,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:45,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:45,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138026487] [2024-06-21 16:44:45,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138026487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:45,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:45,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:45,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963596620] [2024-06-21 16:44:45,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:45,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:45,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:45,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:45,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:45,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 314 transitions, 3299 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:45,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:45,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:45,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:46,310 INFO L124 PetriNetUnfolderBase]: 3523/5705 cut-off events. [2024-06-21 16:44:46,310 INFO L125 PetriNetUnfolderBase]: For 1054991/1054991 co-relation queries the response was YES. [2024-06-21 16:44:46,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53478 conditions, 5705 events. 3523/5705 cut-off events. For 1054991/1054991 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 34860 event pairs, 836 based on Foata normal form. 1/5706 useless extension candidates. Maximal degree in co-relation 53349. Up to 5337 conditions per place. [2024-06-21 16:44:46,374 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 306 selfloop transitions, 17 changer transitions 0/334 dead transitions. [2024-06-21 16:44:46,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 334 transitions, 4049 flow [2024-06-21 16:44:46,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:46,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:46,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:44:46,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-21 16:44:46,375 INFO L175 Difference]: Start difference. First operand has 269 places, 314 transitions, 3299 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:44:46,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 334 transitions, 4049 flow [2024-06-21 16:44:47,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 334 transitions, 3967 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:47,336 INFO L231 Difference]: Finished difference. Result has 271 places, 317 transitions, 3325 flow [2024-06-21 16:44:47,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3217, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=314, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3325, PETRI_PLACES=271, PETRI_TRANSITIONS=317} [2024-06-21 16:44:47,336 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 226 predicate places. [2024-06-21 16:44:47,336 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 317 transitions, 3325 flow [2024-06-21 16:44:47,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:47,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:47,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:47,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-21 16:44:47,337 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:47,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:47,337 INFO L85 PathProgramCache]: Analyzing trace with hash -1884434927, now seen corresponding path program 2 times [2024-06-21 16:44:47,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:47,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680612223] [2024-06-21 16:44:47,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:47,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:47,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:48,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:48,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:48,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680612223] [2024-06-21 16:44:48,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680612223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:48,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:48,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:48,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527432190] [2024-06-21 16:44:48,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:48,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:48,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:48,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:48,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:48,126 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:48,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 317 transitions, 3325 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:48,127 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:48,127 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:48,127 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:49,248 INFO L124 PetriNetUnfolderBase]: 3452/5640 cut-off events. [2024-06-21 16:44:49,249 INFO L125 PetriNetUnfolderBase]: For 1085107/1085107 co-relation queries the response was YES. [2024-06-21 16:44:49,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53713 conditions, 5640 events. 3452/5640 cut-off events. For 1085107/1085107 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34945 event pairs, 804 based on Foata normal form. 2/5642 useless extension candidates. Maximal degree in co-relation 53583. Up to 5104 conditions per place. [2024-06-21 16:44:49,322 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 288 selfloop transitions, 22 changer transitions 0/339 dead transitions. [2024-06-21 16:44:49,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 339 transitions, 4061 flow [2024-06-21 16:44:49,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:49,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:49,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:44:49,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:44:49,324 INFO L175 Difference]: Start difference. First operand has 271 places, 317 transitions, 3325 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:44:49,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 339 transitions, 4061 flow [2024-06-21 16:44:50,616 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 339 transitions, 3975 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:50,619 INFO L231 Difference]: Finished difference. Result has 273 places, 320 transitions, 3361 flow [2024-06-21 16:44:50,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3239, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3361, PETRI_PLACES=273, PETRI_TRANSITIONS=320} [2024-06-21 16:44:50,620 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 228 predicate places. [2024-06-21 16:44:50,620 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 320 transitions, 3361 flow [2024-06-21 16:44:50,620 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:50,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:50,620 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:50,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-21 16:44:50,620 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:50,621 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:50,621 INFO L85 PathProgramCache]: Analyzing trace with hash -1878870520, now seen corresponding path program 2 times [2024-06-21 16:44:50,621 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:50,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379527478] [2024-06-21 16:44:50,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:50,622 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:50,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:51,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:51,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:51,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379527478] [2024-06-21 16:44:51,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379527478] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:51,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:51,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:51,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945453828] [2024-06-21 16:44:51,382 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:51,382 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:51,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:51,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:51,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:51,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:51,499 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 320 transitions, 3361 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:51,499 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:51,499 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:51,499 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:52,650 INFO L124 PetriNetUnfolderBase]: 3546/5739 cut-off events. [2024-06-21 16:44:52,651 INFO L125 PetriNetUnfolderBase]: For 1105100/1105100 co-relation queries the response was YES. [2024-06-21 16:44:52,702 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55019 conditions, 5739 events. 3546/5739 cut-off events. For 1105100/1105100 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35169 event pairs, 836 based on Foata normal form. 1/5740 useless extension candidates. Maximal degree in co-relation 54888. Up to 5353 conditions per place. [2024-06-21 16:44:52,726 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 301 selfloop transitions, 29 changer transitions 0/341 dead transitions. [2024-06-21 16:44:52,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 341 transitions, 4381 flow [2024-06-21 16:44:52,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:52,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:52,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:44:52,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-21 16:44:52,727 INFO L175 Difference]: Start difference. First operand has 273 places, 320 transitions, 3361 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:44:52,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 341 transitions, 4381 flow [2024-06-21 16:44:53,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 341 transitions, 4281 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:44:53,942 INFO L231 Difference]: Finished difference. Result has 275 places, 326 transitions, 3471 flow [2024-06-21 16:44:53,943 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3261, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3471, PETRI_PLACES=275, PETRI_TRANSITIONS=326} [2024-06-21 16:44:53,943 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 230 predicate places. [2024-06-21 16:44:53,943 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 326 transitions, 3471 flow [2024-06-21 16:44:53,943 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:53,943 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:53,943 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:53,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-21 16:44:53,944 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:53,944 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:53,944 INFO L85 PathProgramCache]: Analyzing trace with hash -683981585, now seen corresponding path program 3 times [2024-06-21 16:44:53,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:53,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628587643] [2024-06-21 16:44:53,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:53,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:53,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:54,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:54,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:54,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628587643] [2024-06-21 16:44:54,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628587643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:54,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:54,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:54,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452366551] [2024-06-21 16:44:54,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:54,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:54,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:54,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:54,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:54,836 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:44:54,837 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 326 transitions, 3471 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:54,837 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:54,837 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:44:54,837 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:55,878 INFO L124 PetriNetUnfolderBase]: 3475/5674 cut-off events. [2024-06-21 16:44:55,878 INFO L125 PetriNetUnfolderBase]: For 1138086/1138086 co-relation queries the response was YES. [2024-06-21 16:44:55,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55253 conditions, 5674 events. 3475/5674 cut-off events. For 1138086/1138086 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35127 event pairs, 804 based on Foata normal form. 2/5676 useless extension candidates. Maximal degree in co-relation 55121. Up to 5119 conditions per place. [2024-06-21 16:44:55,956 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 285 selfloop transitions, 29 changer transitions 0/345 dead transitions. [2024-06-21 16:44:55,957 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 345 transitions, 4215 flow [2024-06-21 16:44:55,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:55,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:55,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:44:55,958 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:44:55,958 INFO L175 Difference]: Start difference. First operand has 275 places, 326 transitions, 3471 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:44:55,958 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 345 transitions, 4215 flow [2024-06-21 16:44:56,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 345 transitions, 4115 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 16:44:56,879 INFO L231 Difference]: Finished difference. Result has 279 places, 329 transitions, 3515 flow [2024-06-21 16:44:56,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3371, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3515, PETRI_PLACES=279, PETRI_TRANSITIONS=329} [2024-06-21 16:44:56,880 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 234 predicate places. [2024-06-21 16:44:56,880 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 329 transitions, 3515 flow [2024-06-21 16:44:56,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:56,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:44:56,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:44:56,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-21 16:44:56,880 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:44:56,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:44:56,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1878863080, now seen corresponding path program 3 times [2024-06-21 16:44:56,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:44:56,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717272281] [2024-06-21 16:44:56,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:44:56,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:44:56,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:44:57,757 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:44:57,757 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:44:57,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717272281] [2024-06-21 16:44:57,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717272281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:44:57,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:44:57,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:44:57,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972287097] [2024-06-21 16:44:57,758 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:44:57,758 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:44:57,758 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:44:57,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:44:57,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:44:57,843 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:44:57,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 329 transitions, 3515 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:44:57,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:44:57,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:44:57,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:44:58,945 INFO L124 PetriNetUnfolderBase]: 3553/5751 cut-off events. [2024-06-21 16:44:58,946 INFO L125 PetriNetUnfolderBase]: For 1148961/1148961 co-relation queries the response was YES. [2024-06-21 16:44:58,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56186 conditions, 5751 events. 3553/5751 cut-off events. For 1148961/1148961 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35222 event pairs, 836 based on Foata normal form. 1/5752 useless extension candidates. Maximal degree in co-relation 56052. Up to 5364 conditions per place. [2024-06-21 16:44:59,021 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 302 selfloop transitions, 30 changer transitions 0/343 dead transitions. [2024-06-21 16:44:59,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 343 transitions, 4213 flow [2024-06-21 16:44:59,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:44:59,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:44:59,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:44:59,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-21 16:44:59,023 INFO L175 Difference]: Start difference. First operand has 279 places, 329 transitions, 3515 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:44:59,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 343 transitions, 4213 flow [2024-06-21 16:45:00,489 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 343 transitions, 4043 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:00,493 INFO L231 Difference]: Finished difference. Result has 281 places, 329 transitions, 3411 flow [2024-06-21 16:45:00,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3345, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3411, PETRI_PLACES=281, PETRI_TRANSITIONS=329} [2024-06-21 16:45:00,494 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 236 predicate places. [2024-06-21 16:45:00,494 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 329 transitions, 3411 flow [2024-06-21 16:45:00,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:00,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:00,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:00,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-21 16:45:00,494 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:00,495 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:00,495 INFO L85 PathProgramCache]: Analyzing trace with hash -683973649, now seen corresponding path program 1 times [2024-06-21 16:45:00,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:00,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359868124] [2024-06-21 16:45:00,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:00,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:00,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:01,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:01,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:01,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359868124] [2024-06-21 16:45:01,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359868124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:01,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:01,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:01,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109010011] [2024-06-21 16:45:01,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:01,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:01,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:01,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:01,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:01,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:01,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 329 transitions, 3411 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:01,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:01,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:01,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:02,582 INFO L124 PetriNetUnfolderBase]: 3397/5559 cut-off events. [2024-06-21 16:45:02,583 INFO L125 PetriNetUnfolderBase]: For 1174901/1174901 co-relation queries the response was YES. [2024-06-21 16:45:02,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55410 conditions, 5559 events. 3397/5559 cut-off events. For 1174901/1174901 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34667 event pairs, 800 based on Foata normal form. 2/5513 useless extension candidates. Maximal degree in co-relation 55275. Up to 5052 conditions per place. [2024-06-21 16:45:02,656 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 297 selfloop transitions, 17 changer transitions 0/346 dead transitions. [2024-06-21 16:45:02,656 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 346 transitions, 4141 flow [2024-06-21 16:45:02,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:02,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:02,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:45:02,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:45:02,657 INFO L175 Difference]: Start difference. First operand has 281 places, 329 transitions, 3411 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:45:02,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 346 transitions, 4141 flow [2024-06-21 16:45:04,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 346 transitions, 4073 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-21 16:45:04,425 INFO L231 Difference]: Finished difference. Result has 282 places, 332 transitions, 3457 flow [2024-06-21 16:45:04,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3343, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3457, PETRI_PLACES=282, PETRI_TRANSITIONS=332} [2024-06-21 16:45:04,426 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 237 predicate places. [2024-06-21 16:45:04,426 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 332 transitions, 3457 flow [2024-06-21 16:45:04,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:04,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:04,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:04,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-21 16:45:04,427 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:04,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:04,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1147605784, now seen corresponding path program 4 times [2024-06-21 16:45:04,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:04,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785814918] [2024-06-21 16:45:04,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:04,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:04,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:05,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:05,193 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785814918] [2024-06-21 16:45:05,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785814918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:05,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:05,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:05,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811045304] [2024-06-21 16:45:05,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:05,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:05,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:05,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:05,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:05,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:05,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 332 transitions, 3457 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:05,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:05,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:05,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:06,381 INFO L124 PetriNetUnfolderBase]: 3571/5780 cut-off events. [2024-06-21 16:45:06,381 INFO L125 PetriNetUnfolderBase]: For 1198554/1198556 co-relation queries the response was YES. [2024-06-21 16:45:06,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57166 conditions, 5780 events. 3571/5780 cut-off events. For 1198554/1198556 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35455 event pairs, 843 based on Foata normal form. 3/5783 useless extension candidates. Maximal degree in co-relation 57030. Up to 5360 conditions per place. [2024-06-21 16:45:06,453 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 294 selfloop transitions, 49 changer transitions 0/354 dead transitions. [2024-06-21 16:45:06,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 354 transitions, 4797 flow [2024-06-21 16:45:06,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:06,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:06,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:45:06,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:45:06,454 INFO L175 Difference]: Start difference. First operand has 282 places, 332 transitions, 3457 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:45:06,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 354 transitions, 4797 flow [2024-06-21 16:45:08,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 354 transitions, 4705 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:08,204 INFO L231 Difference]: Finished difference. Result has 284 places, 341 transitions, 3715 flow [2024-06-21 16:45:08,204 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3365, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=332, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3715, PETRI_PLACES=284, PETRI_TRANSITIONS=341} [2024-06-21 16:45:08,205 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 239 predicate places. [2024-06-21 16:45:08,205 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 341 transitions, 3715 flow [2024-06-21 16:45:08,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:08,205 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:08,205 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:08,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-21 16:45:08,205 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:08,206 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:08,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1929176613, now seen corresponding path program 2 times [2024-06-21 16:45:08,206 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:08,206 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601019301] [2024-06-21 16:45:08,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:08,206 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:08,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:09,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:09,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:09,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601019301] [2024-06-21 16:45:09,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601019301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:09,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:09,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:09,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723029925] [2024-06-21 16:45:09,122 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:09,122 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:09,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:09,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:09,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:09,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:09,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 341 transitions, 3715 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:09,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:09,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:09,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:10,394 INFO L124 PetriNetUnfolderBase]: 3415/5587 cut-off events. [2024-06-21 16:45:10,395 INFO L125 PetriNetUnfolderBase]: For 1228710/1228712 co-relation queries the response was YES. [2024-06-21 16:45:10,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56839 conditions, 5587 events. 3415/5587 cut-off events. For 1228710/1228712 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34823 event pairs, 804 based on Foata normal form. 4/5543 useless extension candidates. Maximal degree in co-relation 56702. Up to 5042 conditions per place. [2024-06-21 16:45:10,465 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 287 selfloop transitions, 37 changer transitions 0/359 dead transitions. [2024-06-21 16:45:10,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 359 transitions, 4737 flow [2024-06-21 16:45:10,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:10,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:10,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:45:10,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:45:10,466 INFO L175 Difference]: Start difference. First operand has 284 places, 341 transitions, 3715 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:45:10,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 359 transitions, 4737 flow [2024-06-21 16:45:12,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 359 transitions, 4573 flow, removed 54 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:12,179 INFO L231 Difference]: Finished difference. Result has 288 places, 347 transitions, 3789 flow [2024-06-21 16:45:12,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3555, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3789, PETRI_PLACES=288, PETRI_TRANSITIONS=347} [2024-06-21 16:45:12,180 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 243 predicate places. [2024-06-21 16:45:12,180 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 347 transitions, 3789 flow [2024-06-21 16:45:12,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:12,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:12,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:12,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-21 16:45:12,180 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:12,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:12,181 INFO L85 PathProgramCache]: Analyzing trace with hash 1929168677, now seen corresponding path program 4 times [2024-06-21 16:45:12,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:12,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1018946338] [2024-06-21 16:45:12,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:12,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:12,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:13,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:13,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:13,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1018946338] [2024-06-21 16:45:13,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1018946338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:13,045 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:13,045 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:13,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104875755] [2024-06-21 16:45:13,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:13,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:13,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:13,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:13,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:13,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:13,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 347 transitions, 3789 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:13,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:13,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:13,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:14,346 INFO L124 PetriNetUnfolderBase]: 3496/5712 cut-off events. [2024-06-21 16:45:14,346 INFO L125 PetriNetUnfolderBase]: For 1252169/1252171 co-relation queries the response was YES. [2024-06-21 16:45:14,397 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57539 conditions, 5712 events. 3496/5712 cut-off events. For 1252169/1252171 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 35424 event pairs, 815 based on Foata normal form. 2/5714 useless extension candidates. Maximal degree in co-relation 57401. Up to 5130 conditions per place. [2024-06-21 16:45:14,425 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 291 selfloop transitions, 38 changer transitions 0/363 dead transitions. [2024-06-21 16:45:14,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 363 transitions, 4565 flow [2024-06-21 16:45:14,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:14,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:14,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:45:14,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:45:14,427 INFO L175 Difference]: Start difference. First operand has 288 places, 347 transitions, 3789 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:45:14,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 363 transitions, 4565 flow [2024-06-21 16:45:16,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 363 transitions, 4463 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-21 16:45:16,142 INFO L231 Difference]: Finished difference. Result has 292 places, 350 transitions, 3859 flow [2024-06-21 16:45:16,143 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3687, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3859, PETRI_PLACES=292, PETRI_TRANSITIONS=350} [2024-06-21 16:45:16,143 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 247 predicate places. [2024-06-21 16:45:16,143 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 350 transitions, 3859 flow [2024-06-21 16:45:16,143 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:16,143 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:16,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:16,144 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-21 16:45:16,144 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:16,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:16,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1929168894, now seen corresponding path program 5 times [2024-06-21 16:45:16,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:16,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801296337] [2024-06-21 16:45:16,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:16,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:16,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:17,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:17,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:17,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801296337] [2024-06-21 16:45:17,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801296337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:17,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:17,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:17,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970253948] [2024-06-21 16:45:17,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:17,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:17,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:17,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:17,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:17,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:17,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 350 transitions, 3859 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:17,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:17,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:17,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:18,297 INFO L124 PetriNetUnfolderBase]: 3575/5790 cut-off events. [2024-06-21 16:45:18,297 INFO L125 PetriNetUnfolderBase]: For 1263166/1263168 co-relation queries the response was YES. [2024-06-21 16:45:18,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58492 conditions, 5790 events. 3575/5790 cut-off events. For 1263166/1263168 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35486 event pairs, 843 based on Foata normal form. 3/5793 useless extension candidates. Maximal degree in co-relation 58352. Up to 5367 conditions per place. [2024-06-21 16:45:18,376 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 301 selfloop transitions, 50 changer transitions 0/362 dead transitions. [2024-06-21 16:45:18,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 299 places, 362 transitions, 4787 flow [2024-06-21 16:45:18,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-21 16:45:18,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4289772727272727 [2024-06-21 16:45:18,378 INFO L175 Difference]: Start difference. First operand has 292 places, 350 transitions, 3859 flow. Second operand 8 states and 151 transitions. [2024-06-21 16:45:18,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 299 places, 362 transitions, 4787 flow [2024-06-21 16:45:20,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 362 transitions, 4581 flow, removed 67 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:20,360 INFO L231 Difference]: Finished difference. Result has 294 places, 350 transitions, 3759 flow [2024-06-21 16:45:20,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3653, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3759, PETRI_PLACES=294, PETRI_TRANSITIONS=350} [2024-06-21 16:45:20,361 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 249 predicate places. [2024-06-21 16:45:20,361 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 350 transitions, 3759 flow [2024-06-21 16:45:20,361 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:20,361 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:20,361 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:20,361 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-21 16:45:20,361 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:20,362 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:20,362 INFO L85 PathProgramCache]: Analyzing trace with hash 1938699813, now seen corresponding path program 3 times [2024-06-21 16:45:20,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:20,362 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830613625] [2024-06-21 16:45:20,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:20,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:20,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:21,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:21,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830613625] [2024-06-21 16:45:21,218 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830613625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:21,218 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:21,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:21,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646051347] [2024-06-21 16:45:21,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:21,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:21,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:21,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:21,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:21,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:21,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 350 transitions, 3759 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:21,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:21,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:21,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:22,420 INFO L124 PetriNetUnfolderBase]: 3419/5597 cut-off events. [2024-06-21 16:45:22,421 INFO L125 PetriNetUnfolderBase]: For 1290149/1290151 co-relation queries the response was YES. [2024-06-21 16:45:22,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57713 conditions, 5597 events. 3419/5597 cut-off events. For 1290149/1290151 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34942 event pairs, 804 based on Foata normal form. 4/5553 useless extension candidates. Maximal degree in co-relation 57572. Up to 5048 conditions per place. [2024-06-21 16:45:22,503 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 287 selfloop transitions, 43 changer transitions 0/365 dead transitions. [2024-06-21 16:45:22,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 365 transitions, 4723 flow [2024-06-21 16:45:22,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:22,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:22,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:45:22,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:45:22,505 INFO L175 Difference]: Start difference. First operand has 294 places, 350 transitions, 3759 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:45:22,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 365 transitions, 4723 flow [2024-06-21 16:45:24,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 365 transitions, 4619 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:24,065 INFO L231 Difference]: Finished difference. Result has 296 places, 353 transitions, 3824 flow [2024-06-21 16:45:24,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3655, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=350, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3824, PETRI_PLACES=296, PETRI_TRANSITIONS=353} [2024-06-21 16:45:24,065 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 251 predicate places. [2024-06-21 16:45:24,065 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 353 transitions, 3824 flow [2024-06-21 16:45:24,066 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:24,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:24,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:24,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-21 16:45:24,066 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:24,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:24,066 INFO L85 PathProgramCache]: Analyzing trace with hash 1938373104, now seen corresponding path program 6 times [2024-06-21 16:45:24,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:24,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990610800] [2024-06-21 16:45:24,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:24,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:24,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:24,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:24,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:24,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990610800] [2024-06-21 16:45:24,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990610800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:24,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:24,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:24,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767106271] [2024-06-21 16:45:24,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:24,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:24,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:24,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:24,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:24,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:24,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 353 transitions, 3824 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:24,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:24,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:24,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:26,057 INFO L124 PetriNetUnfolderBase]: 3582/5800 cut-off events. [2024-06-21 16:45:26,057 INFO L125 PetriNetUnfolderBase]: For 1305757/1305759 co-relation queries the response was YES. [2024-06-21 16:45:26,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58812 conditions, 5800 events. 3582/5800 cut-off events. For 1305757/1305759 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35558 event pairs, 843 based on Foata normal form. 3/5803 useless extension candidates. Maximal degree in co-relation 58670. Up to 5376 conditions per place. [2024-06-21 16:45:26,142 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 301 selfloop transitions, 52 changer transitions 0/364 dead transitions. [2024-06-21 16:45:26,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 364 transitions, 4556 flow [2024-06-21 16:45:26,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:26,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:26,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-21 16:45:26,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42329545454545453 [2024-06-21 16:45:26,143 INFO L175 Difference]: Start difference. First operand has 296 places, 353 transitions, 3824 flow. Second operand 8 states and 149 transitions. [2024-06-21 16:45:26,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 364 transitions, 4556 flow [2024-06-21 16:45:28,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 364 transitions, 4367 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-21 16:45:28,273 INFO L231 Difference]: Finished difference. Result has 299 places, 353 transitions, 3745 flow [2024-06-21 16:45:28,273 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3635, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=301, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3745, PETRI_PLACES=299, PETRI_TRANSITIONS=353} [2024-06-21 16:45:28,273 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-21 16:45:28,274 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 353 transitions, 3745 flow [2024-06-21 16:45:28,274 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:28,274 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:28,274 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:28,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-21 16:45:28,274 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:28,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:28,274 INFO L85 PathProgramCache]: Analyzing trace with hash 1929436083, now seen corresponding path program 4 times [2024-06-21 16:45:28,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:28,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478346489] [2024-06-21 16:45:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:28,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:28,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:29,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:29,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:29,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478346489] [2024-06-21 16:45:29,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478346489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:29,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:29,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:29,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293560482] [2024-06-21 16:45:29,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:29,126 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:29,126 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:29,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:29,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:29,199 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:29,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 353 transitions, 3745 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:29,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:29,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:29,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:30,259 INFO L124 PetriNetUnfolderBase]: 3415/5590 cut-off events. [2024-06-21 16:45:30,260 INFO L125 PetriNetUnfolderBase]: For 1322717/1322719 co-relation queries the response was YES. [2024-06-21 16:45:30,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57685 conditions, 5590 events. 3415/5590 cut-off events. For 1322717/1322719 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 34838 event pairs, 803 based on Foata normal form. 4/5546 useless extension candidates. Maximal degree in co-relation 57542. Up to 5044 conditions per place. [2024-06-21 16:45:30,331 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 288 selfloop transitions, 41 changer transitions 0/364 dead transitions. [2024-06-21 16:45:30,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 364 transitions, 4429 flow [2024-06-21 16:45:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:30,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:30,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:45:30,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:45:30,332 INFO L175 Difference]: Start difference. First operand has 299 places, 353 transitions, 3745 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:45:30,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 364 transitions, 4429 flow [2024-06-21 16:45:31,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 298 places, 364 transitions, 4247 flow, removed 29 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:31,711 INFO L231 Difference]: Finished difference. Result has 299 places, 353 transitions, 3651 flow [2024-06-21 16:45:31,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3563, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3651, PETRI_PLACES=299, PETRI_TRANSITIONS=353} [2024-06-21 16:45:31,712 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 254 predicate places. [2024-06-21 16:45:31,712 INFO L495 AbstractCegarLoop]: Abstraction has has 299 places, 353 transitions, 3651 flow [2024-06-21 16:45:31,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:31,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:31,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:31,712 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-21 16:45:31,712 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:31,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:31,713 INFO L85 PathProgramCache]: Analyzing trace with hash 1938711717, now seen corresponding path program 1 times [2024-06-21 16:45:31,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:31,713 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [685471706] [2024-06-21 16:45:31,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:31,713 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:31,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:32,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:32,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:32,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [685471706] [2024-06-21 16:45:32,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [685471706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:32,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:32,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:32,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887392691] [2024-06-21 16:45:32,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:32,910 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:32,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:32,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:32,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:33,031 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 299 places, 353 transitions, 3651 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:33,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:33,032 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:33,032 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:34,241 INFO L124 PetriNetUnfolderBase]: 3532/5705 cut-off events. [2024-06-21 16:45:34,241 INFO L125 PetriNetUnfolderBase]: For 1339808/1339808 co-relation queries the response was YES. [2024-06-21 16:45:34,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58540 conditions, 5705 events. 3532/5705 cut-off events. For 1339808/1339808 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35146 event pairs, 830 based on Foata normal form. 1/5658 useless extension candidates. Maximal degree in co-relation 58396. Up to 5312 conditions per place. [2024-06-21 16:45:34,309 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 319 selfloop transitions, 20 changer transitions 0/368 dead transitions. [2024-06-21 16:45:34,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 368 transitions, 4449 flow [2024-06-21 16:45:34,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:34,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:34,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-21 16:45:34,310 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.398989898989899 [2024-06-21 16:45:34,310 INFO L175 Difference]: Start difference. First operand has 299 places, 353 transitions, 3651 flow. Second operand 9 states and 158 transitions. [2024-06-21 16:45:34,310 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 368 transitions, 4449 flow [2024-06-21 16:45:35,877 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 368 transitions, 4338 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-21 16:45:35,882 INFO L231 Difference]: Finished difference. Result has 300 places, 356 transitions, 3684 flow [2024-06-21 16:45:35,882 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3540, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=333, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3684, PETRI_PLACES=300, PETRI_TRANSITIONS=356} [2024-06-21 16:45:35,883 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 255 predicate places. [2024-06-21 16:45:35,883 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 356 transitions, 3684 flow [2024-06-21 16:45:35,883 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:35,883 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:35,883 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:35,883 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-21 16:45:35,883 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:35,883 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:35,884 INFO L85 PathProgramCache]: Analyzing trace with hash -599703655, now seen corresponding path program 1 times [2024-06-21 16:45:35,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:35,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955028187] [2024-06-21 16:45:35,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:35,884 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:35,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:36,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:36,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955028187] [2024-06-21 16:45:36,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955028187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:36,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:36,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:36,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508801862] [2024-06-21 16:45:36,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:36,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:36,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:36,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:36,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:36,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:36,743 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 356 transitions, 3684 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:36,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:36,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:36,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:37,906 INFO L124 PetriNetUnfolderBase]: 3465/5647 cut-off events. [2024-06-21 16:45:37,907 INFO L125 PetriNetUnfolderBase]: For 1384900/1384902 co-relation queries the response was YES. [2024-06-21 16:45:37,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58912 conditions, 5647 events. 3465/5647 cut-off events. For 1384900/1384902 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 35073 event pairs, 623 based on Foata normal form. 6/5625 useless extension candidates. Maximal degree in co-relation 58767. Up to 4969 conditions per place. [2024-06-21 16:45:37,985 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 309 selfloop transitions, 26 changer transitions 0/387 dead transitions. [2024-06-21 16:45:37,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 387 transitions, 4528 flow [2024-06-21 16:45:37,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:37,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 171 transitions. [2024-06-21 16:45:37,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48579545454545453 [2024-06-21 16:45:37,987 INFO L175 Difference]: Start difference. First operand has 300 places, 356 transitions, 3684 flow. Second operand 8 states and 171 transitions. [2024-06-21 16:45:37,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 387 transitions, 4528 flow [2024-06-21 16:45:39,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 297 places, 387 transitions, 4336 flow, removed 46 selfloop flow, removed 10 redundant places. [2024-06-21 16:45:39,489 INFO L231 Difference]: Finished difference. Result has 298 places, 359 transitions, 3660 flow [2024-06-21 16:45:39,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3492, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=356, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3660, PETRI_PLACES=298, PETRI_TRANSITIONS=359} [2024-06-21 16:45:39,490 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 253 predicate places. [2024-06-21 16:45:39,490 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 359 transitions, 3660 flow [2024-06-21 16:45:39,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:39,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:39,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:39,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-21 16:45:39,490 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:39,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:39,491 INFO L85 PathProgramCache]: Analyzing trace with hash -599347465, now seen corresponding path program 2 times [2024-06-21 16:45:39,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:39,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987234620] [2024-06-21 16:45:39,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:39,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:39,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:40,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:40,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987234620] [2024-06-21 16:45:40,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987234620] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:40,327 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:40,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:40,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417678496] [2024-06-21 16:45:40,327 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:40,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:40,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:40,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:40,327 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:40,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:40,435 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 359 transitions, 3660 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:40,435 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:40,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:40,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:41,631 INFO L124 PetriNetUnfolderBase]: 3481/5671 cut-off events. [2024-06-21 16:45:41,632 INFO L125 PetriNetUnfolderBase]: For 1411942/1411944 co-relation queries the response was YES. [2024-06-21 16:45:41,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59683 conditions, 5671 events. 3481/5671 cut-off events. For 1411942/1411944 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 35403 event pairs, 802 based on Foata normal form. 6/5629 useless extension candidates. Maximal degree in co-relation 59538. Up to 5039 conditions per place. [2024-06-21 16:45:41,712 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 307 selfloop transitions, 27 changer transitions 0/386 dead transitions. [2024-06-21 16:45:41,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 386 transitions, 4498 flow [2024-06-21 16:45:41,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:41,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:41,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-06-21 16:45:41,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4772727272727273 [2024-06-21 16:45:41,713 INFO L175 Difference]: Start difference. First operand has 298 places, 359 transitions, 3660 flow. Second operand 8 states and 168 transitions. [2024-06-21 16:45:41,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 386 transitions, 4498 flow [2024-06-21 16:45:43,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 386 transitions, 4352 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:43,658 INFO L231 Difference]: Finished difference. Result has 300 places, 362 transitions, 3690 flow [2024-06-21 16:45:43,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=359, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3690, PETRI_PLACES=300, PETRI_TRANSITIONS=362} [2024-06-21 16:45:43,659 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 255 predicate places. [2024-06-21 16:45:43,659 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 362 transitions, 3690 flow [2024-06-21 16:45:43,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:43,659 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:43,659 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:43,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-21 16:45:43,659 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:43,660 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:43,660 INFO L85 PathProgramCache]: Analyzing trace with hash -599334569, now seen corresponding path program 1 times [2024-06-21 16:45:43,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:43,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535310751] [2024-06-21 16:45:43,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:43,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:43,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:44,436 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:44,436 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:44,436 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535310751] [2024-06-21 16:45:44,436 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535310751] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:44,436 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:44,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:45:44,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559534180] [2024-06-21 16:45:44,437 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:44,437 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:45:44,437 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:44,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:45:44,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:45:44,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:44,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 362 transitions, 3690 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:44,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:44,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:44,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:45,794 INFO L124 PetriNetUnfolderBase]: 3574/5768 cut-off events. [2024-06-21 16:45:45,795 INFO L125 PetriNetUnfolderBase]: For 1424569/1424571 co-relation queries the response was YES. [2024-06-21 16:45:45,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60452 conditions, 5768 events. 3574/5768 cut-off events. For 1424569/1424571 co-relation queries the response was YES. Maximal size of possible extension queue 318. Compared 35575 event pairs, 833 based on Foata normal form. 4/5724 useless extension candidates. Maximal degree in co-relation 60306. Up to 5291 conditions per place. [2024-06-21 16:45:45,876 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 329 selfloop transitions, 32 changer transitions 0/390 dead transitions. [2024-06-21 16:45:45,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 308 places, 390 transitions, 4576 flow [2024-06-21 16:45:45,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:45:45,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:45:45,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:45:45,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 16:45:45,877 INFO L175 Difference]: Start difference. First operand has 300 places, 362 transitions, 3690 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:45:45,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 308 places, 390 transitions, 4576 flow [2024-06-21 16:45:47,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 390 transitions, 4422 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:47,419 INFO L231 Difference]: Finished difference. Result has 303 places, 366 transitions, 3719 flow [2024-06-21 16:45:47,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3536, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=362, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3719, PETRI_PLACES=303, PETRI_TRANSITIONS=366} [2024-06-21 16:45:47,420 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 258 predicate places. [2024-06-21 16:45:47,420 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 366 transitions, 3719 flow [2024-06-21 16:45:47,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:47,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:47,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:47,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-21 16:45:47,420 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:47,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:47,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1012616607, now seen corresponding path program 3 times [2024-06-21 16:45:47,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:47,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28561986] [2024-06-21 16:45:47,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:47,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:48,389 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:48,389 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:48,389 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28561986] [2024-06-21 16:45:48,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28561986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:48,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:48,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:48,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073549425] [2024-06-21 16:45:48,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:48,390 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:48,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:48,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:48,390 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:48,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:45:48,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 366 transitions, 3719 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:48,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:48,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:45:48,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:49,785 INFO L124 PetriNetUnfolderBase]: 3505/5707 cut-off events. [2024-06-21 16:45:49,785 INFO L125 PetriNetUnfolderBase]: For 1465859/1465861 co-relation queries the response was YES. [2024-06-21 16:45:49,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60889 conditions, 5707 events. 3505/5707 cut-off events. For 1465859/1465861 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 35645 event pairs, 801 based on Foata normal form. 6/5665 useless extension candidates. Maximal degree in co-relation 60742. Up to 5045 conditions per place. [2024-06-21 16:45:49,859 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 296 selfloop transitions, 39 changer transitions 0/387 dead transitions. [2024-06-21 16:45:49,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 387 transitions, 4553 flow [2024-06-21 16:45:49,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:49,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:49,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 16:45:49,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 16:45:49,860 INFO L175 Difference]: Start difference. First operand has 303 places, 366 transitions, 3719 flow. Second operand 8 states and 163 transitions. [2024-06-21 16:45:49,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 387 transitions, 4553 flow [2024-06-21 16:45:51,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 387 transitions, 4398 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-21 16:45:51,410 INFO L231 Difference]: Finished difference. Result has 304 places, 369 transitions, 3774 flow [2024-06-21 16:45:51,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3774, PETRI_PLACES=304, PETRI_TRANSITIONS=369} [2024-06-21 16:45:51,410 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 259 predicate places. [2024-06-21 16:45:51,411 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 369 transitions, 3774 flow [2024-06-21 16:45:51,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:51,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:51,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:51,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-21 16:45:51,411 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:45:51,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:51,412 INFO L85 PathProgramCache]: Analyzing trace with hash -1903962087, now seen corresponding path program 1 times [2024-06-21 16:45:51,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:51,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53145908] [2024-06-21 16:45:51,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:51,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:51,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:52,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:52,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:52,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53145908] [2024-06-21 16:45:52,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53145908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:52,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:52,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:52,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934736965] [2024-06-21 16:45:52,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:52,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:52,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:52,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:52,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:52,108 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:52,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 369 transitions, 3774 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:52,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:52,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:52,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:53,368 INFO L124 PetriNetUnfolderBase]: 3691/5938 cut-off events. [2024-06-21 16:45:53,368 INFO L125 PetriNetUnfolderBase]: For 1483088/1483090 co-relation queries the response was YES. [2024-06-21 16:45:53,426 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62546 conditions, 5938 events. 3691/5938 cut-off events. For 1483088/1483090 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36418 event pairs, 838 based on Foata normal form. 4/5942 useless extension candidates. Maximal degree in co-relation 62398. Up to 5377 conditions per place. [2024-06-21 16:45:53,453 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 328 selfloop transitions, 40 changer transitions 0/396 dead transitions. [2024-06-21 16:45:53,453 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 396 transitions, 4682 flow [2024-06-21 16:45:53,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:53,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:53,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-21 16:45:53,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4630681818181818 [2024-06-21 16:45:53,454 INFO L175 Difference]: Start difference. First operand has 304 places, 369 transitions, 3774 flow. Second operand 8 states and 163 transitions. [2024-06-21 16:45:53,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 396 transitions, 4682 flow [2024-06-21 16:45:55,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 396 transitions, 4494 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 16:45:55,696 INFO L231 Difference]: Finished difference. Result has 306 places, 373 transitions, 3795 flow [2024-06-21 16:45:55,696 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3586, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=329, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3795, PETRI_PLACES=306, PETRI_TRANSITIONS=373} [2024-06-21 16:45:55,697 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 261 predicate places. [2024-06-21 16:45:55,697 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 373 transitions, 3795 flow [2024-06-21 16:45:55,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:55,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:45:55,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:45:55,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-21 16:45:55,697 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)] === [2024-06-21 16:45:55,698 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:45:55,698 INFO L85 PathProgramCache]: Analyzing trace with hash -491313395, now seen corresponding path program 1 times [2024-06-21 16:45:55,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:45:55,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5560579] [2024-06-21 16:45:55,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:45:55,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:45:55,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:45:56,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:45:56,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:45:56,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5560579] [2024-06-21 16:45:56,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5560579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:45:56,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:45:56,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:45:56,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967048407] [2024-06-21 16:45:56,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:45:56,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:45:56,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:45:56,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:45:56,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:45:56,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:45:56,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 373 transitions, 3795 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:45:56,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:45:56,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:45:56,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:45:57,828 INFO L124 PetriNetUnfolderBase]: 3610/5820 cut-off events. [2024-06-21 16:45:57,829 INFO L125 PetriNetUnfolderBase]: For 1502463/1502465 co-relation queries the response was YES. [2024-06-21 16:45:57,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62479 conditions, 5820 events. 3610/5820 cut-off events. For 1502463/1502465 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 35902 event pairs, 829 based on Foata normal form. 4/5776 useless extension candidates. Maximal degree in co-relation 62330. Up to 5345 conditions per place. [2024-06-21 16:45:57,914 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 340 selfloop transitions, 27 changer transitions 0/397 dead transitions. [2024-06-21 16:45:57,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 397 transitions, 4651 flow [2024-06-21 16:45:57,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:45:57,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:45:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:45:57,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:45:57,915 INFO L175 Difference]: Start difference. First operand has 306 places, 373 transitions, 3795 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:45:57,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 397 transitions, 4651 flow [2024-06-21 16:46:00,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 307 places, 397 transitions, 4470 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:00,692 INFO L231 Difference]: Finished difference. Result has 308 places, 377 transitions, 3755 flow [2024-06-21 16:46:00,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3614, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=373, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=346, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3755, PETRI_PLACES=308, PETRI_TRANSITIONS=377} [2024-06-21 16:46:00,693 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 263 predicate places. [2024-06-21 16:46:00,693 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 377 transitions, 3755 flow [2024-06-21 16:46:00,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:00,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:00,693 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:00,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-21 16:46:00,693 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:00,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:00,694 INFO L85 PathProgramCache]: Analyzing trace with hash -491313643, now seen corresponding path program 2 times [2024-06-21 16:46:00,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:00,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1321256165] [2024-06-21 16:46:00,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:00,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:00,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:01,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:01,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1321256165] [2024-06-21 16:46:01,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1321256165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:01,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:01,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:01,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225563907] [2024-06-21 16:46:01,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:01,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:01,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:01,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:01,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:01,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:01,639 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 377 transitions, 3755 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:01,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:01,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:01,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:02,797 INFO L124 PetriNetUnfolderBase]: 3711/5966 cut-off events. [2024-06-21 16:46:02,797 INFO L125 PetriNetUnfolderBase]: For 1538181/1538183 co-relation queries the response was YES. [2024-06-21 16:46:02,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63466 conditions, 5966 events. 3711/5966 cut-off events. For 1538181/1538183 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 36528 event pairs, 836 based on Foata normal form. 4/5970 useless extension candidates. Maximal degree in co-relation 63316. Up to 5389 conditions per place. [2024-06-21 16:46:02,885 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 325 selfloop transitions, 47 changer transitions 0/401 dead transitions. [2024-06-21 16:46:02,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 401 transitions, 4671 flow [2024-06-21 16:46:02,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:02,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:02,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-21 16:46:02,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4602272727272727 [2024-06-21 16:46:02,886 INFO L175 Difference]: Start difference. First operand has 308 places, 377 transitions, 3755 flow. Second operand 8 states and 162 transitions. [2024-06-21 16:46:02,886 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 401 transitions, 4671 flow [2024-06-21 16:46:05,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 401 transitions, 4578 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:05,318 INFO L231 Difference]: Finished difference. Result has 310 places, 381 transitions, 3893 flow [2024-06-21 16:46:05,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3662, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=377, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3893, PETRI_PLACES=310, PETRI_TRANSITIONS=381} [2024-06-21 16:46:05,318 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 265 predicate places. [2024-06-21 16:46:05,318 INFO L495 AbstractCegarLoop]: Abstraction has has 310 places, 381 transitions, 3893 flow [2024-06-21 16:46:05,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:05,319 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:05,319 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:05,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-21 16:46:05,319 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:05,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:05,320 INFO L85 PathProgramCache]: Analyzing trace with hash -1012493475, now seen corresponding path program 3 times [2024-06-21 16:46:05,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:05,320 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570020061] [2024-06-21 16:46:05,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:05,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:05,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:06,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:06,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:06,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570020061] [2024-06-21 16:46:06,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570020061] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:06,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:06,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:06,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1179258313] [2024-06-21 16:46:06,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:06,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:06,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:06,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:06,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:06,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:06,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 310 places, 381 transitions, 3893 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:06,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:06,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:06,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:07,461 INFO L124 PetriNetUnfolderBase]: 3737/6004 cut-off events. [2024-06-21 16:46:07,461 INFO L125 PetriNetUnfolderBase]: For 1581866/1581868 co-relation queries the response was YES. [2024-06-21 16:46:07,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65023 conditions, 6004 events. 3737/6004 cut-off events. For 1581866/1581868 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 36818 event pairs, 837 based on Foata normal form. 4/6008 useless extension candidates. Maximal degree in co-relation 64872. Up to 5360 conditions per place. [2024-06-21 16:46:07,545 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 319 selfloop transitions, 59 changer transitions 0/407 dead transitions. [2024-06-21 16:46:07,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 407 transitions, 5175 flow [2024-06-21 16:46:07,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:07,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:07,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:46:07,546 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:46:07,546 INFO L175 Difference]: Start difference. First operand has 310 places, 381 transitions, 3893 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:46:07,546 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 407 transitions, 5175 flow [2024-06-21 16:46:09,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 407 transitions, 4972 flow, removed 57 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:09,517 INFO L231 Difference]: Finished difference. Result has 312 places, 388 transitions, 4037 flow [2024-06-21 16:46:09,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3690, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=381, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4037, PETRI_PLACES=312, PETRI_TRANSITIONS=388} [2024-06-21 16:46:09,517 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 267 predicate places. [2024-06-21 16:46:09,517 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 388 transitions, 4037 flow [2024-06-21 16:46:09,518 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:09,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:09,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:09,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-21 16:46:09,518 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:09,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:09,518 INFO L85 PathProgramCache]: Analyzing trace with hash -888784387, now seen corresponding path program 2 times [2024-06-21 16:46:09,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:09,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684781289] [2024-06-21 16:46:09,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:09,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:09,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:10,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:10,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:10,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684781289] [2024-06-21 16:46:10,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684781289] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:10,280 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:10,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:10,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888481229] [2024-06-21 16:46:10,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:10,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:10,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:10,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:10,281 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:10,369 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:10,369 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 388 transitions, 4037 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:10,369 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:10,369 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:10,369 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:11,651 INFO L124 PetriNetUnfolderBase]: 3664/5897 cut-off events. [2024-06-21 16:46:11,651 INFO L125 PetriNetUnfolderBase]: For 1613206/1613208 co-relation queries the response was YES. [2024-06-21 16:46:11,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65223 conditions, 5897 events. 3664/5897 cut-off events. For 1613206/1613208 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36365 event pairs, 830 based on Foata normal form. 4/5853 useless extension candidates. Maximal degree in co-relation 65071. Up to 5325 conditions per place. [2024-06-21 16:46:11,727 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 324 selfloop transitions, 57 changer transitions 0/414 dead transitions. [2024-06-21 16:46:11,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 414 transitions, 5440 flow [2024-06-21 16:46:11,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:11,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:11,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:46:11,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:46:11,756 INFO L175 Difference]: Start difference. First operand has 312 places, 388 transitions, 4037 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:46:11,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 414 transitions, 5440 flow [2024-06-21 16:46:13,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 414 transitions, 5264 flow, removed 67 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:13,605 INFO L231 Difference]: Finished difference. Result has 316 places, 395 transitions, 4131 flow [2024-06-21 16:46:13,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3861, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=388, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4131, PETRI_PLACES=316, PETRI_TRANSITIONS=395} [2024-06-21 16:46:13,605 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 271 predicate places. [2024-06-21 16:46:13,605 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 395 transitions, 4131 flow [2024-06-21 16:46:13,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:13,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:13,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:13,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-21 16:46:13,606 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:13,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:13,606 INFO L85 PathProgramCache]: Analyzing trace with hash -254841365, now seen corresponding path program 3 times [2024-06-21 16:46:13,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:13,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498866757] [2024-06-21 16:46:13,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:13,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:13,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:14,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:14,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:14,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498866757] [2024-06-21 16:46:14,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498866757] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:14,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:14,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:14,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540131139] [2024-06-21 16:46:14,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:14,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:14,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:14,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:14,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:14,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:14,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 395 transitions, 4131 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:14,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:14,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:14,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:15,668 INFO L124 PetriNetUnfolderBase]: 3658/5889 cut-off events. [2024-06-21 16:46:15,668 INFO L125 PetriNetUnfolderBase]: For 1626186/1626188 co-relation queries the response was YES. [2024-06-21 16:46:15,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65149 conditions, 5889 events. 3658/5889 cut-off events. For 1626186/1626188 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 36319 event pairs, 830 based on Foata normal form. 4/5845 useless extension candidates. Maximal degree in co-relation 64995. Up to 5320 conditions per place. [2024-06-21 16:46:15,753 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 323 selfloop transitions, 57 changer transitions 0/413 dead transitions. [2024-06-21 16:46:15,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 413 transitions, 5161 flow [2024-06-21 16:46:15,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:15,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:15,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:46:15,754 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:46:15,754 INFO L175 Difference]: Start difference. First operand has 316 places, 395 transitions, 4131 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:46:15,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 413 transitions, 5161 flow [2024-06-21 16:46:18,213 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 413 transitions, 4999 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:18,217 INFO L231 Difference]: Finished difference. Result has 320 places, 395 transitions, 4093 flow [2024-06-21 16:46:18,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=3969, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4093, PETRI_PLACES=320, PETRI_TRANSITIONS=395} [2024-06-21 16:46:18,217 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 275 predicate places. [2024-06-21 16:46:18,218 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 395 transitions, 4093 flow [2024-06-21 16:46:18,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:18,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:18,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:18,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-21 16:46:18,218 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:18,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:18,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1185394228, now seen corresponding path program 1 times [2024-06-21 16:46:18,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:18,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103658630] [2024-06-21 16:46:18,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:18,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:18,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:19,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:19,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103658630] [2024-06-21 16:46:19,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103658630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:19,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:19,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:46:19,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500958463] [2024-06-21 16:46:19,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:19,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:46:19,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:19,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:46:19,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:46:19,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:19,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 395 transitions, 4093 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:19,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:19,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:19,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:21,125 INFO L124 PetriNetUnfolderBase]: 3913/6345 cut-off events. [2024-06-21 16:46:21,125 INFO L125 PetriNetUnfolderBase]: For 1698865/1698867 co-relation queries the response was YES. [2024-06-21 16:46:21,189 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67567 conditions, 6345 events. 3913/6345 cut-off events. For 1698865/1698867 co-relation queries the response was YES. Maximal size of possible extension queue 349. Compared 39851 event pairs, 856 based on Foata normal form. 12/6357 useless extension candidates. Maximal degree in co-relation 67412. Up to 5001 conditions per place. [2024-06-21 16:46:21,218 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 330 selfloop transitions, 87 changer transitions 0/448 dead transitions. [2024-06-21 16:46:21,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 448 transitions, 5229 flow [2024-06-21 16:46:21,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:46:21,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:46:21,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 211 transitions. [2024-06-21 16:46:21,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47954545454545455 [2024-06-21 16:46:21,219 INFO L175 Difference]: Start difference. First operand has 320 places, 395 transitions, 4093 flow. Second operand 10 states and 211 transitions. [2024-06-21 16:46:21,219 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 448 transitions, 5229 flow [2024-06-21 16:46:24,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 448 transitions, 5137 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:24,541 INFO L231 Difference]: Finished difference. Result has 326 places, 406 transitions, 4366 flow [2024-06-21 16:46:24,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4001, PETRI_DIFFERENCE_MINUEND_PLACES=314, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=395, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4366, PETRI_PLACES=326, PETRI_TRANSITIONS=406} [2024-06-21 16:46:24,542 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 281 predicate places. [2024-06-21 16:46:24,542 INFO L495 AbstractCegarLoop]: Abstraction has has 326 places, 406 transitions, 4366 flow [2024-06-21 16:46:24,542 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:24,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:24,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:24,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-21 16:46:24,542 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:24,543 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:24,543 INFO L85 PathProgramCache]: Analyzing trace with hash -1012200091, now seen corresponding path program 2 times [2024-06-21 16:46:24,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:24,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243621134] [2024-06-21 16:46:24,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:24,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:24,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:25,408 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:25,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:25,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243621134] [2024-06-21 16:46:25,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243621134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:25,409 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:25,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:46:25,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1140638250] [2024-06-21 16:46:25,409 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:25,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:46:25,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:25,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:46:25,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:46:25,530 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:25,530 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 326 places, 406 transitions, 4366 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:25,530 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:25,530 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:25,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:26,819 INFO L124 PetriNetUnfolderBase]: 3874/6292 cut-off events. [2024-06-21 16:46:26,819 INFO L125 PetriNetUnfolderBase]: For 1723466/1723468 co-relation queries the response was YES. [2024-06-21 16:46:26,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69217 conditions, 6292 events. 3874/6292 cut-off events. For 1723466/1723468 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 39936 event pairs, 863 based on Foata normal form. 4/6248 useless extension candidates. Maximal degree in co-relation 69059. Up to 5614 conditions per place. [2024-06-21 16:46:26,917 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 338 selfloop transitions, 68 changer transitions 0/439 dead transitions. [2024-06-21 16:46:26,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 439 transitions, 6100 flow [2024-06-21 16:46:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:46:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:46:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:46:26,918 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 16:46:26,919 INFO L175 Difference]: Start difference. First operand has 326 places, 406 transitions, 4366 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:46:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 439 transitions, 6100 flow [2024-06-21 16:46:30,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 439 transitions, 5924 flow, removed 19 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:30,327 INFO L231 Difference]: Finished difference. Result has 329 places, 418 transitions, 4754 flow [2024-06-21 16:46:30,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=318, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4754, PETRI_PLACES=329, PETRI_TRANSITIONS=418} [2024-06-21 16:46:30,327 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 284 predicate places. [2024-06-21 16:46:30,327 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 418 transitions, 4754 flow [2024-06-21 16:46:30,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:30,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:30,328 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:30,328 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-21 16:46:30,328 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:30,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:30,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1012603711, now seen corresponding path program 3 times [2024-06-21 16:46:30,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:30,329 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856253553] [2024-06-21 16:46:30,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:30,329 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:30,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:31,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:31,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:31,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856253553] [2024-06-21 16:46:31,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856253553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:31,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:31,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:46:31,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934175190] [2024-06-21 16:46:31,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:31,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:46:31,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:31,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:46:31,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:46:31,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:31,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 418 transitions, 4754 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:31,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:31,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:31,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:32,685 INFO L124 PetriNetUnfolderBase]: 3876/6294 cut-off events. [2024-06-21 16:46:32,685 INFO L125 PetriNetUnfolderBase]: For 1751752/1751754 co-relation queries the response was YES. [2024-06-21 16:46:32,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69872 conditions, 6294 events. 3876/6294 cut-off events. For 1751752/1751754 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39833 event pairs, 869 based on Foata normal form. 4/6250 useless extension candidates. Maximal degree in co-relation 69714. Up to 5618 conditions per place. [2024-06-21 16:46:32,779 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 336 selfloop transitions, 73 changer transitions 0/442 dead transitions. [2024-06-21 16:46:32,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 337 places, 442 transitions, 6219 flow [2024-06-21 16:46:32,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:46:32,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:46:32,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 178 transitions. [2024-06-21 16:46:32,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4494949494949495 [2024-06-21 16:46:32,780 INFO L175 Difference]: Start difference. First operand has 329 places, 418 transitions, 4754 flow. Second operand 9 states and 178 transitions. [2024-06-21 16:46:32,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 337 places, 442 transitions, 6219 flow [2024-06-21 16:46:35,943 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 442 transitions, 5991 flow, removed 95 selfloop flow, removed 4 redundant places. [2024-06-21 16:46:35,948 INFO L231 Difference]: Finished difference. Result has 334 places, 422 transitions, 4816 flow [2024-06-21 16:46:35,948 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4546, PETRI_DIFFERENCE_MINUEND_PLACES=325, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=418, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4816, PETRI_PLACES=334, PETRI_TRANSITIONS=422} [2024-06-21 16:46:35,948 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 289 predicate places. [2024-06-21 16:46:35,949 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 422 transitions, 4816 flow [2024-06-21 16:46:35,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:35,949 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:35,949 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:35,949 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-21 16:46:35,949 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:35,950 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:35,950 INFO L85 PathProgramCache]: Analyzing trace with hash -1012185645, now seen corresponding path program 1 times [2024-06-21 16:46:35,950 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:35,950 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256203305] [2024-06-21 16:46:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:35,950 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:35,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:36,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:36,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:36,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256203305] [2024-06-21 16:46:36,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256203305] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:36,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:36,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:46:36,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240917875] [2024-06-21 16:46:36,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:36,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:46:36,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:36,844 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:46:36,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:46:36,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:36,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 422 transitions, 4816 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:36,935 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:36,935 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:36,935 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:38,273 INFO L124 PetriNetUnfolderBase]: 3881/6300 cut-off events. [2024-06-21 16:46:38,273 INFO L125 PetriNetUnfolderBase]: For 1771083/1771083 co-relation queries the response was YES. [2024-06-21 16:46:38,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70103 conditions, 6300 events. 3881/6300 cut-off events. For 1771083/1771083 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39872 event pairs, 867 based on Foata normal form. 1/6253 useless extension candidates. Maximal degree in co-relation 69943. Up to 5829 conditions per place. [2024-06-21 16:46:38,372 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 390 selfloop transitions, 20 changer transitions 0/443 dead transitions. [2024-06-21 16:46:38,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 342 places, 443 transitions, 5796 flow [2024-06-21 16:46:38,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:46:38,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:46:38,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:46:38,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-21 16:46:38,374 INFO L175 Difference]: Start difference. First operand has 334 places, 422 transitions, 4816 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:46:38,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 342 places, 443 transitions, 5796 flow [2024-06-21 16:46:41,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 443 transitions, 5601 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:41,675 INFO L231 Difference]: Finished difference. Result has 337 places, 425 transitions, 4789 flow [2024-06-21 16:46:41,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4621, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=422, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4789, PETRI_PLACES=337, PETRI_TRANSITIONS=425} [2024-06-21 16:46:41,677 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 292 predicate places. [2024-06-21 16:46:41,677 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 425 transitions, 4789 flow [2024-06-21 16:46:41,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:41,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:41,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:41,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-21 16:46:41,678 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:41,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:41,679 INFO L85 PathProgramCache]: Analyzing trace with hash 803701981, now seen corresponding path program 4 times [2024-06-21 16:46:41,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:41,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215201974] [2024-06-21 16:46:41,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:41,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:41,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:42,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:42,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:42,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215201974] [2024-06-21 16:46:42,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [215201974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:42,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:42,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:46:42,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179022613] [2024-06-21 16:46:42,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:42,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:46:42,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:42,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:46:42,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:46:42,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:42,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 425 transitions, 4789 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:42,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:42,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:42,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:44,252 INFO L124 PetriNetUnfolderBase]: 3887/6307 cut-off events. [2024-06-21 16:46:44,252 INFO L125 PetriNetUnfolderBase]: For 1778671/1778673 co-relation queries the response was YES. [2024-06-21 16:46:44,323 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70221 conditions, 6307 events. 3887/6307 cut-off events. For 1778671/1778673 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39846 event pairs, 868 based on Foata normal form. 4/6263 useless extension candidates. Maximal degree in co-relation 70060. Up to 5623 conditions per place. [2024-06-21 16:46:44,352 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 341 selfloop transitions, 71 changer transitions 0/445 dead transitions. [2024-06-21 16:46:44,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 345 places, 445 transitions, 6133 flow [2024-06-21 16:46:44,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:46:44,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:46:44,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 16:46:44,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:46:44,353 INFO L175 Difference]: Start difference. First operand has 337 places, 425 transitions, 4789 flow. Second operand 9 states and 176 transitions. [2024-06-21 16:46:44,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 345 places, 445 transitions, 6133 flow [2024-06-21 16:46:47,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 445 transitions, 5907 flow, removed 95 selfloop flow, removed 7 redundant places. [2024-06-21 16:46:47,459 INFO L231 Difference]: Finished difference. Result has 339 places, 425 transitions, 4713 flow [2024-06-21 16:46:47,459 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4563, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=354, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4713, PETRI_PLACES=339, PETRI_TRANSITIONS=425} [2024-06-21 16:46:47,459 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-21 16:46:47,459 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 425 transitions, 4713 flow [2024-06-21 16:46:47,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:47,460 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:47,460 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:47,460 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-21 16:46:47,460 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:47,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:47,460 INFO L85 PathProgramCache]: Analyzing trace with hash -502812885, now seen corresponding path program 4 times [2024-06-21 16:46:47,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:47,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443070823] [2024-06-21 16:46:47,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:47,461 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:47,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:48,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:48,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443070823] [2024-06-21 16:46:48,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443070823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:48,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:48,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:48,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571826936] [2024-06-21 16:46:48,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:48,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:48,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:48,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:48,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:48,511 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:46:48,511 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 425 transitions, 4713 flow. Second operand has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:48,511 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:48,511 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:46:48,511 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:49,842 INFO L124 PetriNetUnfolderBase]: 3800/6224 cut-off events. [2024-06-21 16:46:49,842 INFO L125 PetriNetUnfolderBase]: For 1814050/1814052 co-relation queries the response was YES. [2024-06-21 16:46:49,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69869 conditions, 6224 events. 3800/6224 cut-off events. For 1814050/1814052 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39781 event pairs, 867 based on Foata normal form. 6/6181 useless extension candidates. Maximal degree in co-relation 69707. Up to 5440 conditions per place. [2024-06-21 16:46:49,936 INFO L140 encePairwiseOnDemand]: 34/44 looper letters, 325 selfloop transitions, 56 changer transitions 0/440 dead transitions. [2024-06-21 16:46:49,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 440 transitions, 5645 flow [2024-06-21 16:46:49,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:49,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:46:49,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:46:49,938 INFO L175 Difference]: Start difference. First operand has 339 places, 425 transitions, 4713 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:46:49,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 440 transitions, 5645 flow [2024-06-21 16:46:53,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 440 transitions, 5472 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-21 16:46:53,438 INFO L231 Difference]: Finished difference. Result has 339 places, 428 transitions, 4806 flow [2024-06-21 16:46:53,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4540, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4806, PETRI_PLACES=339, PETRI_TRANSITIONS=428} [2024-06-21 16:46:53,439 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 294 predicate places. [2024-06-21 16:46:53,439 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 428 transitions, 4806 flow [2024-06-21 16:46:53,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 13.666666666666666) internal successors, (123), 9 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:53,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:53,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:53,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-21 16:46:53,440 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:53,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:53,440 INFO L85 PathProgramCache]: Analyzing trace with hash 2127532283, now seen corresponding path program 4 times [2024-06-21 16:46:53,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:53,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420800995] [2024-06-21 16:46:53,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:53,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:54,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:54,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:54,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420800995] [2024-06-21 16:46:54,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420800995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:54,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:54,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:54,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357934647] [2024-06-21 16:46:54,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:54,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:54,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:54,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:54,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:54,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:54,149 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 428 transitions, 4806 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:54,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:54,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:54,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:46:55,568 INFO L124 PetriNetUnfolderBase]: 3971/6424 cut-off events. [2024-06-21 16:46:55,568 INFO L125 PetriNetUnfolderBase]: For 1825276/1825276 co-relation queries the response was YES. [2024-06-21 16:46:55,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71422 conditions, 6424 events. 3971/6424 cut-off events. For 1825276/1825276 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40340 event pairs, 898 based on Foata normal form. 1/6424 useless extension candidates. Maximal degree in co-relation 71260. Up to 5820 conditions per place. [2024-06-21 16:46:55,663 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 378 selfloop transitions, 42 changer transitions 0/451 dead transitions. [2024-06-21 16:46:55,663 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 451 transitions, 5806 flow [2024-06-21 16:46:55,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:46:55,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:46:55,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:46:55,680 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:46:55,680 INFO L175 Difference]: Start difference. First operand has 339 places, 428 transitions, 4806 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:46:55,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 451 transitions, 5806 flow [2024-06-21 16:46:58,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 451 transitions, 5562 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-21 16:46:58,795 INFO L231 Difference]: Finished difference. Result has 341 places, 431 transitions, 4768 flow [2024-06-21 16:46:58,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4562, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4768, PETRI_PLACES=341, PETRI_TRANSITIONS=431} [2024-06-21 16:46:58,795 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 296 predicate places. [2024-06-21 16:46:58,795 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 431 transitions, 4768 flow [2024-06-21 16:46:58,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:58,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:46:58,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:46:58,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-21 16:46:58,796 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:46:58,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:46:58,797 INFO L85 PathProgramCache]: Analyzing trace with hash -325674509, now seen corresponding path program 5 times [2024-06-21 16:46:58,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:46:58,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845169216] [2024-06-21 16:46:58,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:46:58,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:46:58,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:46:59,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:46:59,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:46:59,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845169216] [2024-06-21 16:46:59,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845169216] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:46:59,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:46:59,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:46:59,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333664881] [2024-06-21 16:46:59,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:46:59,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:46:59,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:46:59,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:46:59,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:46:59,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:46:59,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 431 transitions, 4768 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:46:59,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:46:59,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:46:59,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:01,019 INFO L124 PetriNetUnfolderBase]: 3976/6431 cut-off events. [2024-06-21 16:47:01,019 INFO L125 PetriNetUnfolderBase]: For 1853068/1853068 co-relation queries the response was YES. [2024-06-21 16:47:01,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71589 conditions, 6431 events. 3976/6431 cut-off events. For 1853068/1853068 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40349 event pairs, 898 based on Foata normal form. 1/6431 useless extension candidates. Maximal degree in co-relation 71426. Up to 5817 conditions per place. [2024-06-21 16:47:01,119 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 374 selfloop transitions, 50 changer transitions 0/455 dead transitions. [2024-06-21 16:47:01,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 455 transitions, 6134 flow [2024-06-21 16:47:01,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:01,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:01,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:47:01,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:47:01,121 INFO L175 Difference]: Start difference. First operand has 341 places, 431 transitions, 4768 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:47:01,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 455 transitions, 6134 flow [2024-06-21 16:47:04,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 455 transitions, 5954 flow, removed 50 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:04,151 INFO L231 Difference]: Finished difference. Result has 343 places, 437 transitions, 4932 flow [2024-06-21 16:47:04,151 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4588, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4932, PETRI_PLACES=343, PETRI_TRANSITIONS=437} [2024-06-21 16:47:04,151 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 298 predicate places. [2024-06-21 16:47:04,151 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 437 transitions, 4932 flow [2024-06-21 16:47:04,152 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:04,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:04,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:04,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-21 16:47:04,152 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:04,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:04,153 INFO L85 PathProgramCache]: Analyzing trace with hash -142144363, now seen corresponding path program 4 times [2024-06-21 16:47:04,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:04,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131394551] [2024-06-21 16:47:04,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:04,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:04,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:04,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:04,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:04,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131394551] [2024-06-21 16:47:04,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131394551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:04,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:04,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:04,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204852186] [2024-06-21 16:47:04,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:04,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:04,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:04,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:04,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:04,904 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:04,905 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 437 transitions, 4932 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:04,905 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:04,905 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:04,905 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:06,358 INFO L124 PetriNetUnfolderBase]: 3893/6320 cut-off events. [2024-06-21 16:47:06,359 INFO L125 PetriNetUnfolderBase]: For 1868777/1868777 co-relation queries the response was YES. [2024-06-21 16:47:06,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71012 conditions, 6320 events. 3893/6320 cut-off events. For 1868777/1868777 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39942 event pairs, 883 based on Foata normal form. 1/6272 useless extension candidates. Maximal degree in co-relation 70848. Up to 5770 conditions per place. [2024-06-21 16:47:06,458 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 392 selfloop transitions, 26 changer transitions 0/454 dead transitions. [2024-06-21 16:47:06,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 454 transitions, 5810 flow [2024-06-21 16:47:06,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:06,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:06,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:47:06,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:47:06,460 INFO L175 Difference]: Start difference. First operand has 343 places, 437 transitions, 4932 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:47:06,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 454 transitions, 5810 flow [2024-06-21 16:47:10,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 454 transitions, 5615 flow, removed 73 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:10,154 INFO L231 Difference]: Finished difference. Result has 347 places, 437 transitions, 4795 flow [2024-06-21 16:47:10,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4737, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4795, PETRI_PLACES=347, PETRI_TRANSITIONS=437} [2024-06-21 16:47:10,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 302 predicate places. [2024-06-21 16:47:10,155 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 437 transitions, 4795 flow [2024-06-21 16:47:10,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:10,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:10,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:10,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-21 16:47:10,155 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:10,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:10,156 INFO L85 PathProgramCache]: Analyzing trace with hash 85577049, now seen corresponding path program 6 times [2024-06-21 16:47:10,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:10,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157326737] [2024-06-21 16:47:10,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:10,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:10,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:10,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:10,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:10,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157326737] [2024-06-21 16:47:10,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157326737] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:10,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:10,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:10,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942057500] [2024-06-21 16:47:10,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:10,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:10,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:10,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:10,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:10,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:10,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 437 transitions, 4795 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:10,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:10,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:10,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:12,307 INFO L124 PetriNetUnfolderBase]: 3966/6416 cut-off events. [2024-06-21 16:47:12,307 INFO L125 PetriNetUnfolderBase]: For 1895903/1895903 co-relation queries the response was YES. [2024-06-21 16:47:12,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71665 conditions, 6416 events. 3966/6416 cut-off events. For 1895903/1895903 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40276 event pairs, 898 based on Foata normal form. 1/6416 useless extension candidates. Maximal degree in co-relation 71499. Up to 5815 conditions per place. [2024-06-21 16:47:12,407 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 383 selfloop transitions, 43 changer transitions 0/457 dead transitions. [2024-06-21 16:47:12,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 354 places, 457 transitions, 5697 flow [2024-06-21 16:47:12,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:12,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:12,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-21 16:47:12,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45454545454545453 [2024-06-21 16:47:12,408 INFO L175 Difference]: Start difference. First operand has 347 places, 437 transitions, 4795 flow. Second operand 8 states and 160 transitions. [2024-06-21 16:47:12,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 354 places, 457 transitions, 5697 flow [2024-06-21 16:47:15,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 457 transitions, 5412 flow, removed 52 selfloop flow, removed 10 redundant places. [2024-06-21 16:47:15,239 INFO L231 Difference]: Finished difference. Result has 345 places, 437 transitions, 4602 flow [2024-06-21 16:47:15,239 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4510, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=394, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4602, PETRI_PLACES=345, PETRI_TRANSITIONS=437} [2024-06-21 16:47:15,240 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 300 predicate places. [2024-06-21 16:47:15,240 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 437 transitions, 4602 flow [2024-06-21 16:47:15,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:15,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:15,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:15,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-21 16:47:15,240 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:15,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:15,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1712051481, now seen corresponding path program 7 times [2024-06-21 16:47:15,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:15,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794196232] [2024-06-21 16:47:15,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:15,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:15,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:15,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:15,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794196232] [2024-06-21 16:47:15,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794196232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:15,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:15,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:15,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854753650] [2024-06-21 16:47:15,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:15,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:15,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:15,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:15,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:16,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:16,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 437 transitions, 4602 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:16,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:16,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:16,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:17,431 INFO L124 PetriNetUnfolderBase]: 3971/6423 cut-off events. [2024-06-21 16:47:17,431 INFO L125 PetriNetUnfolderBase]: For 1925105/1925105 co-relation queries the response was YES. [2024-06-21 16:47:17,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71941 conditions, 6423 events. 3971/6423 cut-off events. For 1925105/1925105 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40314 event pairs, 897 based on Foata normal form. 1/6423 useless extension candidates. Maximal degree in co-relation 71774. Up to 5807 conditions per place. [2024-06-21 16:47:17,531 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 371 selfloop transitions, 55 changer transitions 0/457 dead transitions. [2024-06-21 16:47:17,531 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 457 transitions, 5618 flow [2024-06-21 16:47:17,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:17,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:17,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 159 transitions. [2024-06-21 16:47:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45170454545454547 [2024-06-21 16:47:17,532 INFO L175 Difference]: Start difference. First operand has 345 places, 437 transitions, 4602 flow. Second operand 8 states and 159 transitions. [2024-06-21 16:47:17,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 457 transitions, 5618 flow [2024-06-21 16:47:20,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 457 transitions, 5514 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:20,679 INFO L231 Difference]: Finished difference. Result has 346 places, 440 transitions, 4742 flow [2024-06-21 16:47:20,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4498, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4742, PETRI_PLACES=346, PETRI_TRANSITIONS=440} [2024-06-21 16:47:20,680 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 301 predicate places. [2024-06-21 16:47:20,680 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 440 transitions, 4742 flow [2024-06-21 16:47:20,680 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:20,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:20,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:20,680 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-21 16:47:20,681 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:20,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:20,681 INFO L85 PathProgramCache]: Analyzing trace with hash 312860797, now seen corresponding path program 5 times [2024-06-21 16:47:20,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:20,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434960338] [2024-06-21 16:47:20,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:20,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:20,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:21,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:21,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:21,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434960338] [2024-06-21 16:47:21,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434960338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:21,455 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:21,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:21,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113793003] [2024-06-21 16:47:21,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:21,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:21,456 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:21,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:21,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:21,553 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:21,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 440 transitions, 4742 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:21,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:21,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:21,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:22,918 INFO L124 PetriNetUnfolderBase]: 3908/6331 cut-off events. [2024-06-21 16:47:22,919 INFO L125 PetriNetUnfolderBase]: For 1956214/1956214 co-relation queries the response was YES. [2024-06-21 16:47:22,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72103 conditions, 6331 events. 3908/6331 cut-off events. For 1956214/1956214 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 39968 event pairs, 881 based on Foata normal form. 1/6283 useless extension candidates. Maximal degree in co-relation 71935. Up to 5762 conditions per place. [2024-06-21 16:47:23,018 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 379 selfloop transitions, 45 changer transitions 0/461 dead transitions. [2024-06-21 16:47:23,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 461 transitions, 6023 flow [2024-06-21 16:47:23,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:23,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:47:23,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:47:23,019 INFO L175 Difference]: Start difference. First operand has 346 places, 440 transitions, 4742 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:47:23,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 461 transitions, 6023 flow [2024-06-21 16:47:26,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 461 transitions, 5801 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:47:26,259 INFO L231 Difference]: Finished difference. Result has 349 places, 446 transitions, 4783 flow [2024-06-21 16:47:26,259 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4520, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4783, PETRI_PLACES=349, PETRI_TRANSITIONS=446} [2024-06-21 16:47:26,259 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 304 predicate places. [2024-06-21 16:47:26,259 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 446 transitions, 4783 flow [2024-06-21 16:47:26,260 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:26,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:26,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:26,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-21 16:47:26,260 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:26,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:26,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1884304221, now seen corresponding path program 8 times [2024-06-21 16:47:26,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:26,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [253172917] [2024-06-21 16:47:26,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:26,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:26,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:27,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:27,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:27,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [253172917] [2024-06-21 16:47:27,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [253172917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:27,056 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:27,056 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:27,056 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019292151] [2024-06-21 16:47:27,056 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:27,056 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:27,056 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:27,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:27,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:27,127 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:27,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 446 transitions, 4783 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:27,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:27,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:27,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:28,580 INFO L124 PetriNetUnfolderBase]: 3997/6459 cut-off events. [2024-06-21 16:47:28,580 INFO L125 PetriNetUnfolderBase]: For 2005697/2005697 co-relation queries the response was YES. [2024-06-21 16:47:28,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73423 conditions, 6459 events. 3997/6459 cut-off events. For 2005697/2005697 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 40513 event pairs, 896 based on Foata normal form. 1/6459 useless extension candidates. Maximal degree in co-relation 73253. Up to 5804 conditions per place. [2024-06-21 16:47:28,686 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 356 selfloop transitions, 78 changer transitions 0/467 dead transitions. [2024-06-21 16:47:28,687 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 467 transitions, 6195 flow [2024-06-21 16:47:28,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:28,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:47:28,688 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:47:28,688 INFO L175 Difference]: Start difference. First operand has 349 places, 446 transitions, 4783 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:47:28,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 467 transitions, 6195 flow [2024-06-21 16:47:32,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 467 transitions, 6061 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-21 16:47:32,284 INFO L231 Difference]: Finished difference. Result has 352 places, 452 transitions, 5073 flow [2024-06-21 16:47:32,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4649, PETRI_DIFFERENCE_MINUEND_PLACES=344, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=446, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5073, PETRI_PLACES=352, PETRI_TRANSITIONS=452} [2024-06-21 16:47:32,285 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 307 predicate places. [2024-06-21 16:47:32,285 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 452 transitions, 5073 flow [2024-06-21 16:47:32,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:32,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:32,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:32,285 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-21 16:47:32,286 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:32,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:32,286 INFO L85 PathProgramCache]: Analyzing trace with hash 1884541371, now seen corresponding path program 9 times [2024-06-21 16:47:32,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:32,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039161380] [2024-06-21 16:47:32,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:32,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:32,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:33,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:33,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:33,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039161380] [2024-06-21 16:47:33,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039161380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:33,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:33,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:33,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112172080] [2024-06-21 16:47:33,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:33,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:33,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:33,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:33,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:33,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:33,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 452 transitions, 5073 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:33,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:33,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:33,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:34,516 INFO L124 PetriNetUnfolderBase]: 3996/6459 cut-off events. [2024-06-21 16:47:34,516 INFO L125 PetriNetUnfolderBase]: For 2030287/2030287 co-relation queries the response was YES. [2024-06-21 16:47:34,599 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73835 conditions, 6459 events. 3996/6459 cut-off events. For 2030287/2030287 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 40580 event pairs, 897 based on Foata normal form. 1/6459 useless extension candidates. Maximal degree in co-relation 73664. Up to 5803 conditions per place. [2024-06-21 16:47:34,628 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 354 selfloop transitions, 79 changer transitions 0/466 dead transitions. [2024-06-21 16:47:34,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 466 transitions, 5973 flow [2024-06-21 16:47:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:34,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:34,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-21 16:47:34,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44886363636363635 [2024-06-21 16:47:34,632 INFO L175 Difference]: Start difference. First operand has 352 places, 452 transitions, 5073 flow. Second operand 8 states and 158 transitions. [2024-06-21 16:47:34,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 466 transitions, 5973 flow [2024-06-21 16:47:39,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 466 transitions, 5657 flow, removed 117 selfloop flow, removed 4 redundant places. [2024-06-21 16:47:39,019 INFO L231 Difference]: Finished difference. Result has 356 places, 452 transitions, 4921 flow [2024-06-21 16:47:39,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4757, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4921, PETRI_PLACES=356, PETRI_TRANSITIONS=452} [2024-06-21 16:47:39,020 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 311 predicate places. [2024-06-21 16:47:39,021 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 452 transitions, 4921 flow [2024-06-21 16:47:39,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:39,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:39,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:39,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-21 16:47:39,023 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:39,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:39,024 INFO L85 PathProgramCache]: Analyzing trace with hash 1884779699, now seen corresponding path program 6 times [2024-06-21 16:47:39,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:39,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1243933722] [2024-06-21 16:47:39,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:39,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:39,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:39,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:39,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:39,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1243933722] [2024-06-21 16:47:39,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1243933722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:39,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:39,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:47:39,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398013976] [2024-06-21 16:47:39,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:39,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:47:39,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:39,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:47:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:47:39,917 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:39,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 452 transitions, 4921 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:39,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:39,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:39,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:41,367 INFO L124 PetriNetUnfolderBase]: 3915/6343 cut-off events. [2024-06-21 16:47:41,367 INFO L125 PetriNetUnfolderBase]: For 2041520/2041520 co-relation queries the response was YES. [2024-06-21 16:47:41,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73090 conditions, 6343 events. 3915/6343 cut-off events. For 2041520/2041520 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39979 event pairs, 882 based on Foata normal form. 1/6295 useless extension candidates. Maximal degree in co-relation 72917. Up to 5769 conditions per place. [2024-06-21 16:47:41,474 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 380 selfloop transitions, 47 changer transitions 0/466 dead transitions. [2024-06-21 16:47:41,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 466 transitions, 5809 flow [2024-06-21 16:47:41,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:47:41,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:47:41,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:47:41,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:47:41,476 INFO L175 Difference]: Start difference. First operand has 356 places, 452 transitions, 4921 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:47:41,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 466 transitions, 5809 flow [2024-06-21 16:47:45,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 466 transitions, 5587 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:45,062 INFO L231 Difference]: Finished difference. Result has 357 places, 452 transitions, 4799 flow [2024-06-21 16:47:45,062 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4699, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=405, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4799, PETRI_PLACES=357, PETRI_TRANSITIONS=452} [2024-06-21 16:47:45,063 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 312 predicate places. [2024-06-21 16:47:45,063 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 452 transitions, 4799 flow [2024-06-21 16:47:45,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:45,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:45,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:45,063 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-21 16:47:45,063 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:45,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:45,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1053876684, now seen corresponding path program 2 times [2024-06-21 16:47:45,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:45,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498406162] [2024-06-21 16:47:45,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:45,064 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:45,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:46,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:46,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498406162] [2024-06-21 16:47:46,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498406162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:46,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:46,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:47:46,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832814784] [2024-06-21 16:47:46,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:46,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:47:46,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:46,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:47:46,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:47:46,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:46,418 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 452 transitions, 4799 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:46,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:46,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:46,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:48,252 INFO L124 PetriNetUnfolderBase]: 4101/6674 cut-off events. [2024-06-21 16:47:48,252 INFO L125 PetriNetUnfolderBase]: For 2136493/2136495 co-relation queries the response was YES. [2024-06-21 16:47:48,322 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75116 conditions, 6674 events. 4101/6674 cut-off events. For 2136493/2136495 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42548 event pairs, 905 based on Foata normal form. 14/6687 useless extension candidates. Maximal degree in co-relation 74942. Up to 5596 conditions per place. [2024-06-21 16:47:48,348 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 378 selfloop transitions, 86 changer transitions 0/497 dead transitions. [2024-06-21 16:47:48,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 497 transitions, 5976 flow [2024-06-21 16:47:48,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:47:48,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:47:48,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 207 transitions. [2024-06-21 16:47:48,350 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47045454545454546 [2024-06-21 16:47:48,350 INFO L175 Difference]: Start difference. First operand has 357 places, 452 transitions, 4799 flow. Second operand 10 states and 207 transitions. [2024-06-21 16:47:48,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 497 transitions, 5976 flow [2024-06-21 16:47:51,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 497 transitions, 5878 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:47:51,946 INFO L231 Difference]: Finished difference. Result has 362 places, 458 transitions, 4992 flow [2024-06-21 16:47:51,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4701, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4992, PETRI_PLACES=362, PETRI_TRANSITIONS=458} [2024-06-21 16:47:51,947 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 317 predicate places. [2024-06-21 16:47:51,947 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 458 transitions, 4992 flow [2024-06-21 16:47:51,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:51,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:47:51,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:47:51,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-21 16:47:51,947 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:47:51,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:47:51,948 INFO L85 PathProgramCache]: Analyzing trace with hash -251412360, now seen corresponding path program 3 times [2024-06-21 16:47:51,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:47:51,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515384423] [2024-06-21 16:47:51,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:47:51,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:47:51,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:47:52,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:47:52,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:47:52,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515384423] [2024-06-21 16:47:52,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515384423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:47:52,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:47:52,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:47:52,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623919496] [2024-06-21 16:47:52,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:47:52,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:47:52,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:47:52,971 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:47:52,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:47:53,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:47:53,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 458 transitions, 4992 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:47:53,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:47:53,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:47:53,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:47:54,952 INFO L124 PetriNetUnfolderBase]: 4183/6826 cut-off events. [2024-06-21 16:47:54,953 INFO L125 PetriNetUnfolderBase]: For 2174503/2174505 co-relation queries the response was YES. [2024-06-21 16:47:55,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76842 conditions, 6826 events. 4183/6826 cut-off events. For 2174503/2174505 co-relation queries the response was YES. Maximal size of possible extension queue 392. Compared 43995 event pairs, 930 based on Foata normal form. 14/6839 useless extension candidates. Maximal degree in co-relation 76665. Up to 5738 conditions per place. [2024-06-21 16:47:55,065 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 375 selfloop transitions, 97 changer transitions 0/505 dead transitions. [2024-06-21 16:47:55,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 505 transitions, 6224 flow [2024-06-21 16:47:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:47:55,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:47:55,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-21 16:47:55,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4681818181818182 [2024-06-21 16:47:55,067 INFO L175 Difference]: Start difference. First operand has 362 places, 458 transitions, 4992 flow. Second operand 10 states and 206 transitions. [2024-06-21 16:47:55,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 505 transitions, 6224 flow [2024-06-21 16:48:00,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 505 transitions, 6031 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-21 16:48:00,497 INFO L231 Difference]: Finished difference. Result has 369 places, 467 transitions, 5180 flow [2024-06-21 16:48:00,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4809, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=458, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5180, PETRI_PLACES=369, PETRI_TRANSITIONS=467} [2024-06-21 16:48:00,497 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 324 predicate places. [2024-06-21 16:48:00,497 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 467 transitions, 5180 flow [2024-06-21 16:48:00,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:00,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:00,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:00,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-21 16:48:00,498 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:00,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:00,498 INFO L85 PathProgramCache]: Analyzing trace with hash 2111539320, now seen corresponding path program 4 times [2024-06-21 16:48:00,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:00,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [330388637] [2024-06-21 16:48:00,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:00,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:00,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:01,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:01,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:01,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [330388637] [2024-06-21 16:48:01,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [330388637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:01,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:01,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:48:01,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968905885] [2024-06-21 16:48:01,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:01,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:48:01,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:01,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:48:01,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:48:01,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:01,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 467 transitions, 5180 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:01,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:01,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:01,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:03,523 INFO L124 PetriNetUnfolderBase]: 4245/6956 cut-off events. [2024-06-21 16:48:03,524 INFO L125 PetriNetUnfolderBase]: For 2146499/2146501 co-relation queries the response was YES. [2024-06-21 16:48:03,606 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76652 conditions, 6956 events. 4245/6956 cut-off events. For 2146499/2146501 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 45297 event pairs, 946 based on Foata normal form. 14/6969 useless extension candidates. Maximal degree in co-relation 76472. Up to 5756 conditions per place. [2024-06-21 16:48:03,639 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 385 selfloop transitions, 89 changer transitions 0/507 dead transitions. [2024-06-21 16:48:03,639 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 507 transitions, 6310 flow [2024-06-21 16:48:03,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:48:03,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:48:03,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-21 16:48:03,641 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4727272727272727 [2024-06-21 16:48:03,641 INFO L175 Difference]: Start difference. First operand has 369 places, 467 transitions, 5180 flow. Second operand 10 states and 208 transitions. [2024-06-21 16:48:03,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 507 transitions, 6310 flow [2024-06-21 16:48:07,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 507 transitions, 6151 flow, removed 25 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:07,998 INFO L231 Difference]: Finished difference. Result has 376 places, 469 transitions, 5248 flow [2024-06-21 16:48:07,998 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5021, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5248, PETRI_PLACES=376, PETRI_TRANSITIONS=469} [2024-06-21 16:48:07,999 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-21 16:48:07,999 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 469 transitions, 5248 flow [2024-06-21 16:48:07,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:07,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:07,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:07,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-21 16:48:07,999 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:08,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:08,000 INFO L85 PathProgramCache]: Analyzing trace with hash 73328760, now seen corresponding path program 5 times [2024-06-21 16:48:08,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:08,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145845836] [2024-06-21 16:48:08,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:08,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:08,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:09,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:09,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:09,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145845836] [2024-06-21 16:48:09,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2145845836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:09,006 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:09,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:48:09,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044181364] [2024-06-21 16:48:09,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:09,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:48:09,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:09,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:48:09,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:48:09,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:09,109 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 469 transitions, 5248 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:09,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:09,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:09,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:10,814 INFO L124 PetriNetUnfolderBase]: 4229/6928 cut-off events. [2024-06-21 16:48:10,814 INFO L125 PetriNetUnfolderBase]: For 2138187/2138205 co-relation queries the response was YES. [2024-06-21 16:48:10,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75216 conditions, 6928 events. 4229/6928 cut-off events. For 2138187/2138205 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44988 event pairs, 868 based on Foata normal form. 14/6939 useless extension candidates. Maximal degree in co-relation 75034. Up to 4783 conditions per place. [2024-06-21 16:48:10,936 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 361 selfloop transitions, 113 changer transitions 0/507 dead transitions. [2024-06-21 16:48:10,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 507 transitions, 6232 flow [2024-06-21 16:48:10,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:48:10,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:48:10,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 205 transitions. [2024-06-21 16:48:10,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4659090909090909 [2024-06-21 16:48:10,938 INFO L175 Difference]: Start difference. First operand has 376 places, 469 transitions, 5248 flow. Second operand 10 states and 205 transitions. [2024-06-21 16:48:10,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 507 transitions, 6232 flow [2024-06-21 16:48:15,164 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 507 transitions, 5854 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-21 16:48:15,169 INFO L231 Difference]: Finished difference. Result has 376 places, 468 transitions, 4982 flow [2024-06-21 16:48:15,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4752, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=113, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4982, PETRI_PLACES=376, PETRI_TRANSITIONS=468} [2024-06-21 16:48:15,169 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 331 predicate places. [2024-06-21 16:48:15,170 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 468 transitions, 4982 flow [2024-06-21 16:48:15,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:15,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:15,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:15,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-21 16:48:15,170 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)] === [2024-06-21 16:48:15,170 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:15,170 INFO L85 PathProgramCache]: Analyzing trace with hash 1038426973, now seen corresponding path program 10 times [2024-06-21 16:48:15,170 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:15,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312860777] [2024-06-21 16:48:15,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:15,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:15,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:15,948 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:15,948 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:15,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312860777] [2024-06-21 16:48:15,949 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312860777] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:15,949 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:15,949 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:15,949 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227073317] [2024-06-21 16:48:15,949 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:15,949 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:15,949 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:15,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:15,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:16,014 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:16,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 468 transitions, 4982 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:16,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:16,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:16,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:17,491 INFO L124 PetriNetUnfolderBase]: 4235/6939 cut-off events. [2024-06-21 16:48:17,491 INFO L125 PetriNetUnfolderBase]: For 2097553/2097555 co-relation queries the response was YES. [2024-06-21 16:48:17,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74822 conditions, 6939 events. 4235/6939 cut-off events. For 2097553/2097555 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 45111 event pairs, 979 based on Foata normal form. 4/6942 useless extension candidates. Maximal degree in co-relation 74641. Up to 6102 conditions per place. [2024-06-21 16:48:17,608 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 361 selfloop transitions, 95 changer transitions 0/489 dead transitions. [2024-06-21 16:48:17,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 489 transitions, 6776 flow [2024-06-21 16:48:17,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:17,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:17,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:48:17,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:48:17,609 INFO L175 Difference]: Start difference. First operand has 376 places, 468 transitions, 4982 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:48:17,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 489 transitions, 6776 flow [2024-06-21 16:48:22,685 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 489 transitions, 6453 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-21 16:48:22,689 INFO L231 Difference]: Finished difference. Result has 375 places, 475 transitions, 5126 flow [2024-06-21 16:48:22,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4659, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=468, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=376, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5126, PETRI_PLACES=375, PETRI_TRANSITIONS=475} [2024-06-21 16:48:22,695 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 330 predicate places. [2024-06-21 16:48:22,695 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 475 transitions, 5126 flow [2024-06-21 16:48:22,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:22,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:22,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:22,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-21 16:48:22,695 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)] === [2024-06-21 16:48:22,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:22,696 INFO L85 PathProgramCache]: Analyzing trace with hash -668114243, now seen corresponding path program 7 times [2024-06-21 16:48:22,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:22,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849686425] [2024-06-21 16:48:22,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:22,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:22,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:23,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:23,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:23,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849686425] [2024-06-21 16:48:23,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849686425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:23,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:23,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:23,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297489987] [2024-06-21 16:48:23,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:23,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:23,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:23,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:23,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:23,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:23,594 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 475 transitions, 5126 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:23,594 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:23,594 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:23,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:25,026 INFO L124 PetriNetUnfolderBase]: 4185/6856 cut-off events. [2024-06-21 16:48:25,026 INFO L125 PetriNetUnfolderBase]: For 2142762/2142764 co-relation queries the response was YES. [2024-06-21 16:48:25,108 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74489 conditions, 6856 events. 4185/6856 cut-off events. For 2142762/2142764 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44725 event pairs, 944 based on Foata normal form. 4/6811 useless extension candidates. Maximal degree in co-relation 74308. Up to 6041 conditions per place. [2024-06-21 16:48:25,137 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 351 selfloop transitions, 106 changer transitions 0/498 dead transitions. [2024-06-21 16:48:25,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 498 transitions, 6857 flow [2024-06-21 16:48:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:25,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:25,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:48:25,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:48:25,138 INFO L175 Difference]: Start difference. First operand has 375 places, 475 transitions, 5126 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:48:25,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 498 transitions, 6857 flow [2024-06-21 16:48:29,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 498 transitions, 6543 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-21 16:48:29,132 INFO L231 Difference]: Finished difference. Result has 379 places, 485 transitions, 5305 flow [2024-06-21 16:48:29,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4812, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5305, PETRI_PLACES=379, PETRI_TRANSITIONS=485} [2024-06-21 16:48:29,132 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 334 predicate places. [2024-06-21 16:48:29,133 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 485 transitions, 5305 flow [2024-06-21 16:48:29,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:29,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:29,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:29,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-21 16:48:29,133 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)] === [2024-06-21 16:48:29,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:29,134 INFO L85 PathProgramCache]: Analyzing trace with hash 1038723891, now seen corresponding path program 8 times [2024-06-21 16:48:29,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:29,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [630043867] [2024-06-21 16:48:29,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:29,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:29,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:29,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:29,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [630043867] [2024-06-21 16:48:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [630043867] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:29,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:29,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:29,911 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024271033] [2024-06-21 16:48:29,911 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:29,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:29,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:29,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:29,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:29,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:29,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 485 transitions, 5305 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:29,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:29,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:29,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:31,537 INFO L124 PetriNetUnfolderBase]: 4179/6850 cut-off events. [2024-06-21 16:48:31,538 INFO L125 PetriNetUnfolderBase]: For 2148463/2148465 co-relation queries the response was YES. [2024-06-21 16:48:31,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73897 conditions, 6850 events. 4179/6850 cut-off events. For 2148463/2148465 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44723 event pairs, 944 based on Foata normal form. 4/6805 useless extension candidates. Maximal degree in co-relation 73714. Up to 6036 conditions per place. [2024-06-21 16:48:31,660 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 354 selfloop transitions, 103 changer transitions 0/498 dead transitions. [2024-06-21 16:48:31,660 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 498 transitions, 6789 flow [2024-06-21 16:48:31,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:31,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:31,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-21 16:48:31,661 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4460227272727273 [2024-06-21 16:48:31,661 INFO L175 Difference]: Start difference. First operand has 379 places, 485 transitions, 5305 flow. Second operand 8 states and 157 transitions. [2024-06-21 16:48:31,661 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 498 transitions, 6789 flow [2024-06-21 16:48:35,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 498 transitions, 6566 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-21 16:48:35,718 INFO L231 Difference]: Finished difference. Result has 383 places, 485 transitions, 5297 flow [2024-06-21 16:48:35,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5082, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5297, PETRI_PLACES=383, PETRI_TRANSITIONS=485} [2024-06-21 16:48:35,719 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 338 predicate places. [2024-06-21 16:48:35,719 INFO L495 AbstractCegarLoop]: Abstraction has has 383 places, 485 transitions, 5297 flow [2024-06-21 16:48:35,719 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:35,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:35,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:35,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-21 16:48:35,720 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:35,720 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:35,720 INFO L85 PathProgramCache]: Analyzing trace with hash -45696805, now seen corresponding path program 9 times [2024-06-21 16:48:35,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:35,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136804279] [2024-06-21 16:48:35,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:35,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:35,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:36,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:36,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:36,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136804279] [2024-06-21 16:48:36,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136804279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:36,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:36,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:36,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030562812] [2024-06-21 16:48:36,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:36,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:36,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:36,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:36,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:36,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:36,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 383 places, 485 transitions, 5297 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:36,641 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:36,641 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:36,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:38,110 INFO L124 PetriNetUnfolderBase]: 4173/6840 cut-off events. [2024-06-21 16:48:38,110 INFO L125 PetriNetUnfolderBase]: For 2160086/2160088 co-relation queries the response was YES. [2024-06-21 16:48:38,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73702 conditions, 6840 events. 4173/6840 cut-off events. For 2160086/2160088 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 44624 event pairs, 944 based on Foata normal form. 4/6795 useless extension candidates. Maximal degree in co-relation 73518. Up to 6031 conditions per place. [2024-06-21 16:48:38,424 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 349 selfloop transitions, 108 changer transitions 0/498 dead transitions. [2024-06-21 16:48:38,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 390 places, 498 transitions, 6785 flow [2024-06-21 16:48:38,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:38,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:38,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:48:38,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:48:38,426 INFO L175 Difference]: Start difference. First operand has 383 places, 485 transitions, 5297 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:48:38,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 390 places, 498 transitions, 6785 flow [2024-06-21 16:48:42,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 498 transitions, 6503 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 16:48:42,869 INFO L231 Difference]: Finished difference. Result has 386 places, 485 transitions, 5239 flow [2024-06-21 16:48:42,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5015, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5239, PETRI_PLACES=386, PETRI_TRANSITIONS=485} [2024-06-21 16:48:42,875 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 341 predicate places. [2024-06-21 16:48:42,876 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 485 transitions, 5239 flow [2024-06-21 16:48:42,876 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:42,876 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:42,876 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:42,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-21 16:48:42,876 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:42,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:42,877 INFO L85 PathProgramCache]: Analyzing trace with hash -39982885, now seen corresponding path program 10 times [2024-06-21 16:48:42,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:42,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088234510] [2024-06-21 16:48:42,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:42,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:42,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:43,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:43,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:43,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088234510] [2024-06-21 16:48:43,673 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088234510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:43,673 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:43,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:43,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811502496] [2024-06-21 16:48:43,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:43,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:43,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:43,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:43,674 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:43,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:43,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 485 transitions, 5239 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:43,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:43,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:43,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:45,314 INFO L124 PetriNetUnfolderBase]: 4178/6849 cut-off events. [2024-06-21 16:48:45,314 INFO L125 PetriNetUnfolderBase]: For 2178497/2178499 co-relation queries the response was YES. [2024-06-21 16:48:45,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73928 conditions, 6849 events. 4178/6849 cut-off events. For 2178497/2178499 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 44741 event pairs, 945 based on Foata normal form. 3/6803 useless extension candidates. Maximal degree in co-relation 73743. Up to 6035 conditions per place. [2024-06-21 16:48:45,429 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 341 selfloop transitions, 118 changer transitions 0/500 dead transitions. [2024-06-21 16:48:45,429 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 500 transitions, 6546 flow [2024-06-21 16:48:45,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:45,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:45,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-21 16:48:45,430 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-21 16:48:45,430 INFO L175 Difference]: Start difference. First operand has 386 places, 485 transitions, 5239 flow. Second operand 8 states and 154 transitions. [2024-06-21 16:48:45,430 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 500 transitions, 6546 flow [2024-06-21 16:48:50,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 500 transitions, 6330 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-21 16:48:50,198 INFO L231 Difference]: Finished difference. Result has 388 places, 488 transitions, 5354 flow [2024-06-21 16:48:50,198 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5025, PETRI_DIFFERENCE_MINUEND_PLACES=380, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5354, PETRI_PLACES=388, PETRI_TRANSITIONS=488} [2024-06-21 16:48:50,199 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 343 predicate places. [2024-06-21 16:48:50,199 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 488 transitions, 5354 flow [2024-06-21 16:48:50,199 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:50,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:50,199 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:50,199 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-21 16:48:50,199 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:50,199 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:50,200 INFO L85 PathProgramCache]: Analyzing trace with hash -325082755, now seen corresponding path program 11 times [2024-06-21 16:48:50,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:50,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1735641652] [2024-06-21 16:48:50,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:50,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:50,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:50,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:50,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:50,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1735641652] [2024-06-21 16:48:50,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1735641652] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:50,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:50,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:50,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126935091] [2024-06-21 16:48:50,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:50,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:50,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:50,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:50,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:51,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:51,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 488 transitions, 5354 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:51,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:51,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:51,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:48:52,645 INFO L124 PetriNetUnfolderBase]: 4173/6841 cut-off events. [2024-06-21 16:48:52,645 INFO L125 PetriNetUnfolderBase]: For 2201971/2201973 co-relation queries the response was YES. [2024-06-21 16:48:52,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73975 conditions, 6841 events. 4173/6841 cut-off events. For 2201971/2201973 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44662 event pairs, 944 based on Foata normal form. 3/6795 useless extension candidates. Maximal degree in co-relation 73789. Up to 6030 conditions per place. [2024-06-21 16:48:52,764 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 338 selfloop transitions, 121 changer transitions 0/500 dead transitions. [2024-06-21 16:48:52,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 500 transitions, 6576 flow [2024-06-21 16:48:52,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:48:52,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:48:52,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:48:52,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:48:52,765 INFO L175 Difference]: Start difference. First operand has 388 places, 488 transitions, 5354 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:48:52,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 500 transitions, 6576 flow [2024-06-21 16:48:57,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 500 transitions, 6311 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-21 16:48:57,769 INFO L231 Difference]: Finished difference. Result has 391 places, 488 transitions, 5337 flow [2024-06-21 16:48:57,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5089, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5337, PETRI_PLACES=391, PETRI_TRANSITIONS=488} [2024-06-21 16:48:57,770 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 346 predicate places. [2024-06-21 16:48:57,770 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 488 transitions, 5337 flow [2024-06-21 16:48:57,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:57,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:48:57,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:48:57,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-21 16:48:57,770 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:48:57,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:48:57,771 INFO L85 PathProgramCache]: Analyzing trace with hash -325321083, now seen corresponding path program 11 times [2024-06-21 16:48:57,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:48:57,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1812807649] [2024-06-21 16:48:57,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:48:57,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:48:57,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:48:58,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:48:58,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:48:58,526 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1812807649] [2024-06-21 16:48:58,526 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1812807649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:48:58,526 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:48:58,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:48:58,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762524028] [2024-06-21 16:48:58,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:48:58,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:48:58,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:48:58,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:48:58,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:48:58,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:48:58,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 488 transitions, 5337 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:48:58,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:48:58,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:48:58,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:00,115 INFO L124 PetriNetUnfolderBase]: 4253/6962 cut-off events. [2024-06-21 16:49:00,116 INFO L125 PetriNetUnfolderBase]: For 2242825/2242827 co-relation queries the response was YES. [2024-06-21 16:49:00,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75068 conditions, 6962 events. 4253/6962 cut-off events. For 2242825/2242827 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45244 event pairs, 979 based on Foata normal form. 3/6964 useless extension candidates. Maximal degree in co-relation 74881. Up to 6119 conditions per place. [2024-06-21 16:49:00,240 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 364 selfloop transitions, 106 changer transitions 0/507 dead transitions. [2024-06-21 16:49:00,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 507 transitions, 7123 flow [2024-06-21 16:49:00,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:00,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:00,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-21 16:49:00,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4431818181818182 [2024-06-21 16:49:00,242 INFO L175 Difference]: Start difference. First operand has 391 places, 488 transitions, 5337 flow. Second operand 8 states and 156 transitions. [2024-06-21 16:49:00,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 507 transitions, 7123 flow [2024-06-21 16:49:04,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 507 transitions, 6746 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-21 16:49:04,919 INFO L231 Difference]: Finished difference. Result has 389 places, 494 transitions, 5440 flow [2024-06-21 16:49:04,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4960, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=387, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5440, PETRI_PLACES=389, PETRI_TRANSITIONS=494} [2024-06-21 16:49:04,920 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 344 predicate places. [2024-06-21 16:49:04,920 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 494 transitions, 5440 flow [2024-06-21 16:49:04,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:04,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:04,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:04,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-21 16:49:04,920 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:04,920 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:04,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1582150831, now seen corresponding path program 12 times [2024-06-21 16:49:04,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:04,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687436421] [2024-06-21 16:49:04,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:04,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:04,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:05,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:05,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:05,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687436421] [2024-06-21 16:49:05,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687436421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:05,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:05,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:05,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84733098] [2024-06-21 16:49:05,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:05,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:05,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:05,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:05,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:05,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:05,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 494 transitions, 5440 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:05,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:05,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:05,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:07,300 INFO L124 PetriNetUnfolderBase]: 4251/6961 cut-off events. [2024-06-21 16:49:07,300 INFO L125 PetriNetUnfolderBase]: For 2266300/2266302 co-relation queries the response was YES. [2024-06-21 16:49:07,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75065 conditions, 6961 events. 4251/6961 cut-off events. For 2266300/2266302 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 45258 event pairs, 979 based on Foata normal form. 3/6963 useless extension candidates. Maximal degree in co-relation 74879. Up to 6118 conditions per place. [2024-06-21 16:49:07,420 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 365 selfloop transitions, 104 changer transitions 0/506 dead transitions. [2024-06-21 16:49:07,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 506 transitions, 6686 flow [2024-06-21 16:49:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:07,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:07,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-21 16:49:07,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-06-21 16:49:07,421 INFO L175 Difference]: Start difference. First operand has 389 places, 494 transitions, 5440 flow. Second operand 8 states and 155 transitions. [2024-06-21 16:49:07,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 506 transitions, 6686 flow [2024-06-21 16:49:13,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 506 transitions, 6381 flow, removed 118 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:13,144 INFO L231 Difference]: Finished difference. Result has 393 places, 494 transitions, 5349 flow [2024-06-21 16:49:13,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5135, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5349, PETRI_PLACES=393, PETRI_TRANSITIONS=494} [2024-06-21 16:49:13,144 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 348 predicate places. [2024-06-21 16:49:13,144 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 494 transitions, 5349 flow [2024-06-21 16:49:13,144 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:13,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:13,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:13,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-21 16:49:13,145 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:13,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:13,145 INFO L85 PathProgramCache]: Analyzing trace with hash -325557985, now seen corresponding path program 12 times [2024-06-21 16:49:13,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:13,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1084858390] [2024-06-21 16:49:13,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:13,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:13,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:13,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:13,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1084858390] [2024-06-21 16:49:13,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1084858390] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:13,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:13,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-21 16:49:13,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688921623] [2024-06-21 16:49:13,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:13,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-21 16:49:13,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:13,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-21 16:49:13,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-21 16:49:13,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:13,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 494 transitions, 5349 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:13,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:14,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:14,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:15,486 INFO L124 PetriNetUnfolderBase]: 4170/6836 cut-off events. [2024-06-21 16:49:15,486 INFO L125 PetriNetUnfolderBase]: For 2270157/2270159 co-relation queries the response was YES. [2024-06-21 16:49:15,576 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74066 conditions, 6836 events. 4170/6836 cut-off events. For 2270157/2270159 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 44635 event pairs, 944 based on Foata normal form. 3/6790 useless extension candidates. Maximal degree in co-relation 73879. Up to 6027 conditions per place. [2024-06-21 16:49:15,608 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 342 selfloop transitions, 120 changer transitions 0/505 dead transitions. [2024-06-21 16:49:15,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 505 transitions, 6299 flow [2024-06-21 16:49:15,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-21 16:49:15,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-21 16:49:15,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-21 16:49:15,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4346590909090909 [2024-06-21 16:49:15,609 INFO L175 Difference]: Start difference. First operand has 393 places, 494 transitions, 5349 flow. Second operand 8 states and 153 transitions. [2024-06-21 16:49:15,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 505 transitions, 6299 flow [2024-06-21 16:49:19,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 505 transitions, 6085 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-21 16:49:19,650 INFO L231 Difference]: Finished difference. Result has 395 places, 494 transitions, 5381 flow [2024-06-21 16:49:19,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5135, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5381, PETRI_PLACES=395, PETRI_TRANSITIONS=494} [2024-06-21 16:49:19,650 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 350 predicate places. [2024-06-21 16:49:19,650 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 494 transitions, 5381 flow [2024-06-21 16:49:19,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:19,651 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:19,651 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:19,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-21 16:49:19,651 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:19,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:19,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1511620273, now seen corresponding path program 2 times [2024-06-21 16:49:19,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:19,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933498054] [2024-06-21 16:49:19,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:19,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:19,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:20,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:20,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:20,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933498054] [2024-06-21 16:49:20,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933498054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:20,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:20,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:20,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575766423] [2024-06-21 16:49:20,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:20,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:20,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:20,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:20,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:20,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:20,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 494 transitions, 5381 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:20,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:20,814 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:20,814 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:22,334 INFO L124 PetriNetUnfolderBase]: 4175/6840 cut-off events. [2024-06-21 16:49:22,335 INFO L125 PetriNetUnfolderBase]: For 2302553/2302553 co-relation queries the response was YES. [2024-06-21 16:49:22,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74439 conditions, 6840 events. 4175/6840 cut-off events. For 2302553/2302553 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 44640 event pairs, 910 based on Foata normal form. 1/6793 useless extension candidates. Maximal degree in co-relation 74251. Up to 6304 conditions per place. [2024-06-21 16:49:22,450 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 446 selfloop transitions, 20 changer transitions 0/509 dead transitions. [2024-06-21 16:49:22,450 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 509 transitions, 6473 flow [2024-06-21 16:49:22,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:22,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:22,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-21 16:49:22,454 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39646464646464646 [2024-06-21 16:49:22,454 INFO L175 Difference]: Start difference. First operand has 395 places, 494 transitions, 5381 flow. Second operand 9 states and 157 transitions. [2024-06-21 16:49:22,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 509 transitions, 6473 flow [2024-06-21 16:49:28,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 509 transitions, 6076 flow, removed 1 selfloop flow, removed 11 redundant places. [2024-06-21 16:49:28,154 INFO L231 Difference]: Finished difference. Result has 393 places, 497 transitions, 5168 flow [2024-06-21 16:49:28,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=4984, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=494, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=474, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5168, PETRI_PLACES=393, PETRI_TRANSITIONS=497} [2024-06-21 16:49:28,155 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 348 predicate places. [2024-06-21 16:49:28,155 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 497 transitions, 5168 flow [2024-06-21 16:49:28,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:28,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:28,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:28,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-21 16:49:28,156 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:28,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:28,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1511085027, now seen corresponding path program 5 times [2024-06-21 16:49:28,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:28,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394144773] [2024-06-21 16:49:28,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:28,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:28,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:29,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:29,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:29,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394144773] [2024-06-21 16:49:29,084 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394144773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:29,084 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:29,084 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:29,084 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [680340361] [2024-06-21 16:49:29,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:29,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:29,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:29,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:29,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:29,190 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:29,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 497 transitions, 5168 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:29,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:29,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:29,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:30,695 INFO L124 PetriNetUnfolderBase]: 4203/6887 cut-off events. [2024-06-21 16:49:30,695 INFO L125 PetriNetUnfolderBase]: For 2360193/2360195 co-relation queries the response was YES. [2024-06-21 16:49:30,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75427 conditions, 6887 events. 4203/6887 cut-off events. For 2360193/2360195 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 45016 event pairs, 942 based on Foata normal form. 4/6842 useless extension candidates. Maximal degree in co-relation 75238. Up to 5916 conditions per place. [2024-06-21 16:49:30,814 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 345 selfloop transitions, 144 changer transitions 0/532 dead transitions. [2024-06-21 16:49:30,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 532 transitions, 7270 flow [2024-06-21 16:49:30,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:30,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:30,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 16:49:30,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 16:49:30,816 INFO L175 Difference]: Start difference. First operand has 393 places, 497 transitions, 5168 flow. Second operand 9 states and 174 transitions. [2024-06-21 16:49:30,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 532 transitions, 7270 flow [2024-06-21 16:49:34,972 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 532 transitions, 7108 flow, removed 63 selfloop flow, removed 7 redundant places. [2024-06-21 16:49:34,977 INFO L231 Difference]: Finished difference. Result has 397 places, 516 transitions, 5790 flow [2024-06-21 16:49:34,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5006, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=497, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=359, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5790, PETRI_PLACES=397, PETRI_TRANSITIONS=516} [2024-06-21 16:49:34,978 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 352 predicate places. [2024-06-21 16:49:34,978 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 516 transitions, 5790 flow [2024-06-21 16:49:34,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:34,978 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:34,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:34,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-21 16:49:34,978 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:34,979 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:34,979 INFO L85 PathProgramCache]: Analyzing trace with hash -30031203, now seen corresponding path program 3 times [2024-06-21 16:49:34,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:34,979 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526586484] [2024-06-21 16:49:34,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:34,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:34,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:35,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:35,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:35,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526586484] [2024-06-21 16:49:35,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526586484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:35,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:35,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:35,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374723252] [2024-06-21 16:49:35,829 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:35,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:35,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:35,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:35,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:35,951 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:35,951 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 516 transitions, 5790 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:35,951 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:35,951 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:35,951 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:37,703 INFO L124 PetriNetUnfolderBase]: 4208/6891 cut-off events. [2024-06-21 16:49:37,704 INFO L125 PetriNetUnfolderBase]: For 2393457/2393461 co-relation queries the response was YES. [2024-06-21 16:49:37,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76875 conditions, 6891 events. 4208/6891 cut-off events. For 2393457/2393461 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 44905 event pairs, 917 based on Foata normal form. 5/6848 useless extension candidates. Maximal degree in co-relation 76683. Up to 6296 conditions per place. [2024-06-21 16:49:37,817 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 440 selfloop transitions, 52 changer transitions 0/535 dead transitions. [2024-06-21 16:49:37,818 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 535 transitions, 7376 flow [2024-06-21 16:49:37,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:37,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-21 16:49:37,819 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41414141414141414 [2024-06-21 16:49:37,819 INFO L175 Difference]: Start difference. First operand has 397 places, 516 transitions, 5790 flow. Second operand 9 states and 164 transitions. [2024-06-21 16:49:37,819 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 535 transitions, 7376 flow [2024-06-21 16:49:42,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 535 transitions, 7046 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-21 16:49:42,833 INFO L231 Difference]: Finished difference. Result has 402 places, 522 transitions, 5860 flow [2024-06-21 16:49:42,833 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5460, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5860, PETRI_PLACES=402, PETRI_TRANSITIONS=522} [2024-06-21 16:49:42,833 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 357 predicate places. [2024-06-21 16:49:42,833 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 522 transitions, 5860 flow [2024-06-21 16:49:42,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:42,833 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:42,834 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:42,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-21 16:49:42,834 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:42,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:42,834 INFO L85 PathProgramCache]: Analyzing trace with hash -502396369, now seen corresponding path program 6 times [2024-06-21 16:49:42,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:42,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675993040] [2024-06-21 16:49:42,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:42,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:42,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:43,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:43,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:43,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675993040] [2024-06-21 16:49:43,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675993040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:43,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:43,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:43,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963250174] [2024-06-21 16:49:43,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:43,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:43,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:43,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:43,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:43,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:43,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 522 transitions, 5860 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:43,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:43,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:43,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:45,484 INFO L124 PetriNetUnfolderBase]: 4258/6968 cut-off events. [2024-06-21 16:49:45,484 INFO L125 PetriNetUnfolderBase]: For 2491418/2491420 co-relation queries the response was YES. [2024-06-21 16:49:45,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78335 conditions, 6968 events. 4258/6968 cut-off events. For 2491418/2491420 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 45570 event pairs, 942 based on Foata normal form. 4/6923 useless extension candidates. Maximal degree in co-relation 78141. Up to 5969 conditions per place. [2024-06-21 16:49:45,604 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 376 selfloop transitions, 135 changer transitions 0/554 dead transitions. [2024-06-21 16:49:45,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 554 transitions, 8688 flow [2024-06-21 16:49:45,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:45,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:49:45,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 16:49:45,605 INFO L175 Difference]: Start difference. First operand has 402 places, 522 transitions, 5860 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:49:45,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 554 transitions, 8688 flow [2024-06-21 16:49:49,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 405 places, 554 transitions, 8492 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-21 16:49:49,994 INFO L231 Difference]: Finished difference. Result has 408 places, 535 transitions, 6395 flow [2024-06-21 16:49:49,994 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=5664, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=522, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6395, PETRI_PLACES=408, PETRI_TRANSITIONS=535} [2024-06-21 16:49:49,994 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 363 predicate places. [2024-06-21 16:49:49,994 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 535 transitions, 6395 flow [2024-06-21 16:49:49,994 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:49,995 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:49,995 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:49,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-21 16:49:49,995 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:49,995 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:49,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1495430337, now seen corresponding path program 7 times [2024-06-21 16:49:49,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:49,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752005019] [2024-06-21 16:49:49,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:49,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:50,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:50,913 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:50,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:50,914 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752005019] [2024-06-21 16:49:50,914 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752005019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:50,914 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:50,914 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:50,914 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303958632] [2024-06-21 16:49:50,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:50,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:50,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:50,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:50,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:51,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:51,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 535 transitions, 6395 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:51,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:51,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:51,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:49:52,942 INFO L124 PetriNetUnfolderBase]: 4270/6987 cut-off events. [2024-06-21 16:49:52,942 INFO L125 PetriNetUnfolderBase]: For 2528598/2528600 co-relation queries the response was YES. [2024-06-21 16:49:53,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79433 conditions, 6987 events. 4270/6987 cut-off events. For 2528598/2528600 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45656 event pairs, 943 based on Foata normal form. 4/6942 useless extension candidates. Maximal degree in co-relation 79235. Up to 5982 conditions per place. [2024-06-21 16:49:53,063 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 372 selfloop transitions, 142 changer transitions 0/557 dead transitions. [2024-06-21 16:49:53,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 557 transitions, 8690 flow [2024-06-21 16:49:53,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:49:53,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:49:53,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 16:49:53,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:49:53,064 INFO L175 Difference]: Start difference. First operand has 408 places, 535 transitions, 6395 flow. Second operand 9 states and 176 transitions. [2024-06-21 16:49:53,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 557 transitions, 8690 flow [2024-06-21 16:49:58,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 413 places, 557 transitions, 8400 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-21 16:49:58,450 INFO L231 Difference]: Finished difference. Result has 415 places, 540 transitions, 6623 flow [2024-06-21 16:49:58,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6118, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=535, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6623, PETRI_PLACES=415, PETRI_TRANSITIONS=540} [2024-06-21 16:49:58,451 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 370 predicate places. [2024-06-21 16:49:58,451 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 540 transitions, 6623 flow [2024-06-21 16:49:58,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:58,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:49:58,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:49:58,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-21 16:49:58,452 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:49:58,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:49:58,452 INFO L85 PathProgramCache]: Analyzing trace with hash -791508131, now seen corresponding path program 4 times [2024-06-21 16:49:58,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:49:58,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174342412] [2024-06-21 16:49:58,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:49:58,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:49:58,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:49:59,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:49:59,346 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:49:59,346 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174342412] [2024-06-21 16:49:59,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174342412] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:49:59,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:49:59,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:49:59,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951276117] [2024-06-21 16:49:59,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:49:59,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:49:59,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:49:59,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:49:59,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:49:59,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:49:59,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 540 transitions, 6623 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:49:59,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:49:59,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:49:59,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:01,158 INFO L124 PetriNetUnfolderBase]: 4275/6993 cut-off events. [2024-06-21 16:50:01,158 INFO L125 PetriNetUnfolderBase]: For 2555441/2555445 co-relation queries the response was YES. [2024-06-21 16:50:01,258 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79750 conditions, 6993 events. 4275/6993 cut-off events. For 2555441/2555445 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45693 event pairs, 918 based on Foata normal form. 5/6950 useless extension candidates. Maximal degree in co-relation 79550. Up to 6388 conditions per place. [2024-06-21 16:50:01,292 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 460 selfloop transitions, 53 changer transitions 0/556 dead transitions. [2024-06-21 16:50:01,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 423 places, 556 transitions, 8101 flow [2024-06-21 16:50:01,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:01,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:01,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:50:01,293 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:50:01,293 INFO L175 Difference]: Start difference. First operand has 415 places, 540 transitions, 6623 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:50:01,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 423 places, 556 transitions, 8101 flow [2024-06-21 16:50:08,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 556 transitions, 7747 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:08,720 INFO L231 Difference]: Finished difference. Result has 418 places, 543 transitions, 6509 flow [2024-06-21 16:50:08,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6269, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6509, PETRI_PLACES=418, PETRI_TRANSITIONS=543} [2024-06-21 16:50:08,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 373 predicate places. [2024-06-21 16:50:08,720 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 543 transitions, 6509 flow [2024-06-21 16:50:08,721 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:08,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:08,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:08,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-21 16:50:08,721 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:08,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:08,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1495416387, now seen corresponding path program 8 times [2024-06-21 16:50:08,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:08,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890029638] [2024-06-21 16:50:08,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:08,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:08,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:09,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:09,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:09,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890029638] [2024-06-21 16:50:09,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890029638] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:09,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:09,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:09,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775044726] [2024-06-21 16:50:09,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:09,560 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:09,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:09,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:09,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:09,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:09,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 543 transitions, 6509 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:09,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:09,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:09,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:11,272 INFO L124 PetriNetUnfolderBase]: 4277/6997 cut-off events. [2024-06-21 16:50:11,273 INFO L125 PetriNetUnfolderBase]: For 2585438/2585440 co-relation queries the response was YES. [2024-06-21 16:50:11,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79373 conditions, 6997 events. 4277/6997 cut-off events. For 2585438/2585440 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45784 event pairs, 937 based on Foata normal form. 4/6952 useless extension candidates. Maximal degree in co-relation 79172. Up to 5993 conditions per place. [2024-06-21 16:50:11,392 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 369 selfloop transitions, 150 changer transitions 0/562 dead transitions. [2024-06-21 16:50:11,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 562 transitions, 8384 flow [2024-06-21 16:50:11,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:11,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:11,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-21 16:50:11,393 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-06-21 16:50:11,393 INFO L175 Difference]: Start difference. First operand has 418 places, 543 transitions, 6509 flow. Second operand 9 states and 175 transitions. [2024-06-21 16:50:11,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 562 transitions, 8384 flow [2024-06-21 16:50:17,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 562 transitions, 8190 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:17,350 INFO L231 Difference]: Finished difference. Result has 421 places, 547 transitions, 6761 flow [2024-06-21 16:50:17,350 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6315, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=543, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6761, PETRI_PLACES=421, PETRI_TRANSITIONS=547} [2024-06-21 16:50:17,350 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 376 predicate places. [2024-06-21 16:50:17,350 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 547 transitions, 6761 flow [2024-06-21 16:50:17,350 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:17,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:17,351 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:17,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-21 16:50:17,351 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:17,351 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:17,351 INFO L85 PathProgramCache]: Analyzing trace with hash 1038734307, now seen corresponding path program 9 times [2024-06-21 16:50:17,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:17,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006048312] [2024-06-21 16:50:17,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:17,352 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:17,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:18,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:18,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006048312] [2024-06-21 16:50:18,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006048312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:18,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:18,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:18,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658986485] [2024-06-21 16:50:18,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:18,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:18,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:18,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:18,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:18,281 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:18,281 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 547 transitions, 6761 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:18,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:18,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:18,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:19,986 INFO L124 PetriNetUnfolderBase]: 4273/6993 cut-off events. [2024-06-21 16:50:19,986 INFO L125 PetriNetUnfolderBase]: For 2595374/2595376 co-relation queries the response was YES. [2024-06-21 16:50:20,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79584 conditions, 6993 events. 4273/6993 cut-off events. For 2595374/2595376 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 45732 event pairs, 942 based on Foata normal form. 4/6948 useless extension candidates. Maximal degree in co-relation 79382. Up to 5991 conditions per place. [2024-06-21 16:50:20,109 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 380 selfloop transitions, 140 changer transitions 0/563 dead transitions. [2024-06-21 16:50:20,109 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 563 transitions, 8807 flow [2024-06-21 16:50:20,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:20,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:20,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:50:20,110 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 16:50:20,110 INFO L175 Difference]: Start difference. First operand has 421 places, 547 transitions, 6761 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:50:20,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 563 transitions, 8807 flow [2024-06-21 16:50:26,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 563 transitions, 8339 flow, removed 104 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:26,588 INFO L231 Difference]: Finished difference. Result has 424 places, 547 transitions, 6581 flow [2024-06-21 16:50:26,589 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6293, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=407, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6581, PETRI_PLACES=424, PETRI_TRANSITIONS=547} [2024-06-21 16:50:26,589 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 379 predicate places. [2024-06-21 16:50:26,589 INFO L495 AbstractCegarLoop]: Abstraction has has 424 places, 547 transitions, 6581 flow [2024-06-21 16:50:26,589 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:26,589 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:26,589 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:26,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-21 16:50:26,590 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:26,590 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:26,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1038734803, now seen corresponding path program 5 times [2024-06-21 16:50:26,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:26,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702409672] [2024-06-21 16:50:26,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:26,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:26,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:27,581 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:27,581 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:27,581 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702409672] [2024-06-21 16:50:27,581 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702409672] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:27,581 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:27,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:27,582 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794059418] [2024-06-21 16:50:27,582 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:27,582 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:27,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:27,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:27,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:27,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:27,670 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 424 places, 547 transitions, 6581 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:27,670 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:27,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:27,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:29,438 INFO L124 PetriNetUnfolderBase]: 4270/6988 cut-off events. [2024-06-21 16:50:29,438 INFO L125 PetriNetUnfolderBase]: For 2610732/2610736 co-relation queries the response was YES. [2024-06-21 16:50:29,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79358 conditions, 6988 events. 4270/6988 cut-off events. For 2610732/2610736 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45671 event pairs, 917 based on Foata normal form. 5/6945 useless extension candidates. Maximal degree in co-relation 79155. Up to 6383 conditions per place. [2024-06-21 16:50:29,577 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 464 selfloop transitions, 52 changer transitions 0/559 dead transitions. [2024-06-21 16:50:29,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 432 places, 559 transitions, 7641 flow [2024-06-21 16:50:29,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:29,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:29,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:50:29,578 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:50:29,578 INFO L175 Difference]: Start difference. First operand has 424 places, 547 transitions, 6581 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:50:29,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 432 places, 559 transitions, 7641 flow [2024-06-21 16:50:37,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 559 transitions, 7240 flow, removed 52 selfloop flow, removed 8 redundant places. [2024-06-21 16:50:37,682 INFO L231 Difference]: Finished difference. Result has 425 places, 547 transitions, 6290 flow [2024-06-21 16:50:37,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6290, PETRI_PLACES=425, PETRI_TRANSITIONS=547} [2024-06-21 16:50:37,683 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-21 16:50:37,683 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 547 transitions, 6290 flow [2024-06-21 16:50:37,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:37,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:37,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:37,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-21 16:50:37,683 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:37,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:37,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1038316737, now seen corresponding path program 10 times [2024-06-21 16:50:37,684 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:37,684 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811958328] [2024-06-21 16:50:37,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:37,684 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:38,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:38,633 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:38,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811958328] [2024-06-21 16:50:38,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811958328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:38,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:38,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:38,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056406124] [2024-06-21 16:50:38,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:38,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:38,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:38,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:38,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:38,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:38,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 547 transitions, 6290 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:38,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:38,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:38,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:40,498 INFO L124 PetriNetUnfolderBase]: 4272/6992 cut-off events. [2024-06-21 16:50:40,498 INFO L125 PetriNetUnfolderBase]: For 2641857/2641859 co-relation queries the response was YES. [2024-06-21 16:50:40,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78966 conditions, 6992 events. 4272/6992 cut-off events. For 2641857/2641859 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 45725 event pairs, 942 based on Foata normal form. 4/6947 useless extension candidates. Maximal degree in co-relation 78763. Up to 5991 conditions per place. [2024-06-21 16:50:40,626 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 362 selfloop transitions, 160 changer transitions 0/565 dead transitions. [2024-06-21 16:50:40,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 565 transitions, 8115 flow [2024-06-21 16:50:40,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:40,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:40,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-21 16:50:40,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-21 16:50:40,627 INFO L175 Difference]: Start difference. First operand has 425 places, 547 transitions, 6290 flow. Second operand 9 states and 176 transitions. [2024-06-21 16:50:40,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 565 transitions, 8115 flow [2024-06-21 16:50:46,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 565 transitions, 7945 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-21 16:50:46,566 INFO L231 Difference]: Finished difference. Result has 425 places, 551 transitions, 6594 flow [2024-06-21 16:50:46,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6120, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6594, PETRI_PLACES=425, PETRI_TRANSITIONS=551} [2024-06-21 16:50:46,567 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 380 predicate places. [2024-06-21 16:50:46,567 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 551 transitions, 6594 flow [2024-06-21 16:50:46,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:46,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:46,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:46,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-21 16:50:46,568 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:46,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:46,568 INFO L85 PathProgramCache]: Analyzing trace with hash -1395409031, now seen corresponding path program 1 times [2024-06-21 16:50:46,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:46,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946582581] [2024-06-21 16:50:46,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:46,569 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:46,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:47,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:47,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946582581] [2024-06-21 16:50:47,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946582581] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:47,558 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:47,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:47,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28664498] [2024-06-21 16:50:47,558 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:47,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:47,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:47,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:47,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:47,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 44 [2024-06-21 16:50:47,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 551 transitions, 6594 flow. Second operand has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:47,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:47,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 44 [2024-06-21 16:50:47,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:49,605 INFO L124 PetriNetUnfolderBase]: 4233/6989 cut-off events. [2024-06-21 16:50:49,605 INFO L125 PetriNetUnfolderBase]: For 2667382/2667382 co-relation queries the response was YES. [2024-06-21 16:50:49,713 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79343 conditions, 6989 events. 4233/6989 cut-off events. For 2667382/2667382 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 46019 event pairs, 880 based on Foata normal form. 1/6990 useless extension candidates. Maximal degree in co-relation 79139. Up to 6252 conditions per place. [2024-06-21 16:50:49,747 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 500 selfloop transitions, 20 changer transitions 0/578 dead transitions. [2024-06-21 16:50:49,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 578 transitions, 7804 flow [2024-06-21 16:50:49,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:49,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:49,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2024-06-21 16:50:49,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44696969696969696 [2024-06-21 16:50:49,748 INFO L175 Difference]: Start difference. First operand has 425 places, 551 transitions, 6594 flow. Second operand 9 states and 177 transitions. [2024-06-21 16:50:49,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 578 transitions, 7804 flow [2024-06-21 16:50:56,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 578 transitions, 7442 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-21 16:50:56,719 INFO L231 Difference]: Finished difference. Result has 428 places, 554 transitions, 6394 flow [2024-06-21 16:50:56,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6232, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6394, PETRI_PLACES=428, PETRI_TRANSITIONS=554} [2024-06-21 16:50:56,720 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 383 predicate places. [2024-06-21 16:50:56,720 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 554 transitions, 6394 flow [2024-06-21 16:50:56,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 13.6) internal successors, (136), 10 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:56,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:50:56,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:50:56,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-21 16:50:56,721 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:50:56,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:50:56,721 INFO L85 PathProgramCache]: Analyzing trace with hash 1707418965, now seen corresponding path program 1 times [2024-06-21 16:50:56,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:50:56,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289241414] [2024-06-21 16:50:56,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:50:56,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:50:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:50:57,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:50:57,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:50:57,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289241414] [2024-06-21 16:50:57,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1289241414] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:50:57,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:50:57,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:50:57,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244288160] [2024-06-21 16:50:57,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:50:57,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:50:57,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:50:57,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:50:57,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:50:57,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:50:57,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 554 transitions, 6394 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:50:57,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:50:57,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:50:57,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:50:59,526 INFO L124 PetriNetUnfolderBase]: 4341/7101 cut-off events. [2024-06-21 16:50:59,526 INFO L125 PetriNetUnfolderBase]: For 2705709/2705709 co-relation queries the response was YES. [2024-06-21 16:50:59,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80172 conditions, 7101 events. 4341/7101 cut-off events. For 2705709/2705709 co-relation queries the response was YES. Maximal size of possible extension queue 406. Compared 46253 event pairs, 911 based on Foata normal form. 2/7103 useless extension candidates. Maximal degree in co-relation 79967. Up to 6532 conditions per place. [2024-06-21 16:50:59,666 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 534 selfloop transitions, 20 changer transitions 0/580 dead transitions. [2024-06-21 16:50:59,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 580 transitions, 7652 flow [2024-06-21 16:50:59,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:50:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:50:59,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:50:59,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:50:59,668 INFO L175 Difference]: Start difference. First operand has 428 places, 554 transitions, 6394 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:50:59,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 580 transitions, 7652 flow [2024-06-21 16:51:06,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 580 transitions, 7510 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:06,460 INFO L231 Difference]: Finished difference. Result has 430 places, 557 transitions, 6390 flow [2024-06-21 16:51:06,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6252, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6390, PETRI_PLACES=430, PETRI_TRANSITIONS=557} [2024-06-21 16:51:06,460 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 385 predicate places. [2024-06-21 16:51:06,460 INFO L495 AbstractCegarLoop]: Abstraction has has 430 places, 557 transitions, 6390 flow [2024-06-21 16:51:06,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:06,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:06,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:06,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-21 16:51:06,461 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:06,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:06,462 INFO L85 PathProgramCache]: Analyzing trace with hash 98925153, now seen corresponding path program 2 times [2024-06-21 16:51:06,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:06,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484720890] [2024-06-21 16:51:06,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:06,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:06,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:07,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:07,273 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:07,273 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484720890] [2024-06-21 16:51:07,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484720890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:07,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:07,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:07,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356342873] [2024-06-21 16:51:07,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:07,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:07,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:07,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:07,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:07,382 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:07,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 430 places, 557 transitions, 6390 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:07,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:07,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:07,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:09,647 INFO L124 PetriNetUnfolderBase]: 4367/7139 cut-off events. [2024-06-21 16:51:09,647 INFO L125 PetriNetUnfolderBase]: For 2768312/2768312 co-relation queries the response was YES. [2024-06-21 16:51:09,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81581 conditions, 7139 events. 4367/7139 cut-off events. For 2768312/2768312 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46478 event pairs, 911 based on Foata normal form. 2/7141 useless extension candidates. Maximal degree in co-relation 81375. Up to 6539 conditions per place. [2024-06-21 16:51:09,778 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 526 selfloop transitions, 33 changer transitions 0/585 dead transitions. [2024-06-21 16:51:09,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 585 transitions, 8064 flow [2024-06-21 16:51:09,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:09,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:09,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:51:09,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-21 16:51:09,780 INFO L175 Difference]: Start difference. First operand has 430 places, 557 transitions, 6390 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:51:09,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 585 transitions, 8064 flow [2024-06-21 16:51:15,886 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 585 transitions, 7948 flow, removed 40 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:15,892 INFO L231 Difference]: Finished difference. Result has 432 places, 563 transitions, 6536 flow [2024-06-21 16:51:15,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6274, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6536, PETRI_PLACES=432, PETRI_TRANSITIONS=563} [2024-06-21 16:51:15,893 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 387 predicate places. [2024-06-21 16:51:15,893 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 563 transitions, 6536 flow [2024-06-21 16:51:15,893 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:15,893 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:15,893 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:15,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-21 16:51:15,894 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:15,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:15,894 INFO L85 PathProgramCache]: Analyzing trace with hash 1712067353, now seen corresponding path program 1 times [2024-06-21 16:51:15,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:15,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426668252] [2024-06-21 16:51:15,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:15,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:15,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:16,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:16,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:16,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426668252] [2024-06-21 16:51:16,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426668252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:16,740 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:16,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:16,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892160928] [2024-06-21 16:51:16,740 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:16,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:16,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:16,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:16,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:16,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:16,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 563 transitions, 6536 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:16,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:16,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:16,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:18,801 INFO L124 PetriNetUnfolderBase]: 4372/7148 cut-off events. [2024-06-21 16:51:18,802 INFO L125 PetriNetUnfolderBase]: For 2807903/2807903 co-relation queries the response was YES. [2024-06-21 16:51:18,908 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82325 conditions, 7148 events. 4372/7148 cut-off events. For 2807903/2807903 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 46575 event pairs, 915 based on Foata normal form. 2/7150 useless extension candidates. Maximal degree in co-relation 82118. Up to 6589 conditions per place. [2024-06-21 16:51:18,946 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 538 selfloop transitions, 20 changer transitions 0/584 dead transitions. [2024-06-21 16:51:18,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 584 transitions, 7792 flow [2024-06-21 16:51:18,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:18,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:18,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-21 16:51:18,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4116161616161616 [2024-06-21 16:51:18,947 INFO L175 Difference]: Start difference. First operand has 432 places, 563 transitions, 6536 flow. Second operand 9 states and 163 transitions. [2024-06-21 16:51:18,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 584 transitions, 7792 flow [2024-06-21 16:51:25,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 584 transitions, 7668 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 16:51:25,876 INFO L231 Difference]: Finished difference. Result has 436 places, 566 transitions, 6560 flow [2024-06-21 16:51:25,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6412, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=543, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6560, PETRI_PLACES=436, PETRI_TRANSITIONS=566} [2024-06-21 16:51:25,877 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 391 predicate places. [2024-06-21 16:51:25,877 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 566 transitions, 6560 flow [2024-06-21 16:51:25,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:25,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:25,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:25,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-21 16:51:25,877 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:25,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash 1847967429, now seen corresponding path program 3 times [2024-06-21 16:51:25,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:25,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661987448] [2024-06-21 16:51:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:25,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:25,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:26,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:26,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:26,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661987448] [2024-06-21 16:51:26,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661987448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:26,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:26,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:26,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406244343] [2024-06-21 16:51:26,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:26,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:26,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:26,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:26,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:26,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:26,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 566 transitions, 6560 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:26,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:26,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:26,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:28,665 INFO L124 PetriNetUnfolderBase]: 4366/7140 cut-off events. [2024-06-21 16:51:28,665 INFO L125 PetriNetUnfolderBase]: For 2814030/2814030 co-relation queries the response was YES. [2024-06-21 16:51:28,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82289 conditions, 7140 events. 4366/7140 cut-off events. For 2814030/2814030 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 46479 event pairs, 912 based on Foata normal form. 2/7142 useless extension candidates. Maximal degree in co-relation 82080. Up to 6541 conditions per place. [2024-06-21 16:51:28,795 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 529 selfloop transitions, 32 changer transitions 0/587 dead transitions. [2024-06-21 16:51:28,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 587 transitions, 7744 flow [2024-06-21 16:51:28,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:28,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:28,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:51:28,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-21 16:51:28,797 INFO L175 Difference]: Start difference. First operand has 436 places, 566 transitions, 6560 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:51:28,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 587 transitions, 7744 flow [2024-06-21 16:51:35,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 587 transitions, 7558 flow, removed 75 selfloop flow, removed 7 redundant places. [2024-06-21 16:51:35,306 INFO L231 Difference]: Finished difference. Result has 438 places, 566 transitions, 6444 flow [2024-06-21 16:51:35,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6374, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6444, PETRI_PLACES=438, PETRI_TRANSITIONS=566} [2024-06-21 16:51:35,307 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 393 predicate places. [2024-06-21 16:51:35,307 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 566 transitions, 6444 flow [2024-06-21 16:51:35,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:35,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:35,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:35,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-21 16:51:35,307 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:35,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:35,308 INFO L85 PathProgramCache]: Analyzing trace with hash 1884796253, now seen corresponding path program 2 times [2024-06-21 16:51:35,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:35,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418473718] [2024-06-21 16:51:35,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:35,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:35,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:36,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:36,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:36,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418473718] [2024-06-21 16:51:36,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418473718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:36,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:36,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:36,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341102274] [2024-06-21 16:51:36,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:36,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:36,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:36,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:36,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:36,216 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:36,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 566 transitions, 6444 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:36,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:36,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:36,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:38,147 INFO L124 PetriNetUnfolderBase]: 4387/7171 cut-off events. [2024-06-21 16:51:38,147 INFO L125 PetriNetUnfolderBase]: For 2875088/2875088 co-relation queries the response was YES. [2024-06-21 16:51:38,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83128 conditions, 7171 events. 4387/7171 cut-off events. For 2875088/2875088 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 46707 event pairs, 914 based on Foata normal form. 2/7173 useless extension candidates. Maximal degree in co-relation 82918. Up to 6577 conditions per place. [2024-06-21 16:51:38,284 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 519 selfloop transitions, 43 changer transitions 0/588 dead transitions. [2024-06-21 16:51:38,284 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 588 transitions, 8124 flow [2024-06-21 16:51:38,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:38,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:38,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:51:38,285 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:51:38,285 INFO L175 Difference]: Start difference. First operand has 438 places, 566 transitions, 6444 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:51:38,285 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 588 transitions, 8124 flow [2024-06-21 16:51:45,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 588 transitions, 8038 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-21 16:51:45,743 INFO L231 Difference]: Finished difference. Result has 439 places, 572 transitions, 6661 flow [2024-06-21 16:51:45,743 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6358, PETRI_DIFFERENCE_MINUEND_PLACES=430, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6661, PETRI_PLACES=439, PETRI_TRANSITIONS=572} [2024-06-21 16:51:45,744 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 394 predicate places. [2024-06-21 16:51:45,744 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 572 transitions, 6661 flow [2024-06-21 16:51:45,744 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:45,744 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:45,744 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:45,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-21 16:51:45,744 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:45,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:45,745 INFO L85 PathProgramCache]: Analyzing trace with hash 1884787635, now seen corresponding path program 4 times [2024-06-21 16:51:45,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:45,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794478980] [2024-06-21 16:51:45,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:45,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:45,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:46,670 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:46,670 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:46,670 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794478980] [2024-06-21 16:51:46,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794478980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:46,670 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:46,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:46,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163133403] [2024-06-21 16:51:46,670 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:46,671 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:46,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:46,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:46,671 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:46,762 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:46,762 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 572 transitions, 6661 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:46,762 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:46,762 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:46,762 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:48,597 INFO L124 PetriNetUnfolderBase]: 4418/7214 cut-off events. [2024-06-21 16:51:48,597 INFO L125 PetriNetUnfolderBase]: For 2942785/2942785 co-relation queries the response was YES. [2024-06-21 16:51:48,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84549 conditions, 7214 events. 4418/7214 cut-off events. For 2942785/2942785 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 46948 event pairs, 910 based on Foata normal form. 2/7216 useless extension candidates. Maximal degree in co-relation 84338. Up to 6568 conditions per place. [2024-06-21 16:51:48,737 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 519 selfloop transitions, 52 changer transitions 0/597 dead transitions. [2024-06-21 16:51:48,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 597 transitions, 8379 flow [2024-06-21 16:51:48,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:48,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:48,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:51:48,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-21 16:51:48,738 INFO L175 Difference]: Start difference. First operand has 439 places, 572 transitions, 6661 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:51:48,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 597 transitions, 8379 flow [2024-06-21 16:51:54,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 597 transitions, 8229 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-21 16:51:54,896 INFO L231 Difference]: Finished difference. Result has 443 places, 578 transitions, 6831 flow [2024-06-21 16:51:54,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6511, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=523, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6831, PETRI_PLACES=443, PETRI_TRANSITIONS=578} [2024-06-21 16:51:54,897 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 398 predicate places. [2024-06-21 16:51:54,897 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 578 transitions, 6831 flow [2024-06-21 16:51:54,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:54,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:51:54,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:51:54,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-21 16:51:54,897 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:51:54,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:51:54,898 INFO L85 PathProgramCache]: Analyzing trace with hash 1884550485, now seen corresponding path program 5 times [2024-06-21 16:51:54,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:51:54,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647664721] [2024-06-21 16:51:54,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:51:54,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:51:54,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:51:55,743 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:51:55,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:51:55,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647664721] [2024-06-21 16:51:55,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647664721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:51:55,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:51:55,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:51:55,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455780063] [2024-06-21 16:51:55,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:51:55,744 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:51:55,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:51:55,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:51:55,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:51:55,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:51:55,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 578 transitions, 6831 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:51:55,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:51:55,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:51:55,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:51:57,737 INFO L124 PetriNetUnfolderBase]: 4428/7232 cut-off events. [2024-06-21 16:51:57,737 INFO L125 PetriNetUnfolderBase]: For 2984063/2984063 co-relation queries the response was YES. [2024-06-21 16:51:57,839 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85436 conditions, 7232 events. 4428/7232 cut-off events. For 2984063/2984063 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 47129 event pairs, 915 based on Foata normal form. 2/7234 useless extension candidates. Maximal degree in co-relation 85223. Up to 6578 conditions per place. [2024-06-21 16:51:57,873 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 521 selfloop transitions, 53 changer transitions 0/600 dead transitions. [2024-06-21 16:51:57,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 600 transitions, 8461 flow [2024-06-21 16:51:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:51:57,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:51:57,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:51:57,875 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:51:57,875 INFO L175 Difference]: Start difference. First operand has 443 places, 578 transitions, 6831 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:51:57,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 600 transitions, 8461 flow [2024-06-21 16:52:04,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 600 transitions, 8315 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-21 16:52:04,455 INFO L231 Difference]: Finished difference. Result has 447 places, 581 transitions, 6905 flow [2024-06-21 16:52:04,455 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6689, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=578, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6905, PETRI_PLACES=447, PETRI_TRANSITIONS=581} [2024-06-21 16:52:04,455 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 402 predicate places. [2024-06-21 16:52:04,455 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 581 transitions, 6905 flow [2024-06-21 16:52:04,456 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:04,456 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:04,456 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:04,456 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-21 16:52:04,456 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:52:04,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:04,456 INFO L85 PathProgramCache]: Analyzing trace with hash 271415043, now seen corresponding path program 6 times [2024-06-21 16:52:04,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:04,457 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306657166] [2024-06-21 16:52:04,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:04,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:04,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:05,281 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:05,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:05,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306657166] [2024-06-21 16:52:05,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306657166] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:05,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:05,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:05,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [239314128] [2024-06-21 16:52:05,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:05,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:05,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:05,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:05,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:05,357 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:52:05,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 581 transitions, 6905 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:05,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:05,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:52:05,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:07,755 INFO L124 PetriNetUnfolderBase]: 4422/7222 cut-off events. [2024-06-21 16:52:07,755 INFO L125 PetriNetUnfolderBase]: For 2987467/2987467 co-relation queries the response was YES. [2024-06-21 16:52:07,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84705 conditions, 7222 events. 4422/7222 cut-off events. For 2987467/2987467 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 46994 event pairs, 914 based on Foata normal form. 2/7224 useless extension candidates. Maximal degree in co-relation 84490. Up to 6573 conditions per place. [2024-06-21 16:52:07,884 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 522 selfloop transitions, 52 changer transitions 0/600 dead transitions. [2024-06-21 16:52:07,884 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 600 transitions, 8113 flow [2024-06-21 16:52:07,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:07,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:07,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:52:07,885 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-21 16:52:07,885 INFO L175 Difference]: Start difference. First operand has 447 places, 581 transitions, 6905 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:52:07,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 600 transitions, 8113 flow [2024-06-21 16:52:14,518 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 600 transitions, 7815 flow, removed 92 selfloop flow, removed 7 redundant places. [2024-06-21 16:52:14,524 INFO L231 Difference]: Finished difference. Result has 449 places, 581 transitions, 6717 flow [2024-06-21 16:52:14,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6607, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6717, PETRI_PLACES=449, PETRI_TRANSITIONS=581} [2024-06-21 16:52:14,525 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-21 16:52:14,525 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 581 transitions, 6717 flow [2024-06-21 16:52:14,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:14,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:14,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:14,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-21 16:52:14,525 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:52:14,526 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:14,526 INFO L85 PathProgramCache]: Analyzing trace with hash 1884557243, now seen corresponding path program 3 times [2024-06-21 16:52:14,526 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:14,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079988508] [2024-06-21 16:52:14,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:14,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:14,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:15,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079988508] [2024-06-21 16:52:15,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079988508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:15,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:15,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:15,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930507593] [2024-06-21 16:52:15,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:15,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:15,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:15,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:15,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:15,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:52:15,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 581 transitions, 6717 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:15,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:15,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:52:15,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:18,016 INFO L124 PetriNetUnfolderBase]: 4427/7231 cut-off events. [2024-06-21 16:52:18,016 INFO L125 PetriNetUnfolderBase]: For 3020306/3020306 co-relation queries the response was YES. [2024-06-21 16:52:18,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84642 conditions, 7231 events. 4427/7231 cut-off events. For 3020306/3020306 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47136 event pairs, 916 based on Foata normal form. 2/7233 useless extension candidates. Maximal degree in co-relation 84427. Up to 6629 conditions per place. [2024-06-21 16:52:18,143 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 531 selfloop transitions, 43 changer transitions 0/600 dead transitions. [2024-06-21 16:52:18,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 600 transitions, 8315 flow [2024-06-21 16:52:18,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:18,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:18,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-21 16:52:18,145 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217171717171717 [2024-06-21 16:52:18,145 INFO L175 Difference]: Start difference. First operand has 449 places, 581 transitions, 6717 flow. Second operand 9 states and 167 transitions. [2024-06-21 16:52:18,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 600 transitions, 8315 flow [2024-06-21 16:52:25,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 448 places, 600 transitions, 8175 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:52:25,154 INFO L231 Difference]: Finished difference. Result has 449 places, 584 transitions, 6759 flow [2024-06-21 16:52:25,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6577, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6759, PETRI_PLACES=449, PETRI_TRANSITIONS=584} [2024-06-21 16:52:25,154 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 404 predicate places. [2024-06-21 16:52:25,154 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 584 transitions, 6759 flow [2024-06-21 16:52:25,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:25,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:25,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:25,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-21 16:52:25,155 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:52:25,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:25,155 INFO L85 PathProgramCache]: Analyzing trace with hash 271645931, now seen corresponding path program 4 times [2024-06-21 16:52:25,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:25,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2113982535] [2024-06-21 16:52:25,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:25,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:25,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:26,117 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:26,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:26,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2113982535] [2024-06-21 16:52:26,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2113982535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:26,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:26,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:26,117 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938034806] [2024-06-21 16:52:26,117 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:26,118 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:26,118 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:26,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:26,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:26,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:52:26,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 584 transitions, 6759 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:26,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:26,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:52:26,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:28,472 INFO L124 PetriNetUnfolderBase]: 4416/7218 cut-off events. [2024-06-21 16:52:28,472 INFO L125 PetriNetUnfolderBase]: For 3030376/3030376 co-relation queries the response was YES. [2024-06-21 16:52:28,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84363 conditions, 7218 events. 4416/7218 cut-off events. For 3030376/3030376 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47089 event pairs, 915 based on Foata normal form. 2/7220 useless extension candidates. Maximal degree in co-relation 84147. Up to 6620 conditions per place. [2024-06-21 16:52:28,594 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 529 selfloop transitions, 44 changer transitions 0/599 dead transitions. [2024-06-21 16:52:28,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 599 transitions, 7941 flow [2024-06-21 16:52:28,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:28,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:28,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-21 16:52:28,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-21 16:52:28,595 INFO L175 Difference]: Start difference. First operand has 449 places, 584 transitions, 6759 flow. Second operand 9 states and 165 transitions. [2024-06-21 16:52:28,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 599 transitions, 7941 flow [2024-06-21 16:52:35,096 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 599 transitions, 7718 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 16:52:35,102 INFO L231 Difference]: Finished difference. Result has 452 places, 584 transitions, 6630 flow [2024-06-21 16:52:35,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6536, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6630, PETRI_PLACES=452, PETRI_TRANSITIONS=584} [2024-06-21 16:52:35,102 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-21 16:52:35,103 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 584 transitions, 6630 flow [2024-06-21 16:52:35,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:35,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:35,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:35,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-21 16:52:35,103 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:52:35,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:35,103 INFO L85 PathProgramCache]: Analyzing trace with hash 1511269725, now seen corresponding path program 5 times [2024-06-21 16:52:35,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:35,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11503392] [2024-06-21 16:52:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:35,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:35,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:36,073 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:36,073 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:36,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11503392] [2024-06-21 16:52:36,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11503392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:36,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:36,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:36,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188320405] [2024-06-21 16:52:36,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:36,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:36,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:36,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:36,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:36,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:52:36,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 584 transitions, 6630 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:36,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:36,201 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:52:36,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:38,409 INFO L124 PetriNetUnfolderBase]: 4426/7234 cut-off events. [2024-06-21 16:52:38,410 INFO L125 PetriNetUnfolderBase]: For 3066038/3066040 co-relation queries the response was YES. [2024-06-21 16:52:38,654 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84601 conditions, 7234 events. 4426/7234 cut-off events. For 3066038/3066040 co-relation queries the response was YES. Maximal size of possible extension queue 410. Compared 47151 event pairs, 924 based on Foata normal form. 4/7238 useless extension candidates. Maximal degree in co-relation 84384. Up to 6566 conditions per place. [2024-06-21 16:52:38,685 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 490 selfloop transitions, 87 changer transitions 0/603 dead transitions. [2024-06-21 16:52:38,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 603 transitions, 8356 flow [2024-06-21 16:52:38,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:38,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:38,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-21 16:52:38,687 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41919191919191917 [2024-06-21 16:52:38,687 INFO L175 Difference]: Start difference. First operand has 452 places, 584 transitions, 6630 flow. Second operand 9 states and 166 transitions. [2024-06-21 16:52:38,687 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 603 transitions, 8356 flow [2024-06-21 16:52:46,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 451 places, 603 transitions, 8239 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:52:46,057 INFO L231 Difference]: Finished difference. Result has 452 places, 590 transitions, 6916 flow [2024-06-21 16:52:46,058 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6513, PETRI_DIFFERENCE_MINUEND_PLACES=443, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6916, PETRI_PLACES=452, PETRI_TRANSITIONS=590} [2024-06-21 16:52:46,060 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 407 predicate places. [2024-06-21 16:52:46,060 INFO L495 AbstractCegarLoop]: Abstraction has has 452 places, 590 transitions, 6916 flow [2024-06-21 16:52:46,060 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:46,060 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:46,061 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:46,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-21 16:52:46,061 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:52:46,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:46,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1501142025, now seen corresponding path program 6 times [2024-06-21 16:52:46,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:46,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086739721] [2024-06-21 16:52:46,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:46,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:46,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:46,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:46,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:46,970 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086739721] [2024-06-21 16:52:46,970 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086739721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:46,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:46,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:46,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905036060] [2024-06-21 16:52:46,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:46,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:46,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:46,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:46,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:47,087 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:52:47,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 452 places, 590 transitions, 6916 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:47,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:47,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:52:47,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:52:49,203 INFO L124 PetriNetUnfolderBase]: 4452/7270 cut-off events. [2024-06-21 16:52:49,203 INFO L125 PetriNetUnfolderBase]: For 3136533/3136535 co-relation queries the response was YES. [2024-06-21 16:52:49,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86091 conditions, 7270 events. 4452/7270 cut-off events. For 3136533/3136535 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 47364 event pairs, 923 based on Foata normal form. 4/7274 useless extension candidates. Maximal degree in co-relation 85873. Up to 6591 conditions per place. [2024-06-21 16:52:49,330 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 496 selfloop transitions, 88 changer transitions 0/610 dead transitions. [2024-06-21 16:52:49,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 610 transitions, 9000 flow [2024-06-21 16:52:49,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:52:49,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:52:49,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:52:49,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:52:49,332 INFO L175 Difference]: Start difference. First operand has 452 places, 590 transitions, 6916 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:52:49,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 610 transitions, 9000 flow [2024-06-21 16:52:56,677 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 610 transitions, 8777 flow, removed 78 selfloop flow, removed 5 redundant places. [2024-06-21 16:52:56,707 INFO L231 Difference]: Finished difference. Result has 456 places, 596 transitions, 7103 flow [2024-06-21 16:52:56,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6725, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7103, PETRI_PLACES=456, PETRI_TRANSITIONS=596} [2024-06-21 16:52:56,708 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 411 predicate places. [2024-06-21 16:52:56,708 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 596 transitions, 7103 flow [2024-06-21 16:52:56,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:56,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:52:56,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:52:56,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-21 16:52:56,709 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:52:56,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:52:56,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1501141777, now seen corresponding path program 7 times [2024-06-21 16:52:56,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:52:56,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124533609] [2024-06-21 16:52:56,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:52:56,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:52:56,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:52:57,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:52:57,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:52:57,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124533609] [2024-06-21 16:52:57,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124533609] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:52:57,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:52:57,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:52:57,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815289192] [2024-06-21 16:52:57,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:52:57,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:52:57,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:52:57,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:52:57,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:52:57,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:52:57,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 596 transitions, 7103 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:52:57,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:52:57,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:52:57,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:00,075 INFO L124 PetriNetUnfolderBase]: 4465/7294 cut-off events. [2024-06-21 16:53:00,075 INFO L125 PetriNetUnfolderBase]: For 3183288/3183290 co-relation queries the response was YES. [2024-06-21 16:53:00,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86404 conditions, 7294 events. 4465/7294 cut-off events. For 3183288/3183290 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 47584 event pairs, 923 based on Foata normal form. 2/7296 useless extension candidates. Maximal degree in co-relation 86184. Up to 6577 conditions per place. [2024-06-21 16:53:00,210 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 510 selfloop transitions, 82 changer transitions 0/618 dead transitions. [2024-06-21 16:53:00,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 618 transitions, 8869 flow [2024-06-21 16:53:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-21 16:53:00,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292929292929293 [2024-06-21 16:53:00,211 INFO L175 Difference]: Start difference. First operand has 456 places, 596 transitions, 7103 flow. Second operand 9 states and 170 transitions. [2024-06-21 16:53:00,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 618 transitions, 8869 flow [2024-06-21 16:53:07,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 459 places, 618 transitions, 8659 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:07,604 INFO L231 Difference]: Finished difference. Result has 460 places, 602 transitions, 7273 flow [2024-06-21 16:53:07,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6893, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=596, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7273, PETRI_PLACES=460, PETRI_TRANSITIONS=602} [2024-06-21 16:53:07,605 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 415 predicate places. [2024-06-21 16:53:07,605 INFO L495 AbstractCegarLoop]: Abstraction has has 460 places, 602 transitions, 7273 flow [2024-06-21 16:53:07,605 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:07,605 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:07,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:07,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-21 16:53:07,606 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:53:07,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:07,606 INFO L85 PathProgramCache]: Analyzing trace with hash 1501150395, now seen corresponding path program 7 times [2024-06-21 16:53:07,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:07,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917636812] [2024-06-21 16:53:07,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:07,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:08,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:08,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:08,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917636812] [2024-06-21 16:53:08,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917636812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:08,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:08,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:08,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187995084] [2024-06-21 16:53:08,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:08,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:08,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:08,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:08,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:08,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:53:08,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 460 places, 602 transitions, 7273 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:08,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:08,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:53:08,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:10,846 INFO L124 PetriNetUnfolderBase]: 4464/7291 cut-off events. [2024-06-21 16:53:10,846 INFO L125 PetriNetUnfolderBase]: For 3198099/3198101 co-relation queries the response was YES. [2024-06-21 16:53:10,952 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86719 conditions, 7291 events. 4464/7291 cut-off events. For 3198099/3198101 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 47565 event pairs, 924 based on Foata normal form. 4/7295 useless extension candidates. Maximal degree in co-relation 86498. Up to 6611 conditions per place. [2024-06-21 16:53:10,988 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 503 selfloop transitions, 86 changer transitions 0/615 dead transitions. [2024-06-21 16:53:10,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 615 transitions, 8813 flow [2024-06-21 16:53:10,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:10,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:10,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:53:10,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:53:10,989 INFO L175 Difference]: Start difference. First operand has 460 places, 602 transitions, 7273 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:53:10,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 615 transitions, 8813 flow [2024-06-21 16:53:18,484 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 615 transitions, 8587 flow, removed 89 selfloop flow, removed 5 redundant places. [2024-06-21 16:53:18,491 INFO L231 Difference]: Finished difference. Result has 464 places, 602 transitions, 7226 flow [2024-06-21 16:53:18,491 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7047, PETRI_DIFFERENCE_MINUEND_PLACES=455, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7226, PETRI_PLACES=464, PETRI_TRANSITIONS=602} [2024-06-21 16:53:18,491 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 419 predicate places. [2024-06-21 16:53:18,491 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 602 transitions, 7226 flow [2024-06-21 16:53:18,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:18,492 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:18,492 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:18,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-21 16:53:18,492 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:53:18,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:18,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1216050525, now seen corresponding path program 8 times [2024-06-21 16:53:18,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:18,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206026636] [2024-06-21 16:53:18,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:18,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:18,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:19,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:19,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:19,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206026636] [2024-06-21 16:53:19,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206026636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:19,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:19,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:19,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097067622] [2024-06-21 16:53:19,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:19,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:19,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:19,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:19,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:19,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:53:19,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 602 transitions, 7226 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:19,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:19,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:53:19,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:21,798 INFO L124 PetriNetUnfolderBase]: 4469/7298 cut-off events. [2024-06-21 16:53:21,798 INFO L125 PetriNetUnfolderBase]: For 3227974/3227976 co-relation queries the response was YES. [2024-06-21 16:53:21,943 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86470 conditions, 7298 events. 4469/7298 cut-off events. For 3227974/3227976 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 47585 event pairs, 927 based on Foata normal form. 4/7302 useless extension candidates. Maximal degree in co-relation 86247. Up to 6617 conditions per place. [2024-06-21 16:53:21,984 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 505 selfloop transitions, 87 changer transitions 0/618 dead transitions. [2024-06-21 16:53:21,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 618 transitions, 8881 flow [2024-06-21 16:53:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:21,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:21,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 16:53:21,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-21 16:53:21,986 INFO L175 Difference]: Start difference. First operand has 464 places, 602 transitions, 7226 flow. Second operand 9 states and 169 transitions. [2024-06-21 16:53:21,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 618 transitions, 8881 flow [2024-06-21 16:53:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 465 places, 618 transitions, 8743 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-21 16:53:29,576 INFO L231 Difference]: Finished difference. Result has 466 places, 605 transitions, 7376 flow [2024-06-21 16:53:29,576 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=7091, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7376, PETRI_PLACES=466, PETRI_TRANSITIONS=605} [2024-06-21 16:53:29,576 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 421 predicate places. [2024-06-21 16:53:29,576 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 605 transitions, 7376 flow [2024-06-21 16:53:29,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:29,577 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:29,577 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:29,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-21 16:53:29,577 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:53:29,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:29,577 INFO L85 PathProgramCache]: Analyzing trace with hash -325311969, now seen corresponding path program 8 times [2024-06-21 16:53:29,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:29,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797852405] [2024-06-21 16:53:29,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:29,578 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:29,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:30,459 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:30,459 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:30,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797852405] [2024-06-21 16:53:30,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797852405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:30,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:30,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:30,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540752707] [2024-06-21 16:53:30,460 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:30,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:30,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:30,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:30,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:30,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:53:30,552 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 605 transitions, 7376 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:30,552 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:30,552 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:53:30,552 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:32,790 INFO L124 PetriNetUnfolderBase]: 4479/7314 cut-off events. [2024-06-21 16:53:32,790 INFO L125 PetriNetUnfolderBase]: For 3267912/3267914 co-relation queries the response was YES. [2024-06-21 16:53:32,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86925 conditions, 7314 events. 4479/7314 cut-off events. For 3267912/3267914 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47679 event pairs, 929 based on Foata normal form. 2/7316 useless extension candidates. Maximal degree in co-relation 86701. Up to 6592 conditions per place. [2024-06-21 16:53:32,924 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 516 selfloop transitions, 82 changer transitions 0/624 dead transitions. [2024-06-21 16:53:32,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 624 transitions, 9062 flow [2024-06-21 16:53:32,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:32,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:32,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-21 16:53:32,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-06-21 16:53:32,926 INFO L175 Difference]: Start difference. First operand has 466 places, 605 transitions, 7376 flow. Second operand 9 states and 171 transitions. [2024-06-21 16:53:32,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 624 transitions, 9062 flow [2024-06-21 16:53:40,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 624 transitions, 8631 flow, removed 47 selfloop flow, removed 10 redundant places. [2024-06-21 16:53:40,304 INFO L231 Difference]: Finished difference. Result has 465 places, 608 transitions, 7221 flow [2024-06-21 16:53:40,304 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6945, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=605, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7221, PETRI_PLACES=465, PETRI_TRANSITIONS=608} [2024-06-21 16:53:40,305 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 420 predicate places. [2024-06-21 16:53:40,305 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 608 transitions, 7221 flow [2024-06-21 16:53:40,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:40,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:40,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:40,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-21 16:53:40,305 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:53:40,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:40,306 INFO L85 PathProgramCache]: Analyzing trace with hash -325305211, now seen corresponding path program 9 times [2024-06-21 16:53:40,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:40,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684801477] [2024-06-21 16:53:40,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:40,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:40,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:41,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:41,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:41,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684801477] [2024-06-21 16:53:41,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684801477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:41,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:41,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:41,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178932970] [2024-06-21 16:53:41,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:41,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:41,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:41,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:41,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:41,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:53:41,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 608 transitions, 7221 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:41,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:41,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:53:41,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:43,668 INFO L124 PetriNetUnfolderBase]: 4484/7323 cut-off events. [2024-06-21 16:53:43,668 INFO L125 PetriNetUnfolderBase]: For 3303557/3303559 co-relation queries the response was YES. [2024-06-21 16:53:43,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87005 conditions, 7323 events. 4484/7323 cut-off events. For 3303557/3303559 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47788 event pairs, 927 based on Foata normal form. 4/7327 useless extension candidates. Maximal degree in co-relation 86781. Up to 6637 conditions per place. [2024-06-21 16:53:43,804 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 504 selfloop transitions, 94 changer transitions 0/624 dead transitions. [2024-06-21 16:53:43,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 473 places, 624 transitions, 8875 flow [2024-06-21 16:53:43,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:43,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:43,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-21 16:53:43,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-21 16:53:43,805 INFO L175 Difference]: Start difference. First operand has 465 places, 608 transitions, 7221 flow. Second operand 9 states and 168 transitions. [2024-06-21 16:53:43,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 473 places, 624 transitions, 8875 flow [2024-06-21 16:53:51,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 624 transitions, 8570 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-21 16:53:51,241 INFO L231 Difference]: Finished difference. Result has 467 places, 611 transitions, 7200 flow [2024-06-21 16:53:51,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6916, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7200, PETRI_PLACES=467, PETRI_TRANSITIONS=611} [2024-06-21 16:53:51,242 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 422 predicate places. [2024-06-21 16:53:51,242 INFO L495 AbstractCegarLoop]: Abstraction has has 467 places, 611 transitions, 7200 flow [2024-06-21 16:53:51,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:51,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:53:51,242 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:53:51,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-21 16:53:51,242 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:53:51,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:53:51,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1216042155, now seen corresponding path program 10 times [2024-06-21 16:53:51,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:53:51,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557880876] [2024-06-21 16:53:51,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:53:51,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:53:51,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:53:52,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:53:52,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:53:52,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557880876] [2024-06-21 16:53:52,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557880876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:53:52,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:53:52,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:53:52,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24096895] [2024-06-21 16:53:52,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:53:52,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:53:52,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:53:52,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:53:52,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:53:52,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:53:52,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 467 places, 611 transitions, 7200 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:53:52,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:53:52,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:53:52,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:53:54,569 INFO L124 PetriNetUnfolderBase]: 4478/7315 cut-off events. [2024-06-21 16:53:54,569 INFO L125 PetriNetUnfolderBase]: For 3310263/3310265 co-relation queries the response was YES. [2024-06-21 16:53:54,675 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86434 conditions, 7315 events. 4478/7315 cut-off events. For 3310263/3310265 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 47720 event pairs, 926 based on Foata normal form. 4/7319 useless extension candidates. Maximal degree in co-relation 86210. Up to 6632 conditions per place. [2024-06-21 16:53:54,707 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 508 selfloop transitions, 89 changer transitions 0/623 dead transitions. [2024-06-21 16:53:54,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 623 transitions, 8422 flow [2024-06-21 16:53:54,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:53:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:53:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-21 16:53:54,708 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42676767676767674 [2024-06-21 16:53:54,708 INFO L175 Difference]: Start difference. First operand has 467 places, 611 transitions, 7200 flow. Second operand 9 states and 169 transitions. [2024-06-21 16:53:54,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 623 transitions, 8422 flow [2024-06-21 16:54:04,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 623 transitions, 8113 flow, removed 78 selfloop flow, removed 6 redundant places. [2024-06-21 16:54:04,374 INFO L231 Difference]: Finished difference. Result has 470 places, 611 transitions, 7075 flow [2024-06-21 16:54:04,374 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6891, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7075, PETRI_PLACES=470, PETRI_TRANSITIONS=611} [2024-06-21 16:54:04,374 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 425 predicate places. [2024-06-21 16:54:04,374 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 611 transitions, 7075 flow [2024-06-21 16:54:04,374 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:04,375 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:04,375 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:04,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-21 16:54:04,375 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-21 16:54:04,375 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:04,375 INFO L85 PathProgramCache]: Analyzing trace with hash -325074819, now seen corresponding path program 9 times [2024-06-21 16:54:04,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:04,375 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881680591] [2024-06-21 16:54:04,376 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:04,376 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:04,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:05,370 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:05,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881680591] [2024-06-21 16:54:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881680591] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:05,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:05,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679413178] [2024-06-21 16:54:05,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:05,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:05,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:05,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:54:05,484 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 611 transitions, 7075 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:05,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:05,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:54:05,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:07,812 INFO L124 PetriNetUnfolderBase]: 4488/7331 cut-off events. [2024-06-21 16:54:07,812 INFO L125 PetriNetUnfolderBase]: For 3348120/3348122 co-relation queries the response was YES. [2024-06-21 16:54:07,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86693 conditions, 7331 events. 4488/7331 cut-off events. For 3348120/3348122 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 47894 event pairs, 928 based on Foata normal form. 2/7333 useless extension candidates. Maximal degree in co-relation 86468. Up to 6602 conditions per place. [2024-06-21 16:54:07,947 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 523 selfloop transitions, 82 changer transitions 0/631 dead transitions. [2024-06-21 16:54:07,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 631 transitions, 8768 flow [2024-06-21 16:54:07,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:07,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:07,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-21 16:54:07,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-21 16:54:07,948 INFO L175 Difference]: Start difference. First operand has 470 places, 611 transitions, 7075 flow. Second operand 9 states and 174 transitions. [2024-06-21 16:54:07,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 631 transitions, 8768 flow [2024-06-21 16:54:18,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 469 places, 631 transitions, 8549 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:54:18,274 INFO L231 Difference]: Finished difference. Result has 470 places, 614 transitions, 7113 flow [2024-06-21 16:54:18,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6856, PETRI_DIFFERENCE_MINUEND_PLACES=461, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7113, PETRI_PLACES=470, PETRI_TRANSITIONS=614} [2024-06-21 16:54:18,274 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 425 predicate places. [2024-06-21 16:54:18,275 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 614 transitions, 7113 flow [2024-06-21 16:54:18,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:18,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:18,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:18,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-21 16:54:18,275 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)] === [2024-06-21 16:54:18,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:18,275 INFO L85 PathProgramCache]: Analyzing trace with hash 1215811267, now seen corresponding path program 10 times [2024-06-21 16:54:18,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:18,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477706420] [2024-06-21 16:54:18,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:18,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:18,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:19,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:19,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477706420] [2024-06-21 16:54:19,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477706420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:19,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:19,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:19,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566516341] [2024-06-21 16:54:19,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:19,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:19,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:19,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:19,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:19,296 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:54:19,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 614 transitions, 7113 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:19,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:19,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:54:19,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:21,495 INFO L124 PetriNetUnfolderBase]: 4482/7323 cut-off events. [2024-06-21 16:54:21,496 INFO L125 PetriNetUnfolderBase]: For 3356706/3356708 co-relation queries the response was YES. [2024-06-21 16:54:21,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86497 conditions, 7323 events. 4482/7323 cut-off events. For 3356706/3356708 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 47850 event pairs, 927 based on Foata normal form. 2/7325 useless extension candidates. Maximal degree in co-relation 86271. Up to 6597 conditions per place. [2024-06-21 16:54:21,830 INFO L140 encePairwiseOnDemand]: 32/44 looper letters, 521 selfloop transitions, 83 changer transitions 0/630 dead transitions. [2024-06-21 16:54:21,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 630 transitions, 8373 flow [2024-06-21 16:54:21,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:21,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:21,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-21 16:54:21,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43434343434343436 [2024-06-21 16:54:21,831 INFO L175 Difference]: Start difference. First operand has 470 places, 614 transitions, 7113 flow. Second operand 9 states and 172 transitions. [2024-06-21 16:54:21,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 630 transitions, 8373 flow [2024-06-21 16:54:29,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 471 places, 630 transitions, 8029 flow, removed 72 selfloop flow, removed 7 redundant places. [2024-06-21 16:54:29,420 INFO L231 Difference]: Finished difference. Result has 472 places, 614 transitions, 6941 flow [2024-06-21 16:54:29,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6769, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=531, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6941, PETRI_PLACES=472, PETRI_TRANSITIONS=614} [2024-06-21 16:54:29,420 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 427 predicate places. [2024-06-21 16:54:29,420 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 614 transitions, 6941 flow [2024-06-21 16:54:29,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:29,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:29,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:29,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-21 16:54:29,421 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)] === [2024-06-21 16:54:29,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:29,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1511639121, now seen corresponding path program 1 times [2024-06-21 16:54:29,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:29,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749649115] [2024-06-21 16:54:29,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:29,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:29,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:30,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:30,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:30,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749649115] [2024-06-21 16:54:30,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749649115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:30,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:30,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-21 16:54:30,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968943790] [2024-06-21 16:54:30,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:30,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-21 16:54:30,719 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:30,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-21 16:54:30,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-21 16:54:30,886 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:54:30,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 614 transitions, 6941 flow. Second operand has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:30,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:30,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:54:30,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:33,270 INFO L124 PetriNetUnfolderBase]: 4429/7226 cut-off events. [2024-06-21 16:54:33,270 INFO L125 PetriNetUnfolderBase]: For 3366153/3366153 co-relation queries the response was YES. [2024-06-21 16:54:33,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85643 conditions, 7226 events. 4429/7226 cut-off events. For 3366153/3366153 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 47213 event pairs, 913 based on Foata normal form. 2/7180 useless extension candidates. Maximal degree in co-relation 85416. Up to 6630 conditions per place. [2024-06-21 16:54:33,409 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 555 selfloop transitions, 22 changer transitions 0/630 dead transitions. [2024-06-21 16:54:33,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 630 transitions, 8265 flow [2024-06-21 16:54:33,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-21 16:54:33,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-21 16:54:33,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-21 16:54:33,410 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39090909090909093 [2024-06-21 16:54:33,410 INFO L175 Difference]: Start difference. First operand has 472 places, 614 transitions, 6941 flow. Second operand 10 states and 172 transitions. [2024-06-21 16:54:33,410 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 630 transitions, 8265 flow [2024-06-21 16:54:42,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 472 places, 630 transitions, 8073 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-21 16:54:42,311 INFO L231 Difference]: Finished difference. Result has 473 places, 616 transitions, 6940 flow [2024-06-21 16:54:42,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6749, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=614, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6940, PETRI_PLACES=473, PETRI_TRANSITIONS=616} [2024-06-21 16:54:42,312 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 428 predicate places. [2024-06-21 16:54:42,312 INFO L495 AbstractCegarLoop]: Abstraction has has 473 places, 616 transitions, 6940 flow [2024-06-21 16:54:42,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.545454545454545) internal successors, (138), 11 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:42,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:42,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:42,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-21 16:54:42,313 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)] === [2024-06-21 16:54:42,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash -1724642163, now seen corresponding path program 1 times [2024-06-21 16:54:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:42,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267245066] [2024-06-21 16:54:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:42,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:43,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:43,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:43,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267245066] [2024-06-21 16:54:43,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267245066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:43,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:43,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:43,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607442020] [2024-06-21 16:54:43,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:43,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:43,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:43,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:43,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:43,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:54:43,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 473 places, 616 transitions, 6940 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:43,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:43,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:54:43,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:45,798 INFO L124 PetriNetUnfolderBase]: 4450/7256 cut-off events. [2024-06-21 16:54:45,798 INFO L125 PetriNetUnfolderBase]: For 3431022/3431024 co-relation queries the response was YES. [2024-06-21 16:54:45,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86284 conditions, 7256 events. 4450/7256 cut-off events. For 3431022/3431024 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 47313 event pairs, 725 based on Foata normal form. 6/7234 useless extension candidates. Maximal degree in co-relation 86056. Up to 6515 conditions per place. [2024-06-21 16:54:45,937 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 567 selfloop transitions, 29 changer transitions 0/649 dead transitions. [2024-06-21 16:54:45,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 481 places, 649 transitions, 8352 flow [2024-06-21 16:54:45,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:45,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:45,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:54:45,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 16:54:45,938 INFO L175 Difference]: Start difference. First operand has 473 places, 616 transitions, 6940 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:54:45,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 481 places, 649 transitions, 8352 flow [2024-06-21 16:54:55,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 649 transitions, 8177 flow, removed 67 selfloop flow, removed 8 redundant places. [2024-06-21 16:54:55,392 INFO L231 Difference]: Finished difference. Result has 474 places, 619 transitions, 6981 flow [2024-06-21 16:54:55,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=44, PETRI_DIFFERENCE_MINUEND_FLOW=6765, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=587, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6981, PETRI_PLACES=474, PETRI_TRANSITIONS=619} [2024-06-21 16:54:55,393 INFO L281 CegarLoopForPetriNet]: 45 programPoint places, 429 predicate places. [2024-06-21 16:54:55,393 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 619 transitions, 6981 flow [2024-06-21 16:54:55,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:55,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-21 16:54:55,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-21 16:54:55,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-21 16:54:55,393 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)] === [2024-06-21 16:54:55,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-21 16:54:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash -1399901043, now seen corresponding path program 2 times [2024-06-21 16:54:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-21 16:54:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905531940] [2024-06-21 16:54:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-21 16:54:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-21 16:54:55,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-21 16:54:56,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-21 16:54:56,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-21 16:54:56,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905531940] [2024-06-21 16:54:56,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905531940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-21 16:54:56,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-21 16:54:56,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-21 16:54:56,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151389864] [2024-06-21 16:54:56,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-21 16:54:56,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-21 16:54:56,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-21 16:54:56,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-21 16:54:56,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-21 16:54:56,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 44 [2024-06-21 16:54:56,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 619 transitions, 6981 flow. Second operand has 10 states, 10 states have (on average 12.6) internal successors, (126), 10 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-21 16:54:56,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-21 16:54:56,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 44 [2024-06-21 16:54:56,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-21 16:54:58,885 INFO L124 PetriNetUnfolderBase]: 4492/7318 cut-off events. [2024-06-21 16:54:58,886 INFO L125 PetriNetUnfolderBase]: For 3533601/3533603 co-relation queries the response was YES. [2024-06-21 16:54:58,988 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88244 conditions, 7318 events. 4492/7318 cut-off events. For 3533601/3533603 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 47811 event pairs, 919 based on Foata normal form. 6/7276 useless extension candidates. Maximal degree in co-relation 88015. Up to 6599 conditions per place. [2024-06-21 16:54:59,018 INFO L140 encePairwiseOnDemand]: 33/44 looper letters, 563 selfloop transitions, 36 changer transitions 0/652 dead transitions. [2024-06-21 16:54:59,018 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 652 transitions, 8899 flow [2024-06-21 16:54:59,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-21 16:54:59,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-21 16:54:59,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 179 transitions. [2024-06-21 16:54:59,019 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45202020202020204 [2024-06-21 16:54:59,019 INFO L175 Difference]: Start difference. First operand has 474 places, 619 transitions, 6981 flow. Second operand 9 states and 179 transitions. [2024-06-21 16:54:59,019 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 652 transitions, 8899 flow