./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-06-19_11-23-25.files/protection/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 7724a2de Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-06-19_11-23-25.files/protection/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-7724a2d-m [2024-06-27 19:50:07,939 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-27 19:50:07,997 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-27 19:50:08,003 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-27 19:50:08,004 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-27 19:50:08,029 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-27 19:50:08,030 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-27 19:50:08,030 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-27 19:50:08,031 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-27 19:50:08,035 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-27 19:50:08,035 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-27 19:50:08,035 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-27 19:50:08,036 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-27 19:50:08,038 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-27 19:50:08,038 INFO L153 SettingsManager]: * Use SBE=true [2024-06-27 19:50:08,038 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-27 19:50:08,038 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-27 19:50:08,038 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-27 19:50:08,039 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-27 19:50:08,039 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-27 19:50:08,039 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-27 19:50:08,039 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-27 19:50:08,040 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-27 19:50:08,040 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-27 19:50:08,040 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-27 19:50:08,040 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-27 19:50:08,040 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-27 19:50:08,041 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-27 19:50:08,041 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-27 19:50:08,041 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-27 19:50:08,042 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-27 19:50:08,042 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-27 19:50:08,042 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:50:08,043 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-27 19:50:08,043 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-27 19:50:08,043 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-27 19:50:08,043 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-27 19:50:08,043 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-27 19:50:08,044 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-27 19:50:08,044 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-27 19:50:08,044 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-27 19:50:08,044 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-27 19:50:08,044 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-27 19:50:08,045 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-27 19:50:08,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-27 19:50:08,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-27 19:50:08,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-27 19:50:08,289 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-27 19:50:08,290 INFO L274 PluginConnector]: CDTParser initialized [2024-06-27 19:50:08,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 19:50:09,278 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-27 19:50:09,478 INFO L384 CDTParser]: Found 1 translation units. [2024-06-27 19:50:09,479 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 19:50:09,496 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39112c455/40e6140eb4b7461097fa3d5dbcac0e0f/FLAGd03c0c76a [2024-06-27 19:50:09,511 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/39112c455/40e6140eb4b7461097fa3d5dbcac0e0f [2024-06-27 19:50:09,512 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-27 19:50:09,513 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-27 19:50:09,513 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-06-19_11-23-25.files/protection/mix006_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-27 19:50:09,662 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-27 19:50:09,663 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-27 19:50:09,664 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-27 19:50:09,664 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-27 19:50:09,669 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-27 19:50:09,669 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:50:09" (1/2) ... [2024-06-27 19:50:09,671 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffe0e4a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:50:09, skipping insertion in model container [2024-06-27 19:50:09,672 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.06 07:50:09" (1/2) ... [2024-06-27 19:50:09,673 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@74c64db4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.06 07:50:09, skipping insertion in model container [2024-06-27 19:50:09,673 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:50:09" (2/2) ... [2024-06-27 19:50:09,674 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2ffe0e4a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:09, skipping insertion in model container [2024-06-27 19:50:09,674 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:50:09" (2/2) ... [2024-06-27 19:50:09,674 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-27 19:50:09,741 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-27 19:50:09,742 INFO L97 edCorrectnessWitness]: Location invariant before [L848-L848] (((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-27 19:50:09,742 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] (((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-27 19:50:09,742 INFO L97 edCorrectnessWitness]: Location invariant before [L846-L846] (((((((((((((((((((! multithreaded || (z == 0 || z == 1)) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (y == 0 || y == 1))) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1))) && (! multithreaded || (z$w_buff1 == 0 || z$w_buff1 == 1))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || (z$mem_tmp == 0 || z$mem_tmp == 1))) && (! multithreaded || ((x == 0 || x == 1) || x == 2))) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || ((__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1) || __unbuffered_p1_EAX == 2))) && (! multithreaded || (z$w_buff0 == 0 || z$w_buff0 == 1))) && (! multithreaded || z$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || (__unbuffered_p1_EBX == 0 || __unbuffered_p1_EBX == 1))) && (! multithreaded || (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1))) && (! multithreaded || z$read_delayed == (_Bool)0) [2024-06-27 19:50:09,742 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-27 19:50:09,743 INFO L106 edCorrectnessWitness]: ghost_update [L844-L844] multithreaded = 1; [2024-06-27 19:50:09,779 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-27 19:50:10,079 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:50:10,087 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-27 19:50:10,248 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-27 19:50:10,276 INFO L206 MainTranslator]: Completed translation [2024-06-27 19:50:10,277 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10 WrapperNode [2024-06-27 19:50:10,277 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-27 19:50:10,278 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-27 19:50:10,278 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-27 19:50:10,278 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-27 19:50:10,283 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,301 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,323 INFO L138 Inliner]: procedures = 175, calls = 47, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 127 [2024-06-27 19:50:10,323 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-27 19:50:10,324 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-27 19:50:10,324 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-27 19:50:10,324 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-27 19:50:10,332 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,335 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,347 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-27 19:50:10,347 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,347 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,353 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,354 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,356 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,357 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,359 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-27 19:50:10,360 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-27 19:50:10,360 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-27 19:50:10,360 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-27 19:50:10,360 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (1/1) ... [2024-06-27 19:50:10,373 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-27 19:50:10,379 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-27 19:50:10,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-27 19:50:10,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-27 19:50:10,551 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-27 19:50:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-27 19:50:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-27 19:50:10,552 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-27 19:50:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-27 19:50:10,552 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-27 19:50:10,552 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-27 19:50:10,552 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-27 19:50:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-27 19:50:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-27 19:50:10,553 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-27 19:50:10,553 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-27 19:50:10,554 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-27 19:50:10,646 INFO L244 CfgBuilder]: Building ICFG [2024-06-27 19:50:10,648 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-27 19:50:10,933 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-27 19:50:10,935 INFO L293 CfgBuilder]: Performing block encoding [2024-06-27 19:50:11,089 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-27 19:50:11,090 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-27 19:50:11,091 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:50:11 BoogieIcfgContainer [2024-06-27 19:50:11,091 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-27 19:50:11,109 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-27 19:50:11,109 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-27 19:50:11,112 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-27 19:50:11,112 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.06 07:50:09" (1/4) ... [2024-06-27 19:50:11,113 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5c336 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.06 07:50:11, skipping insertion in model container [2024-06-27 19:50:11,113 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 27.06 07:50:09" (2/4) ... [2024-06-27 19:50:11,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5c336 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:50:11, skipping insertion in model container [2024-06-27 19:50:11,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 27.06 07:50:10" (3/4) ... [2024-06-27 19:50:11,114 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1b5c336 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 27.06 07:50:11, skipping insertion in model container [2024-06-27 19:50:11,114 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.06 07:50:11" (4/4) ... [2024-06-27 19:50:11,115 INFO L112 eAbstractionObserver]: Analyzing ICFG mix006_power.oepc_pso.oepc_rmo.oepc.i [2024-06-27 19:50:11,129 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-27 19:50:11,130 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-27 19:50:11,130 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-27 19:50:11,171 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-27 19:50:11,199 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 19:50:11,224 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-27 19:50:11,224 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:50:11,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 71 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-27 19:50:11,226 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-27 19:50:11,228 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-27 19:50:11,243 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-27 19:50:11,249 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;@3d9987c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-27 19:50:11,250 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-27 19:50:11,256 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-27 19:50:11,256 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-27 19:50:11,256 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-27 19:50:11,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:11,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-06-27 19:50:11,257 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)] === [2024-06-27 19:50:11,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:11,262 INFO L85 PathProgramCache]: Analyzing trace with hash 377005305, now seen corresponding path program 1 times [2024-06-27 19:50:11,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:11,272 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839188633] [2024-06-27 19:50:11,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:11,273 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:11,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:11,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:11,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839188633] [2024-06-27 19:50:11,920 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839188633] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:11,920 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:11,920 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-27 19:50:11,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134949425] [2024-06-27 19:50:11,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:11,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-27 19:50:11,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:11,949 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-27 19:50:11,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-27 19:50:11,994 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 19:50:11,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:11,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:11,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 19:50:11,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:12,325 INFO L124 PetriNetUnfolderBase]: 1363/2135 cut-off events. [2024-06-27 19:50:12,326 INFO L125 PetriNetUnfolderBase]: For 35/35 co-relation queries the response was YES. [2024-06-27 19:50:12,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4259 conditions, 2135 events. 1363/2135 cut-off events. For 35/35 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10695 event pairs, 964 based on Foata normal form. 1/2073 useless extension candidates. Maximal degree in co-relation 4247. Up to 2037 conditions per place. [2024-06-27 19:50:12,341 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 32 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-27 19:50:12,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 173 flow [2024-06-27 19:50:12,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-27 19:50:12,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-27 19:50:12,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2024-06-27 19:50:12,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6190476190476191 [2024-06-27 19:50:12,353 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 78 transitions. [2024-06-27 19:50:12,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 173 flow [2024-06-27 19:50:12,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 168 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-27 19:50:12,358 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-27 19:50:12,360 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-27 19:50:12,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-27 19:50:12,363 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-27 19:50:12,364 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.333333333333334) internal successors, (43), 3 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:12,364 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:12,364 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:12,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-27 19:50:12,365 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)] === [2024-06-27 19:50:12,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:12,366 INFO L85 PathProgramCache]: Analyzing trace with hash 1524958002, now seen corresponding path program 1 times [2024-06-27 19:50:12,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:12,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950190156] [2024-06-27 19:50:12,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:12,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:12,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:12,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:12,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:12,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950190156] [2024-06-27 19:50:12,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950190156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:12,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:12,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-27 19:50:12,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533995311] [2024-06-27 19:50:12,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:12,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-27 19:50:12,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:12,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-27 19:50:12,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-27 19:50:12,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 42 [2024-06-27 19:50:12,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:12,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:12,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 42 [2024-06-27 19:50:12,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:13,236 INFO L124 PetriNetUnfolderBase]: 1357/2136 cut-off events. [2024-06-27 19:50:13,236 INFO L125 PetriNetUnfolderBase]: For 410/410 co-relation queries the response was YES. [2024-06-27 19:50:13,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4803 conditions, 2136 events. 1357/2136 cut-off events. For 410/410 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 10701 event pairs, 840 based on Foata normal form. 3/2115 useless extension candidates. Maximal degree in co-relation 4791. Up to 2013 conditions per place. [2024-06-27 19:50:13,247 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 39 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-27 19:50:13,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 240 flow [2024-06-27 19:50:13,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-27 19:50:13,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-27 19:50:13,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 101 transitions. [2024-06-27 19:50:13,249 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6011904761904762 [2024-06-27 19:50:13,249 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 101 transitions. [2024-06-27 19:50:13,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 240 flow [2024-06-27 19:50:13,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 236 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-27 19:50:13,251 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-27 19:50:13,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-27 19:50:13,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-27 19:50:13,252 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-27 19:50:13,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.25) internal successors, (57), 4 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:13,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:13,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:13,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-27 19:50:13,253 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)] === [2024-06-27 19:50:13,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:13,254 INFO L85 PathProgramCache]: Analyzing trace with hash 29058688, now seen corresponding path program 1 times [2024-06-27 19:50:13,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:13,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077986837] [2024-06-27 19:50:13,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:13,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:13,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:13,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:13,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:13,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077986837] [2024-06-27 19:50:13,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077986837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:13,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:13,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-27 19:50:13,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190636583] [2024-06-27 19:50:13,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:13,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-27 19:50:13,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:13,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-27 19:50:13,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-27 19:50:13,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 19:50:13,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:13,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:13,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 19:50:13,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:14,137 INFO L124 PetriNetUnfolderBase]: 1661/2580 cut-off events. [2024-06-27 19:50:14,137 INFO L125 PetriNetUnfolderBase]: For 1329/1329 co-relation queries the response was YES. [2024-06-27 19:50:14,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6406 conditions, 2580 events. 1661/2580 cut-off events. For 1329/1329 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12701 event pairs, 812 based on Foata normal form. 5/2585 useless extension candidates. Maximal degree in co-relation 6392. Up to 2387 conditions per place. [2024-06-27 19:50:14,151 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-27 19:50:14,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 396 flow [2024-06-27 19:50:14,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:50:14,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:50:14,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-06-27 19:50:14,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6095238095238096 [2024-06-27 19:50:14,156 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 128 transitions. [2024-06-27 19:50:14,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 396 flow [2024-06-27 19:50:14,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 382 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-27 19:50:14,160 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-27 19:50:14,160 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-27 19:50:14,161 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-27 19:50:14,161 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-27 19:50:14,161 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:14,161 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:14,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:14,162 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-27 19:50:14,162 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)] === [2024-06-27 19:50:14,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:14,163 INFO L85 PathProgramCache]: Analyzing trace with hash 817703351, now seen corresponding path program 1 times [2024-06-27 19:50:14,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:14,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918892942] [2024-06-27 19:50:14,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:14,164 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:14,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:14,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:14,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:14,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918892942] [2024-06-27 19:50:14,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918892942] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:14,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:14,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:50:14,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456263348] [2024-06-27 19:50:14,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:14,873 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:50:14,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:14,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:50:14,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:50:14,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 19:50:14,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:14,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:14,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 19:50:14,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:15,308 INFO L124 PetriNetUnfolderBase]: 1669/2592 cut-off events. [2024-06-27 19:50:15,309 INFO L125 PetriNetUnfolderBase]: For 3080/3082 co-relation queries the response was YES. [2024-06-27 19:50:15,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7525 conditions, 2592 events. 1669/2592 cut-off events. For 3080/3082 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12792 event pairs, 666 based on Foata normal form. 7/2599 useless extension candidates. Maximal degree in co-relation 7508. Up to 2373 conditions per place. [2024-06-27 19:50:15,321 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 60 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-27 19:50:15,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 523 flow [2024-06-27 19:50:15,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:15,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:15,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-27 19:50:15,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5992063492063492 [2024-06-27 19:50:15,324 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 151 transitions. [2024-06-27 19:50:15,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 523 flow [2024-06-27 19:50:15,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 515 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-27 19:50:15,327 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 310 flow [2024-06-27 19:50:15,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-27 19:50:15,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-27 19:50:15,328 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 310 flow [2024-06-27 19:50:15,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:15,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:15,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:15,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-27 19:50:15,329 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:15,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:15,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2139342657, now seen corresponding path program 1 times [2024-06-27 19:50:15,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:15,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823679357] [2024-06-27 19:50:15,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:15,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:15,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:16,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:16,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:16,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823679357] [2024-06-27 19:50:16,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [823679357] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:16,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:16,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:16,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561565081] [2024-06-27 19:50:16,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:16,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:16,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:16,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:16,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:16,098 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 42 [2024-06-27 19:50:16,099 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:16,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:16,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 42 [2024-06-27 19:50:16,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:16,524 INFO L124 PetriNetUnfolderBase]: 1681/2612 cut-off events. [2024-06-27 19:50:16,525 INFO L125 PetriNetUnfolderBase]: For 4855/4857 co-relation queries the response was YES. [2024-06-27 19:50:16,530 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8396 conditions, 2612 events. 1681/2612 cut-off events. For 4855/4857 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12888 event pairs, 502 based on Foata normal form. 12/2624 useless extension candidates. Maximal degree in co-relation 8376. Up to 2341 conditions per place. [2024-06-27 19:50:16,541 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 64 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-27 19:50:16,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 624 flow [2024-06-27 19:50:16,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:16,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:16,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-27 19:50:16,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5782312925170068 [2024-06-27 19:50:16,542 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 310 flow. Second operand 7 states and 170 transitions. [2024-06-27 19:50:16,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 624 flow [2024-06-27 19:50:16,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 575 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:16,551 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 337 flow [2024-06-27 19:50:16,551 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 19:50:16,553 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 19:50:16,553 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 337 flow [2024-06-27 19:50:16,553 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 13.142857142857142) internal successors, (92), 7 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:16,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:16,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:16,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-27 19:50:16,557 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)] === [2024-06-27 19:50:16,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:16,557 INFO L85 PathProgramCache]: Analyzing trace with hash -799520460, now seen corresponding path program 1 times [2024-06-27 19:50:16,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:16,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896284183] [2024-06-27 19:50:16,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:16,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:16,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:17,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:17,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:17,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896284183] [2024-06-27 19:50:17,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896284183] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:17,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:17,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:50:17,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [603225186] [2024-06-27 19:50:17,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:17,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:50:17,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:17,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:50:17,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:50:17,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:17,087 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:17,087 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:17,087 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:17,087 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:17,556 INFO L124 PetriNetUnfolderBase]: 1676/2600 cut-off events. [2024-06-27 19:50:17,556 INFO L125 PetriNetUnfolderBase]: For 6554/6554 co-relation queries the response was YES. [2024-06-27 19:50:17,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8918 conditions, 2600 events. 1676/2600 cut-off events. For 6554/6554 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12779 event pairs, 659 based on Foata normal form. 2/2602 useless extension candidates. Maximal degree in co-relation 8896. Up to 2484 conditions per place. [2024-06-27 19:50:17,580 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 54 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-27 19:50:17,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 489 flow [2024-06-27 19:50:17,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:50:17,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:50:17,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-06-27 19:50:17,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-27 19:50:17,581 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 337 flow. Second operand 5 states and 96 transitions. [2024-06-27 19:50:17,582 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 489 flow [2024-06-27 19:50:17,585 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 425 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:17,587 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 297 flow [2024-06-27 19:50:17,587 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-27 19:50:17,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-27 19:50:17,590 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 297 flow [2024-06-27 19:50:17,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:17,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:17,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:17,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-27 19:50:17,591 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)] === [2024-06-27 19:50:17,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:17,591 INFO L85 PathProgramCache]: Analyzing trace with hash 956042634, now seen corresponding path program 1 times [2024-06-27 19:50:17,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:17,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259484017] [2024-06-27 19:50:17,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:17,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:17,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:18,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:18,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:18,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259484017] [2024-06-27 19:50:18,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259484017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:18,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:18,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:18,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014807995] [2024-06-27 19:50:18,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:18,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:18,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:18,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:18,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:18,213 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:18,214 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:18,214 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:18,214 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:18,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:18,755 INFO L124 PetriNetUnfolderBase]: 1666/2623 cut-off events. [2024-06-27 19:50:18,755 INFO L125 PetriNetUnfolderBase]: For 7722/7722 co-relation queries the response was YES. [2024-06-27 19:50:18,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8905 conditions, 2623 events. 1666/2623 cut-off events. For 7722/7722 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13058 event pairs, 623 based on Foata normal form. 4/2627 useless extension candidates. Maximal degree in co-relation 8881. Up to 2452 conditions per place. [2024-06-27 19:50:18,767 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 59 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-27 19:50:18,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 75 transitions, 497 flow [2024-06-27 19:50:18,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:18,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2024-06-27 19:50:18,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 19:50:18,768 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 297 flow. Second operand 6 states and 114 transitions. [2024-06-27 19:50:18,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 75 transitions, 497 flow [2024-06-27 19:50:18,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 75 transitions, 475 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:18,773 INFO L231 Difference]: Finished difference. Result has 61 places, 59 transitions, 331 flow [2024-06-27 19:50:18,773 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=331, PETRI_PLACES=61, PETRI_TRANSITIONS=59} [2024-06-27 19:50:18,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 18 predicate places. [2024-06-27 19:50:18,774 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 59 transitions, 331 flow [2024-06-27 19:50:18,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:18,774 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:18,774 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:18,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-27 19:50:18,775 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)] === [2024-06-27 19:50:18,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:18,775 INFO L85 PathProgramCache]: Analyzing trace with hash -433169935, now seen corresponding path program 1 times [2024-06-27 19:50:18,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:18,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637679786] [2024-06-27 19:50:18,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:18,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:18,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:19,394 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:19,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:19,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637679786] [2024-06-27 19:50:19,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637679786] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:19,395 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:19,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:19,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301845771] [2024-06-27 19:50:19,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:19,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:19,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:19,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:19,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:19,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:19,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 59 transitions, 331 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:19,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:19,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:19,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:19,827 INFO L124 PetriNetUnfolderBase]: 1672/2628 cut-off events. [2024-06-27 19:50:19,827 INFO L125 PetriNetUnfolderBase]: For 9597/9601 co-relation queries the response was YES. [2024-06-27 19:50:19,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9502 conditions, 2628 events. 1672/2628 cut-off events. For 9597/9601 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13108 event pairs, 636 based on Foata normal form. 8/2636 useless extension candidates. Maximal degree in co-relation 9478. Up to 2404 conditions per place. [2024-06-27 19:50:19,843 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 58 selfloop transitions, 19 changer transitions 0/82 dead transitions. [2024-06-27 19:50:19,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 82 transitions, 585 flow [2024-06-27 19:50:19,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:19,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:19,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-27 19:50:19,847 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48412698412698413 [2024-06-27 19:50:19,847 INFO L175 Difference]: Start difference. First operand has 61 places, 59 transitions, 331 flow. Second operand 6 states and 122 transitions. [2024-06-27 19:50:19,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 82 transitions, 585 flow [2024-06-27 19:50:19,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 82 transitions, 553 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:19,865 INFO L231 Difference]: Finished difference. Result has 63 places, 62 transitions, 371 flow [2024-06-27 19:50:19,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=371, PETRI_PLACES=63, PETRI_TRANSITIONS=62} [2024-06-27 19:50:19,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-27 19:50:19,866 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 62 transitions, 371 flow [2024-06-27 19:50:19,866 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:19,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:19,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:19,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-27 19:50:19,867 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)] === [2024-06-27 19:50:19,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:19,867 INFO L85 PathProgramCache]: Analyzing trace with hash 1614720727, now seen corresponding path program 2 times [2024-06-27 19:50:19,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:19,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [978161291] [2024-06-27 19:50:19,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:19,868 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:19,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:20,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:20,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:20,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [978161291] [2024-06-27 19:50:20,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [978161291] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:20,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:20,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:20,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630732384] [2024-06-27 19:50:20,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:20,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:20,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:20,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:20,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:20,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:20,490 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 62 transitions, 371 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:20,490 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:20,490 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:20,490 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:20,874 INFO L124 PetriNetUnfolderBase]: 1657/2602 cut-off events. [2024-06-27 19:50:20,875 INFO L125 PetriNetUnfolderBase]: For 11066/11066 co-relation queries the response was YES. [2024-06-27 19:50:20,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9664 conditions, 2602 events. 1657/2602 cut-off events. For 11066/11066 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 12911 event pairs, 632 based on Foata normal form. 2/2604 useless extension candidates. Maximal degree in co-relation 9639. Up to 2445 conditions per place. [2024-06-27 19:50:20,886 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 61 selfloop transitions, 11 changer transitions 0/77 dead transitions. [2024-06-27 19:50:20,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 77 transitions, 553 flow [2024-06-27 19:50:20,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:20,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:20,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2024-06-27 19:50:20,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44841269841269843 [2024-06-27 19:50:20,888 INFO L175 Difference]: Start difference. First operand has 63 places, 62 transitions, 371 flow. Second operand 6 states and 113 transitions. [2024-06-27 19:50:20,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 77 transitions, 553 flow [2024-06-27 19:50:20,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 524 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-27 19:50:20,894 INFO L231 Difference]: Finished difference. Result has 66 places, 62 transitions, 372 flow [2024-06-27 19:50:20,895 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=372, PETRI_PLACES=66, PETRI_TRANSITIONS=62} [2024-06-27 19:50:20,895 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 23 predicate places. [2024-06-27 19:50:20,895 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 62 transitions, 372 flow [2024-06-27 19:50:20,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:20,896 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:20,896 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:20,896 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-27 19:50:20,896 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)] === [2024-06-27 19:50:20,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:20,896 INFO L85 PathProgramCache]: Analyzing trace with hash 1919588069, now seen corresponding path program 1 times [2024-06-27 19:50:20,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:20,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [205820350] [2024-06-27 19:50:20,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:20,897 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:20,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:21,523 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:21,523 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [205820350] [2024-06-27 19:50:21,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [205820350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:21,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:21,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:21,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860662185] [2024-06-27 19:50:21,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:21,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:21,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:21,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:21,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:21,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:21,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 372 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 19:50:21,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:21,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:21,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:21,989 INFO L124 PetriNetUnfolderBase]: 1733/2713 cut-off events. [2024-06-27 19:50:21,989 INFO L125 PetriNetUnfolderBase]: For 13636/13636 co-relation queries the response was YES. [2024-06-27 19:50:21,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10300 conditions, 2713 events. 1733/2713 cut-off events. For 13636/13636 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13490 event pairs, 559 based on Foata normal form. 8/2720 useless extension candidates. Maximal degree in co-relation 10274. Up to 2371 conditions per place. [2024-06-27 19:50:22,007 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 68 selfloop transitions, 26 changer transitions 0/99 dead transitions. [2024-06-27 19:50:22,007 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 99 transitions, 726 flow [2024-06-27 19:50:22,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:22,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:22,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 144 transitions. [2024-06-27 19:50:22,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4897959183673469 [2024-06-27 19:50:22,009 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 372 flow. Second operand 7 states and 144 transitions. [2024-06-27 19:50:22,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 99 transitions, 726 flow [2024-06-27 19:50:22,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 99 transitions, 679 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:22,019 INFO L231 Difference]: Finished difference. Result has 68 places, 72 transitions, 468 flow [2024-06-27 19:50:22,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=325, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=468, PETRI_PLACES=68, PETRI_TRANSITIONS=72} [2024-06-27 19:50:22,021 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-27 19:50:22,021 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 72 transitions, 468 flow [2024-06-27 19:50:22,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 19:50:22,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:22,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:22,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-27 19:50:22,022 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)] === [2024-06-27 19:50:22,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:22,023 INFO L85 PathProgramCache]: Analyzing trace with hash 1375890695, now seen corresponding path program 2 times [2024-06-27 19:50:22,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:22,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714180613] [2024-06-27 19:50:22,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:22,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:22,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:22,678 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:22,679 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:22,679 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714180613] [2024-06-27 19:50:22,679 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714180613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:22,679 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:22,679 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:22,679 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286481645] [2024-06-27 19:50:22,679 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:22,680 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:22,680 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:22,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:22,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:22,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:22,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 72 transitions, 468 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 19:50:22,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:22,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:22,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:23,262 INFO L124 PetriNetUnfolderBase]: 1755/2745 cut-off events. [2024-06-27 19:50:23,262 INFO L125 PetriNetUnfolderBase]: For 16752/16752 co-relation queries the response was YES. [2024-06-27 19:50:23,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11396 conditions, 2745 events. 1755/2745 cut-off events. For 16752/16752 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13620 event pairs, 586 based on Foata normal form. 4/2749 useless extension candidates. Maximal degree in co-relation 11368. Up to 2569 conditions per place. [2024-06-27 19:50:23,275 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 76 selfloop transitions, 14 changer transitions 0/95 dead transitions. [2024-06-27 19:50:23,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 95 transitions, 730 flow [2024-06-27 19:50:23,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:23,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:23,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-27 19:50:23,277 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-27 19:50:23,277 INFO L175 Difference]: Start difference. First operand has 68 places, 72 transitions, 468 flow. Second operand 7 states and 131 transitions. [2024-06-27 19:50:23,277 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 95 transitions, 730 flow [2024-06-27 19:50:23,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 95 transitions, 702 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-27 19:50:23,290 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 512 flow [2024-06-27 19:50:23,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=440, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=512, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-27 19:50:23,290 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 30 predicate places. [2024-06-27 19:50:23,290 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 512 flow [2024-06-27 19:50:23,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 19:50:23,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:23,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:23,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-27 19:50:23,291 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)] === [2024-06-27 19:50:23,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:23,291 INFO L85 PathProgramCache]: Analyzing trace with hash -1511863067, now seen corresponding path program 3 times [2024-06-27 19:50:23,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:23,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916072243] [2024-06-27 19:50:23,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:23,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:23,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:23,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916072243] [2024-06-27 19:50:23,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916072243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:23,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:23,847 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:23,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920452332] [2024-06-27 19:50:23,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:23,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:23,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:23,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:23,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:23,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:23,982 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 512 flow. Second operand has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 19:50:23,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:23,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:23,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:24,420 INFO L124 PetriNetUnfolderBase]: 1745/2731 cut-off events. [2024-06-27 19:50:24,421 INFO L125 PetriNetUnfolderBase]: For 19600/19600 co-relation queries the response was YES. [2024-06-27 19:50:24,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11651 conditions, 2731 events. 1745/2731 cut-off events. For 19600/19600 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13556 event pairs, 584 based on Foata normal form. 4/2735 useless extension candidates. Maximal degree in co-relation 11620. Up to 2528 conditions per place. [2024-06-27 19:50:24,436 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 75 selfloop transitions, 19 changer transitions 0/99 dead transitions. [2024-06-27 19:50:24,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 99 transitions, 792 flow [2024-06-27 19:50:24,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:24,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-27 19:50:24,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4557823129251701 [2024-06-27 19:50:24,438 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 512 flow. Second operand 7 states and 134 transitions. [2024-06-27 19:50:24,438 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 99 transitions, 792 flow [2024-06-27 19:50:24,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 99 transitions, 744 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:24,454 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 552 flow [2024-06-27 19:50:24,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=464, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=552, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-06-27 19:50:24,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 19:50:24,455 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 552 flow [2024-06-27 19:50:24,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.375) internal successors, (91), 8 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) [2024-06-27 19:50:24,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:24,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:24,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-27 19:50:24,455 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)] === [2024-06-27 19:50:24,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:24,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1153240174, now seen corresponding path program 1 times [2024-06-27 19:50:24,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:24,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072156780] [2024-06-27 19:50:24,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:24,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:24,861 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:24,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:24,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072156780] [2024-06-27 19:50:24,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072156780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:24,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:24,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-27 19:50:24,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509155340] [2024-06-27 19:50:24,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:24,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-27 19:50:24,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:24,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-27 19:50:24,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-27 19:50:24,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:50:24,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 552 flow. Second operand has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:24,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:24,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:50:24,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:25,339 INFO L124 PetriNetUnfolderBase]: 2236/3362 cut-off events. [2024-06-27 19:50:25,339 INFO L125 PetriNetUnfolderBase]: For 29493/29493 co-relation queries the response was YES. [2024-06-27 19:50:25,347 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14830 conditions, 3362 events. 2236/3362 cut-off events. For 29493/29493 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15975 event pairs, 822 based on Foata normal form. 1/3363 useless extension candidates. Maximal degree in co-relation 14799. Up to 3267 conditions per place. [2024-06-27 19:50:25,359 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 71 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2024-06-27 19:50:25,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 89 transitions, 752 flow [2024-06-27 19:50:25,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-27 19:50:25,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-27 19:50:25,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-27 19:50:25,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 19:50:25,360 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 552 flow. Second operand 5 states and 88 transitions. [2024-06-27 19:50:25,360 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 89 transitions, 752 flow [2024-06-27 19:50:25,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 89 transitions, 692 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:25,381 INFO L231 Difference]: Finished difference. Result has 75 places, 81 transitions, 542 flow [2024-06-27 19:50:25,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=492, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=542, PETRI_PLACES=75, PETRI_TRANSITIONS=81} [2024-06-27 19:50:25,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-27 19:50:25,382 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 81 transitions, 542 flow [2024-06-27 19:50:25,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.0) internal successors, (66), 6 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:25,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:25,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:25,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-27 19:50:25,383 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)] === [2024-06-27 19:50:25,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:25,383 INFO L85 PathProgramCache]: Analyzing trace with hash 331746832, now seen corresponding path program 1 times [2024-06-27 19:50:25,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:25,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166353914] [2024-06-27 19:50:25,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:25,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:25,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:26,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:26,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166353914] [2024-06-27 19:50:26,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166353914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:26,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:26,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:26,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667595747] [2024-06-27 19:50:26,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:26,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:26,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:26,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:26,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:26,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:26,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 81 transitions, 542 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:26,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:26,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:26,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:26,843 INFO L124 PetriNetUnfolderBase]: 1830/2829 cut-off events. [2024-06-27 19:50:26,844 INFO L125 PetriNetUnfolderBase]: For 28816/28818 co-relation queries the response was YES. [2024-06-27 19:50:26,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13189 conditions, 2829 events. 1830/2829 cut-off events. For 28816/28818 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13971 event pairs, 608 based on Foata normal form. 4/2833 useless extension candidates. Maximal degree in co-relation 13157. Up to 2556 conditions per place. [2024-06-27 19:50:26,858 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 26 changer transitions 0/113 dead transitions. [2024-06-27 19:50:26,858 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 113 transitions, 858 flow [2024-06-27 19:50:26,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:26,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:26,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-27 19:50:26,859 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-27 19:50:26,860 INFO L175 Difference]: Start difference. First operand has 75 places, 81 transitions, 542 flow. Second operand 8 states and 158 transitions. [2024-06-27 19:50:26,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 113 transitions, 858 flow [2024-06-27 19:50:26,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 113 transitions, 830 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-27 19:50:26,876 INFO L231 Difference]: Finished difference. Result has 80 places, 84 transitions, 609 flow [2024-06-27 19:50:26,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=609, PETRI_PLACES=80, PETRI_TRANSITIONS=84} [2024-06-27 19:50:26,877 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 37 predicate places. [2024-06-27 19:50:26,877 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 84 transitions, 609 flow [2024-06-27 19:50:26,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:26,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:26,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-27 19:50:26,878 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)] === [2024-06-27 19:50:26,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:26,878 INFO L85 PathProgramCache]: Analyzing trace with hash 335561847, now seen corresponding path program 1 times [2024-06-27 19:50:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:26,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393929971] [2024-06-27 19:50:26,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:26,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:26,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:27,628 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:27,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:27,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393929971] [2024-06-27 19:50:27,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393929971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:27,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:27,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:27,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998659961] [2024-06-27 19:50:27,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:27,629 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:27,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:27,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:27,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:27,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:27,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 84 transitions, 609 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:50:27,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:27,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:27,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:28,230 INFO L124 PetriNetUnfolderBase]: 1852/2865 cut-off events. [2024-06-27 19:50:28,230 INFO L125 PetriNetUnfolderBase]: For 33308/33308 co-relation queries the response was YES. [2024-06-27 19:50:28,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14003 conditions, 2865 events. 1852/2865 cut-off events. For 33308/33308 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14187 event pairs, 575 based on Foata normal form. 4/2868 useless extension candidates. Maximal degree in co-relation 13970. Up to 2478 conditions per place. [2024-06-27 19:50:28,249 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 79 selfloop transitions, 33 changer transitions 0/118 dead transitions. [2024-06-27 19:50:28,250 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 118 transitions, 1005 flow [2024-06-27 19:50:28,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:28,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:28,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 162 transitions. [2024-06-27 19:50:28,251 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48214285714285715 [2024-06-27 19:50:28,251 INFO L175 Difference]: Start difference. First operand has 80 places, 84 transitions, 609 flow. Second operand 8 states and 162 transitions. [2024-06-27 19:50:28,251 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 118 transitions, 1005 flow [2024-06-27 19:50:28,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 118 transitions, 936 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:28,296 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 650 flow [2024-06-27 19:50:28,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=540, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=650, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-27 19:50:28,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-27 19:50:28,296 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 650 flow [2024-06-27 19:50:28,297 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:50:28,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:28,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:28,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-27 19:50:28,297 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)] === [2024-06-27 19:50:28,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:28,298 INFO L85 PathProgramCache]: Analyzing trace with hash 335556267, now seen corresponding path program 2 times [2024-06-27 19:50:28,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:28,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766951272] [2024-06-27 19:50:28,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:28,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:28,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:28,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:28,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:28,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1766951272] [2024-06-27 19:50:28,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1766951272] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:28,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:28,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:50:28,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752286194] [2024-06-27 19:50:28,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:28,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:50:28,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:28,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:50:28,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:50:29,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:29,024 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 650 flow. Second operand has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:29,024 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:29,024 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:29,024 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:29,460 INFO L124 PetriNetUnfolderBase]: 1874/2897 cut-off events. [2024-06-27 19:50:29,460 INFO L125 PetriNetUnfolderBase]: For 37698/37698 co-relation queries the response was YES. [2024-06-27 19:50:29,467 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14490 conditions, 2897 events. 1874/2897 cut-off events. For 37698/37698 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14406 event pairs, 573 based on Foata normal form. 4/2900 useless extension candidates. Maximal degree in co-relation 14456. Up to 2497 conditions per place. [2024-06-27 19:50:29,475 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 75 selfloop transitions, 39 changer transitions 0/120 dead transitions. [2024-06-27 19:50:29,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 120 transitions, 1058 flow [2024-06-27 19:50:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:50:29,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:50:29,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 148 transitions. [2024-06-27 19:50:29,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5034013605442177 [2024-06-27 19:50:29,477 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 650 flow. Second operand 7 states and 148 transitions. [2024-06-27 19:50:29,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 120 transitions, 1058 flow [2024-06-27 19:50:29,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 120 transitions, 962 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:29,498 INFO L231 Difference]: Finished difference. Result has 83 places, 90 transitions, 682 flow [2024-06-27 19:50:29,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=560, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=682, PETRI_PLACES=83, PETRI_TRANSITIONS=90} [2024-06-27 19:50:29,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 40 predicate places. [2024-06-27 19:50:29,499 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 90 transitions, 682 flow [2024-06-27 19:50:29,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 11.5) internal successors, (92), 8 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:29,499 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:29,499 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:29,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-27 19:50:29,500 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)] === [2024-06-27 19:50:29,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:29,500 INFO L85 PathProgramCache]: Analyzing trace with hash 1263668271, now seen corresponding path program 3 times [2024-06-27 19:50:29,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:29,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868706341] [2024-06-27 19:50:29,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:29,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:29,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:30,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:30,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868706341] [2024-06-27 19:50:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868706341] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:30,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:30,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:30,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450515894] [2024-06-27 19:50:30,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:30,073 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:30,073 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:30,073 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:30,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:30,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 90 transitions, 682 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:50:30,155 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:30,155 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:30,155 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:30,651 INFO L124 PetriNetUnfolderBase]: 1896/2929 cut-off events. [2024-06-27 19:50:30,651 INFO L125 PetriNetUnfolderBase]: For 41619/41619 co-relation queries the response was YES. [2024-06-27 19:50:30,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14907 conditions, 2929 events. 1896/2929 cut-off events. For 41619/41619 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 14578 event pairs, 609 based on Foata normal form. 4/2933 useless extension candidates. Maximal degree in co-relation 14872. Up to 2711 conditions per place. [2024-06-27 19:50:30,666 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 95 selfloop transitions, 17 changer transitions 0/118 dead transitions. [2024-06-27 19:50:30,667 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 118 transitions, 1014 flow [2024-06-27 19:50:30,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:30,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:30,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:50:30,668 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 19:50:30,668 INFO L175 Difference]: Start difference. First operand has 83 places, 90 transitions, 682 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:50:30,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 118 transitions, 1014 flow [2024-06-27 19:50:30,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 118 transitions, 929 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:30,701 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 687 flow [2024-06-27 19:50:30,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=600, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=687, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-27 19:50:30,702 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-27 19:50:30,702 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 687 flow [2024-06-27 19:50:30,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:50:30,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:30,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:30,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-27 19:50:30,702 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)] === [2024-06-27 19:50:30,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:30,703 INFO L85 PathProgramCache]: Analyzing trace with hash -2018593127, now seen corresponding path program 4 times [2024-06-27 19:50:30,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:30,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452740226] [2024-06-27 19:50:30,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:30,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:30,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:31,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:31,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:31,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452740226] [2024-06-27 19:50:31,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452740226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:31,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:31,418 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:31,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087260973] [2024-06-27 19:50:31,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:31,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:31,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:31,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:31,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:31,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:31,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 687 flow. Second operand has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:50:31,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:31,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:31,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:32,083 INFO L124 PetriNetUnfolderBase]: 1886/2915 cut-off events. [2024-06-27 19:50:32,083 INFO L125 PetriNetUnfolderBase]: For 45121/45121 co-relation queries the response was YES. [2024-06-27 19:50:32,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14905 conditions, 2915 events. 1886/2915 cut-off events. For 45121/45121 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14510 event pairs, 602 based on Foata normal form. 4/2919 useless extension candidates. Maximal degree in co-relation 14869. Up to 2670 conditions per place. [2024-06-27 19:50:32,100 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 91 selfloop transitions, 22 changer transitions 0/119 dead transitions. [2024-06-27 19:50:32,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 119 transitions, 983 flow [2024-06-27 19:50:32,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:32,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:50:32,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 19:50:32,101 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 687 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:50:32,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 119 transitions, 983 flow [2024-06-27 19:50:32,136 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 119 transitions, 909 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:32,138 INFO L231 Difference]: Finished difference. Result has 89 places, 93 transitions, 665 flow [2024-06-27 19:50:32,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=613, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=665, PETRI_PLACES=89, PETRI_TRANSITIONS=93} [2024-06-27 19:50:32,138 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-27 19:50:32,139 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 93 transitions, 665 flow [2024-06-27 19:50:32,139 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.333333333333334) internal successors, (102), 9 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) [2024-06-27 19:50:32,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:32,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:32,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-27 19:50:32,139 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)] === [2024-06-27 19:50:32,140 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:32,140 INFO L85 PathProgramCache]: Analyzing trace with hash -2010964430, now seen corresponding path program 1 times [2024-06-27 19:50:32,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:32,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311297831] [2024-06-27 19:50:32,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:32,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:32,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:33,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:33,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:33,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311297831] [2024-06-27 19:50:33,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311297831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:33,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:33,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:50:33,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166459651] [2024-06-27 19:50:33,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:33,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:50:33,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:33,299 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:50:33,299 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:50:33,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:50:33,448 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 93 transitions, 665 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:33,448 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:33,448 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:50:33,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:34,163 INFO L124 PetriNetUnfolderBase]: 2240/3399 cut-off events. [2024-06-27 19:50:34,163 INFO L125 PetriNetUnfolderBase]: For 56677/56677 co-relation queries the response was YES. [2024-06-27 19:50:34,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 3399 events. 2240/3399 cut-off events. For 56677/56677 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16372 event pairs, 741 based on Foata normal form. 4/3403 useless extension candidates. Maximal degree in co-relation 17256. Up to 3208 conditions per place. [2024-06-27 19:50:34,183 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 99 selfloop transitions, 18 changer transitions 0/122 dead transitions. [2024-06-27 19:50:34,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 122 transitions, 1009 flow [2024-06-27 19:50:34,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:34,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:34,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 19:50:34,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 19:50:34,185 INFO L175 Difference]: Start difference. First operand has 89 places, 93 transitions, 665 flow. Second operand 8 states and 141 transitions. [2024-06-27 19:50:34,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 122 transitions, 1009 flow [2024-06-27 19:50:34,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 122 transitions, 912 flow, removed 5 selfloop flow, removed 8 redundant places. [2024-06-27 19:50:34,217 INFO L231 Difference]: Finished difference. Result has 90 places, 98 transitions, 671 flow [2024-06-27 19:50:34,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=573, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=671, PETRI_PLACES=90, PETRI_TRANSITIONS=98} [2024-06-27 19:50:34,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-27 19:50:34,218 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 98 transitions, 671 flow [2024-06-27 19:50:34,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:34,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:34,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:34,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-27 19:50:34,218 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:34,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:34,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1390705951, now seen corresponding path program 1 times [2024-06-27 19:50:34,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:34,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [146649839] [2024-06-27 19:50:34,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:34,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:34,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:34,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:34,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:34,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [146649839] [2024-06-27 19:50:34,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [146649839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:34,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:34,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:34,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767931031] [2024-06-27 19:50:34,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:34,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:34,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:34,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:34,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:34,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:50:34,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 98 transitions, 671 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 19:50:34,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:34,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:50:34,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:35,380 INFO L124 PetriNetUnfolderBase]: 2292/3448 cut-off events. [2024-06-27 19:50:35,380 INFO L125 PetriNetUnfolderBase]: For 60807/60807 co-relation queries the response was YES. [2024-06-27 19:50:35,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17740 conditions, 3448 events. 2292/3448 cut-off events. For 60807/60807 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 16276 event pairs, 802 based on Foata normal form. 3/3451 useless extension candidates. Maximal degree in co-relation 17701. Up to 3348 conditions per place. [2024-06-27 19:50:35,400 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 90 selfloop transitions, 11 changer transitions 0/112 dead transitions. [2024-06-27 19:50:35,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 112 transitions, 927 flow [2024-06-27 19:50:35,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:35,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:35,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-27 19:50:35,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-27 19:50:35,402 INFO L175 Difference]: Start difference. First operand has 90 places, 98 transitions, 671 flow. Second operand 6 states and 103 transitions. [2024-06-27 19:50:35,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 112 transitions, 927 flow [2024-06-27 19:50:35,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 112 transitions, 872 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:35,430 INFO L231 Difference]: Finished difference. Result has 91 places, 101 transitions, 678 flow [2024-06-27 19:50:35,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=616, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=678, PETRI_PLACES=91, PETRI_TRANSITIONS=101} [2024-06-27 19:50:35,430 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-27 19:50:35,430 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 101 transitions, 678 flow [2024-06-27 19:50:35,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 19:50:35,431 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:35,431 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:35,431 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-27 19:50:35,431 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:35,431 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:35,431 INFO L85 PathProgramCache]: Analyzing trace with hash 1694157934, now seen corresponding path program 1 times [2024-06-27 19:50:35,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:35,432 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577401413] [2024-06-27 19:50:35,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:35,432 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:35,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:36,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:36,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:36,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577401413] [2024-06-27 19:50:36,273 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577401413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:36,273 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:36,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:36,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341892300] [2024-06-27 19:50:36,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:36,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:36,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:36,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:36,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:36,419 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:36,420 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 101 transitions, 678 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:36,420 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:36,420 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:36,420 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:36,961 INFO L124 PetriNetUnfolderBase]: 2124/3270 cut-off events. [2024-06-27 19:50:36,962 INFO L125 PetriNetUnfolderBase]: For 65040/65042 co-relation queries the response was YES. [2024-06-27 19:50:36,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17647 conditions, 3270 events. 2124/3270 cut-off events. For 65040/65042 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16374 event pairs, 552 based on Foata normal form. 6/3271 useless extension candidates. Maximal degree in co-relation 17607. Up to 2880 conditions per place. [2024-06-27 19:50:36,979 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 102 selfloop transitions, 29 changer transitions 0/138 dead transitions. [2024-06-27 19:50:36,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 138 transitions, 1158 flow [2024-06-27 19:50:36,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:36,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:36,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:50:36,982 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 19:50:36,982 INFO L175 Difference]: Start difference. First operand has 91 places, 101 transitions, 678 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:50:36,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 138 transitions, 1158 flow [2024-06-27 19:50:37,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 138 transitions, 1118 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:37,012 INFO L231 Difference]: Finished difference. Result has 95 places, 105 transitions, 767 flow [2024-06-27 19:50:37,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=638, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=767, PETRI_PLACES=95, PETRI_TRANSITIONS=105} [2024-06-27 19:50:37,013 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-27 19:50:37,013 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 105 transitions, 767 flow [2024-06-27 19:50:37,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:37,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:37,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:37,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-27 19:50:37,015 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)] === [2024-06-27 19:50:37,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:37,015 INFO L85 PathProgramCache]: Analyzing trace with hash 2064934826, now seen corresponding path program 2 times [2024-06-27 19:50:37,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:37,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753523717] [2024-06-27 19:50:37,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:37,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:37,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:38,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:38,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:38,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753523717] [2024-06-27 19:50:38,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753523717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:38,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:38,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:38,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610424364] [2024-06-27 19:50:38,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:38,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:38,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:38,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:38,195 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:38,195 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 105 transitions, 767 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:38,195 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:38,195 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:38,195 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:38,754 INFO L124 PetriNetUnfolderBase]: 2152/3313 cut-off events. [2024-06-27 19:50:38,755 INFO L125 PetriNetUnfolderBase]: For 71715/71717 co-relation queries the response was YES. [2024-06-27 19:50:38,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18375 conditions, 3313 events. 2152/3313 cut-off events. For 71715/71717 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 16648 event pairs, 677 based on Foata normal form. 6/3314 useless extension candidates. Maximal degree in co-relation 18334. Up to 2996 conditions per place. [2024-06-27 19:50:38,774 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 105 selfloop transitions, 28 changer transitions 0/140 dead transitions. [2024-06-27 19:50:38,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 140 transitions, 1161 flow [2024-06-27 19:50:38,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:38,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:38,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-27 19:50:38,776 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46726190476190477 [2024-06-27 19:50:38,776 INFO L175 Difference]: Start difference. First operand has 95 places, 105 transitions, 767 flow. Second operand 8 states and 157 transitions. [2024-06-27 19:50:38,776 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 140 transitions, 1161 flow [2024-06-27 19:50:38,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 140 transitions, 1093 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:38,821 INFO L231 Difference]: Finished difference. Result has 99 places, 110 transitions, 818 flow [2024-06-27 19:50:38,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=708, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=818, PETRI_PLACES=99, PETRI_TRANSITIONS=110} [2024-06-27 19:50:38,821 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 56 predicate places. [2024-06-27 19:50:38,822 INFO L495 AbstractCegarLoop]: Abstraction has has 99 places, 110 transitions, 818 flow [2024-06-27 19:50:38,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:38,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:38,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:38,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-27 19:50:38,822 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)] === [2024-06-27 19:50:38,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:38,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1694218508, now seen corresponding path program 1 times [2024-06-27 19:50:38,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:38,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687827662] [2024-06-27 19:50:38,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:38,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:38,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:39,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:39,620 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:39,620 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687827662] [2024-06-27 19:50:39,620 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687827662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:39,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:39,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:39,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970497536] [2024-06-27 19:50:39,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:39,620 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:39,620 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:39,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:39,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:39,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:39,736 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 99 places, 110 transitions, 818 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:39,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:39,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:39,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:40,354 INFO L124 PetriNetUnfolderBase]: 2176/3346 cut-off events. [2024-06-27 19:50:40,355 INFO L125 PetriNetUnfolderBase]: For 78493/78493 co-relation queries the response was YES. [2024-06-27 19:50:40,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18834 conditions, 3346 events. 2176/3346 cut-off events. For 78493/78493 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 16819 event pairs, 611 based on Foata normal form. 4/3343 useless extension candidates. Maximal degree in co-relation 18791. Up to 2740 conditions per place. [2024-06-27 19:50:40,375 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 56 changer transitions 0/160 dead transitions. [2024-06-27 19:50:40,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 160 transitions, 1510 flow [2024-06-27 19:50:40,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:50:40,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:50:40,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 184 transitions. [2024-06-27 19:50:40,376 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48677248677248675 [2024-06-27 19:50:40,376 INFO L175 Difference]: Start difference. First operand has 99 places, 110 transitions, 818 flow. Second operand 9 states and 184 transitions. [2024-06-27 19:50:40,376 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 160 transitions, 1510 flow [2024-06-27 19:50:40,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 160 transitions, 1450 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-27 19:50:40,420 INFO L231 Difference]: Finished difference. Result has 105 places, 119 transitions, 1021 flow [2024-06-27 19:50:40,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=758, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1021, PETRI_PLACES=105, PETRI_TRANSITIONS=119} [2024-06-27 19:50:40,421 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 62 predicate places. [2024-06-27 19:50:40,421 INFO L495 AbstractCegarLoop]: Abstraction has has 105 places, 119 transitions, 1021 flow [2024-06-27 19:50:40,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:40,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:40,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:40,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-27 19:50:40,422 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)] === [2024-06-27 19:50:40,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:40,422 INFO L85 PathProgramCache]: Analyzing trace with hash -39906168, now seen corresponding path program 2 times [2024-06-27 19:50:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:40,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592797139] [2024-06-27 19:50:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:40,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:41,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:41,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:41,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592797139] [2024-06-27 19:50:41,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592797139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:41,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:41,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:41,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246359013] [2024-06-27 19:50:41,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:41,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:41,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:41,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:41,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:41,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:41,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 119 transitions, 1021 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:41,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:41,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:41,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:41,881 INFO L124 PetriNetUnfolderBase]: 2198/3383 cut-off events. [2024-06-27 19:50:41,881 INFO L125 PetriNetUnfolderBase]: For 86406/86406 co-relation queries the response was YES. [2024-06-27 19:50:41,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20043 conditions, 3383 events. 2198/3383 cut-off events. For 86406/86406 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17091 event pairs, 624 based on Foata normal form. 4/3385 useless extension candidates. Maximal degree in co-relation 19998. Up to 2928 conditions per place. [2024-06-27 19:50:41,901 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 100 selfloop transitions, 44 changer transitions 0/151 dead transitions. [2024-06-27 19:50:41,902 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 151 transitions, 1427 flow [2024-06-27 19:50:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:41,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:41,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-27 19:50:41,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-27 19:50:41,903 INFO L175 Difference]: Start difference. First operand has 105 places, 119 transitions, 1021 flow. Second operand 8 states and 160 transitions. [2024-06-27 19:50:41,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 151 transitions, 1427 flow [2024-06-27 19:50:41,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 151 transitions, 1367 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-27 19:50:41,962 INFO L231 Difference]: Finished difference. Result has 110 places, 122 transitions, 1103 flow [2024-06-27 19:50:41,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=967, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1103, PETRI_PLACES=110, PETRI_TRANSITIONS=122} [2024-06-27 19:50:41,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-27 19:50:41,963 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 122 transitions, 1103 flow [2024-06-27 19:50:41,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:41,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:41,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:41,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-27 19:50:41,963 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)] === [2024-06-27 19:50:41,964 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:41,964 INFO L85 PathProgramCache]: Analyzing trace with hash -39910818, now seen corresponding path program 3 times [2024-06-27 19:50:41,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:41,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1489791714] [2024-06-27 19:50:41,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:41,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:41,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:42,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:42,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:42,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1489791714] [2024-06-27 19:50:42,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1489791714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:42,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:42,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:42,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1934620118] [2024-06-27 19:50:42,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:42,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:42,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:42,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:42,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:42,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:42,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 122 transitions, 1103 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:42,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:42,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:42,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:43,333 INFO L124 PetriNetUnfolderBase]: 2220/3421 cut-off events. [2024-06-27 19:50:43,334 INFO L125 PetriNetUnfolderBase]: For 93806/93806 co-relation queries the response was YES. [2024-06-27 19:50:43,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20686 conditions, 3421 events. 2220/3421 cut-off events. For 93806/93806 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17314 event pairs, 628 based on Foata normal form. 4/3423 useless extension candidates. Maximal degree in co-relation 20639. Up to 2900 conditions per place. [2024-06-27 19:50:43,356 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 97 selfloop transitions, 54 changer transitions 0/158 dead transitions. [2024-06-27 19:50:43,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 158 transitions, 1635 flow [2024-06-27 19:50:43,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:43,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:43,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2024-06-27 19:50:43,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49107142857142855 [2024-06-27 19:50:43,358 INFO L175 Difference]: Start difference. First operand has 110 places, 122 transitions, 1103 flow. Second operand 8 states and 165 transitions. [2024-06-27 19:50:43,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 158 transitions, 1635 flow [2024-06-27 19:50:43,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 158 transitions, 1529 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:43,422 INFO L231 Difference]: Finished difference. Result has 112 places, 125 transitions, 1159 flow [2024-06-27 19:50:43,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=997, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1159, PETRI_PLACES=112, PETRI_TRANSITIONS=125} [2024-06-27 19:50:43,423 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 69 predicate places. [2024-06-27 19:50:43,423 INFO L495 AbstractCegarLoop]: Abstraction has has 112 places, 125 transitions, 1159 flow [2024-06-27 19:50:43,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:43,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:43,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:43,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-27 19:50:43,423 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)] === [2024-06-27 19:50:43,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:43,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1697014894, now seen corresponding path program 3 times [2024-06-27 19:50:43,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:43,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141527106] [2024-06-27 19:50:43,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:43,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:44,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:44,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:44,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141527106] [2024-06-27 19:50:44,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141527106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:44,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:44,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:44,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305870265] [2024-06-27 19:50:44,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:44,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:44,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:44,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:44,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:44,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:44,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 125 transitions, 1159 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:44,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:44,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:44,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:44,865 INFO L124 PetriNetUnfolderBase]: 2212/3409 cut-off events. [2024-06-27 19:50:44,865 INFO L125 PetriNetUnfolderBase]: For 99779/99781 co-relation queries the response was YES. [2024-06-27 19:50:44,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20875 conditions, 3409 events. 2212/3409 cut-off events. For 99779/99781 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 17252 event pairs, 660 based on Foata normal form. 6/3410 useless extension candidates. Maximal degree in co-relation 20827. Up to 3117 conditions per place. [2024-06-27 19:50:44,890 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 121 selfloop transitions, 24 changer transitions 0/152 dead transitions. [2024-06-27 19:50:44,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 152 transitions, 1517 flow [2024-06-27 19:50:44,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:44,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:44,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-27 19:50:44,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-27 19:50:44,916 INFO L175 Difference]: Start difference. First operand has 112 places, 125 transitions, 1159 flow. Second operand 8 states and 154 transitions. [2024-06-27 19:50:44,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 152 transitions, 1517 flow [2024-06-27 19:50:44,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 152 transitions, 1376 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:44,997 INFO L231 Difference]: Finished difference. Result has 115 places, 125 transitions, 1073 flow [2024-06-27 19:50:44,997 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1018, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1073, PETRI_PLACES=115, PETRI_TRANSITIONS=125} [2024-06-27 19:50:44,997 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-27 19:50:44,998 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 125 transitions, 1073 flow [2024-06-27 19:50:44,998 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:44,998 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:44,998 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:44,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-27 19:50:44,998 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:45,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:45,016 INFO L85 PathProgramCache]: Analyzing trace with hash -2111944666, now seen corresponding path program 4 times [2024-06-27 19:50:45,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:45,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253559980] [2024-06-27 19:50:45,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:45,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:45,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:45,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:45,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:45,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253559980] [2024-06-27 19:50:45,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253559980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:45,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:45,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:50:45,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1396192061] [2024-06-27 19:50:45,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:45,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:50:45,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:45,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:50:45,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:50:46,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:46,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 125 transitions, 1073 flow. Second operand has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:46,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:46,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:46,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:46,647 INFO L124 PetriNetUnfolderBase]: 2250/3463 cut-off events. [2024-06-27 19:50:46,647 INFO L125 PetriNetUnfolderBase]: For 107335/107335 co-relation queries the response was YES. [2024-06-27 19:50:46,658 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21281 conditions, 3463 events. 2250/3463 cut-off events. For 107335/107335 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17481 event pairs, 612 based on Foata normal form. 4/3465 useless extension candidates. Maximal degree in co-relation 21232. Up to 2925 conditions per place. [2024-06-27 19:50:46,671 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 113 selfloop transitions, 54 changer transitions 0/174 dead transitions. [2024-06-27 19:50:46,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 174 transitions, 1715 flow [2024-06-27 19:50:46,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:50:46,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:50:46,672 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-27 19:50:46,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-27 19:50:46,673 INFO L175 Difference]: Start difference. First operand has 115 places, 125 transitions, 1073 flow. Second operand 9 states and 189 transitions. [2024-06-27 19:50:46,673 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 174 transitions, 1715 flow [2024-06-27 19:50:46,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 174 transitions, 1631 flow, removed 4 selfloop flow, removed 9 redundant places. [2024-06-27 19:50:46,753 INFO L231 Difference]: Finished difference. Result has 115 places, 131 transitions, 1204 flow [2024-06-27 19:50:46,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=989, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1204, PETRI_PLACES=115, PETRI_TRANSITIONS=131} [2024-06-27 19:50:46,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-27 19:50:46,753 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 131 transitions, 1204 flow [2024-06-27 19:50:46,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 11.444444444444445) internal successors, (103), 9 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:46,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:46,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:46,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-27 19:50:46,754 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)] === [2024-06-27 19:50:46,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:46,754 INFO L85 PathProgramCache]: Analyzing trace with hash -2111767036, now seen corresponding path program 5 times [2024-06-27 19:50:46,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:46,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261663134] [2024-06-27 19:50:46,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:46,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:46,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:47,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:47,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:47,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261663134] [2024-06-27 19:50:47,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261663134] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:47,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:47,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:50:47,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734400983] [2024-06-27 19:50:47,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:47,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:50:47,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:47,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:50:47,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:50:47,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:47,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 131 transitions, 1204 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:47,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:47,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:47,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:48,388 INFO L124 PetriNetUnfolderBase]: 2272/3496 cut-off events. [2024-06-27 19:50:48,388 INFO L125 PetriNetUnfolderBase]: For 115316/115316 co-relation queries the response was YES. [2024-06-27 19:50:48,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21933 conditions, 3496 events. 2272/3496 cut-off events. For 115316/115316 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 17742 event pairs, 624 based on Foata normal form. 4/3498 useless extension candidates. Maximal degree in co-relation 21883. Up to 3002 conditions per place. [2024-06-27 19:50:48,411 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 115 selfloop transitions, 49 changer transitions 0/171 dead transitions. [2024-06-27 19:50:48,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 171 transitions, 1796 flow [2024-06-27 19:50:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:50:48,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:50:48,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 181 transitions. [2024-06-27 19:50:48,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47883597883597884 [2024-06-27 19:50:48,413 INFO L175 Difference]: Start difference. First operand has 115 places, 131 transitions, 1204 flow. Second operand 9 states and 181 transitions. [2024-06-27 19:50:48,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 171 transitions, 1796 flow [2024-06-27 19:50:48,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 171 transitions, 1705 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:48,499 INFO L231 Difference]: Finished difference. Result has 119 places, 134 transitions, 1277 flow [2024-06-27 19:50:48,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1113, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1277, PETRI_PLACES=119, PETRI_TRANSITIONS=134} [2024-06-27 19:50:48,499 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 76 predicate places. [2024-06-27 19:50:48,499 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 134 transitions, 1277 flow [2024-06-27 19:50:48,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:48,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:48,500 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:48,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-27 19:50:48,500 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:48,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:48,501 INFO L85 PathProgramCache]: Analyzing trace with hash -174605455, now seen corresponding path program 1 times [2024-06-27 19:50:48,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:48,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692529791] [2024-06-27 19:50:48,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:48,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:48,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:49,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:49,037 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:49,037 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692529791] [2024-06-27 19:50:49,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692529791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:49,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:49,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:49,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590400711] [2024-06-27 19:50:49,038 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:49,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:49,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:49,038 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:49,038 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:49,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:50:49,112 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 134 transitions, 1277 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 19:50:49,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:49,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:50:49,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:49,547 INFO L124 PetriNetUnfolderBase]: 2511/3772 cut-off events. [2024-06-27 19:50:49,547 INFO L125 PetriNetUnfolderBase]: For 124298/124298 co-relation queries the response was YES. [2024-06-27 19:50:49,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23715 conditions, 3772 events. 2511/3772 cut-off events. For 124298/124298 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 18122 event pairs, 797 based on Foata normal form. 1/3773 useless extension candidates. Maximal degree in co-relation 23663. Up to 3634 conditions per place. [2024-06-27 19:50:49,574 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 125 selfloop transitions, 16 changer transitions 0/156 dead transitions. [2024-06-27 19:50:49,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 156 transitions, 1719 flow [2024-06-27 19:50:49,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:49,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-27 19:50:49,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-27 19:50:49,575 INFO L175 Difference]: Start difference. First operand has 119 places, 134 transitions, 1277 flow. Second operand 6 states and 110 transitions. [2024-06-27 19:50:49,576 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 156 transitions, 1719 flow [2024-06-27 19:50:49,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 156 transitions, 1587 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-27 19:50:49,677 INFO L231 Difference]: Finished difference. Result has 118 places, 140 transitions, 1253 flow [2024-06-27 19:50:49,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1145, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1253, PETRI_PLACES=118, PETRI_TRANSITIONS=140} [2024-06-27 19:50:49,678 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 75 predicate places. [2024-06-27 19:50:49,678 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 140 transitions, 1253 flow [2024-06-27 19:50:49,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 19:50:49,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:49,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:49,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-27 19:50:49,679 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)] === [2024-06-27 19:50:49,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:49,679 INFO L85 PathProgramCache]: Analyzing trace with hash -1946127902, now seen corresponding path program 6 times [2024-06-27 19:50:49,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:49,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83690218] [2024-06-27 19:50:49,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:49,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:49,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:50,523 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:50,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:50,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83690218] [2024-06-27 19:50:50,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83690218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:50,524 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:50,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:50:50,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116726544] [2024-06-27 19:50:50,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:50,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:50:50,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:50,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:50:50,525 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:50:50,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:50,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 140 transitions, 1253 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:50,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:50,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:50,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:51,242 INFO L124 PetriNetUnfolderBase]: 2315/3550 cut-off events. [2024-06-27 19:50:51,242 INFO L125 PetriNetUnfolderBase]: For 131710/131710 co-relation queries the response was YES. [2024-06-27 19:50:51,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23036 conditions, 3550 events. 2315/3550 cut-off events. For 131710/131710 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17942 event pairs, 657 based on Foata normal form. 4/3549 useless extension candidates. Maximal degree in co-relation 22983. Up to 3228 conditions per place. [2024-06-27 19:50:51,263 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 138 selfloop transitions, 32 changer transitions 0/179 dead transitions. [2024-06-27 19:50:51,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 179 transitions, 1897 flow [2024-06-27 19:50:51,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:50:51,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:50:51,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-27 19:50:51,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-27 19:50:51,270 INFO L175 Difference]: Start difference. First operand has 118 places, 140 transitions, 1253 flow. Second operand 9 states and 173 transitions. [2024-06-27 19:50:51,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 179 transitions, 1897 flow [2024-06-27 19:50:51,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 179 transitions, 1863 flow, removed 13 selfloop flow, removed 2 redundant places. [2024-06-27 19:50:51,352 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1422 flow [2024-06-27 19:50:51,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1219, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1422, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-27 19:50:51,353 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 83 predicate places. [2024-06-27 19:50:51,353 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1422 flow [2024-06-27 19:50:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:51,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:51,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:51,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-27 19:50:51,354 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:51,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:51,354 INFO L85 PathProgramCache]: Analyzing trace with hash 2076024806, now seen corresponding path program 7 times [2024-06-27 19:50:51,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:51,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882516207] [2024-06-27 19:50:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:52,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:52,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882516207] [2024-06-27 19:50:52,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882516207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:52,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:52,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:50:52,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797007217] [2024-06-27 19:50:52,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:52,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:50:52,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:52,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:50:52,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:50:52,276 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:52,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1422 flow. Second operand has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:52,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:52,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:52,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:52,879 INFO L124 PetriNetUnfolderBase]: 2313/3550 cut-off events. [2024-06-27 19:50:52,879 INFO L125 PetriNetUnfolderBase]: For 141247/141247 co-relation queries the response was YES. [2024-06-27 19:50:52,893 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23626 conditions, 3550 events. 2313/3550 cut-off events. For 141247/141247 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 17935 event pairs, 616 based on Foata normal form. 6/3549 useless extension candidates. Maximal degree in co-relation 23570. Up to 3251 conditions per place. [2024-06-27 19:50:52,906 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 145 selfloop transitions, 22 changer transitions 0/176 dead transitions. [2024-06-27 19:50:52,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 176 transitions, 1836 flow [2024-06-27 19:50:52,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:50:52,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:50:52,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-27 19:50:52,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-27 19:50:52,908 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1422 flow. Second operand 9 states and 167 transitions. [2024-06-27 19:50:52,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 176 transitions, 1836 flow [2024-06-27 19:50:53,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 176 transitions, 1719 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:50:53,018 INFO L231 Difference]: Finished difference. Result has 129 places, 146 transitions, 1357 flow [2024-06-27 19:50:53,018 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1305, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1357, PETRI_PLACES=129, PETRI_TRANSITIONS=146} [2024-06-27 19:50:53,018 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 19:50:53,018 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 146 transitions, 1357 flow [2024-06-27 19:50:53,019 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.3) internal successors, (113), 10 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:53,019 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:53,019 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:53,019 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-27 19:50:53,019 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:53,019 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:53,020 INFO L85 PathProgramCache]: Analyzing trace with hash 2084602630, now seen corresponding path program 1 times [2024-06-27 19:50:53,020 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:53,020 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948293356] [2024-06-27 19:50:53,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:53,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:53,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:54,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:54,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:54,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948293356] [2024-06-27 19:50:54,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948293356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:54,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:54,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:50:54,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915362628] [2024-06-27 19:50:54,006 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:54,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:50:54,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:54,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:50:54,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:50:54,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:50:54,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 146 transitions, 1357 flow. Second operand has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:54,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:54,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:50:54,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:54,820 INFO L124 PetriNetUnfolderBase]: 2514/3792 cut-off events. [2024-06-27 19:50:54,820 INFO L125 PetriNetUnfolderBase]: For 148940/148940 co-relation queries the response was YES. [2024-06-27 19:50:54,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24830 conditions, 3792 events. 2514/3792 cut-off events. For 148940/148940 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18341 event pairs, 739 based on Foata normal form. 2/3794 useless extension candidates. Maximal degree in co-relation 24773. Up to 3590 conditions per place. [2024-06-27 19:50:54,847 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 144 selfloop transitions, 22 changer transitions 0/173 dead transitions. [2024-06-27 19:50:54,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 173 transitions, 1787 flow [2024-06-27 19:50:54,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:50:54,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:50:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:50:54,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 19:50:54,849 INFO L175 Difference]: Start difference. First operand has 129 places, 146 transitions, 1357 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:50:54,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 173 transitions, 1787 flow [2024-06-27 19:50:54,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 173 transitions, 1684 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-27 19:50:54,964 INFO L231 Difference]: Finished difference. Result has 129 places, 149 transitions, 1352 flow [2024-06-27 19:50:54,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1352, PETRI_PLACES=129, PETRI_TRANSITIONS=149} [2024-06-27 19:50:54,965 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 19:50:54,965 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 149 transitions, 1352 flow [2024-06-27 19:50:54,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.3) internal successors, (103), 10 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:54,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:54,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:54,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-27 19:50:54,966 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:50:54,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:54,966 INFO L85 PathProgramCache]: Analyzing trace with hash 364181675, now seen corresponding path program 2 times [2024-06-27 19:50:54,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:54,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044896662] [2024-06-27 19:50:54,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:54,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:54,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:55,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:55,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:55,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044896662] [2024-06-27 19:50:55,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044896662] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:55,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:55,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:55,536 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187013565] [2024-06-27 19:50:55,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:55,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:55,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:55,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:55,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:55,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:50:55,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 149 transitions, 1352 flow. Second operand has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 19:50:55,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:55,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:50:55,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:56,118 INFO L124 PetriNetUnfolderBase]: 2543/3820 cut-off events. [2024-06-27 19:50:56,119 INFO L125 PetriNetUnfolderBase]: For 154919/154919 co-relation queries the response was YES. [2024-06-27 19:50:56,133 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24812 conditions, 3820 events. 2543/3820 cut-off events. For 154919/154919 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18372 event pairs, 790 based on Foata normal form. 1/3821 useless extension candidates. Maximal degree in co-relation 24754. Up to 3701 conditions per place. [2024-06-27 19:50:56,146 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 132 selfloop transitions, 11 changer transitions 0/158 dead transitions. [2024-06-27 19:50:56,147 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 158 transitions, 1660 flow [2024-06-27 19:50:56,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:56,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:56,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-27 19:50:56,148 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4007936507936508 [2024-06-27 19:50:56,148 INFO L175 Difference]: Start difference. First operand has 129 places, 149 transitions, 1352 flow. Second operand 6 states and 101 transitions. [2024-06-27 19:50:56,148 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 158 transitions, 1660 flow [2024-06-27 19:50:56,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 158 transitions, 1582 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-27 19:50:56,247 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1302 flow [2024-06-27 19:50:56,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1274, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1302, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-27 19:50:56,248 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 85 predicate places. [2024-06-27 19:50:56,248 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1302 flow [2024-06-27 19:50:56,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.857142857142858) internal successors, (76), 7 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) [2024-06-27 19:50:56,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:56,249 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:56,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-27 19:50:56,249 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)] === [2024-06-27 19:50:56,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:56,249 INFO L85 PathProgramCache]: Analyzing trace with hash -1762659651, now seen corresponding path program 1 times [2024-06-27 19:50:56,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:56,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329076271] [2024-06-27 19:50:56,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:56,250 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:56,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:56,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:56,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329076271] [2024-06-27 19:50:56,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329076271] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:56,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:56,695 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:56,695 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566295612] [2024-06-27 19:50:56,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:56,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:56,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:56,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:56,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:56,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:50:56,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1302 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:56,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:56,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:50:56,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:57,360 INFO L124 PetriNetUnfolderBase]: 2680/3959 cut-off events. [2024-06-27 19:50:57,360 INFO L125 PetriNetUnfolderBase]: For 164107/164107 co-relation queries the response was YES. [2024-06-27 19:50:57,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25798 conditions, 3959 events. 2680/3959 cut-off events. For 164107/164107 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18545 event pairs, 805 based on Foata normal form. 1/3960 useless extension candidates. Maximal degree in co-relation 25739. Up to 3928 conditions per place. [2024-06-27 19:50:57,393 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 149 selfloop transitions, 16 changer transitions 0/168 dead transitions. [2024-06-27 19:50:57,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 133 places, 168 transitions, 1794 flow [2024-06-27 19:50:57,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:57,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:57,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-27 19:50:57,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 19:50:57,395 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1302 flow. Second operand 6 states and 102 transitions. [2024-06-27 19:50:57,395 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 133 places, 168 transitions, 1794 flow [2024-06-27 19:50:57,510 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 168 transitions, 1762 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-27 19:50:57,512 INFO L231 Difference]: Finished difference. Result has 129 places, 155 transitions, 1378 flow [2024-06-27 19:50:57,512 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1270, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1378, PETRI_PLACES=129, PETRI_TRANSITIONS=155} [2024-06-27 19:50:57,513 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-27 19:50:57,513 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 155 transitions, 1378 flow [2024-06-27 19:50:57,513 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:57,513 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:57,513 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:57,513 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-27 19:50:57,513 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)] === [2024-06-27 19:50:57,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:57,514 INFO L85 PathProgramCache]: Analyzing trace with hash 382062227, now seen corresponding path program 2 times [2024-06-27 19:50:57,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:57,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519076440] [2024-06-27 19:50:57,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:57,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:57,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:57,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:57,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519076440] [2024-06-27 19:50:57,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519076440] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:57,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:57,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-27 19:50:57,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88661227] [2024-06-27 19:50:57,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:57,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-27 19:50:57,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:57,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-27 19:50:57,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-27 19:50:58,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:50:58,012 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 155 transitions, 1378 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:58,012 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:58,012 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:50:58,012 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:50:58,592 INFO L124 PetriNetUnfolderBase]: 2677/3956 cut-off events. [2024-06-27 19:50:58,592 INFO L125 PetriNetUnfolderBase]: For 173652/173654 co-relation queries the response was YES. [2024-06-27 19:50:58,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26351 conditions, 3956 events. 2677/3956 cut-off events. For 173652/173654 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 18546 event pairs, 808 based on Foata normal form. 3/3959 useless extension candidates. Maximal degree in co-relation 26291. Up to 3925 conditions per place. [2024-06-27 19:50:58,627 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 145 selfloop transitions, 16 changer transitions 0/164 dead transitions. [2024-06-27 19:50:58,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 164 transitions, 1722 flow [2024-06-27 19:50:58,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-27 19:50:58,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-27 19:50:58,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-27 19:50:58,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-27 19:50:58,629 INFO L175 Difference]: Start difference. First operand has 129 places, 155 transitions, 1378 flow. Second operand 6 states and 98 transitions. [2024-06-27 19:50:58,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 164 transitions, 1722 flow [2024-06-27 19:50:58,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 164 transitions, 1666 flow, removed 24 selfloop flow, removed 2 redundant places. [2024-06-27 19:50:58,780 INFO L231 Difference]: Finished difference. Result has 133 places, 155 transitions, 1360 flow [2024-06-27 19:50:58,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1322, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=139, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1360, PETRI_PLACES=133, PETRI_TRANSITIONS=155} [2024-06-27 19:50:58,781 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 90 predicate places. [2024-06-27 19:50:58,781 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 155 transitions, 1360 flow [2024-06-27 19:50:58,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:58,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:50:58,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:50:58,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-27 19:50:58,781 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)] === [2024-06-27 19:50:58,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:50:58,782 INFO L85 PathProgramCache]: Analyzing trace with hash 979289710, now seen corresponding path program 1 times [2024-06-27 19:50:58,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:50:58,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893835613] [2024-06-27 19:50:58,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:50:58,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:50:58,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:50:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:50:59,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:50:59,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893835613] [2024-06-27 19:50:59,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893835613] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:50:59,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:50:59,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:50:59,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384368349] [2024-06-27 19:50:59,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:50:59,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:50:59,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:50:59,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:50:59,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:50:59,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:50:59,765 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 155 transitions, 1360 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:50:59,765 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:50:59,765 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:50:59,765 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:00,453 INFO L124 PetriNetUnfolderBase]: 2593/3980 cut-off events. [2024-06-27 19:51:00,453 INFO L125 PetriNetUnfolderBase]: For 209222/209222 co-relation queries the response was YES. [2024-06-27 19:51:00,468 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27661 conditions, 3980 events. 2593/3980 cut-off events. For 209222/209222 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 20646 event pairs, 404 based on Foata normal form. 16/3972 useless extension candidates. Maximal degree in co-relation 27599. Up to 2663 conditions per place. [2024-06-27 19:51:00,480 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 122 selfloop transitions, 73 changer transitions 0/206 dead transitions. [2024-06-27 19:51:00,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 206 transitions, 2088 flow [2024-06-27 19:51:00,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:00,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-27 19:51:00,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-27 19:51:00,482 INFO L175 Difference]: Start difference. First operand has 133 places, 155 transitions, 1360 flow. Second operand 9 states and 190 transitions. [2024-06-27 19:51:00,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 206 transitions, 2088 flow [2024-06-27 19:51:00,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 206 transitions, 2040 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:00,624 INFO L231 Difference]: Finished difference. Result has 136 places, 157 transitions, 1514 flow [2024-06-27 19:51:00,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1312, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1514, PETRI_PLACES=136, PETRI_TRANSITIONS=157} [2024-06-27 19:51:00,625 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-27 19:51:00,625 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 157 transitions, 1514 flow [2024-06-27 19:51:00,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:00,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:00,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:00,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-27 19:51:00,626 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)] === [2024-06-27 19:51:00,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:00,626 INFO L85 PathProgramCache]: Analyzing trace with hash 981167380, now seen corresponding path program 2 times [2024-06-27 19:51:00,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:00,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115024976] [2024-06-27 19:51:00,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:00,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:00,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:01,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:01,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:01,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115024976] [2024-06-27 19:51:01,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115024976] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:01,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:01,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:51:01,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631237409] [2024-06-27 19:51:01,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:01,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:51:01,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:01,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:51:01,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:51:01,602 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:51:01,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 157 transitions, 1514 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:01,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:01,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:51:01,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:02,527 INFO L124 PetriNetUnfolderBase]: 2672/4121 cut-off events. [2024-06-27 19:51:02,527 INFO L125 PetriNetUnfolderBase]: For 226329/226329 co-relation queries the response was YES. [2024-06-27 19:51:02,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28952 conditions, 4121 events. 2672/4121 cut-off events. For 226329/226329 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 21731 event pairs, 638 based on Foata normal form. 28/4134 useless extension candidates. Maximal degree in co-relation 28890. Up to 3232 conditions per place. [2024-06-27 19:51:02,560 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 124 selfloop transitions, 75 changer transitions 0/210 dead transitions. [2024-06-27 19:51:02,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 210 transitions, 2106 flow [2024-06-27 19:51:02,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:51:02,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:51:02,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-27 19:51:02,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-27 19:51:02,562 INFO L175 Difference]: Start difference. First operand has 136 places, 157 transitions, 1514 flow. Second operand 11 states and 222 transitions. [2024-06-27 19:51:02,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 210 transitions, 2106 flow [2024-06-27 19:51:02,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 210 transitions, 2010 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-27 19:51:02,752 INFO L231 Difference]: Finished difference. Result has 142 places, 159 transitions, 1627 flow [2024-06-27 19:51:02,752 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1418, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1627, PETRI_PLACES=142, PETRI_TRANSITIONS=159} [2024-06-27 19:51:02,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 99 predicate places. [2024-06-27 19:51:02,753 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 159 transitions, 1627 flow [2024-06-27 19:51:02,753 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:02,753 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:02,753 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:02,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-27 19:51:02,753 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)] === [2024-06-27 19:51:02,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:02,754 INFO L85 PathProgramCache]: Analyzing trace with hash 981163660, now seen corresponding path program 3 times [2024-06-27 19:51:02,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:02,754 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626908248] [2024-06-27 19:51:02,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:02,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:02,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:03,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:03,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:03,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626908248] [2024-06-27 19:51:03,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626908248] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:03,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:03,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:51:03,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662772378] [2024-06-27 19:51:03,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:03,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:51:03,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:03,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:51:03,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:51:03,724 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:51:03,724 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 159 transitions, 1627 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:03,725 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:03,725 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:51:03,725 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:04,526 INFO L124 PetriNetUnfolderBase]: 2730/4229 cut-off events. [2024-06-27 19:51:04,526 INFO L125 PetriNetUnfolderBase]: For 234380/234380 co-relation queries the response was YES. [2024-06-27 19:51:04,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30201 conditions, 4229 events. 2730/4229 cut-off events. For 234380/234380 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 22556 event pairs, 638 based on Foata normal form. 16/4230 useless extension candidates. Maximal degree in co-relation 30137. Up to 3192 conditions per place. [2024-06-27 19:51:04,561 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 123 selfloop transitions, 77 changer transitions 0/211 dead transitions. [2024-06-27 19:51:04,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 211 transitions, 2213 flow [2024-06-27 19:51:04,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:04,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:04,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 209 transitions. [2024-06-27 19:51:04,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4976190476190476 [2024-06-27 19:51:04,563 INFO L175 Difference]: Start difference. First operand has 142 places, 159 transitions, 1627 flow. Second operand 10 states and 209 transitions. [2024-06-27 19:51:04,563 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 211 transitions, 2213 flow [2024-06-27 19:51:04,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 211 transitions, 2048 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-27 19:51:04,799 INFO L231 Difference]: Finished difference. Result has 143 places, 160 transitions, 1653 flow [2024-06-27 19:51:04,799 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1462, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=159, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1653, PETRI_PLACES=143, PETRI_TRANSITIONS=160} [2024-06-27 19:51:04,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 19:51:04,800 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 160 transitions, 1653 flow [2024-06-27 19:51:04,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:04,800 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:04,800 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:04,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-27 19:51:04,800 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)] === [2024-06-27 19:51:04,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:04,801 INFO L85 PathProgramCache]: Analyzing trace with hash -646172519, now seen corresponding path program 1 times [2024-06-27 19:51:04,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:04,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781787191] [2024-06-27 19:51:04,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:04,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:04,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:05,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:05,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:05,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781787191] [2024-06-27 19:51:05,441 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781787191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:05,441 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:05,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:05,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143133431] [2024-06-27 19:51:05,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:05,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:05,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:05,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:05,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:05,491 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:05,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 160 transitions, 1653 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:05,492 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:05,492 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:05,492 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:06,088 INFO L124 PetriNetUnfolderBase]: 3107/4657 cut-off events. [2024-06-27 19:51:06,089 INFO L125 PetriNetUnfolderBase]: For 238461/238463 co-relation queries the response was YES. [2024-06-27 19:51:06,109 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32564 conditions, 4657 events. 3107/4657 cut-off events. For 238461/238463 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 23236 event pairs, 927 based on Foata normal form. 4/4661 useless extension candidates. Maximal degree in co-relation 32499. Up to 4509 conditions per place. [2024-06-27 19:51:06,126 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 154 selfloop transitions, 39 changer transitions 0/196 dead transitions. [2024-06-27 19:51:06,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 196 transitions, 2395 flow [2024-06-27 19:51:06,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:06,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:06,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-27 19:51:06,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-27 19:51:06,127 INFO L175 Difference]: Start difference. First operand has 143 places, 160 transitions, 1653 flow. Second operand 7 states and 130 transitions. [2024-06-27 19:51:06,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 196 transitions, 2395 flow [2024-06-27 19:51:06,291 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 196 transitions, 2226 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:06,294 INFO L231 Difference]: Finished difference. Result has 143 places, 172 transitions, 1745 flow [2024-06-27 19:51:06,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1484, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1745, PETRI_PLACES=143, PETRI_TRANSITIONS=172} [2024-06-27 19:51:06,294 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-27 19:51:06,294 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 172 transitions, 1745 flow [2024-06-27 19:51:06,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:06,295 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:06,295 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:06,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-27 19:51:06,295 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)] === [2024-06-27 19:51:06,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:06,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1045777742, now seen corresponding path program 4 times [2024-06-27 19:51:06,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:06,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098750148] [2024-06-27 19:51:06,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:06,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:06,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:07,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:07,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098750148] [2024-06-27 19:51:07,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098750148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:07,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:07,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:51:07,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482459208] [2024-06-27 19:51:07,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:07,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:51:07,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:07,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:51:07,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:51:07,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:51:07,337 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 172 transitions, 1745 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:07,337 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:07,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:51:07,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:08,170 INFO L124 PetriNetUnfolderBase]: 2921/4541 cut-off events. [2024-06-27 19:51:08,170 INFO L125 PetriNetUnfolderBase]: For 272039/272039 co-relation queries the response was YES. [2024-06-27 19:51:08,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33145 conditions, 4541 events. 2921/4541 cut-off events. For 272039/272039 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 24680 event pairs, 559 based on Foata normal form. 16/4555 useless extension candidates. Maximal degree in co-relation 33078. Up to 3456 conditions per place. [2024-06-27 19:51:08,211 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 145 selfloop transitions, 66 changer transitions 0/225 dead transitions. [2024-06-27 19:51:08,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 225 transitions, 2527 flow [2024-06-27 19:51:08,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:08,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:08,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 195 transitions. [2024-06-27 19:51:08,212 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5158730158730159 [2024-06-27 19:51:08,213 INFO L175 Difference]: Start difference. First operand has 143 places, 172 transitions, 1745 flow. Second operand 9 states and 195 transitions. [2024-06-27 19:51:08,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 225 transitions, 2527 flow [2024-06-27 19:51:08,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 225 transitions, 2459 flow, removed 27 selfloop flow, removed 2 redundant places. [2024-06-27 19:51:08,515 INFO L231 Difference]: Finished difference. Result has 150 places, 174 transitions, 1877 flow [2024-06-27 19:51:08,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1677, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1877, PETRI_PLACES=150, PETRI_TRANSITIONS=174} [2024-06-27 19:51:08,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 107 predicate places. [2024-06-27 19:51:08,516 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 174 transitions, 1877 flow [2024-06-27 19:51:08,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:08,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:08,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:08,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-27 19:51:08,516 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)] === [2024-06-27 19:51:08,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:08,517 INFO L85 PathProgramCache]: Analyzing trace with hash -1045774022, now seen corresponding path program 5 times [2024-06-27 19:51:08,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:08,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001437088] [2024-06-27 19:51:08,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:08,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:08,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:09,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:09,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:09,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001437088] [2024-06-27 19:51:09,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001437088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:09,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:09,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:51:09,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350947532] [2024-06-27 19:51:09,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:09,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:51:09,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:09,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:51:09,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:51:09,603 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:51:09,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 174 transitions, 1877 flow. Second operand has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:09,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:09,603 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:51:09,603 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:10,536 INFO L124 PetriNetUnfolderBase]: 3010/4690 cut-off events. [2024-06-27 19:51:10,536 INFO L125 PetriNetUnfolderBase]: For 293409/293409 co-relation queries the response was YES. [2024-06-27 19:51:10,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34534 conditions, 4690 events. 3010/4690 cut-off events. For 293409/293409 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 25845 event pairs, 727 based on Foata normal form. 24/4712 useless extension candidates. Maximal degree in co-relation 34465. Up to 3899 conditions per place. [2024-06-27 19:51:10,572 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 148 selfloop transitions, 64 changer transitions 0/226 dead transitions. [2024-06-27 19:51:10,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 226 transitions, 2489 flow [2024-06-27 19:51:10,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:10,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:10,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 208 transitions. [2024-06-27 19:51:10,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49523809523809526 [2024-06-27 19:51:10,574 INFO L175 Difference]: Start difference. First operand has 150 places, 174 transitions, 1877 flow. Second operand 10 states and 208 transitions. [2024-06-27 19:51:10,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 226 transitions, 2489 flow [2024-06-27 19:51:10,771 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 226 transitions, 2390 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-27 19:51:10,774 INFO L231 Difference]: Finished difference. Result has 155 places, 175 transitions, 1948 flow [2024-06-27 19:51:10,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1778, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1948, PETRI_PLACES=155, PETRI_TRANSITIONS=175} [2024-06-27 19:51:10,774 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-27 19:51:10,774 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 175 transitions, 1948 flow [2024-06-27 19:51:10,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 11.4) internal successors, (114), 10 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:10,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:10,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:10,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-27 19:51:10,775 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)] === [2024-06-27 19:51:10,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:10,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1040267492, now seen corresponding path program 6 times [2024-06-27 19:51:10,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:10,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73757354] [2024-06-27 19:51:10,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:10,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:10,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:11,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:11,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:11,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73757354] [2024-06-27 19:51:11,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73757354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:11,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:11,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:11,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480379190] [2024-06-27 19:51:11,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:11,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:11,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:11,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:11,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:11,944 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:51:11,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 175 transitions, 1948 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 19:51:11,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:11,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:51:11,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:12,907 INFO L124 PetriNetUnfolderBase]: 3102/4842 cut-off events. [2024-06-27 19:51:12,907 INFO L125 PetriNetUnfolderBase]: For 309024/309024 co-relation queries the response was YES. [2024-06-27 19:51:12,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35849 conditions, 4842 events. 3102/4842 cut-off events. For 309024/309024 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27043 event pairs, 757 based on Foata normal form. 24/4864 useless extension candidates. Maximal degree in co-relation 35778. Up to 4163 conditions per place. [2024-06-27 19:51:12,956 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 159 selfloop transitions, 47 changer transitions 0/220 dead transitions. [2024-06-27 19:51:12,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 220 transitions, 2530 flow [2024-06-27 19:51:12,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:12,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2024-06-27 19:51:12,957 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738095238095238 [2024-06-27 19:51:12,957 INFO L175 Difference]: Start difference. First operand has 155 places, 175 transitions, 1948 flow. Second operand 10 states and 199 transitions. [2024-06-27 19:51:12,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 220 transitions, 2530 flow [2024-06-27 19:51:13,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 220 transitions, 2392 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:13,171 INFO L231 Difference]: Finished difference. Result has 157 places, 176 transitions, 1948 flow [2024-06-27 19:51:13,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1810, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=175, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1948, PETRI_PLACES=157, PETRI_TRANSITIONS=176} [2024-06-27 19:51:13,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 19:51:13,172 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 176 transitions, 1948 flow [2024-06-27 19:51:13,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 19:51:13,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:13,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:13,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-27 19:51:13,172 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)] === [2024-06-27 19:51:13,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:13,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1117801137, now seen corresponding path program 2 times [2024-06-27 19:51:13,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:13,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275872556] [2024-06-27 19:51:13,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:13,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:13,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:13,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275872556] [2024-06-27 19:51:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275872556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:13,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:13,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891470272] [2024-06-27 19:51:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:13,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:13,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:13,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:13,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:13,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:13,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 176 transitions, 1948 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:13,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:13,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:13,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:14,573 INFO L124 PetriNetUnfolderBase]: 3514/5321 cut-off events. [2024-06-27 19:51:14,574 INFO L125 PetriNetUnfolderBase]: For 307343/307345 co-relation queries the response was YES. [2024-06-27 19:51:14,600 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38313 conditions, 5321 events. 3514/5321 cut-off events. For 307343/307345 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 27973 event pairs, 1059 based on Foata normal form. 4/5325 useless extension candidates. Maximal degree in co-relation 38241. Up to 5162 conditions per place. [2024-06-27 19:51:14,619 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 157 selfloop transitions, 42 changer transitions 0/202 dead transitions. [2024-06-27 19:51:14,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 202 transitions, 2663 flow [2024-06-27 19:51:14,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:14,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:14,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 19:51:14,620 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 19:51:14,620 INFO L175 Difference]: Start difference. First operand has 157 places, 176 transitions, 1948 flow. Second operand 7 states and 124 transitions. [2024-06-27 19:51:14,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 202 transitions, 2663 flow [2024-06-27 19:51:14,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 202 transitions, 2557 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:14,899 INFO L231 Difference]: Finished difference. Result has 157 places, 184 transitions, 2057 flow [2024-06-27 19:51:14,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1842, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2057, PETRI_PLACES=157, PETRI_TRANSITIONS=184} [2024-06-27 19:51:14,900 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-27 19:51:14,900 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 184 transitions, 2057 flow [2024-06-27 19:51:14,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:14,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:14,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:14,901 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-27 19:51:14,901 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)] === [2024-06-27 19:51:14,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:14,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1117800734, now seen corresponding path program 1 times [2024-06-27 19:51:14,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:14,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781413201] [2024-06-27 19:51:14,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:14,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:14,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:15,502 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:15,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:15,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781413201] [2024-06-27 19:51:15,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781413201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:15,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:15,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:15,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951899378] [2024-06-27 19:51:15,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:15,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:15,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:15,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:15,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:15,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:15,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 184 transitions, 2057 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:15,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:15,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:15,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:16,253 INFO L124 PetriNetUnfolderBase]: 3409/5217 cut-off events. [2024-06-27 19:51:16,253 INFO L125 PetriNetUnfolderBase]: For 318870/318870 co-relation queries the response was YES. [2024-06-27 19:51:16,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37754 conditions, 5217 events. 3409/5217 cut-off events. For 318870/318870 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 27922 event pairs, 1043 based on Foata normal form. 3/5206 useless extension candidates. Maximal degree in co-relation 37680. Up to 5025 conditions per place. [2024-06-27 19:51:16,420 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 169 selfloop transitions, 23 changer transitions 0/214 dead transitions. [2024-06-27 19:51:16,420 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 214 transitions, 2671 flow [2024-06-27 19:51:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:16,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:16,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-27 19:51:16,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-27 19:51:16,421 INFO L175 Difference]: Start difference. First operand has 157 places, 184 transitions, 2057 flow. Second operand 7 states and 129 transitions. [2024-06-27 19:51:16,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 214 transitions, 2671 flow [2024-06-27 19:51:16,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 214 transitions, 2582 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-27 19:51:16,719 INFO L231 Difference]: Finished difference. Result has 162 places, 193 transitions, 2134 flow [2024-06-27 19:51:16,719 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2134, PETRI_PLACES=162, PETRI_TRANSITIONS=193} [2024-06-27 19:51:16,719 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 119 predicate places. [2024-06-27 19:51:16,720 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 193 transitions, 2134 flow [2024-06-27 19:51:16,720 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:16,720 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:16,720 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:16,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-27 19:51:16,721 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)] === [2024-06-27 19:51:16,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:16,721 INFO L85 PathProgramCache]: Analyzing trace with hash -1237054289, now seen corresponding path program 1 times [2024-06-27 19:51:16,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:16,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553462044] [2024-06-27 19:51:16,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:16,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:16,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:17,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:17,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553462044] [2024-06-27 19:51:17,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553462044] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:17,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:17,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:17,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785161090] [2024-06-27 19:51:17,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:17,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:17,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 193 transitions, 2134 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:17,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:17,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:17,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:18,812 INFO L124 PetriNetUnfolderBase]: 3443/5271 cut-off events. [2024-06-27 19:51:18,812 INFO L125 PetriNetUnfolderBase]: For 337546/337546 co-relation queries the response was YES. [2024-06-27 19:51:18,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39088 conditions, 5271 events. 3443/5271 cut-off events. For 337546/337546 co-relation queries the response was YES. Maximal size of possible extension queue 231. Compared 28237 event pairs, 986 based on Foata normal form. 4/5275 useless extension candidates. Maximal degree in co-relation 39012. Up to 4988 conditions per place. [2024-06-27 19:51:18,867 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 186 selfloop transitions, 29 changer transitions 0/229 dead transitions. [2024-06-27 19:51:18,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 229 transitions, 2719 flow [2024-06-27 19:51:18,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:18,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:18,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 19:51:18,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 19:51:18,870 INFO L175 Difference]: Start difference. First operand has 162 places, 193 transitions, 2134 flow. Second operand 9 states and 162 transitions. [2024-06-27 19:51:18,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 229 transitions, 2719 flow [2024-06-27 19:51:19,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 229 transitions, 2675 flow, removed 19 selfloop flow, removed 2 redundant places. [2024-06-27 19:51:19,247 INFO L231 Difference]: Finished difference. Result has 170 places, 198 transitions, 2238 flow [2024-06-27 19:51:19,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2090, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2238, PETRI_PLACES=170, PETRI_TRANSITIONS=198} [2024-06-27 19:51:19,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-27 19:51:19,248 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 198 transitions, 2238 flow [2024-06-27 19:51:19,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:19,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:19,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:19,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-27 19:51:19,248 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:19,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:19,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1457259672, now seen corresponding path program 7 times [2024-06-27 19:51:19,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:19,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [302932815] [2024-06-27 19:51:19,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:19,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:19,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:20,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:20,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:20,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [302932815] [2024-06-27 19:51:20,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [302932815] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:20,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:20,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:20,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317440089] [2024-06-27 19:51:20,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:20,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:20,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:20,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:20,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:20,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:51:20,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 198 transitions, 2238 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 19:51:20,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:20,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:51:20,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:21,272 INFO L124 PetriNetUnfolderBase]: 3276/5114 cut-off events. [2024-06-27 19:51:21,272 INFO L125 PetriNetUnfolderBase]: For 371271/371271 co-relation queries the response was YES. [2024-06-27 19:51:21,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39152 conditions, 5114 events. 3276/5114 cut-off events. For 371271/371271 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 28754 event pairs, 828 based on Foata normal form. 24/5133 useless extension candidates. Maximal degree in co-relation 39072. Up to 4595 conditions per place. [2024-06-27 19:51:21,321 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 190 selfloop transitions, 33 changer transitions 0/240 dead transitions. [2024-06-27 19:51:21,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 240 transitions, 2848 flow [2024-06-27 19:51:21,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:21,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:21,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 191 transitions. [2024-06-27 19:51:21,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45476190476190476 [2024-06-27 19:51:21,323 INFO L175 Difference]: Start difference. First operand has 170 places, 198 transitions, 2238 flow. Second operand 10 states and 191 transitions. [2024-06-27 19:51:21,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 240 transitions, 2848 flow [2024-06-27 19:51:21,722 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 2747 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:21,725 INFO L231 Difference]: Finished difference. Result has 174 places, 199 transitions, 2249 flow [2024-06-27 19:51:21,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2137, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2249, PETRI_PLACES=174, PETRI_TRANSITIONS=199} [2024-06-27 19:51:21,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 131 predicate places. [2024-06-27 19:51:21,725 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 199 transitions, 2249 flow [2024-06-27 19:51:21,726 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 19:51:21,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:21,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:21,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-27 19:51:21,726 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:21,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:21,726 INFO L85 PathProgramCache]: Analyzing trace with hash -6266743, now seen corresponding path program 2 times [2024-06-27 19:51:21,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:21,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175259734] [2024-06-27 19:51:21,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:21,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:21,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:22,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:22,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:22,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175259734] [2024-06-27 19:51:22,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175259734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:22,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:22,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:22,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763214353] [2024-06-27 19:51:22,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:22,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:22,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:22,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:22,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:22,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:22,751 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 199 transitions, 2249 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:22,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:22,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:22,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:23,663 INFO L124 PetriNetUnfolderBase]: 3569/5477 cut-off events. [2024-06-27 19:51:23,663 INFO L125 PetriNetUnfolderBase]: For 372680/372680 co-relation queries the response was YES. [2024-06-27 19:51:23,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41420 conditions, 5477 events. 3569/5477 cut-off events. For 372680/372680 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29707 event pairs, 1016 based on Foata normal form. 4/5481 useless extension candidates. Maximal degree in co-relation 41339. Up to 5230 conditions per place. [2024-06-27 19:51:23,714 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 24 changer transitions 0/234 dead transitions. [2024-06-27 19:51:23,714 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 234 transitions, 2856 flow [2024-06-27 19:51:23,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:23,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:23,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 19:51:23,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 19:51:23,720 INFO L175 Difference]: Start difference. First operand has 174 places, 199 transitions, 2249 flow. Second operand 9 states and 160 transitions. [2024-06-27 19:51:23,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 234 transitions, 2856 flow [2024-06-27 19:51:24,221 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 234 transitions, 2772 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:24,224 INFO L231 Difference]: Finished difference. Result has 176 places, 204 transitions, 2323 flow [2024-06-27 19:51:24,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2169, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2323, PETRI_PLACES=176, PETRI_TRANSITIONS=204} [2024-06-27 19:51:24,224 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 133 predicate places. [2024-06-27 19:51:24,224 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 204 transitions, 2323 flow [2024-06-27 19:51:24,225 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:24,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:24,225 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:24,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-27 19:51:24,228 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:24,228 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:24,228 INFO L85 PathProgramCache]: Analyzing trace with hash -67739270, now seen corresponding path program 8 times [2024-06-27 19:51:24,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:24,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5727145] [2024-06-27 19:51:24,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:24,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:25,133 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:25,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:25,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5727145] [2024-06-27 19:51:25,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5727145] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:25,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:25,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:25,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524765419] [2024-06-27 19:51:25,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:25,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:25,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:25,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:25,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:25,334 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-27 19:51:25,334 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 204 transitions, 2323 flow. Second operand has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 19:51:25,334 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:25,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-27 19:51:25,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:26,332 INFO L124 PetriNetUnfolderBase]: 3221/5026 cut-off events. [2024-06-27 19:51:26,332 INFO L125 PetriNetUnfolderBase]: For 375795/375795 co-relation queries the response was YES. [2024-06-27 19:51:26,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38177 conditions, 5026 events. 3221/5026 cut-off events. For 375795/375795 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 28111 event pairs, 845 based on Foata normal form. 24/5045 useless extension candidates. Maximal degree in co-relation 38094. Up to 4523 conditions per place. [2024-06-27 19:51:26,378 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 198 selfloop transitions, 28 changer transitions 0/244 dead transitions. [2024-06-27 19:51:26,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 244 transitions, 2899 flow [2024-06-27 19:51:26,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:51:26,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:51:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 19:51:26,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 19:51:26,380 INFO L175 Difference]: Start difference. First operand has 176 places, 204 transitions, 2323 flow. Second operand 10 states and 188 transitions. [2024-06-27 19:51:26,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 244 transitions, 2899 flow [2024-06-27 19:51:26,811 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 244 transitions, 2786 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:26,814 INFO L231 Difference]: Finished difference. Result has 180 places, 204 transitions, 2274 flow [2024-06-27 19:51:26,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2210, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2274, PETRI_PLACES=180, PETRI_TRANSITIONS=204} [2024-06-27 19:51:26,814 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 19:51:26,814 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 204 transitions, 2274 flow [2024-06-27 19:51:26,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.272727272727273) internal successors, (124), 11 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) [2024-06-27 19:51:26,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:26,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:26,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-27 19:51:26,815 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:26,815 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:26,816 INFO L85 PathProgramCache]: Analyzing trace with hash -60373949, now seen corresponding path program 3 times [2024-06-27 19:51:26,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:26,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456127201] [2024-06-27 19:51:26,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:26,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:26,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:27,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:27,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456127201] [2024-06-27 19:51:27,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456127201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:27,655 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:27,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:27,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953371777] [2024-06-27 19:51:27,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:27,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:27,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:27,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:27,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:27,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:27,760 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 204 transitions, 2274 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:27,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:27,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:27,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:28,737 INFO L124 PetriNetUnfolderBase]: 3509/5385 cut-off events. [2024-06-27 19:51:28,737 INFO L125 PetriNetUnfolderBase]: For 367675/367675 co-relation queries the response was YES. [2024-06-27 19:51:28,770 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40029 conditions, 5385 events. 3509/5385 cut-off events. For 367675/367675 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 29094 event pairs, 969 based on Foata normal form. 4/5389 useless extension candidates. Maximal degree in co-relation 39945. Up to 5165 conditions per place. [2024-06-27 19:51:28,791 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 19 changer transitions 0/235 dead transitions. [2024-06-27 19:51:28,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 235 transitions, 2850 flow [2024-06-27 19:51:28,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:28,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 19:51:28,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 19:51:28,793 INFO L175 Difference]: Start difference. First operand has 180 places, 204 transitions, 2274 flow. Second operand 9 states and 157 transitions. [2024-06-27 19:51:28,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 235 transitions, 2850 flow [2024-06-27 19:51:29,274 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 235 transitions, 2768 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:51:29,277 INFO L231 Difference]: Finished difference. Result has 180 places, 206 transitions, 2301 flow [2024-06-27 19:51:29,277 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2192, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2301, PETRI_PLACES=180, PETRI_TRANSITIONS=206} [2024-06-27 19:51:29,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-27 19:51:29,277 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 206 transitions, 2301 flow [2024-06-27 19:51:29,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:29,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:29,278 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:29,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-27 19:51:29,278 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:29,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:29,278 INFO L85 PathProgramCache]: Analyzing trace with hash 198499921, now seen corresponding path program 4 times [2024-06-27 19:51:29,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:29,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460518106] [2024-06-27 19:51:29,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:29,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:29,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:30,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:30,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:30,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460518106] [2024-06-27 19:51:30,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460518106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:30,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:30,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:30,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630901311] [2024-06-27 19:51:30,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:30,219 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:30,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:30,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:30,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:30,338 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:30,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 206 transitions, 2301 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:30,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:30,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:30,339 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:31,311 INFO L124 PetriNetUnfolderBase]: 3526/5412 cut-off events. [2024-06-27 19:51:31,311 INFO L125 PetriNetUnfolderBase]: For 382144/382144 co-relation queries the response was YES. [2024-06-27 19:51:31,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40405 conditions, 5412 events. 3526/5412 cut-off events. For 382144/382144 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29239 event pairs, 921 based on Foata normal form. 4/5416 useless extension candidates. Maximal degree in co-relation 40320. Up to 5178 conditions per place. [2024-06-27 19:51:31,362 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 20 changer transitions 0/237 dead transitions. [2024-06-27 19:51:31,362 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 237 transitions, 2871 flow [2024-06-27 19:51:31,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:31,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:31,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 19:51:31,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 19:51:31,364 INFO L175 Difference]: Start difference. First operand has 180 places, 206 transitions, 2301 flow. Second operand 9 states and 157 transitions. [2024-06-27 19:51:31,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 237 transitions, 2871 flow [2024-06-27 19:51:31,858 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 181 places, 237 transitions, 2778 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:31,861 INFO L231 Difference]: Finished difference. Result has 182 places, 208 transitions, 2311 flow [2024-06-27 19:51:31,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2208, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=186, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2311, PETRI_PLACES=182, PETRI_TRANSITIONS=208} [2024-06-27 19:51:31,861 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 139 predicate places. [2024-06-27 19:51:31,862 INFO L495 AbstractCegarLoop]: Abstraction has has 182 places, 208 transitions, 2311 flow [2024-06-27 19:51:31,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:31,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:31,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:31,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-27 19:51:31,862 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:31,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash 198173491, now seen corresponding path program 5 times [2024-06-27 19:51:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:31,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046253518] [2024-06-27 19:51:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:31,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:31,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:32,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:32,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046253518] [2024-06-27 19:51:32,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046253518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:32,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:32,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:32,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1943728886] [2024-06-27 19:51:32,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:32,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:32,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:32,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:32,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:33,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:33,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 182 places, 208 transitions, 2311 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:33,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:33,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:33,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:33,948 INFO L124 PetriNetUnfolderBase]: 3518/5400 cut-off events. [2024-06-27 19:51:33,949 INFO L125 PetriNetUnfolderBase]: For 393450/393450 co-relation queries the response was YES. [2024-06-27 19:51:33,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40431 conditions, 5400 events. 3518/5400 cut-off events. For 393450/393450 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29215 event pairs, 958 based on Foata normal form. 4/5404 useless extension candidates. Maximal degree in co-relation 40345. Up to 5144 conditions per place. [2024-06-27 19:51:34,000 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 199 selfloop transitions, 26 changer transitions 0/239 dead transitions. [2024-06-27 19:51:34,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 239 transitions, 2891 flow [2024-06-27 19:51:34,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:34,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-27 19:51:34,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41798941798941797 [2024-06-27 19:51:34,001 INFO L175 Difference]: Start difference. First operand has 182 places, 208 transitions, 2311 flow. Second operand 9 states and 158 transitions. [2024-06-27 19:51:34,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 239 transitions, 2891 flow [2024-06-27 19:51:34,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 239 transitions, 2806 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:34,485 INFO L231 Difference]: Finished difference. Result has 184 places, 210 transitions, 2348 flow [2024-06-27 19:51:34,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2226, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2348, PETRI_PLACES=184, PETRI_TRANSITIONS=210} [2024-06-27 19:51:34,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 19:51:34,486 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 210 transitions, 2348 flow [2024-06-27 19:51:34,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:34,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:34,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:34,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-27 19:51:34,486 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:34,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:34,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1798611066, now seen corresponding path program 1 times [2024-06-27 19:51:34,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:34,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845045133] [2024-06-27 19:51:34,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:34,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:34,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:35,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:35,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:35,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845045133] [2024-06-27 19:51:35,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845045133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:35,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:35,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 19:51:35,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257370215] [2024-06-27 19:51:35,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:35,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 19:51:35,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:35,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 19:51:35,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-27 19:51:35,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:35,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 210 transitions, 2348 flow. Second operand has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:35,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:35,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:35,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:36,525 INFO L124 PetriNetUnfolderBase]: 3535/5425 cut-off events. [2024-06-27 19:51:36,525 INFO L125 PetriNetUnfolderBase]: For 403546/403546 co-relation queries the response was YES. [2024-06-27 19:51:36,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40819 conditions, 5425 events. 3535/5425 cut-off events. For 403546/403546 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29398 event pairs, 956 based on Foata normal form. 2/5427 useless extension candidates. Maximal degree in co-relation 40732. Up to 5173 conditions per place. [2024-06-27 19:51:36,579 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 200 selfloop transitions, 28 changer transitions 0/242 dead transitions. [2024-06-27 19:51:36,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 242 transitions, 2913 flow [2024-06-27 19:51:36,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:51:36,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:51:36,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-27 19:51:36,580 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 19:51:36,580 INFO L175 Difference]: Start difference. First operand has 184 places, 210 transitions, 2348 flow. Second operand 9 states and 159 transitions. [2024-06-27 19:51:36,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 242 transitions, 2913 flow [2024-06-27 19:51:37,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 242 transitions, 2805 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-27 19:51:37,090 INFO L231 Difference]: Finished difference. Result has 186 places, 213 transitions, 2347 flow [2024-06-27 19:51:37,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2240, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2347, PETRI_PLACES=186, PETRI_TRANSITIONS=213} [2024-06-27 19:51:37,097 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 19:51:37,097 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 213 transitions, 2347 flow [2024-06-27 19:51:37,097 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 10.272727272727273) internal successors, (113), 11 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:37,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:37,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:37,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-27 19:51:37,098 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)] === [2024-06-27 19:51:37,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:37,098 INFO L85 PathProgramCache]: Analyzing trace with hash -108337709, now seen corresponding path program 3 times [2024-06-27 19:51:37,099 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:37,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152820704] [2024-06-27 19:51:37,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:37,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:37,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:37,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:37,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:37,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152820704] [2024-06-27 19:51:37,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152820704] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:37,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:37,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:37,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [325381095] [2024-06-27 19:51:37,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:37,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:37,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:37,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:37,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:37,785 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:37,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 213 transitions, 2347 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:37,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:37,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:37,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:38,610 INFO L124 PetriNetUnfolderBase]: 3650/5540 cut-off events. [2024-06-27 19:51:38,611 INFO L125 PetriNetUnfolderBase]: For 413953/413955 co-relation queries the response was YES. [2024-06-27 19:51:38,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41375 conditions, 5540 events. 3650/5540 cut-off events. For 413953/413955 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29518 event pairs, 1006 based on Foata normal form. 4/5544 useless extension candidates. Maximal degree in co-relation 41287. Up to 5487 conditions per place. [2024-06-27 19:51:38,668 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 196 selfloop transitions, 25 changer transitions 0/224 dead transitions. [2024-06-27 19:51:38,668 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 224 transitions, 2919 flow [2024-06-27 19:51:38,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:38,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-27 19:51:38,669 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3877551020408163 [2024-06-27 19:51:38,669 INFO L175 Difference]: Start difference. First operand has 186 places, 213 transitions, 2347 flow. Second operand 7 states and 114 transitions. [2024-06-27 19:51:38,669 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 224 transitions, 2919 flow [2024-06-27 19:51:39,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 224 transitions, 2802 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:39,146 INFO L231 Difference]: Finished difference. Result has 185 places, 213 transitions, 2288 flow [2024-06-27 19:51:39,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2230, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2288, PETRI_PLACES=185, PETRI_TRANSITIONS=213} [2024-06-27 19:51:39,146 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-27 19:51:39,146 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 213 transitions, 2288 flow [2024-06-27 19:51:39,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:39,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:39,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:39,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-27 19:51:39,147 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)] === [2024-06-27 19:51:39,147 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:39,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1595268888, now seen corresponding path program 2 times [2024-06-27 19:51:39,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:39,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657536014] [2024-06-27 19:51:39,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:39,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:39,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:39,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:39,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:39,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657536014] [2024-06-27 19:51:39,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [657536014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:39,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:39,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:39,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991158139] [2024-06-27 19:51:39,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:39,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:39,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:39,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:39,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:39,858 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:39,859 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 213 transitions, 2288 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:39,859 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:39,859 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:39,859 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:40,628 INFO L124 PetriNetUnfolderBase]: 3529/5414 cut-off events. [2024-06-27 19:51:40,628 INFO L125 PetriNetUnfolderBase]: For 428540/428540 co-relation queries the response was YES. [2024-06-27 19:51:40,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40794 conditions, 5414 events. 3529/5414 cut-off events. For 428540/428540 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 29327 event pairs, 1014 based on Foata normal form. 3/5403 useless extension candidates. Maximal degree in co-relation 40705. Up to 5242 conditions per place. [2024-06-27 19:51:40,683 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 190 selfloop transitions, 19 changer transitions 0/231 dead transitions. [2024-06-27 19:51:40,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 231 transitions, 2896 flow [2024-06-27 19:51:40,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:40,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:40,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-27 19:51:40,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-27 19:51:40,685 INFO L175 Difference]: Start difference. First operand has 185 places, 213 transitions, 2288 flow. Second operand 7 states and 121 transitions. [2024-06-27 19:51:40,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 231 transitions, 2896 flow [2024-06-27 19:51:41,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 231 transitions, 2766 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:41,206 INFO L231 Difference]: Finished difference. Result has 184 places, 216 transitions, 2248 flow [2024-06-27 19:51:41,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2158, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=197, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2248, PETRI_PLACES=184, PETRI_TRANSITIONS=216} [2024-06-27 19:51:41,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-27 19:51:41,207 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 216 transitions, 2248 flow [2024-06-27 19:51:41,207 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:41,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:41,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:41,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-27 19:51:41,208 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:41,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:41,208 INFO L85 PathProgramCache]: Analyzing trace with hash -733570304, now seen corresponding path program 3 times [2024-06-27 19:51:41,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:41,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121255845] [2024-06-27 19:51:41,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:41,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:41,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:41,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:41,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121255845] [2024-06-27 19:51:41,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121255845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:41,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:41,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:41,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744995114] [2024-06-27 19:51:41,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:41,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:41,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:41,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:41,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:41,771 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:51:41,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 216 transitions, 2248 flow. Second operand has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:41,771 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:41,771 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:51:41,771 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:42,684 INFO L124 PetriNetUnfolderBase]: 3520/5402 cut-off events. [2024-06-27 19:51:42,684 INFO L125 PetriNetUnfolderBase]: For 438329/438329 co-relation queries the response was YES. [2024-06-27 19:51:42,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40649 conditions, 5402 events. 3520/5402 cut-off events. For 438329/438329 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 29263 event pairs, 1012 based on Foata normal form. 3/5391 useless extension candidates. Maximal degree in co-relation 40561. Up to 5247 conditions per place. [2024-06-27 19:51:42,737 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 192 selfloop transitions, 14 changer transitions 0/228 dead transitions. [2024-06-27 19:51:42,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 228 transitions, 2690 flow [2024-06-27 19:51:42,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:42,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:51:42,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 19:51:42,738 INFO L175 Difference]: Start difference. First operand has 184 places, 216 transitions, 2248 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:51:42,739 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 228 transitions, 2690 flow [2024-06-27 19:51:43,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 228 transitions, 2588 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-27 19:51:43,253 INFO L231 Difference]: Finished difference. Result has 186 places, 216 transitions, 2180 flow [2024-06-27 19:51:43,253 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2146, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2180, PETRI_PLACES=186, PETRI_TRANSITIONS=216} [2024-06-27 19:51:43,253 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-27 19:51:43,253 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 216 transitions, 2180 flow [2024-06-27 19:51:43,254 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.75) internal successors, (86), 8 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:43,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:43,254 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:43,254 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-27 19:51:43,254 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:43,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:43,254 INFO L85 PathProgramCache]: Analyzing trace with hash -940634649, now seen corresponding path program 1 times [2024-06-27 19:51:43,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:43,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590219205] [2024-06-27 19:51:43,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:43,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:43,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:43,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:43,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590219205] [2024-06-27 19:51:43,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590219205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:43,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:43,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:43,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491817221] [2024-06-27 19:51:43,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:43,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:43,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:43,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:43,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:43,940 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:43,940 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 216 transitions, 2180 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:43,940 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:43,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:43,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:44,931 INFO L124 PetriNetUnfolderBase]: 3661/5555 cut-off events. [2024-06-27 19:51:44,931 INFO L125 PetriNetUnfolderBase]: For 450126/450126 co-relation queries the response was YES. [2024-06-27 19:51:44,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41687 conditions, 5555 events. 3661/5555 cut-off events. For 450126/450126 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29526 event pairs, 1027 based on Foata normal form. 1/5556 useless extension candidates. Maximal degree in co-relation 41599. Up to 5507 conditions per place. [2024-06-27 19:51:44,982 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 212 selfloop transitions, 24 changer transitions 0/239 dead transitions. [2024-06-27 19:51:44,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 239 transitions, 2868 flow [2024-06-27 19:51:44,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:44,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:44,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:51:44,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 19:51:44,983 INFO L175 Difference]: Start difference. First operand has 186 places, 216 transitions, 2180 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:51:44,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 239 transitions, 2868 flow [2024-06-27 19:51:45,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 239 transitions, 2826 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:45,400 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 2262 flow [2024-06-27 19:51:45,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2138, PETRI_DIFFERENCE_MINUEND_PLACES=180, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2262, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-27 19:51:45,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 144 predicate places. [2024-06-27 19:51:45,400 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 2262 flow [2024-06-27 19:51:45,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:45,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:45,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:45,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-27 19:51:45,401 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:45,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:45,402 INFO L85 PathProgramCache]: Analyzing trace with hash -940484702, now seen corresponding path program 1 times [2024-06-27 19:51:45,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:45,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383443432] [2024-06-27 19:51:45,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:45,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:45,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:45,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:45,972 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:45,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383443432] [2024-06-27 19:51:45,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383443432] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:45,972 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:45,972 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:45,973 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334924022] [2024-06-27 19:51:45,973 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:45,973 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:45,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:45,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:45,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:46,033 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:46,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 2262 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:46,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:46,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:46,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:47,036 INFO L124 PetriNetUnfolderBase]: 3676/5576 cut-off events. [2024-06-27 19:51:47,036 INFO L125 PetriNetUnfolderBase]: For 470056/470056 co-relation queries the response was YES. [2024-06-27 19:51:47,068 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42555 conditions, 5576 events. 3676/5576 cut-off events. For 470056/470056 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29657 event pairs, 1011 based on Foata normal form. 3/5579 useless extension candidates. Maximal degree in co-relation 42466. Up to 5508 conditions per place. [2024-06-27 19:51:47,086 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 219 selfloop transitions, 25 changer transitions 0/247 dead transitions. [2024-06-27 19:51:47,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 247 transitions, 2986 flow [2024-06-27 19:51:47,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:47,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:47,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-27 19:51:47,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-27 19:51:47,093 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 2262 flow. Second operand 7 states and 122 transitions. [2024-06-27 19:51:47,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 247 transitions, 2986 flow [2024-06-27 19:51:47,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 247 transitions, 2928 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-27 19:51:47,527 INFO L231 Difference]: Finished difference. Result has 191 places, 228 transitions, 2342 flow [2024-06-27 19:51:47,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2204, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2342, PETRI_PLACES=191, PETRI_TRANSITIONS=228} [2024-06-27 19:51:47,528 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 148 predicate places. [2024-06-27 19:51:47,528 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 228 transitions, 2342 flow [2024-06-27 19:51:47,528 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:47,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:47,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:47,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-27 19:51:47,528 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:47,529 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:47,529 INFO L85 PathProgramCache]: Analyzing trace with hash -741183129, now seen corresponding path program 2 times [2024-06-27 19:51:47,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:47,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [80368018] [2024-06-27 19:51:47,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:47,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:47,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:48,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:48,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:48,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [80368018] [2024-06-27 19:51:48,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [80368018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:48,046 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:48,046 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:48,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535185965] [2024-06-27 19:51:48,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:48,046 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:48,046 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:48,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:48,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:48,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:48,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 228 transitions, 2342 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:48,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:48,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:48,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:49,147 INFO L124 PetriNetUnfolderBase]: 3681/5583 cut-off events. [2024-06-27 19:51:49,147 INFO L125 PetriNetUnfolderBase]: For 482290/482290 co-relation queries the response was YES. [2024-06-27 19:51:49,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42966 conditions, 5583 events. 3681/5583 cut-off events. For 482290/482290 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29721 event pairs, 1011 based on Foata normal form. 1/5584 useless extension candidates. Maximal degree in co-relation 42875. Up to 5534 conditions per place. [2024-06-27 19:51:49,201 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 26 changer transitions 0/245 dead transitions. [2024-06-27 19:51:49,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 245 transitions, 3000 flow [2024-06-27 19:51:49,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-27 19:51:49,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-27 19:51:49,203 INFO L175 Difference]: Start difference. First operand has 191 places, 228 transitions, 2342 flow. Second operand 7 states and 116 transitions. [2024-06-27 19:51:49,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 245 transitions, 3000 flow [2024-06-27 19:51:49,742 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 245 transitions, 2950 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-27 19:51:49,747 INFO L231 Difference]: Finished difference. Result has 195 places, 231 transitions, 2376 flow [2024-06-27 19:51:49,747 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2292, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2376, PETRI_PLACES=195, PETRI_TRANSITIONS=231} [2024-06-27 19:51:49,747 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 152 predicate places. [2024-06-27 19:51:49,747 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 231 transitions, 2376 flow [2024-06-27 19:51:49,748 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:49,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:49,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:49,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-27 19:51:49,748 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)] === [2024-06-27 19:51:49,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:49,748 INFO L85 PathProgramCache]: Analyzing trace with hash -1040971776, now seen corresponding path program 2 times [2024-06-27 19:51:49,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:49,749 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430051232] [2024-06-27 19:51:49,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:49,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:49,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:50,319 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:50,319 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430051232] [2024-06-27 19:51:50,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430051232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:50,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:50,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:50,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1200776279] [2024-06-27 19:51:50,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:50,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:50,320 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:50,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:50,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:50,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:50,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 231 transitions, 2376 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:50,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:50,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:50,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:51,465 INFO L124 PetriNetUnfolderBase]: 3696/5605 cut-off events. [2024-06-27 19:51:51,466 INFO L125 PetriNetUnfolderBase]: For 501264/501266 co-relation queries the response was YES. [2024-06-27 19:51:51,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43360 conditions, 5605 events. 3696/5605 cut-off events. For 501264/501266 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29856 event pairs, 1011 based on Foata normal form. 5/5610 useless extension candidates. Maximal degree in co-relation 43267. Up to 5529 conditions per place. [2024-06-27 19:51:51,514 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 220 selfloop transitions, 28 changer transitions 0/251 dead transitions. [2024-06-27 19:51:51,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 251 transitions, 3074 flow [2024-06-27 19:51:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:51,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:51,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-27 19:51:51,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 19:51:51,515 INFO L175 Difference]: Start difference. First operand has 195 places, 231 transitions, 2376 flow. Second operand 7 states and 119 transitions. [2024-06-27 19:51:51,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 251 transitions, 3074 flow [2024-06-27 19:51:52,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 251 transitions, 3024 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-27 19:51:52,073 INFO L231 Difference]: Finished difference. Result has 198 places, 234 transitions, 2430 flow [2024-06-27 19:51:52,074 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2326, PETRI_DIFFERENCE_MINUEND_PLACES=191, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=231, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2430, PETRI_PLACES=198, PETRI_TRANSITIONS=234} [2024-06-27 19:51:52,074 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 155 predicate places. [2024-06-27 19:51:52,074 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 234 transitions, 2430 flow [2024-06-27 19:51:52,074 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:52,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:52,075 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:52,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-27 19:51:52,075 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:52,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:52,076 INFO L85 PathProgramCache]: Analyzing trace with hash -1595084593, now seen corresponding path program 3 times [2024-06-27 19:51:52,076 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:52,076 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152865445] [2024-06-27 19:51:52,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:52,076 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:52,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:52,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:52,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:52,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152865445] [2024-06-27 19:51:52,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152865445] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:52,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:52,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:52,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937308392] [2024-06-27 19:51:52,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:52,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:52,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:52,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:52,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:52,815 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:52,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 234 transitions, 2430 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:52,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:52,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:52,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:53,898 INFO L124 PetriNetUnfolderBase]: 3693/5602 cut-off events. [2024-06-27 19:51:53,898 INFO L125 PetriNetUnfolderBase]: For 511999/512001 co-relation queries the response was YES. [2024-06-27 19:51:53,932 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43589 conditions, 5602 events. 3693/5602 cut-off events. For 511999/512001 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29837 event pairs, 1018 based on Foata normal form. 3/5605 useless extension candidates. Maximal degree in co-relation 43495. Up to 5552 conditions per place. [2024-06-27 19:51:53,955 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 215 selfloop transitions, 26 changer transitions 0/244 dead transitions. [2024-06-27 19:51:53,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 244 transitions, 2936 flow [2024-06-27 19:51:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:53,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:53,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-27 19:51:53,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 19:51:53,956 INFO L175 Difference]: Start difference. First operand has 198 places, 234 transitions, 2430 flow. Second operand 7 states and 112 transitions. [2024-06-27 19:51:53,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 244 transitions, 2936 flow [2024-06-27 19:51:54,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 199 places, 244 transitions, 2834 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-27 19:51:54,523 INFO L231 Difference]: Finished difference. Result has 200 places, 234 transitions, 2386 flow [2024-06-27 19:51:54,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2328, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2386, PETRI_PLACES=200, PETRI_TRANSITIONS=234} [2024-06-27 19:51:54,524 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 157 predicate places. [2024-06-27 19:51:54,524 INFO L495 AbstractCegarLoop]: Abstraction has has 200 places, 234 transitions, 2386 flow [2024-06-27 19:51:54,524 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:54,524 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:54,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:54,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-27 19:51:54,525 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:54,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:54,525 INFO L85 PathProgramCache]: Analyzing trace with hash -934913072, now seen corresponding path program 3 times [2024-06-27 19:51:54,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:54,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958769542] [2024-06-27 19:51:54,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:54,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:54,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:55,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:55,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:55,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958769542] [2024-06-27 19:51:55,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958769542] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:55,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:55,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:51:55,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53933203] [2024-06-27 19:51:55,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:55,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:51:55,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:55,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:51:55,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:51:55,156 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:55,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 200 places, 234 transitions, 2386 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:55,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:55,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:55,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:56,201 INFO L124 PetriNetUnfolderBase]: 3684/5589 cut-off events. [2024-06-27 19:51:56,202 INFO L125 PetriNetUnfolderBase]: For 524707/524709 co-relation queries the response was YES. [2024-06-27 19:51:56,246 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43457 conditions, 5589 events. 3684/5589 cut-off events. For 524707/524709 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 29785 event pairs, 1024 based on Foata normal form. 5/5594 useless extension candidates. Maximal degree in co-relation 43362. Up to 5518 conditions per place. [2024-06-27 19:51:56,269 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 216 selfloop transitions, 29 changer transitions 0/248 dead transitions. [2024-06-27 19:51:56,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 248 transitions, 2912 flow [2024-06-27 19:51:56,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:51:56,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:51:56,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-27 19:51:56,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-27 19:51:56,270 INFO L175 Difference]: Start difference. First operand has 200 places, 234 transitions, 2386 flow. Second operand 7 states and 115 transitions. [2024-06-27 19:51:56,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 248 transitions, 2912 flow [2024-06-27 19:51:57,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 198 places, 248 transitions, 2814 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-27 19:51:57,030 INFO L231 Difference]: Finished difference. Result has 199 places, 234 transitions, 2353 flow [2024-06-27 19:51:57,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2288, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2353, PETRI_PLACES=199, PETRI_TRANSITIONS=234} [2024-06-27 19:51:57,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 156 predicate places. [2024-06-27 19:51:57,031 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 234 transitions, 2353 flow [2024-06-27 19:51:57,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:51:57,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:57,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:57,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-27 19:51:57,031 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:57,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:57,032 INFO L85 PathProgramCache]: Analyzing trace with hash -302571696, now seen corresponding path program 1 times [2024-06-27 19:51:57,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:57,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968426164] [2024-06-27 19:51:57,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:57,032 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:57,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:51:57,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:51:57,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:51:57,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968426164] [2024-06-27 19:51:57,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968426164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:51:57,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:51:57,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:51:57,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245840414] [2024-06-27 19:51:57,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:51:57,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:51:57,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:51:57,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:51:57,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:51:57,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:51:57,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 234 transitions, 2353 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:51:57,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:51:57,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:51:57,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:51:58,814 INFO L124 PetriNetUnfolderBase]: 3702/5614 cut-off events. [2024-06-27 19:51:58,814 INFO L125 PetriNetUnfolderBase]: For 540593/540595 co-relation queries the response was YES. [2024-06-27 19:51:58,851 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43910 conditions, 5614 events. 3702/5614 cut-off events. For 540593/540595 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 29962 event pairs, 1027 based on Foata normal form. 4/5618 useless extension candidates. Maximal degree in co-relation 43815. Up to 5410 conditions per place. [2024-06-27 19:51:58,872 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 212 selfloop transitions, 58 changer transitions 0/273 dead transitions. [2024-06-27 19:51:58,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 273 transitions, 3335 flow [2024-06-27 19:51:58,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:51:58,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:51:58,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:51:58,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 19:51:58,874 INFO L175 Difference]: Start difference. First operand has 199 places, 234 transitions, 2353 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:51:58,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 273 transitions, 3335 flow [2024-06-27 19:51:59,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 273 transitions, 3265 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-27 19:51:59,556 INFO L231 Difference]: Finished difference. Result has 201 places, 242 transitions, 2534 flow [2024-06-27 19:51:59,556 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2283, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2534, PETRI_PLACES=201, PETRI_TRANSITIONS=242} [2024-06-27 19:51:59,556 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 158 predicate places. [2024-06-27 19:51:59,556 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 242 transitions, 2534 flow [2024-06-27 19:51:59,557 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:51:59,557 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:51:59,557 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:51:59,557 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-27 19:51:59,557 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:51:59,557 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:51:59,557 INFO L85 PathProgramCache]: Analyzing trace with hash -302272794, now seen corresponding path program 1 times [2024-06-27 19:51:59,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:51:59,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67538162] [2024-06-27 19:51:59,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:51:59,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:51:59,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:00,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:00,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:00,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67538162] [2024-06-27 19:52:00,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67538162] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:00,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:00,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:00,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1012534355] [2024-06-27 19:52:00,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:00,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:00,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:00,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:00,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:00,299 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:00,299 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 242 transitions, 2534 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:00,299 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:00,299 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:00,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:01,234 INFO L124 PetriNetUnfolderBase]: 3804/5755 cut-off events. [2024-06-27 19:52:01,234 INFO L125 PetriNetUnfolderBase]: For 582606/582608 co-relation queries the response was YES. [2024-06-27 19:52:01,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46266 conditions, 5755 events. 3804/5755 cut-off events. For 582606/582608 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30787 event pairs, 1041 based on Foata normal form. 8/5763 useless extension candidates. Maximal degree in co-relation 46170. Up to 5406 conditions per place. [2024-06-27 19:52:01,298 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 224 selfloop transitions, 65 changer transitions 0/292 dead transitions. [2024-06-27 19:52:01,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 208 places, 292 transitions, 3666 flow [2024-06-27 19:52:01,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:01,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:01,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-27 19:52:01,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 19:52:01,299 INFO L175 Difference]: Start difference. First operand has 201 places, 242 transitions, 2534 flow. Second operand 8 states and 152 transitions. [2024-06-27 19:52:01,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 208 places, 292 transitions, 3666 flow [2024-06-27 19:52:01,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 292 transitions, 3529 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:01,990 INFO L231 Difference]: Finished difference. Result has 207 places, 261 transitions, 2841 flow [2024-06-27 19:52:01,990 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2841, PETRI_PLACES=207, PETRI_TRANSITIONS=261} [2024-06-27 19:52:01,990 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 164 predicate places. [2024-06-27 19:52:01,991 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 261 transitions, 2841 flow [2024-06-27 19:52:01,991 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:01,991 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:01,991 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:01,991 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-27 19:52:01,991 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:01,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:01,992 INFO L85 PathProgramCache]: Analyzing trace with hash 1443489094, now seen corresponding path program 2 times [2024-06-27 19:52:01,992 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:01,992 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387902987] [2024-06-27 19:52:01,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:01,992 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:01,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:02,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:02,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:02,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387902987] [2024-06-27 19:52:02,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387902987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:02,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:02,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:02,781 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440160869] [2024-06-27 19:52:02,781 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:02,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:02,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:02,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:02,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:02,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:02,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 261 transitions, 2841 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:02,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:02,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:02,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:03,819 INFO L124 PetriNetUnfolderBase]: 3814/5769 cut-off events. [2024-06-27 19:52:03,820 INFO L125 PetriNetUnfolderBase]: For 598468/598470 co-relation queries the response was YES. [2024-06-27 19:52:03,861 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47714 conditions, 5769 events. 3814/5769 cut-off events. For 598468/598470 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 30850 event pairs, 1031 based on Foata normal form. 4/5773 useless extension candidates. Maximal degree in co-relation 47614. Up to 5607 conditions per place. [2024-06-27 19:52:03,885 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 235 selfloop transitions, 51 changer transitions 0/289 dead transitions. [2024-06-27 19:52:03,885 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 289 transitions, 3645 flow [2024-06-27 19:52:03,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:03,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:03,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:52:03,886 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 19:52:03,886 INFO L175 Difference]: Start difference. First operand has 207 places, 261 transitions, 2841 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:52:03,887 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 289 transitions, 3645 flow [2024-06-27 19:52:04,707 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 289 transitions, 3564 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-27 19:52:04,710 INFO L231 Difference]: Finished difference. Result has 213 places, 265 transitions, 2923 flow [2024-06-27 19:52:04,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2760, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2923, PETRI_PLACES=213, PETRI_TRANSITIONS=265} [2024-06-27 19:52:04,712 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 170 predicate places. [2024-06-27 19:52:04,712 INFO L495 AbstractCegarLoop]: Abstraction has has 213 places, 265 transitions, 2923 flow [2024-06-27 19:52:04,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:04,713 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:04,713 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:04,713 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-27 19:52:04,713 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:04,713 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:04,713 INFO L85 PathProgramCache]: Analyzing trace with hash -292329358, now seen corresponding path program 1 times [2024-06-27 19:52:04,713 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:04,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466517014] [2024-06-27 19:52:04,714 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:04,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:04,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:05,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:05,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466517014] [2024-06-27 19:52:05,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466517014] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:05,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:05,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:05,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413339380] [2024-06-27 19:52:05,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:05,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:05,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:05,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:05,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:05,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:05,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 213 places, 265 transitions, 2923 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:05,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:05,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:05,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:06,429 INFO L124 PetriNetUnfolderBase]: 3840/5805 cut-off events. [2024-06-27 19:52:06,430 INFO L125 PetriNetUnfolderBase]: For 617478/617480 co-relation queries the response was YES. [2024-06-27 19:52:06,469 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48277 conditions, 5805 events. 3840/5805 cut-off events. For 617478/617480 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 31026 event pairs, 1045 based on Foata normal form. 4/5809 useless extension candidates. Maximal degree in co-relation 48174. Up to 5635 conditions per place. [2024-06-27 19:52:06,490 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 239 selfloop transitions, 54 changer transitions 0/296 dead transitions. [2024-06-27 19:52:06,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 296 transitions, 3994 flow [2024-06-27 19:52:06,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:06,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:06,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-27 19:52:06,492 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-27 19:52:06,492 INFO L175 Difference]: Start difference. First operand has 213 places, 265 transitions, 2923 flow. Second operand 7 states and 127 transitions. [2024-06-27 19:52:06,492 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 296 transitions, 3994 flow [2024-06-27 19:52:07,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 296 transitions, 3847 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:07,179 INFO L231 Difference]: Finished difference. Result has 215 places, 275 transitions, 3091 flow [2024-06-27 19:52:07,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2796, PETRI_DIFFERENCE_MINUEND_PLACES=207, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3091, PETRI_PLACES=215, PETRI_TRANSITIONS=275} [2024-06-27 19:52:07,179 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-27 19:52:07,179 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 275 transitions, 3091 flow [2024-06-27 19:52:07,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:07,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:07,180 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:07,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-27 19:52:07,180 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)] === [2024-06-27 19:52:07,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:07,180 INFO L85 PathProgramCache]: Analyzing trace with hash 1453670052, now seen corresponding path program 2 times [2024-06-27 19:52:07,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:07,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716283827] [2024-06-27 19:52:07,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:07,181 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:07,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:07,748 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:07,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:07,749 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716283827] [2024-06-27 19:52:07,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716283827] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:07,749 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:07,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:07,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163718963] [2024-06-27 19:52:07,749 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:07,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:07,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:07,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:07,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:07,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:07,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 275 transitions, 3091 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:07,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:07,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:07,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:08,729 INFO L124 PetriNetUnfolderBase]: 3834/5797 cut-off events. [2024-06-27 19:52:08,729 INFO L125 PetriNetUnfolderBase]: For 630629/630631 co-relation queries the response was YES. [2024-06-27 19:52:08,765 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48371 conditions, 5797 events. 3834/5797 cut-off events. For 630629/630631 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 30972 event pairs, 1041 based on Foata normal form. 4/5801 useless extension candidates. Maximal degree in co-relation 48266. Up to 5630 conditions per place. [2024-06-27 19:52:08,784 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 240 selfloop transitions, 50 changer transitions 0/293 dead transitions. [2024-06-27 19:52:08,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 293 transitions, 3975 flow [2024-06-27 19:52:08,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:08,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:08,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-27 19:52:08,785 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-27 19:52:08,785 INFO L175 Difference]: Start difference. First operand has 215 places, 275 transitions, 3091 flow. Second operand 7 states and 124 transitions. [2024-06-27 19:52:08,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 293 transitions, 3975 flow [2024-06-27 19:52:09,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 293 transitions, 3895 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-27 19:52:09,639 INFO L231 Difference]: Finished difference. Result has 219 places, 275 transitions, 3120 flow [2024-06-27 19:52:09,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3011, PETRI_DIFFERENCE_MINUEND_PLACES=212, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3120, PETRI_PLACES=219, PETRI_TRANSITIONS=275} [2024-06-27 19:52:09,640 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 176 predicate places. [2024-06-27 19:52:09,640 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 275 transitions, 3120 flow [2024-06-27 19:52:09,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:09,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:09,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:09,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-27 19:52:09,640 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:09,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:09,641 INFO L85 PathProgramCache]: Analyzing trace with hash 2118127149, now seen corresponding path program 1 times [2024-06-27 19:52:09,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:09,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521879733] [2024-06-27 19:52:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:09,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:09,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:10,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:10,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:10,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521879733] [2024-06-27 19:52:10,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521879733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:10,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:10,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:10,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509666448] [2024-06-27 19:52:10,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:10,756 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:10,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:10,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:10,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:10,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:52:10,957 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 275 transitions, 3120 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:10,957 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:10,957 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:52:10,957 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:12,244 INFO L124 PetriNetUnfolderBase]: 3763/5737 cut-off events. [2024-06-27 19:52:12,244 INFO L125 PetriNetUnfolderBase]: For 659100/659102 co-relation queries the response was YES. [2024-06-27 19:52:12,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48596 conditions, 5737 events. 3763/5737 cut-off events. For 659100/659102 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 31094 event pairs, 839 based on Foata normal form. 4/5731 useless extension candidates. Maximal degree in co-relation 48490. Up to 5099 conditions per place. [2024-06-27 19:52:12,306 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 251 selfloop transitions, 61 changer transitions 0/335 dead transitions. [2024-06-27 19:52:12,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 335 transitions, 4035 flow [2024-06-27 19:52:12,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:52:12,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:52:12,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 221 transitions. [2024-06-27 19:52:12,307 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4384920634920635 [2024-06-27 19:52:12,307 INFO L175 Difference]: Start difference. First operand has 219 places, 275 transitions, 3120 flow. Second operand 12 states and 221 transitions. [2024-06-27 19:52:12,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 335 transitions, 4035 flow [2024-06-27 19:52:13,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 335 transitions, 3944 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:13,290 INFO L231 Difference]: Finished difference. Result has 230 places, 287 transitions, 3346 flow [2024-06-27 19:52:13,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3029, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3346, PETRI_PLACES=230, PETRI_TRANSITIONS=287} [2024-06-27 19:52:13,291 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 187 predicate places. [2024-06-27 19:52:13,291 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 287 transitions, 3346 flow [2024-06-27 19:52:13,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:13,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:13,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:13,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-27 19:52:13,291 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)] === [2024-06-27 19:52:13,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:13,292 INFO L85 PathProgramCache]: Analyzing trace with hash -292083714, now seen corresponding path program 2 times [2024-06-27 19:52:13,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:13,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083276110] [2024-06-27 19:52:13,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:13,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:13,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:14,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:14,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:14,004 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083276110] [2024-06-27 19:52:14,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083276110] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:14,004 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:14,004 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:14,004 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716007463] [2024-06-27 19:52:14,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:14,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:14,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:14,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:14,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:14,086 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:14,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 287 transitions, 3346 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:14,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:14,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:14,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:15,184 INFO L124 PetriNetUnfolderBase]: 3983/6007 cut-off events. [2024-06-27 19:52:15,185 INFO L125 PetriNetUnfolderBase]: For 707030/707032 co-relation queries the response was YES. [2024-06-27 19:52:15,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52179 conditions, 6007 events. 3983/6007 cut-off events. For 707030/707032 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32205 event pairs, 1002 based on Foata normal form. 8/6015 useless extension candidates. Maximal degree in co-relation 52069. Up to 5551 conditions per place. [2024-06-27 19:52:15,252 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 250 selfloop transitions, 72 changer transitions 0/325 dead transitions. [2024-06-27 19:52:15,252 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 325 transitions, 4656 flow [2024-06-27 19:52:15,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:15,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:15,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-27 19:52:15,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-27 19:52:15,255 INFO L175 Difference]: Start difference. First operand has 230 places, 287 transitions, 3346 flow. Second operand 8 states and 147 transitions. [2024-06-27 19:52:15,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 325 transitions, 4656 flow [2024-06-27 19:52:16,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 325 transitions, 4502 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:16,518 INFO L231 Difference]: Finished difference. Result has 233 places, 298 transitions, 3536 flow [2024-06-27 19:52:16,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3192, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=224, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3536, PETRI_PLACES=233, PETRI_TRANSITIONS=298} [2024-06-27 19:52:16,519 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 190 predicate places. [2024-06-27 19:52:16,519 INFO L495 AbstractCegarLoop]: Abstraction has has 233 places, 298 transitions, 3536 flow [2024-06-27 19:52:16,519 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:16,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:16,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:16,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-27 19:52:16,519 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)] === [2024-06-27 19:52:16,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:16,520 INFO L85 PathProgramCache]: Analyzing trace with hash 1686763296, now seen corresponding path program 3 times [2024-06-27 19:52:16,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:16,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319327642] [2024-06-27 19:52:16,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:16,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:16,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:17,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:17,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319327642] [2024-06-27 19:52:17,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319327642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:17,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:17,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:17,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601797069] [2024-06-27 19:52:17,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:17,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:17,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:17,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:17,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:17,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:17,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 233 places, 298 transitions, 3536 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:17,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:17,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:17,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:18,432 INFO L124 PetriNetUnfolderBase]: 3971/5992 cut-off events. [2024-06-27 19:52:18,432 INFO L125 PetriNetUnfolderBase]: For 712694/712696 co-relation queries the response was YES. [2024-06-27 19:52:18,474 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52117 conditions, 5992 events. 3971/5992 cut-off events. For 712694/712696 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32148 event pairs, 1005 based on Foata normal form. 8/6000 useless extension candidates. Maximal degree in co-relation 52004. Up to 5547 conditions per place. [2024-06-27 19:52:18,496 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 250 selfloop transitions, 73 changer transitions 0/326 dead transitions. [2024-06-27 19:52:18,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 326 transitions, 4557 flow [2024-06-27 19:52:18,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:18,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:18,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:52:18,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 19:52:18,498 INFO L175 Difference]: Start difference. First operand has 233 places, 298 transitions, 3536 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:52:18,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 326 transitions, 4557 flow [2024-06-27 19:52:19,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 326 transitions, 4397 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:19,531 INFO L231 Difference]: Finished difference. Result has 237 places, 299 transitions, 3556 flow [2024-06-27 19:52:19,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3556, PETRI_PLACES=237, PETRI_TRANSITIONS=299} [2024-06-27 19:52:19,532 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 194 predicate places. [2024-06-27 19:52:19,532 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 299 transitions, 3556 flow [2024-06-27 19:52:19,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:19,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:19,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:19,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-27 19:52:19,533 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)] === [2024-06-27 19:52:19,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:19,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1453666084, now seen corresponding path program 3 times [2024-06-27 19:52:19,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:19,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666472250] [2024-06-27 19:52:19,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:19,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:19,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:20,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:20,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:20,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666472250] [2024-06-27 19:52:20,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666472250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:20,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:20,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:20,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621634928] [2024-06-27 19:52:20,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:20,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:20,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:20,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:20,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:20,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:20,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 299 transitions, 3556 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:20,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:20,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:20,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:21,542 INFO L124 PetriNetUnfolderBase]: 3983/6009 cut-off events. [2024-06-27 19:52:21,542 INFO L125 PetriNetUnfolderBase]: For 726378/726380 co-relation queries the response was YES. [2024-06-27 19:52:21,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52236 conditions, 6009 events. 3983/6009 cut-off events. For 726378/726380 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 32273 event pairs, 989 based on Foata normal form. 4/6013 useless extension candidates. Maximal degree in co-relation 52122. Up to 5835 conditions per place. [2024-06-27 19:52:21,605 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 264 selfloop transitions, 55 changer transitions 0/322 dead transitions. [2024-06-27 19:52:21,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 322 transitions, 4570 flow [2024-06-27 19:52:21,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:52:21,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:52:21,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:52:21,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 19:52:21,607 INFO L175 Difference]: Start difference. First operand has 237 places, 299 transitions, 3556 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:52:21,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 322 transitions, 4570 flow [2024-06-27 19:52:22,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 322 transitions, 4422 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-27 19:52:22,703 INFO L231 Difference]: Finished difference. Result has 240 places, 303 transitions, 3587 flow [2024-06-27 19:52:22,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3408, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3587, PETRI_PLACES=240, PETRI_TRANSITIONS=303} [2024-06-27 19:52:22,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 197 predicate places. [2024-06-27 19:52:22,704 INFO L495 AbstractCegarLoop]: Abstraction has has 240 places, 303 transitions, 3587 flow [2024-06-27 19:52:22,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:22,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:22,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:22,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-27 19:52:22,705 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:22,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:22,705 INFO L85 PathProgramCache]: Analyzing trace with hash 321353734, now seen corresponding path program 3 times [2024-06-27 19:52:22,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:22,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [295620776] [2024-06-27 19:52:22,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:22,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:23,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:23,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:23,246 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [295620776] [2024-06-27 19:52:23,246 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [295620776] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:23,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:23,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:23,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830433798] [2024-06-27 19:52:23,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:23,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:23,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:23,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:23,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:23,327 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:23,327 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 303 transitions, 3587 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:23,327 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:23,327 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:23,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:24,377 INFO L124 PetriNetUnfolderBase]: 3970/5989 cut-off events. [2024-06-27 19:52:24,378 INFO L125 PetriNetUnfolderBase]: For 739509/739509 co-relation queries the response was YES. [2024-06-27 19:52:24,419 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52077 conditions, 5989 events. 3970/5989 cut-off events. For 739509/739509 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32162 event pairs, 986 based on Foata normal form. 1/5990 useless extension candidates. Maximal degree in co-relation 51962. Up to 5941 conditions per place. [2024-06-27 19:52:24,441 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 293 selfloop transitions, 24 changer transitions 0/320 dead transitions. [2024-06-27 19:52:24,441 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 320 transitions, 4403 flow [2024-06-27 19:52:24,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:24,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:24,442 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-27 19:52:24,442 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4013605442176871 [2024-06-27 19:52:24,442 INFO L175 Difference]: Start difference. First operand has 240 places, 303 transitions, 3587 flow. Second operand 7 states and 118 transitions. [2024-06-27 19:52:24,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 320 transitions, 4403 flow [2024-06-27 19:52:25,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 320 transitions, 4257 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 19:52:25,411 INFO L231 Difference]: Finished difference. Result has 242 places, 303 transitions, 3495 flow [2024-06-27 19:52:25,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3441, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3495, PETRI_PLACES=242, PETRI_TRANSITIONS=303} [2024-06-27 19:52:25,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 199 predicate places. [2024-06-27 19:52:25,412 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 303 transitions, 3495 flow [2024-06-27 19:52:25,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:25,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:25,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:25,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-27 19:52:25,413 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:25,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:25,413 INFO L85 PathProgramCache]: Analyzing trace with hash 929301068, now seen corresponding path program 4 times [2024-06-27 19:52:25,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:25,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141887038] [2024-06-27 19:52:25,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:25,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:25,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:25,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:25,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:25,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141887038] [2024-06-27 19:52:25,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141887038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:25,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:25,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:25,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810986711] [2024-06-27 19:52:25,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:25,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:25,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:25,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:25,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:25,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:25,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 303 transitions, 3495 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:25,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:25,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:25,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:27,169 INFO L124 PetriNetUnfolderBase]: 3975/5996 cut-off events. [2024-06-27 19:52:27,170 INFO L125 PetriNetUnfolderBase]: For 755895/755895 co-relation queries the response was YES. [2024-06-27 19:52:27,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52213 conditions, 5996 events. 3975/5996 cut-off events. For 755895/755895 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 32139 event pairs, 997 based on Foata normal form. 1/5997 useless extension candidates. Maximal degree in co-relation 52097. Up to 5963 conditions per place. [2024-06-27 19:52:27,240 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 297 selfloop transitions, 19 changer transitions 0/319 dead transitions. [2024-06-27 19:52:27,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 319 transitions, 4219 flow [2024-06-27 19:52:27,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:27,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:27,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 19:52:27,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 19:52:27,242 INFO L175 Difference]: Start difference. First operand has 242 places, 303 transitions, 3495 flow. Second operand 7 states and 113 transitions. [2024-06-27 19:52:27,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 319 transitions, 4219 flow [2024-06-27 19:52:28,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 319 transitions, 4006 flow, removed 9 selfloop flow, removed 10 redundant places. [2024-06-27 19:52:28,526 INFO L231 Difference]: Finished difference. Result has 239 places, 306 transitions, 3392 flow [2024-06-27 19:52:28,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3296, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=303, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=284, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3392, PETRI_PLACES=239, PETRI_TRANSITIONS=306} [2024-06-27 19:52:28,526 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 196 predicate places. [2024-06-27 19:52:28,527 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 306 transitions, 3392 flow [2024-06-27 19:52:28,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:28,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:28,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:28,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-27 19:52:28,527 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)] === [2024-06-27 19:52:28,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash 275696881, now seen corresponding path program 2 times [2024-06-27 19:52:28,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:28,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781912411] [2024-06-27 19:52:28,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:28,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:29,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:29,524 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781912411] [2024-06-27 19:52:29,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781912411] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:29,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:29,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:29,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815642427] [2024-06-27 19:52:29,525 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:29,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:29,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:29,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:29,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:29,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:52:29,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 306 transitions, 3392 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:29,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:29,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:52:29,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:30,995 INFO L124 PetriNetUnfolderBase]: 3910/5951 cut-off events. [2024-06-27 19:52:30,996 INFO L125 PetriNetUnfolderBase]: For 783835/783835 co-relation queries the response was YES. [2024-06-27 19:52:31,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52244 conditions, 5951 events. 3910/5951 cut-off events. For 783835/783835 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 32420 event pairs, 949 based on Foata normal form. 4/5955 useless extension candidates. Maximal degree in co-relation 52128. Up to 5578 conditions per place. [2024-06-27 19:52:31,056 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 289 selfloop transitions, 34 changer transitions 0/348 dead transitions. [2024-06-27 19:52:31,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 348 transitions, 4252 flow [2024-06-27 19:52:31,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:31,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:31,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 179 transitions. [2024-06-27 19:52:31,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4261904761904762 [2024-06-27 19:52:31,058 INFO L175 Difference]: Start difference. First operand has 239 places, 306 transitions, 3392 flow. Second operand 10 states and 179 transitions. [2024-06-27 19:52:31,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 348 transitions, 4252 flow [2024-06-27 19:52:32,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 348 transitions, 4200 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-27 19:52:32,276 INFO L231 Difference]: Finished difference. Result has 246 places, 313 transitions, 3565 flow [2024-06-27 19:52:32,276 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3340, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3565, PETRI_PLACES=246, PETRI_TRANSITIONS=313} [2024-06-27 19:52:32,277 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 203 predicate places. [2024-06-27 19:52:32,277 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 313 transitions, 3565 flow [2024-06-27 19:52:32,277 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:32,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:32,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:32,277 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-27 19:52:32,277 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)] === [2024-06-27 19:52:32,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:32,278 INFO L85 PathProgramCache]: Analyzing trace with hash 1848412047, now seen corresponding path program 3 times [2024-06-27 19:52:32,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:32,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233212806] [2024-06-27 19:52:32,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:32,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:32,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:33,414 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:33,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:33,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233212806] [2024-06-27 19:52:33,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233212806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:33,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:33,415 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:33,415 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138961089] [2024-06-27 19:52:33,415 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:33,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:33,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:33,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:33,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:33,539 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:52:33,539 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 313 transitions, 3565 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:33,539 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:33,539 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:52:33,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:34,974 INFO L124 PetriNetUnfolderBase]: 3970/6045 cut-off events. [2024-06-27 19:52:34,974 INFO L125 PetriNetUnfolderBase]: For 823148/823148 co-relation queries the response was YES. [2024-06-27 19:52:35,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54077 conditions, 6045 events. 3970/6045 cut-off events. For 823148/823148 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 33060 event pairs, 950 based on Foata normal form. 8/6053 useless extension candidates. Maximal degree in co-relation 53958. Up to 5644 conditions per place. [2024-06-27 19:52:35,054 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 294 selfloop transitions, 36 changer transitions 0/355 dead transitions. [2024-06-27 19:52:35,054 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 355 transitions, 4706 flow [2024-06-27 19:52:35,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:35,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:35,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 178 transitions. [2024-06-27 19:52:35,055 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4238095238095238 [2024-06-27 19:52:35,055 INFO L175 Difference]: Start difference. First operand has 246 places, 313 transitions, 3565 flow. Second operand 10 states and 178 transitions. [2024-06-27 19:52:35,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 355 transitions, 4706 flow [2024-06-27 19:52:36,639 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 355 transitions, 4602 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-27 19:52:36,643 INFO L231 Difference]: Finished difference. Result has 253 places, 319 transitions, 3716 flow [2024-06-27 19:52:36,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3461, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=313, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=279, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3716, PETRI_PLACES=253, PETRI_TRANSITIONS=319} [2024-06-27 19:52:36,646 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 210 predicate places. [2024-06-27 19:52:36,647 INFO L495 AbstractCegarLoop]: Abstraction has has 253 places, 319 transitions, 3716 flow [2024-06-27 19:52:36,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:36,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:36,647 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:36,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-27 19:52:36,647 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:36,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:36,648 INFO L85 PathProgramCache]: Analyzing trace with hash 1848403429, now seen corresponding path program 1 times [2024-06-27 19:52:36,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:36,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860563770] [2024-06-27 19:52:36,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:36,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:36,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:37,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:37,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:37,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860563770] [2024-06-27 19:52:37,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860563770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:37,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:37,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:37,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653563836] [2024-06-27 19:52:37,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:37,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:37,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:37,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:37,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:38,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:52:38,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 253 places, 319 transitions, 3716 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:38,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:38,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:52:38,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:39,411 INFO L124 PetriNetUnfolderBase]: 3987/6070 cut-off events. [2024-06-27 19:52:39,411 INFO L125 PetriNetUnfolderBase]: For 829996/829996 co-relation queries the response was YES. [2024-06-27 19:52:39,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54409 conditions, 6070 events. 3987/6070 cut-off events. For 829996/829996 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 33225 event pairs, 943 based on Foata normal form. 2/6072 useless extension candidates. Maximal degree in co-relation 54287. Up to 5761 conditions per place. [2024-06-27 19:52:39,484 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 297 selfloop transitions, 34 changer transitions 0/356 dead transitions. [2024-06-27 19:52:39,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 356 transitions, 4497 flow [2024-06-27 19:52:39,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:39,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:39,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 176 transitions. [2024-06-27 19:52:39,486 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41904761904761906 [2024-06-27 19:52:39,486 INFO L175 Difference]: Start difference. First operand has 253 places, 319 transitions, 3716 flow. Second operand 10 states and 176 transitions. [2024-06-27 19:52:39,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 356 transitions, 4497 flow [2024-06-27 19:52:40,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 356 transitions, 4345 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:40,713 INFO L231 Difference]: Finished difference. Result has 257 places, 322 transitions, 3679 flow [2024-06-27 19:52:40,713 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3564, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=319, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3679, PETRI_PLACES=257, PETRI_TRANSITIONS=322} [2024-06-27 19:52:40,713 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 214 predicate places. [2024-06-27 19:52:40,713 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 322 transitions, 3679 flow [2024-06-27 19:52:40,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:40,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:40,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:40,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-27 19:52:40,714 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:40,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash 1848403677, now seen corresponding path program 4 times [2024-06-27 19:52:40,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:40,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95943122] [2024-06-27 19:52:40,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:40,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:40,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:41,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:41,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:41,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95943122] [2024-06-27 19:52:41,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95943122] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:41,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:41,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [557608604] [2024-06-27 19:52:41,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:41,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:41,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:41,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:41,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:41,981 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:52:41,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 322 transitions, 3679 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:41,981 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:41,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:52:41,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:43,339 INFO L124 PetriNetUnfolderBase]: 3979/6058 cut-off events. [2024-06-27 19:52:43,339 INFO L125 PetriNetUnfolderBase]: For 845306/845306 co-relation queries the response was YES. [2024-06-27 19:52:43,387 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54100 conditions, 6058 events. 3979/6058 cut-off events. For 845306/845306 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 33160 event pairs, 946 based on Foata normal form. 4/6062 useless extension candidates. Maximal degree in co-relation 53976. Up to 5745 conditions per place. [2024-06-27 19:52:43,419 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 300 selfloop transitions, 31 changer transitions 0/356 dead transitions. [2024-06-27 19:52:43,419 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 356 transitions, 4429 flow [2024-06-27 19:52:43,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:43,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:43,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-27 19:52:43,421 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 19:52:43,421 INFO L175 Difference]: Start difference. First operand has 257 places, 322 transitions, 3679 flow. Second operand 10 states and 175 transitions. [2024-06-27 19:52:43,421 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 356 transitions, 4429 flow [2024-06-27 19:52:44,550 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 356 transitions, 4282 flow, removed 23 selfloop flow, removed 9 redundant places. [2024-06-27 19:52:44,553 INFO L231 Difference]: Finished difference. Result has 258 places, 322 transitions, 3603 flow [2024-06-27 19:52:44,554 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3532, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3603, PETRI_PLACES=258, PETRI_TRANSITIONS=322} [2024-06-27 19:52:44,554 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 215 predicate places. [2024-06-27 19:52:44,554 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 322 transitions, 3603 flow [2024-06-27 19:52:44,554 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:44,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:44,554 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:44,555 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-27 19:52:44,555 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)] === [2024-06-27 19:52:44,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:44,557 INFO L85 PathProgramCache]: Analyzing trace with hash 1858531377, now seen corresponding path program 5 times [2024-06-27 19:52:44,557 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:44,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6471716] [2024-06-27 19:52:44,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:44,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:44,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:45,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:45,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:45,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6471716] [2024-06-27 19:52:45,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6471716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:45,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:45,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:45,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318575091] [2024-06-27 19:52:45,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:45,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:45,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:45,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:45,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:45,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:52:45,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 322 transitions, 3603 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:45,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:45,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:52:45,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:46,966 INFO L124 PetriNetUnfolderBase]: 3971/6046 cut-off events. [2024-06-27 19:52:46,967 INFO L125 PetriNetUnfolderBase]: For 858962/858962 co-relation queries the response was YES. [2024-06-27 19:52:47,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53884 conditions, 6046 events. 3971/6046 cut-off events. For 858962/858962 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 32971 event pairs, 933 based on Foata normal form. 4/6050 useless extension candidates. Maximal degree in co-relation 53759. Up to 5764 conditions per place. [2024-06-27 19:52:47,038 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 311 selfloop transitions, 22 changer transitions 0/358 dead transitions. [2024-06-27 19:52:47,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 358 transitions, 4403 flow [2024-06-27 19:52:47,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 19:52:47,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 19:52:47,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 19:52:47,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-27 19:52:47,039 INFO L175 Difference]: Start difference. First operand has 258 places, 322 transitions, 3603 flow. Second operand 10 states and 173 transitions. [2024-06-27 19:52:47,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 358 transitions, 4403 flow [2024-06-27 19:52:48,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 358 transitions, 4333 flow, removed 1 selfloop flow, removed 9 redundant places. [2024-06-27 19:52:48,102 INFO L231 Difference]: Finished difference. Result has 259 places, 324 transitions, 3638 flow [2024-06-27 19:52:48,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3533, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=300, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3638, PETRI_PLACES=259, PETRI_TRANSITIONS=324} [2024-06-27 19:52:48,102 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 216 predicate places. [2024-06-27 19:52:48,103 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 324 transitions, 3638 flow [2024-06-27 19:52:48,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:48,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:48,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:48,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-27 19:52:48,103 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)] === [2024-06-27 19:52:48,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:48,103 INFO L85 PathProgramCache]: Analyzing trace with hash -2062909391, now seen corresponding path program 6 times [2024-06-27 19:52:48,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:48,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392421900] [2024-06-27 19:52:48,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:48,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:48,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:49,150 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:49,150 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:49,151 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392421900] [2024-06-27 19:52:49,151 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392421900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:49,151 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:49,151 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-27 19:52:49,151 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484305682] [2024-06-27 19:52:49,151 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:49,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-27 19:52:49,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:49,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-27 19:52:49,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-27 19:52:49,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:52:49,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 324 transitions, 3638 flow. Second operand has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:49,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:49,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:52:49,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:50,737 INFO L124 PetriNetUnfolderBase]: 3963/6034 cut-off events. [2024-06-27 19:52:50,738 INFO L125 PetriNetUnfolderBase]: For 873024/873024 co-relation queries the response was YES. [2024-06-27 19:52:50,786 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53944 conditions, 6034 events. 3963/6034 cut-off events. For 873024/873024 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 32992 event pairs, 932 based on Foata normal form. 4/6038 useless extension candidates. Maximal degree in co-relation 53818. Up to 5648 conditions per place. [2024-06-27 19:52:50,810 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 309 selfloop transitions, 41 changer transitions 0/375 dead transitions. [2024-06-27 19:52:50,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 270 places, 375 transitions, 4587 flow [2024-06-27 19:52:50,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 19:52:50,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 19:52:50,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 212 transitions. [2024-06-27 19:52:50,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-27 19:52:50,812 INFO L175 Difference]: Start difference. First operand has 259 places, 324 transitions, 3638 flow. Second operand 12 states and 212 transitions. [2024-06-27 19:52:50,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 270 places, 375 transitions, 4587 flow [2024-06-27 19:52:52,294 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 375 transitions, 4500 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-27 19:52:52,298 INFO L231 Difference]: Finished difference. Result has 265 places, 331 transitions, 3793 flow [2024-06-27 19:52:52,299 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=3793, PETRI_PLACES=265, PETRI_TRANSITIONS=331} [2024-06-27 19:52:52,299 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-27 19:52:52,299 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 331 transitions, 3793 flow [2024-06-27 19:52:52,299 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 10.25) internal successors, (123), 12 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:52,299 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:52,299 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:52,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-27 19:52:52,300 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:52,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:52,300 INFO L85 PathProgramCache]: Analyzing trace with hash 1907413636, now seen corresponding path program 5 times [2024-06-27 19:52:52,300 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:52,300 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278456148] [2024-06-27 19:52:52,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:52,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:52,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:52,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:52,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:52,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278456148] [2024-06-27 19:52:52,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278456148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:52,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:52,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:52,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035611451] [2024-06-27 19:52:52,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:52,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:52,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:52,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:52,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:52,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:52,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 331 transitions, 3793 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:52,932 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:52,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:52,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:54,153 INFO L124 PetriNetUnfolderBase]: 4058/6129 cut-off events. [2024-06-27 19:52:54,153 INFO L125 PetriNetUnfolderBase]: For 885178/885180 co-relation queries the response was YES. [2024-06-27 19:52:54,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54954 conditions, 6129 events. 4058/6129 cut-off events. For 885178/885180 co-relation queries the response was YES. Maximal size of possible extension queue 284. Compared 33109 event pairs, 996 based on Foata normal form. 3/6132 useless extension candidates. Maximal degree in co-relation 54825. Up to 6095 conditions per place. [2024-06-27 19:52:54,225 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 319 selfloop transitions, 19 changer transitions 0/341 dead transitions. [2024-06-27 19:52:54,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 341 transitions, 4493 flow [2024-06-27 19:52:54,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:54,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:54,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-27 19:52:54,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3741496598639456 [2024-06-27 19:52:54,226 INFO L175 Difference]: Start difference. First operand has 265 places, 331 transitions, 3793 flow. Second operand 7 states and 110 transitions. [2024-06-27 19:52:54,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 341 transitions, 4493 flow [2024-06-27 19:52:55,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 341 transitions, 4334 flow, removed 58 selfloop flow, removed 7 redundant places. [2024-06-27 19:52:55,362 INFO L231 Difference]: Finished difference. Result has 265 places, 331 transitions, 3678 flow [2024-06-27 19:52:55,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3634, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3678, PETRI_PLACES=265, PETRI_TRANSITIONS=331} [2024-06-27 19:52:55,362 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 222 predicate places. [2024-06-27 19:52:55,363 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 331 transitions, 3678 flow [2024-06-27 19:52:55,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:55,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:55,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:55,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-27 19:52:55,363 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:55,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:55,364 INFO L85 PathProgramCache]: Analyzing trace with hash 51993842, now seen corresponding path program 6 times [2024-06-27 19:52:55,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:55,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773554584] [2024-06-27 19:52:55,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:55,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:55,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:56,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:56,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:56,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773554584] [2024-06-27 19:52:56,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [773554584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:56,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:56,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-27 19:52:56,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512378740] [2024-06-27 19:52:56,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:56,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-27 19:52:56,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:56,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-27 19:52:56,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-27 19:52:56,131 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:56,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 331 transitions, 3678 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:56,131 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:56,131 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:56,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:52:57,390 INFO L124 PetriNetUnfolderBase]: 4050/6118 cut-off events. [2024-06-27 19:52:57,390 INFO L125 PetriNetUnfolderBase]: For 903071/903073 co-relation queries the response was YES. [2024-06-27 19:52:57,435 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54677 conditions, 6118 events. 4050/6118 cut-off events. For 903071/903073 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 33027 event pairs, 993 based on Foata normal form. 4/6122 useless extension candidates. Maximal degree in co-relation 54546. Up to 6062 conditions per place. [2024-06-27 19:52:57,457 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 309 selfloop transitions, 29 changer transitions 0/341 dead transitions. [2024-06-27 19:52:57,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 341 transitions, 4378 flow [2024-06-27 19:52:57,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-27 19:52:57,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-27 19:52:57,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-27 19:52:57,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-27 19:52:57,459 INFO L175 Difference]: Start difference. First operand has 265 places, 331 transitions, 3678 flow. Second operand 7 states and 113 transitions. [2024-06-27 19:52:57,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 341 transitions, 4378 flow [2024-06-27 19:52:58,537 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 265 places, 341 transitions, 4306 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-27 19:52:58,541 INFO L231 Difference]: Finished difference. Result has 266 places, 331 transitions, 3672 flow [2024-06-27 19:52:58,541 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3606, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3672, PETRI_PLACES=266, PETRI_TRANSITIONS=331} [2024-06-27 19:52:58,541 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 223 predicate places. [2024-06-27 19:52:58,541 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 331 transitions, 3672 flow [2024-06-27 19:52:58,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:52:58,542 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:52:58,542 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:52:58,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-27 19:52:58,542 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:52:58,542 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:52:58,542 INFO L85 PathProgramCache]: Analyzing trace with hash 52405956, now seen corresponding path program 4 times [2024-06-27 19:52:58,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:52:58,543 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959619574] [2024-06-27 19:52:58,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:52:58,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:52:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:52:59,146 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:52:59,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:52:59,146 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959619574] [2024-06-27 19:52:59,147 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959619574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:52:59,147 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:52:59,147 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:52:59,147 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605590117] [2024-06-27 19:52:59,147 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:52:59,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:52:59,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:52:59,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:52:59,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:52:59,221 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:52:59,221 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 331 transitions, 3672 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:52:59,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:52:59,222 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:52:59,222 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:00,463 INFO L124 PetriNetUnfolderBase]: 4134/6235 cut-off events. [2024-06-27 19:53:00,463 INFO L125 PetriNetUnfolderBase]: For 955193/955195 co-relation queries the response was YES. [2024-06-27 19:53:00,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56281 conditions, 6235 events. 4134/6235 cut-off events. For 955193/955195 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33733 event pairs, 1001 based on Foata normal form. 8/6243 useless extension candidates. Maximal degree in co-relation 56149. Up to 6110 conditions per place. [2024-06-27 19:53:00,548 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 318 selfloop transitions, 34 changer transitions 0/355 dead transitions. [2024-06-27 19:53:00,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 355 transitions, 4725 flow [2024-06-27 19:53:00,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:00,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:00,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 19:53:00,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 19:53:00,550 INFO L175 Difference]: Start difference. First operand has 266 places, 331 transitions, 3672 flow. Second operand 8 states and 131 transitions. [2024-06-27 19:53:00,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 355 transitions, 4725 flow [2024-06-27 19:53:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 355 transitions, 4638 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:01,848 INFO L231 Difference]: Finished difference. Result has 268 places, 339 transitions, 3833 flow [2024-06-27 19:53:01,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3585, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=331, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3833, PETRI_PLACES=268, PETRI_TRANSITIONS=339} [2024-06-27 19:53:01,849 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 225 predicate places. [2024-06-27 19:53:01,849 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 339 transitions, 3833 flow [2024-06-27 19:53:01,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:01,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:01,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:01,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-27 19:53:01,849 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)] === [2024-06-27 19:53:01,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:01,850 INFO L85 PathProgramCache]: Analyzing trace with hash 52420340, now seen corresponding path program 1 times [2024-06-27 19:53:01,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:01,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230372385] [2024-06-27 19:53:01,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:01,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:01,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:02,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:02,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:02,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230372385] [2024-06-27 19:53:02,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230372385] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:02,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:02,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:02,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541858246] [2024-06-27 19:53:02,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:02,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:02,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:02,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:02,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:02,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:53:02,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 339 transitions, 3833 flow. Second operand has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:02,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:02,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:53:02,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:03,909 INFO L124 PetriNetUnfolderBase]: 3979/6067 cut-off events. [2024-06-27 19:53:03,910 INFO L125 PetriNetUnfolderBase]: For 960261/960261 co-relation queries the response was YES. [2024-06-27 19:53:03,964 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55341 conditions, 6067 events. 3979/6067 cut-off events. For 960261/960261 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33347 event pairs, 973 based on Foata normal form. 2/6055 useless extension candidates. Maximal degree in co-relation 55207. Up to 5809 conditions per place. [2024-06-27 19:53:03,989 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 294 selfloop transitions, 17 changer transitions 0/355 dead transitions. [2024-06-27 19:53:03,990 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 355 transitions, 4551 flow [2024-06-27 19:53:03,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:03,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:03,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:53:03,991 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 19:53:03,991 INFO L175 Difference]: Start difference. First operand has 268 places, 339 transitions, 3833 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:53:03,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 355 transitions, 4551 flow [2024-06-27 19:53:05,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 355 transitions, 4424 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-27 19:53:05,526 INFO L231 Difference]: Finished difference. Result has 271 places, 342 transitions, 3818 flow [2024-06-27 19:53:05,527 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3706, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=322, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3818, PETRI_PLACES=271, PETRI_TRANSITIONS=342} [2024-06-27 19:53:05,527 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-27 19:53:05,527 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 342 transitions, 3818 flow [2024-06-27 19:53:05,527 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.666666666666666) internal successors, (96), 9 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:53:05,527 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:05,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:05,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-27 19:53:05,528 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)] === [2024-06-27 19:53:05,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:05,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2086260606, now seen corresponding path program 5 times [2024-06-27 19:53:05,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:05,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370956706] [2024-06-27 19:53:05,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:05,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:05,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:06,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:06,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:06,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370956706] [2024-06-27 19:53:06,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370956706] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:06,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:06,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:06,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242389206] [2024-06-27 19:53:06,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:06,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:06,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:06,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:06,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:06,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:06,277 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 342 transitions, 3818 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:06,277 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:06,277 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:06,277 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:07,493 INFO L124 PetriNetUnfolderBase]: 4158/6269 cut-off events. [2024-06-27 19:53:07,493 INFO L125 PetriNetUnfolderBase]: For 996047/996049 co-relation queries the response was YES. [2024-06-27 19:53:07,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57028 conditions, 6269 events. 4158/6269 cut-off events. For 996047/996049 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33913 event pairs, 985 based on Foata normal form. 8/6277 useless extension candidates. Maximal degree in co-relation 56894. Up to 6000 conditions per place. [2024-06-27 19:53:07,576 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 305 selfloop transitions, 57 changer transitions 0/365 dead transitions. [2024-06-27 19:53:07,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 278 places, 365 transitions, 4998 flow [2024-06-27 19:53:07,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:07,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:07,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:53:07,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 19:53:07,577 INFO L175 Difference]: Start difference. First operand has 271 places, 342 transitions, 3818 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:53:07,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 278 places, 365 transitions, 4998 flow [2024-06-27 19:53:09,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 365 transitions, 4902 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 19:53:09,420 INFO L231 Difference]: Finished difference. Result has 273 places, 346 transitions, 3917 flow [2024-06-27 19:53:09,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3722, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=289, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3917, PETRI_PLACES=273, PETRI_TRANSITIONS=346} [2024-06-27 19:53:09,420 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-27 19:53:09,420 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 346 transitions, 3917 flow [2024-06-27 19:53:09,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:09,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:09,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:09,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-27 19:53:09,421 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)] === [2024-06-27 19:53:09,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:09,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1279664304, now seen corresponding path program 4 times [2024-06-27 19:53:09,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:09,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268579269] [2024-06-27 19:53:09,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:09,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:09,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:10,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:10,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:10,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268579269] [2024-06-27 19:53:10,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268579269] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:10,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:10,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:10,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069483002] [2024-06-27 19:53:10,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:10,116 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:10,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:10,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:10,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:10,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:10,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 346 transitions, 3917 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:10,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:10,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:10,172 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:11,349 INFO L124 PetriNetUnfolderBase]: 4152/6261 cut-off events. [2024-06-27 19:53:11,350 INFO L125 PetriNetUnfolderBase]: For 999837/999839 co-relation queries the response was YES. [2024-06-27 19:53:11,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57236 conditions, 6261 events. 4152/6261 cut-off events. For 999837/999839 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 33848 event pairs, 1010 based on Foata normal form. 4/6265 useless extension candidates. Maximal degree in co-relation 57101. Up to 6199 conditions per place. [2024-06-27 19:53:11,426 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 319 selfloop transitions, 35 changer transitions 0/357 dead transitions. [2024-06-27 19:53:11,426 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 357 transitions, 4651 flow [2024-06-27 19:53:11,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:11,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:11,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-27 19:53:11,427 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-27 19:53:11,427 INFO L175 Difference]: Start difference. First operand has 273 places, 346 transitions, 3917 flow. Second operand 8 states and 126 transitions. [2024-06-27 19:53:11,427 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 357 transitions, 4651 flow [2024-06-27 19:53:13,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 357 transitions, 4386 flow, removed 50 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:13,061 INFO L231 Difference]: Finished difference. Result has 274 places, 346 transitions, 3729 flow [2024-06-27 19:53:13,061 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3652, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3729, PETRI_PLACES=274, PETRI_TRANSITIONS=346} [2024-06-27 19:53:13,062 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-27 19:53:13,062 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 346 transitions, 3729 flow [2024-06-27 19:53:13,062 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:13,062 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:13,062 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:13,062 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-27 19:53:13,062 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)] === [2024-06-27 19:53:13,063 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:13,063 INFO L85 PathProgramCache]: Analyzing trace with hash 2086272696, now seen corresponding path program 6 times [2024-06-27 19:53:13,063 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:13,063 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018047226] [2024-06-27 19:53:13,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:13,063 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:13,643 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:13,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:13,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018047226] [2024-06-27 19:53:13,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018047226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:13,644 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:13,644 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:13,644 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141765837] [2024-06-27 19:53:13,644 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:13,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:13,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:13,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:13,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:13,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:13,714 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 346 transitions, 3729 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:13,714 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:13,714 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:13,714 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:15,029 INFO L124 PetriNetUnfolderBase]: 4140/6246 cut-off events. [2024-06-27 19:53:15,030 INFO L125 PetriNetUnfolderBase]: For 1012071/1012073 co-relation queries the response was YES. [2024-06-27 19:53:15,075 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56084 conditions, 6246 events. 4140/6246 cut-off events. For 1012071/1012073 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33813 event pairs, 993 based on Foata normal form. 8/6254 useless extension candidates. Maximal degree in co-relation 55949. Up to 5988 conditions per place. [2024-06-27 19:53:15,095 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 310 selfloop transitions, 52 changer transitions 0/365 dead transitions. [2024-06-27 19:53:15,096 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 365 transitions, 4837 flow [2024-06-27 19:53:15,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:15,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:15,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:53:15,097 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 19:53:15,097 INFO L175 Difference]: Start difference. First operand has 274 places, 346 transitions, 3729 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:53:15,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 365 transitions, 4837 flow [2024-06-27 19:53:16,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 365 transitions, 4700 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:16,613 INFO L231 Difference]: Finished difference. Result has 275 places, 346 transitions, 3704 flow [2024-06-27 19:53:16,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3592, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3704, PETRI_PLACES=275, PETRI_TRANSITIONS=346} [2024-06-27 19:53:16,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 19:53:16,614 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 346 transitions, 3704 flow [2024-06-27 19:53:16,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:16,615 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:16,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:16,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-27 19:53:16,615 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)] === [2024-06-27 19:53:16,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:16,616 INFO L85 PathProgramCache]: Analyzing trace with hash 203924688, now seen corresponding path program 1 times [2024-06-27 19:53:16,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:16,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493557041] [2024-06-27 19:53:16,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:16,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:16,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:17,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:17,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:17,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493557041] [2024-06-27 19:53:17,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493557041] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:17,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:17,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:17,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578931567] [2024-06-27 19:53:17,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:17,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:17,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:17,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:17,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:17,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:17,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 346 transitions, 3704 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:17,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:17,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:17,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:18,684 INFO L124 PetriNetUnfolderBase]: 4150/6259 cut-off events. [2024-06-27 19:53:18,684 INFO L125 PetriNetUnfolderBase]: For 1022673/1022673 co-relation queries the response was YES. [2024-06-27 19:53:18,741 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56495 conditions, 6259 events. 4150/6259 cut-off events. For 1022673/1022673 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 33850 event pairs, 998 based on Foata normal form. 2/6261 useless extension candidates. Maximal degree in co-relation 56359. Up to 6203 conditions per place. [2024-06-27 19:53:18,766 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 348 selfloop transitions, 19 changer transitions 0/370 dead transitions. [2024-06-27 19:53:18,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 370 transitions, 4532 flow [2024-06-27 19:53:18,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:18,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:18,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-27 19:53:18,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-27 19:53:18,769 INFO L175 Difference]: Start difference. First operand has 275 places, 346 transitions, 3704 flow. Second operand 8 states and 131 transitions. [2024-06-27 19:53:18,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 370 transitions, 4532 flow [2024-06-27 19:53:20,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 370 transitions, 4342 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 19:53:20,798 INFO L231 Difference]: Finished difference. Result has 275 places, 349 transitions, 3605 flow [2024-06-27 19:53:20,798 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3514, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3605, PETRI_PLACES=275, PETRI_TRANSITIONS=349} [2024-06-27 19:53:20,799 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-27 19:53:20,799 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 349 transitions, 3605 flow [2024-06-27 19:53:20,799 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:20,799 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:20,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:20,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-27 19:53:20,800 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)] === [2024-06-27 19:53:20,800 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:20,800 INFO L85 PathProgramCache]: Analyzing trace with hash 905098028, now seen corresponding path program 1 times [2024-06-27 19:53:20,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:20,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564872297] [2024-06-27 19:53:20,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:20,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:20,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:21,449 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:21,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:21,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564872297] [2024-06-27 19:53:21,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564872297] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:21,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:21,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:21,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955839755] [2024-06-27 19:53:21,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:21,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:21,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:21,450 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:21,450 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:21,505 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:21,505 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 349 transitions, 3605 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:21,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:21,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:21,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:23,021 INFO L124 PetriNetUnfolderBase]: 4165/6280 cut-off events. [2024-06-27 19:53:23,022 INFO L125 PetriNetUnfolderBase]: For 1046640/1046640 co-relation queries the response was YES. [2024-06-27 19:53:23,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56790 conditions, 6280 events. 4165/6280 cut-off events. For 1046640/1046640 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 33947 event pairs, 996 based on Foata normal form. 3/6283 useless extension candidates. Maximal degree in co-relation 56655. Up to 6149 conditions per place. [2024-06-27 19:53:23,103 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 328 selfloop transitions, 48 changer transitions 0/379 dead transitions. [2024-06-27 19:53:23,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 379 transitions, 4681 flow [2024-06-27 19:53:23,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:23,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:23,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-27 19:53:23,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-27 19:53:23,104 INFO L175 Difference]: Start difference. First operand has 275 places, 349 transitions, 3605 flow. Second operand 8 states and 141 transitions. [2024-06-27 19:53:23,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 379 transitions, 4681 flow [2024-06-27 19:53:24,749 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 379 transitions, 4614 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-27 19:53:24,753 INFO L231 Difference]: Finished difference. Result has 277 places, 355 transitions, 3738 flow [2024-06-27 19:53:24,753 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=304, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3738, PETRI_PLACES=277, PETRI_TRANSITIONS=355} [2024-06-27 19:53:24,753 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 234 predicate places. [2024-06-27 19:53:24,754 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 355 transitions, 3738 flow [2024-06-27 19:53:24,754 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:24,754 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:24,754 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:24,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-27 19:53:24,754 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)] === [2024-06-27 19:53:24,754 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash 905097842, now seen corresponding path program 2 times [2024-06-27 19:53:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:24,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621523955] [2024-06-27 19:53:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:24,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:24,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:25,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:25,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:25,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621523955] [2024-06-27 19:53:25,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1621523955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:25,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:25,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:25,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347262444] [2024-06-27 19:53:25,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:25,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:25,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:25,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:25,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:25,499 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:25,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 355 transitions, 3738 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:25,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:25,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:25,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:26,945 INFO L124 PetriNetUnfolderBase]: 4175/6294 cut-off events. [2024-06-27 19:53:26,945 INFO L125 PetriNetUnfolderBase]: For 1068816/1068816 co-relation queries the response was YES. [2024-06-27 19:53:27,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57621 conditions, 6294 events. 4175/6294 cut-off events. For 1068816/1068816 co-relation queries the response was YES. Maximal size of possible extension queue 293. Compared 34054 event pairs, 994 based on Foata normal form. 2/6296 useless extension candidates. Maximal degree in co-relation 57485. Up to 6203 conditions per place. [2024-06-27 19:53:27,025 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 38 changer transitions 0/382 dead transitions. [2024-06-27 19:53:27,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 382 transitions, 4822 flow [2024-06-27 19:53:27,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:27,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:27,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 19:53:27,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 19:53:27,027 INFO L175 Difference]: Start difference. First operand has 277 places, 355 transitions, 3738 flow. Second operand 8 states and 135 transitions. [2024-06-27 19:53:27,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 382 transitions, 4822 flow [2024-06-27 19:53:28,459 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 382 transitions, 4721 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-27 19:53:28,480 INFO L231 Difference]: Finished difference. Result has 281 places, 361 transitions, 3821 flow [2024-06-27 19:53:28,488 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=355, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3821, PETRI_PLACES=281, PETRI_TRANSITIONS=361} [2024-06-27 19:53:28,488 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 238 predicate places. [2024-06-27 19:53:28,488 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 361 transitions, 3821 flow [2024-06-27 19:53:28,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:28,488 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:28,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:28,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-27 19:53:28,489 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)] === [2024-06-27 19:53:28,489 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:28,489 INFO L85 PathProgramCache]: Analyzing trace with hash 909746168, now seen corresponding path program 2 times [2024-06-27 19:53:28,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:28,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825606422] [2024-06-27 19:53:28,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:28,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:28,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:29,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:29,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:29,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825606422] [2024-06-27 19:53:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825606422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:29,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:29,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659948617] [2024-06-27 19:53:29,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:29,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:29,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:29,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:29,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:29,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:29,258 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 361 transitions, 3821 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:29,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:29,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:29,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:30,921 INFO L124 PetriNetUnfolderBase]: 4214/6348 cut-off events. [2024-06-27 19:53:30,921 INFO L125 PetriNetUnfolderBase]: For 1109806/1109806 co-relation queries the response was YES. [2024-06-27 19:53:30,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58747 conditions, 6348 events. 4214/6348 cut-off events. For 1109806/1109806 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 34369 event pairs, 990 based on Foata normal form. 3/6351 useless extension candidates. Maximal degree in co-relation 58609. Up to 6198 conditions per place. [2024-06-27 19:53:30,994 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 338 selfloop transitions, 50 changer transitions 0/391 dead transitions. [2024-06-27 19:53:30,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 391 transitions, 5078 flow [2024-06-27 19:53:30,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:30,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:30,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 19:53:30,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 19:53:30,995 INFO L175 Difference]: Start difference. First operand has 281 places, 361 transitions, 3821 flow. Second operand 8 states and 140 transitions. [2024-06-27 19:53:30,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 391 transitions, 5078 flow [2024-06-27 19:53:33,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 391 transitions, 4997 flow, removed 27 selfloop flow, removed 4 redundant places. [2024-06-27 19:53:33,216 INFO L231 Difference]: Finished difference. Result has 285 places, 367 transitions, 3911 flow [2024-06-27 19:53:33,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3740, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=361, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3911, PETRI_PLACES=285, PETRI_TRANSITIONS=367} [2024-06-27 19:53:33,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 242 predicate places. [2024-06-27 19:53:33,217 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 367 transitions, 3911 flow [2024-06-27 19:53:33,217 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:33,217 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:33,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:33,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-27 19:53:33,218 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)] === [2024-06-27 19:53:33,218 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:33,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1698782314, now seen corresponding path program 3 times [2024-06-27 19:53:33,218 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:33,218 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794028982] [2024-06-27 19:53:33,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:33,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:33,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:33,825 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:33,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:33,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794028982] [2024-06-27 19:53:33,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794028982] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:33,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:33,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:33,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631864085] [2024-06-27 19:53:33,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:33,826 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:33,826 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:33,826 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:33,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:33,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:33,927 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 367 transitions, 3911 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:33,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:33,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:33,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:35,385 INFO L124 PetriNetUnfolderBase]: 4205/6336 cut-off events. [2024-06-27 19:53:35,385 INFO L125 PetriNetUnfolderBase]: For 1121426/1121426 co-relation queries the response was YES. [2024-06-27 19:53:35,444 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58745 conditions, 6336 events. 4205/6336 cut-off events. For 1121426/1121426 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 34283 event pairs, 998 based on Foata normal form. 3/6339 useless extension candidates. Maximal degree in co-relation 58605. Up to 6191 conditions per place. [2024-06-27 19:53:35,470 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 340 selfloop transitions, 49 changer transitions 0/392 dead transitions. [2024-06-27 19:53:35,470 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 392 transitions, 4936 flow [2024-06-27 19:53:35,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:35,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:35,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-27 19:53:35,471 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-27 19:53:35,471 INFO L175 Difference]: Start difference. First operand has 285 places, 367 transitions, 3911 flow. Second operand 8 states and 142 transitions. [2024-06-27 19:53:35,471 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 392 transitions, 4936 flow [2024-06-27 19:53:37,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 288 places, 392 transitions, 4836 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-27 19:53:37,716 INFO L231 Difference]: Finished difference. Result has 289 places, 367 transitions, 3915 flow [2024-06-27 19:53:37,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3811, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3915, PETRI_PLACES=289, PETRI_TRANSITIONS=367} [2024-06-27 19:53:37,717 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-27 19:53:37,717 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 367 transitions, 3915 flow [2024-06-27 19:53:37,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:37,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:37,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:37,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-27 19:53:37,717 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)] === [2024-06-27 19:53:37,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:37,718 INFO L85 PathProgramCache]: Analyzing trace with hash 909739472, now seen corresponding path program 3 times [2024-06-27 19:53:37,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:37,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216200444] [2024-06-27 19:53:37,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:37,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:37,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:38,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:38,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216200444] [2024-06-27 19:53:38,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216200444] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:38,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:38,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:38,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76273763] [2024-06-27 19:53:38,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:38,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:38,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:38,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:38,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:38,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:38,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 367 transitions, 3915 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:38,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:38,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:38,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:39,766 INFO L124 PetriNetUnfolderBase]: 4215/6350 cut-off events. [2024-06-27 19:53:39,766 INFO L125 PetriNetUnfolderBase]: For 1140997/1140997 co-relation queries the response was YES. [2024-06-27 19:53:39,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59035 conditions, 6350 events. 4215/6350 cut-off events. For 1140997/1140997 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 34359 event pairs, 992 based on Foata normal form. 2/6352 useless extension candidates. Maximal degree in co-relation 58894. Up to 6255 conditions per place. [2024-06-27 19:53:39,854 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 345 selfloop transitions, 40 changer transitions 0/388 dead transitions. [2024-06-27 19:53:39,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 388 transitions, 4955 flow [2024-06-27 19:53:39,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:39,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:39,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 19:53:39,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 19:53:39,855 INFO L175 Difference]: Start difference. First operand has 289 places, 367 transitions, 3915 flow. Second operand 8 states and 133 transitions. [2024-06-27 19:53:39,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 388 transitions, 4955 flow [2024-06-27 19:53:42,185 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 289 places, 388 transitions, 4847 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:42,189 INFO L231 Difference]: Finished difference. Result has 290 places, 370 transitions, 3935 flow [2024-06-27 19:53:42,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3807, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3935, PETRI_PLACES=290, PETRI_TRANSITIONS=370} [2024-06-27 19:53:42,190 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 247 predicate places. [2024-06-27 19:53:42,190 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 370 transitions, 3935 flow [2024-06-27 19:53:42,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:42,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:42,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:42,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-27 19:53:42,191 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)] === [2024-06-27 19:53:42,191 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:42,191 INFO L85 PathProgramCache]: Analyzing trace with hash 2089614170, now seen corresponding path program 4 times [2024-06-27 19:53:42,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:42,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994075819] [2024-06-27 19:53:42,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:42,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:42,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:42,820 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:42,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:42,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994075819] [2024-06-27 19:53:42,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994075819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:42,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:42,820 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:42,820 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693955803] [2024-06-27 19:53:42,820 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:42,828 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:42,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:42,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:42,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:42,938 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:42,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 370 transitions, 3935 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:42,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:42,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:42,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:44,497 INFO L124 PetriNetUnfolderBase]: 4254/6406 cut-off events. [2024-06-27 19:53:44,497 INFO L125 PetriNetUnfolderBase]: For 1182301/1182303 co-relation queries the response was YES. [2024-06-27 19:53:44,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59817 conditions, 6406 events. 4254/6406 cut-off events. For 1182301/1182303 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 34694 event pairs, 1000 based on Foata normal form. 5/6411 useless extension candidates. Maximal degree in co-relation 59675. Up to 6240 conditions per place. [2024-06-27 19:53:44,588 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 341 selfloop transitions, 55 changer transitions 0/399 dead transitions. [2024-06-27 19:53:44,588 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 399 transitions, 5229 flow [2024-06-27 19:53:44,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:44,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:44,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-27 19:53:44,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-27 19:53:44,597 INFO L175 Difference]: Start difference. First operand has 290 places, 370 transitions, 3935 flow. Second operand 8 states and 138 transitions. [2024-06-27 19:53:44,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 399 transitions, 5229 flow [2024-06-27 19:53:46,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 399 transitions, 5141 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-27 19:53:46,901 INFO L231 Difference]: Finished difference. Result has 293 places, 376 transitions, 4034 flow [2024-06-27 19:53:46,902 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3847, PETRI_DIFFERENCE_MINUEND_PLACES=285, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4034, PETRI_PLACES=293, PETRI_TRANSITIONS=376} [2024-06-27 19:53:46,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 250 predicate places. [2024-06-27 19:53:46,902 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 376 transitions, 4034 flow [2024-06-27 19:53:46,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:46,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:46,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:46,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-27 19:53:46,903 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)] === [2024-06-27 19:53:46,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:46,903 INFO L85 PathProgramCache]: Analyzing trace with hash -1265657574, now seen corresponding path program 5 times [2024-06-27 19:53:46,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:46,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789004489] [2024-06-27 19:53:46,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:46,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:46,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:47,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:47,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:47,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789004489] [2024-06-27 19:53:47,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789004489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:47,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:47,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:47,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443304273] [2024-06-27 19:53:47,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:47,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:47,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:47,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:47,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:47,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:47,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 376 transitions, 4034 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:47,615 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:47,615 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:47,615 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:49,167 INFO L124 PetriNetUnfolderBase]: 4245/6394 cut-off events. [2024-06-27 19:53:49,167 INFO L125 PetriNetUnfolderBase]: For 1194018/1194020 co-relation queries the response was YES. [2024-06-27 19:53:49,220 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59789 conditions, 6394 events. 4245/6394 cut-off events. For 1194018/1194020 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 34597 event pairs, 990 based on Foata normal form. 5/6399 useless extension candidates. Maximal degree in co-relation 59646. Up to 6233 conditions per place. [2024-06-27 19:53:49,242 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 333 selfloop transitions, 58 changer transitions 0/394 dead transitions. [2024-06-27 19:53:49,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 394 transitions, 5049 flow [2024-06-27 19:53:49,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:49,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 19:53:49,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 19:53:49,244 INFO L175 Difference]: Start difference. First operand has 293 places, 376 transitions, 4034 flow. Second operand 8 states and 133 transitions. [2024-06-27 19:53:49,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 394 transitions, 5049 flow [2024-06-27 19:53:51,347 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 394 transitions, 4901 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-27 19:53:51,352 INFO L231 Difference]: Finished difference. Result has 296 places, 376 transitions, 4009 flow [2024-06-27 19:53:51,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3886, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4009, PETRI_PLACES=296, PETRI_TRANSITIONS=376} [2024-06-27 19:53:51,352 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-27 19:53:51,352 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 376 transitions, 4009 flow [2024-06-27 19:53:51,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:51,353 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:51,353 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:51,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-27 19:53:51,353 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)] === [2024-06-27 19:53:51,353 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:51,353 INFO L85 PathProgramCache]: Analyzing trace with hash -1273938480, now seen corresponding path program 4 times [2024-06-27 19:53:51,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:51,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654693219] [2024-06-27 19:53:51,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:51,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:51,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:51,966 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:51,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:51,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654693219] [2024-06-27 19:53:51,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654693219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:51,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:51,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:51,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268170175] [2024-06-27 19:53:51,967 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:51,967 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:51,967 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:51,968 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:51,968 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:52,062 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:52,062 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 376 transitions, 4009 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:52,062 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:52,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:52,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:53,525 INFO L124 PetriNetUnfolderBase]: 4239/6386 cut-off events. [2024-06-27 19:53:53,525 INFO L125 PetriNetUnfolderBase]: For 1205177/1205179 co-relation queries the response was YES. [2024-06-27 19:53:53,589 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59735 conditions, 6386 events. 4239/6386 cut-off events. For 1205177/1205179 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34580 event pairs, 1016 based on Foata normal form. 2/6388 useless extension candidates. Maximal degree in co-relation 59591. Up to 6292 conditions per place. [2024-06-27 19:53:53,618 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 346 selfloop transitions, 40 changer transitions 0/389 dead transitions. [2024-06-27 19:53:53,618 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 389 transitions, 4815 flow [2024-06-27 19:53:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:53,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:53,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:53:53,619 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 19:53:53,619 INFO L175 Difference]: Start difference. First operand has 296 places, 376 transitions, 4009 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:53:53,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 389 transitions, 4815 flow [2024-06-27 19:53:56,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 389 transitions, 4670 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-27 19:53:56,274 INFO L231 Difference]: Finished difference. Result has 297 places, 376 transitions, 3950 flow [2024-06-27 19:53:56,274 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3864, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3950, PETRI_PLACES=297, PETRI_TRANSITIONS=376} [2024-06-27 19:53:56,274 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 19:53:56,275 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 376 transitions, 3950 flow [2024-06-27 19:53:56,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:56,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:53:56,275 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:53:56,275 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-27 19:53:56,275 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)] === [2024-06-27 19:53:56,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:53:56,275 INFO L85 PathProgramCache]: Analyzing trace with hash 2091986244, now seen corresponding path program 6 times [2024-06-27 19:53:56,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:53:56,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568294192] [2024-06-27 19:53:56,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:53:56,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:53:56,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:53:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:53:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:53:56,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568294192] [2024-06-27 19:53:56,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568294192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:53:56,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:53:56,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:53:56,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209602202] [2024-06-27 19:53:56,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:53:56,959 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:53:56,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:53:56,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:53:56,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:53:57,030 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:53:57,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 376 transitions, 3950 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:53:57,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:53:57,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:53:57,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:53:58,516 INFO L124 PetriNetUnfolderBase]: 4230/6374 cut-off events. [2024-06-27 19:53:58,516 INFO L125 PetriNetUnfolderBase]: For 1220475/1220477 co-relation queries the response was YES. [2024-06-27 19:53:58,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59549 conditions, 6374 events. 4230/6374 cut-off events. For 1220475/1220477 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 34476 event pairs, 985 based on Foata normal form. 5/6379 useless extension candidates. Maximal degree in co-relation 59404. Up to 6218 conditions per place. [2024-06-27 19:53:58,608 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 335 selfloop transitions, 57 changer transitions 0/395 dead transitions. [2024-06-27 19:53:58,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 395 transitions, 4787 flow [2024-06-27 19:53:58,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:53:58,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:53:58,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-27 19:53:58,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4017857142857143 [2024-06-27 19:53:58,609 INFO L175 Difference]: Start difference. First operand has 297 places, 376 transitions, 3950 flow. Second operand 8 states and 135 transitions. [2024-06-27 19:53:58,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 395 transitions, 4787 flow [2024-06-27 19:54:01,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 395 transitions, 4643 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-27 19:54:01,372 INFO L231 Difference]: Finished difference. Result has 297 places, 376 transitions, 3926 flow [2024-06-27 19:54:01,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3806, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3926, PETRI_PLACES=297, PETRI_TRANSITIONS=376} [2024-06-27 19:54:01,372 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 19:54:01,372 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 376 transitions, 3926 flow [2024-06-27 19:54:01,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:01,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:01,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:01,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-27 19:54:01,373 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)] === [2024-06-27 19:54:01,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:01,373 INFO L85 PathProgramCache]: Analyzing trace with hash 2100574794, now seen corresponding path program 1 times [2024-06-27 19:54:01,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:01,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614971753] [2024-06-27 19:54:01,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:01,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:02,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:02,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:02,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614971753] [2024-06-27 19:54:02,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614971753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:02,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:02,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:02,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327410368] [2024-06-27 19:54:02,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:02,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:02,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:02,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:02,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:02,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:54:02,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 376 transitions, 3926 flow. Second operand has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:02,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:02,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:54:02,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:03,856 INFO L124 PetriNetUnfolderBase]: 4074/6204 cut-off events. [2024-06-27 19:54:03,856 INFO L125 PetriNetUnfolderBase]: For 1229520/1229520 co-relation queries the response was YES. [2024-06-27 19:54:03,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58470 conditions, 6204 events. 4074/6204 cut-off events. For 1229520/1229520 co-relation queries the response was YES. Maximal size of possible extension queue 299. Compared 34002 event pairs, 977 based on Foata normal form. 2/6192 useless extension candidates. Maximal degree in co-relation 58324. Up to 5938 conditions per place. [2024-06-27 19:54:03,941 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 330 selfloop transitions, 16 changer transitions 0/391 dead transitions. [2024-06-27 19:54:03,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 391 transitions, 4700 flow [2024-06-27 19:54:03,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:03,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:03,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-27 19:54:03,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 19:54:03,942 INFO L175 Difference]: Start difference. First operand has 297 places, 376 transitions, 3926 flow. Second operand 8 states and 128 transitions. [2024-06-27 19:54:03,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 391 transitions, 4700 flow [2024-06-27 19:54:06,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 391 transitions, 4549 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-27 19:54:06,984 INFO L231 Difference]: Finished difference. Result has 297 places, 378 transitions, 3868 flow [2024-06-27 19:54:06,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3775, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=376, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3868, PETRI_PLACES=297, PETRI_TRANSITIONS=378} [2024-06-27 19:54:06,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 254 predicate places. [2024-06-27 19:54:06,985 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 378 transitions, 3868 flow [2024-06-27 19:54:06,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 10.6) internal successors, (106), 10 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:06,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:06,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:06,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-27 19:54:06,986 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)] === [2024-06-27 19:54:06,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:06,986 INFO L85 PathProgramCache]: Analyzing trace with hash -790056020, now seen corresponding path program 1 times [2024-06-27 19:54:06,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:06,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194064623] [2024-06-27 19:54:06,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:06,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:06,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:07,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:07,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:07,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194064623] [2024-06-27 19:54:07,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194064623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:07,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:07,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:07,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138310900] [2024-06-27 19:54:07,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:07,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:07,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:07,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:07,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:08,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:08,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 378 transitions, 3868 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:08,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:08,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:08,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:09,665 INFO L124 PetriNetUnfolderBase]: 4254/6409 cut-off events. [2024-06-27 19:54:09,665 INFO L125 PetriNetUnfolderBase]: For 1276079/1276081 co-relation queries the response was YES. [2024-06-27 19:54:09,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60356 conditions, 6409 events. 4254/6409 cut-off events. For 1276079/1276081 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 34635 event pairs, 823 based on Foata normal form. 6/6415 useless extension candidates. Maximal degree in co-relation 60209. Up to 6104 conditions per place. [2024-06-27 19:54:09,741 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 330 selfloop transitions, 87 changer transitions 0/420 dead transitions. [2024-06-27 19:54:09,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 420 transitions, 5124 flow [2024-06-27 19:54:09,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:09,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:09,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-27 19:54:09,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-27 19:54:09,743 INFO L175 Difference]: Start difference. First operand has 297 places, 378 transitions, 3868 flow. Second operand 9 states and 166 transitions. [2024-06-27 19:54:09,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 420 transitions, 5124 flow [2024-06-27 19:54:12,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 420 transitions, 5047 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-27 19:54:12,215 INFO L231 Difference]: Finished difference. Result has 300 places, 384 transitions, 4117 flow [2024-06-27 19:54:12,216 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3791, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4117, PETRI_PLACES=300, PETRI_TRANSITIONS=384} [2024-06-27 19:54:12,216 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 257 predicate places. [2024-06-27 19:54:12,216 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 384 transitions, 4117 flow [2024-06-27 19:54:12,216 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:12,216 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:12,217 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:12,217 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-27 19:54:12,217 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)] === [2024-06-27 19:54:12,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:12,217 INFO L85 PathProgramCache]: Analyzing trace with hash 1789235599, now seen corresponding path program 1 times [2024-06-27 19:54:12,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:12,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605756556] [2024-06-27 19:54:12,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:12,218 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:13,033 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:13,033 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605756556] [2024-06-27 19:54:13,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605756556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:13,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:13,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:13,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451234492] [2024-06-27 19:54:13,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:13,034 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:13,128 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:13,128 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 384 transitions, 4117 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:13,128 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:13,128 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:13,128 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:14,628 INFO L124 PetriNetUnfolderBase]: 4324/6506 cut-off events. [2024-06-27 19:54:14,628 INFO L125 PetriNetUnfolderBase]: For 1337692/1337694 co-relation queries the response was YES. [2024-06-27 19:54:14,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62261 conditions, 6506 events. 4324/6506 cut-off events. For 1337692/1337694 co-relation queries the response was YES. Maximal size of possible extension queue 309. Compared 35319 event pairs, 980 based on Foata normal form. 8/6514 useless extension candidates. Maximal degree in co-relation 62113. Up to 5834 conditions per place. [2024-06-27 19:54:14,720 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 307 selfloop transitions, 126 changer transitions 0/436 dead transitions. [2024-06-27 19:54:14,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 436 transitions, 5645 flow [2024-06-27 19:54:14,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:54:14,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:54:14,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 203 transitions. [2024-06-27 19:54:14,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4393939393939394 [2024-06-27 19:54:14,721 INFO L175 Difference]: Start difference. First operand has 300 places, 384 transitions, 4117 flow. Second operand 11 states and 203 transitions. [2024-06-27 19:54:14,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 436 transitions, 5645 flow [2024-06-27 19:54:16,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 436 transitions, 5444 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:16,821 INFO L231 Difference]: Finished difference. Result has 307 places, 394 transitions, 4381 flow [2024-06-27 19:54:16,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3916, PETRI_DIFFERENCE_MINUEND_PLACES=295, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=263, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=4381, PETRI_PLACES=307, PETRI_TRANSITIONS=394} [2024-06-27 19:54:16,822 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 264 predicate places. [2024-06-27 19:54:16,822 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 394 transitions, 4381 flow [2024-06-27 19:54:16,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:16,822 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:16,822 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:16,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-27 19:54:16,822 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)] === [2024-06-27 19:54:16,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:16,823 INFO L85 PathProgramCache]: Analyzing trace with hash -789787250, now seen corresponding path program 2 times [2024-06-27 19:54:16,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:16,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306411157] [2024-06-27 19:54:16,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:16,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:16,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:17,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:17,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:17,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306411157] [2024-06-27 19:54:17,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1306411157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:17,737 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:17,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:17,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213672419] [2024-06-27 19:54:17,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:17,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:17,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:17,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:17,833 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:17,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 394 transitions, 4381 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:17,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:17,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:17,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:19,212 INFO L124 PetriNetUnfolderBase]: 4340/6530 cut-off events. [2024-06-27 19:54:19,212 INFO L125 PetriNetUnfolderBase]: For 1354429/1354431 co-relation queries the response was YES. [2024-06-27 19:54:19,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63851 conditions, 6530 events. 4340/6530 cut-off events. For 1354429/1354431 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 35443 event pairs, 1014 based on Foata normal form. 6/6536 useless extension candidates. Maximal degree in co-relation 63700. Up to 6307 conditions per place. [2024-06-27 19:54:19,313 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 343 selfloop transitions, 82 changer transitions 0/428 dead transitions. [2024-06-27 19:54:19,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 315 places, 428 transitions, 5351 flow [2024-06-27 19:54:19,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:19,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:19,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-27 19:54:19,314 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-27 19:54:19,314 INFO L175 Difference]: Start difference. First operand has 307 places, 394 transitions, 4381 flow. Second operand 9 states and 161 transitions. [2024-06-27 19:54:19,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 315 places, 428 transitions, 5351 flow [2024-06-27 19:54:22,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 428 transitions, 5102 flow, removed 51 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:22,425 INFO L231 Difference]: Finished difference. Result has 309 places, 397 transitions, 4350 flow [2024-06-27 19:54:22,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4132, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=394, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4350, PETRI_PLACES=309, PETRI_TRANSITIONS=397} [2024-06-27 19:54:22,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-27 19:54:22,426 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 397 transitions, 4350 flow [2024-06-27 19:54:22,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:22,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:22,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:22,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-27 19:54:22,426 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)] === [2024-06-27 19:54:22,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:22,427 INFO L85 PathProgramCache]: Analyzing trace with hash 1798489688, now seen corresponding path program 3 times [2024-06-27 19:54:22,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:22,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653780045] [2024-06-27 19:54:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:22,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:22,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:23,311 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:23,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:23,311 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653780045] [2024-06-27 19:54:23,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653780045] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:23,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:23,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:54:23,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794137117] [2024-06-27 19:54:23,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:23,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:54:23,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:23,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:54:23,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:54:23,395 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:23,395 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 397 transitions, 4350 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:23,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:23,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:23,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:24,769 INFO L124 PetriNetUnfolderBase]: 4356/6554 cut-off events. [2024-06-27 19:54:24,769 INFO L125 PetriNetUnfolderBase]: For 1378485/1378487 co-relation queries the response was YES. [2024-06-27 19:54:24,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64077 conditions, 6554 events. 4356/6554 cut-off events. For 1378485/1378487 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 35656 event pairs, 1014 based on Foata normal form. 6/6560 useless extension candidates. Maximal degree in co-relation 63924. Up to 6373 conditions per place. [2024-06-27 19:54:24,864 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 355 selfloop transitions, 67 changer transitions 0/425 dead transitions. [2024-06-27 19:54:24,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 425 transitions, 5304 flow [2024-06-27 19:54:24,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:54:24,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:54:24,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 19:54:24,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 19:54:24,865 INFO L175 Difference]: Start difference. First operand has 309 places, 397 transitions, 4350 flow. Second operand 9 states and 154 transitions. [2024-06-27 19:54:24,865 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 425 transitions, 5304 flow [2024-06-27 19:54:28,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 425 transitions, 5114 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:28,575 INFO L231 Difference]: Finished difference. Result has 311 places, 400 transitions, 4354 flow [2024-06-27 19:54:28,575 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4160, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4354, PETRI_PLACES=311, PETRI_TRANSITIONS=400} [2024-06-27 19:54:28,576 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 268 predicate places. [2024-06-27 19:54:28,576 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 400 transitions, 4354 flow [2024-06-27 19:54:28,576 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:54:28,576 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:28,576 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:28,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-27 19:54:28,576 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)] === [2024-06-27 19:54:28,577 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:28,577 INFO L85 PathProgramCache]: Analyzing trace with hash -671726168, now seen corresponding path program 1 times [2024-06-27 19:54:28,577 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:28,577 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624886190] [2024-06-27 19:54:28,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:28,577 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:28,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:29,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:29,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:29,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624886190] [2024-06-27 19:54:29,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624886190] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:29,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:29,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:29,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361537446] [2024-06-27 19:54:29,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:29,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:29,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:29,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:29,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:29,254 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:29,255 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 400 transitions, 4354 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:29,255 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:29,255 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:29,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:30,667 INFO L124 PetriNetUnfolderBase]: 4382/6591 cut-off events. [2024-06-27 19:54:30,668 INFO L125 PetriNetUnfolderBase]: For 1405867/1405869 co-relation queries the response was YES. [2024-06-27 19:54:30,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64817 conditions, 6591 events. 4382/6591 cut-off events. For 1405867/1405869 co-relation queries the response was YES. Maximal size of possible extension queue 317. Compared 35821 event pairs, 1019 based on Foata normal form. 4/6595 useless extension candidates. Maximal degree in co-relation 64663. Up to 6273 conditions per place. [2024-06-27 19:54:30,753 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 357 selfloop transitions, 79 changer transitions 0/439 dead transitions. [2024-06-27 19:54:30,753 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 439 transitions, 5978 flow [2024-06-27 19:54:30,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:30,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:30,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 19:54:30,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 19:54:30,755 INFO L175 Difference]: Start difference. First operand has 311 places, 400 transitions, 4354 flow. Second operand 8 states and 146 transitions. [2024-06-27 19:54:30,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 439 transitions, 5978 flow [2024-06-27 19:54:33,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 439 transitions, 5812 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-27 19:54:33,613 INFO L231 Difference]: Finished difference. Result has 314 places, 412 transitions, 4671 flow [2024-06-27 19:54:33,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4188, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4671, PETRI_PLACES=314, PETRI_TRANSITIONS=412} [2024-06-27 19:54:33,616 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-27 19:54:33,616 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 412 transitions, 4671 flow [2024-06-27 19:54:33,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:33,616 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:33,616 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:33,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-27 19:54:33,617 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)] === [2024-06-27 19:54:33,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:33,617 INFO L85 PathProgramCache]: Analyzing trace with hash -472274431, now seen corresponding path program 1 times [2024-06-27 19:54:33,617 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:33,617 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557515853] [2024-06-27 19:54:33,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:33,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:34,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:34,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:34,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557515853] [2024-06-27 19:54:34,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [557515853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:34,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:34,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:34,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579611700] [2024-06-27 19:54:34,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:34,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:34,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:34,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:34,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:34,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:34,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 412 transitions, 4671 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:34,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:34,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:34,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:35,811 INFO L124 PetriNetUnfolderBase]: 4484/6731 cut-off events. [2024-06-27 19:54:35,811 INFO L125 PetriNetUnfolderBase]: For 1507604/1507606 co-relation queries the response was YES. [2024-06-27 19:54:35,884 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67873 conditions, 6731 events. 4484/6731 cut-off events. For 1507604/1507606 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 36618 event pairs, 992 based on Foata normal form. 8/6739 useless extension candidates. Maximal degree in co-relation 67716. Up to 6149 conditions per place. [2024-06-27 19:54:35,913 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 346 selfloop transitions, 104 changer transitions 0/453 dead transitions. [2024-06-27 19:54:35,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 453 transitions, 6291 flow [2024-06-27 19:54:35,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-27 19:54:35,914 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44345238095238093 [2024-06-27 19:54:35,915 INFO L175 Difference]: Start difference. First operand has 314 places, 412 transitions, 4671 flow. Second operand 8 states and 149 transitions. [2024-06-27 19:54:35,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 453 transitions, 6291 flow [2024-06-27 19:54:39,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 453 transitions, 6097 flow, removed 75 selfloop flow, removed 3 redundant places. [2024-06-27 19:54:39,961 INFO L231 Difference]: Finished difference. Result has 320 places, 425 transitions, 4968 flow [2024-06-27 19:54:39,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4477, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=412, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4968, PETRI_PLACES=320, PETRI_TRANSITIONS=425} [2024-06-27 19:54:39,962 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-27 19:54:39,962 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 425 transitions, 4968 flow [2024-06-27 19:54:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:39,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:39,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:39,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-27 19:54:39,962 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)] === [2024-06-27 19:54:39,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash -472274648, now seen corresponding path program 2 times [2024-06-27 19:54:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:39,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595122943] [2024-06-27 19:54:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:39,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:40,575 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:40,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:40,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595122943] [2024-06-27 19:54:40,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595122943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:40,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:40,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:40,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31873156] [2024-06-27 19:54:40,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:40,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:40,576 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:40,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:40,577 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:40,637 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:40,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 425 transitions, 4968 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:40,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:40,637 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:40,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:42,031 INFO L124 PetriNetUnfolderBase]: 4494/6746 cut-off events. [2024-06-27 19:54:42,032 INFO L125 PetriNetUnfolderBase]: For 1510723/1510725 co-relation queries the response was YES. [2024-06-27 19:54:42,104 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67923 conditions, 6746 events. 4494/6746 cut-off events. For 1510723/1510725 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 36740 event pairs, 1035 based on Foata normal form. 4/6750 useless extension candidates. Maximal degree in co-relation 67763. Up to 6424 conditions per place. [2024-06-27 19:54:42,134 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 369 selfloop transitions, 81 changer transitions 0/453 dead transitions. [2024-06-27 19:54:42,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 453 transitions, 6434 flow [2024-06-27 19:54:42,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:42,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:42,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-27 19:54:42,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 19:54:42,135 INFO L175 Difference]: Start difference. First operand has 320 places, 425 transitions, 4968 flow. Second operand 8 states and 144 transitions. [2024-06-27 19:54:42,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 453 transitions, 6434 flow [2024-06-27 19:54:45,645 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 453 transitions, 6297 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-27 19:54:45,651 INFO L231 Difference]: Finished difference. Result has 324 places, 429 transitions, 5057 flow [2024-06-27 19:54:45,652 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4831, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=425, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=348, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5057, PETRI_PLACES=324, PETRI_TRANSITIONS=429} [2024-06-27 19:54:45,652 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-27 19:54:45,652 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 429 transitions, 5057 flow [2024-06-27 19:54:45,652 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:45,652 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:45,652 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:45,653 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-27 19:54:45,653 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)] === [2024-06-27 19:54:45,653 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:45,653 INFO L85 PathProgramCache]: Analyzing trace with hash 1523769823, now seen corresponding path program 2 times [2024-06-27 19:54:45,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:45,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96153677] [2024-06-27 19:54:45,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:45,654 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:45,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:46,330 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:46,331 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:46,331 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96153677] [2024-06-27 19:54:46,331 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96153677] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:46,331 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:46,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:46,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [686793485] [2024-06-27 19:54:46,331 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:46,332 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:46,332 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:46,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:46,332 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:46,377 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:46,377 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 429 transitions, 5057 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:46,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:46,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:46,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:47,785 INFO L124 PetriNetUnfolderBase]: 4524/6787 cut-off events. [2024-06-27 19:54:47,786 INFO L125 PetriNetUnfolderBase]: For 1561477/1561479 co-relation queries the response was YES. [2024-06-27 19:54:47,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68233 conditions, 6787 events. 4524/6787 cut-off events. For 1561477/1561479 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 36960 event pairs, 1020 based on Foata normal form. 8/6795 useless extension candidates. Maximal degree in co-relation 68072. Up to 6185 conditions per place. [2024-06-27 19:54:47,892 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 362 selfloop transitions, 96 changer transitions 0/461 dead transitions. [2024-06-27 19:54:47,892 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 461 transitions, 6748 flow [2024-06-27 19:54:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:47,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-27 19:54:47,893 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-27 19:54:47,894 INFO L175 Difference]: Start difference. First operand has 324 places, 429 transitions, 5057 flow. Second operand 8 states and 150 transitions. [2024-06-27 19:54:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 461 transitions, 6748 flow [2024-06-27 19:54:52,258 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 461 transitions, 6579 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-27 19:54:52,263 INFO L231 Difference]: Finished difference. Result has 327 places, 433 transitions, 5156 flow [2024-06-27 19:54:52,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4888, PETRI_DIFFERENCE_MINUEND_PLACES=319, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=337, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5156, PETRI_PLACES=327, PETRI_TRANSITIONS=433} [2024-06-27 19:54:52,264 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 284 predicate places. [2024-06-27 19:54:52,264 INFO L495 AbstractCegarLoop]: Abstraction has has 327 places, 433 transitions, 5156 flow [2024-06-27 19:54:52,264 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:52,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:52,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:52,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-27 19:54:52,265 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)] === [2024-06-27 19:54:52,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:52,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2114099510, now seen corresponding path program 3 times [2024-06-27 19:54:52,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:52,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85121005] [2024-06-27 19:54:52,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:52,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:52,924 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:52,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85121005] [2024-06-27 19:54:52,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85121005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:52,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:52,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:52,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1431899291] [2024-06-27 19:54:52,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:52,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:52,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:52,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:52,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 327 places, 433 transitions, 5156 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:52,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:52,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:52,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:54:54,402 INFO L124 PetriNetUnfolderBase]: 4550/6824 cut-off events. [2024-06-27 19:54:54,402 INFO L125 PetriNetUnfolderBase]: For 1579388/1579390 co-relation queries the response was YES. [2024-06-27 19:54:54,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69272 conditions, 6824 events. 4550/6824 cut-off events. For 1579388/1579390 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 37174 event pairs, 1040 based on Foata normal form. 4/6828 useless extension candidates. Maximal degree in co-relation 69110. Up to 6491 conditions per place. [2024-06-27 19:54:54,497 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 373 selfloop transitions, 86 changer transitions 0/462 dead transitions. [2024-06-27 19:54:54,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 462 transitions, 6733 flow [2024-06-27 19:54:54,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:54:54,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:54:54,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-27 19:54:54,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-27 19:54:54,498 INFO L175 Difference]: Start difference. First operand has 327 places, 433 transitions, 5156 flow. Second operand 8 states and 140 transitions. [2024-06-27 19:54:54,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 462 transitions, 6733 flow [2024-06-27 19:54:59,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 462 transitions, 6569 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-27 19:54:59,142 INFO L231 Difference]: Finished difference. Result has 332 places, 441 transitions, 5346 flow [2024-06-27 19:54:59,142 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4992, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5346, PETRI_PLACES=332, PETRI_TRANSITIONS=441} [2024-06-27 19:54:59,142 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 289 predicate places. [2024-06-27 19:54:59,142 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 441 transitions, 5346 flow [2024-06-27 19:54:59,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:59,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:54:59,143 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:54:59,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-27 19:54:59,143 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)] === [2024-06-27 19:54:59,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:54:59,143 INFO L85 PathProgramCache]: Analyzing trace with hash 2114107167, now seen corresponding path program 3 times [2024-06-27 19:54:59,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:54:59,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1106464430] [2024-06-27 19:54:59,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:54:59,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:54:59,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:54:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:54:59,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:54:59,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1106464430] [2024-06-27 19:54:59,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1106464430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:54:59,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:54:59,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:54:59,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585122294] [2024-06-27 19:54:59,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:54:59,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:54:59,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:54:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:54:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:54:59,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:54:59,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 441 transitions, 5346 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:54:59,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:54:59,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:54:59,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:01,298 INFO L124 PetriNetUnfolderBase]: 4532/6799 cut-off events. [2024-06-27 19:55:01,298 INFO L125 PetriNetUnfolderBase]: For 1597161/1597163 co-relation queries the response was YES. [2024-06-27 19:55:01,538 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68674 conditions, 6799 events. 4532/6799 cut-off events. For 1597161/1597163 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 37054 event pairs, 1012 based on Foata normal form. 8/6807 useless extension candidates. Maximal degree in co-relation 68510. Up to 6210 conditions per place. [2024-06-27 19:55:01,564 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 367 selfloop transitions, 96 changer transitions 0/466 dead transitions. [2024-06-27 19:55:01,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 466 transitions, 6768 flow [2024-06-27 19:55:01,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:01,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:01,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-27 19:55:01,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 19:55:01,566 INFO L175 Difference]: Start difference. First operand has 332 places, 441 transitions, 5346 flow. Second operand 8 states and 146 transitions. [2024-06-27 19:55:01,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 466 transitions, 6768 flow [2024-06-27 19:55:05,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 466 transitions, 6596 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:05,544 INFO L231 Difference]: Finished difference. Result has 336 places, 441 transitions, 5376 flow [2024-06-27 19:55:05,544 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5174, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5376, PETRI_PLACES=336, PETRI_TRANSITIONS=441} [2024-06-27 19:55:05,545 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 293 predicate places. [2024-06-27 19:55:05,545 INFO L495 AbstractCegarLoop]: Abstraction has has 336 places, 441 transitions, 5376 flow [2024-06-27 19:55:05,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:55:05,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:05,545 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:05,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-27 19:55:05,545 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:55:05,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:05,551 INFO L85 PathProgramCache]: Analyzing trace with hash 1237433332, now seen corresponding path program 1 times [2024-06-27 19:55:05,552 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:05,552 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997442812] [2024-06-27 19:55:05,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:05,552 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:05,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:07,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:07,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:07,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997442812] [2024-06-27 19:55:07,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997442812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:07,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:07,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:55:07,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800601610] [2024-06-27 19:55:07,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:07,020 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:55:07,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:07,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:55:07,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:55:07,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:55:07,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 336 places, 441 transitions, 5376 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:55:07,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:07,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:55:07,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:09,068 INFO L124 PetriNetUnfolderBase]: 4467/6765 cut-off events. [2024-06-27 19:55:09,068 INFO L125 PetriNetUnfolderBase]: For 1652049/1652051 co-relation queries the response was YES. [2024-06-27 19:55:09,134 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69301 conditions, 6765 events. 4467/6765 cut-off events. For 1652049/1652051 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 37534 event pairs, 888 based on Foata normal form. 12/6767 useless extension candidates. Maximal degree in co-relation 69136. Up to 6014 conditions per place. [2024-06-27 19:55:09,162 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 390 selfloop transitions, 68 changer transitions 0/497 dead transitions. [2024-06-27 19:55:09,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 497 transitions, 6501 flow [2024-06-27 19:55:09,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:55:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:55:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 238 transitions. [2024-06-27 19:55:09,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4358974358974359 [2024-06-27 19:55:09,163 INFO L175 Difference]: Start difference. First operand has 336 places, 441 transitions, 5376 flow. Second operand 13 states and 238 transitions. [2024-06-27 19:55:09,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 497 transitions, 6501 flow [2024-06-27 19:55:13,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 497 transitions, 6331 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-27 19:55:13,402 INFO L231 Difference]: Finished difference. Result has 343 places, 442 transitions, 5396 flow [2024-06-27 19:55:13,402 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5206, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=5396, PETRI_PLACES=343, PETRI_TRANSITIONS=442} [2024-06-27 19:55:13,402 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-27 19:55:13,403 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 442 transitions, 5396 flow [2024-06-27 19:55:13,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:55:13,403 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:13,403 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:13,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-27 19:55:13,403 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)] === [2024-06-27 19:55:13,403 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:13,404 INFO L85 PathProgramCache]: Analyzing trace with hash 2114362669, now seen corresponding path program 2 times [2024-06-27 19:55:13,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:13,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830584338] [2024-06-27 19:55:13,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:13,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:13,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:14,485 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:14,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:14,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830584338] [2024-06-27 19:55:14,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830584338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:14,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:14,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:14,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86354787] [2024-06-27 19:55:14,486 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:14,486 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:14,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:14,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:14,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:14,591 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:55:14,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 442 transitions, 5396 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:14,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:14,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:55:14,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:16,281 INFO L124 PetriNetUnfolderBase]: 4585/6887 cut-off events. [2024-06-27 19:55:16,282 INFO L125 PetriNetUnfolderBase]: For 1637678/1637680 co-relation queries the response was YES. [2024-06-27 19:55:16,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69859 conditions, 6887 events. 4585/6887 cut-off events. For 1637678/1637680 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 37760 event pairs, 989 based on Foata normal form. 4/6891 useless extension candidates. Maximal degree in co-relation 69693. Up to 6583 conditions per place. [2024-06-27 19:55:16,376 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 424 selfloop transitions, 87 changer transitions 0/514 dead transitions. [2024-06-27 19:55:16,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 514 transitions, 7596 flow [2024-06-27 19:55:16,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:16,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:16,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 19:55:16,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 19:55:16,377 INFO L175 Difference]: Start difference. First operand has 343 places, 442 transitions, 5396 flow. Second operand 9 states and 153 transitions. [2024-06-27 19:55:16,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 514 transitions, 7596 flow [2024-06-27 19:55:21,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 514 transitions, 7426 flow, removed 18 selfloop flow, removed 11 redundant places. [2024-06-27 19:55:21,805 INFO L231 Difference]: Finished difference. Result has 344 places, 480 transitions, 6016 flow [2024-06-27 19:55:21,805 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5226, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6016, PETRI_PLACES=344, PETRI_TRANSITIONS=480} [2024-06-27 19:55:21,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-27 19:55:21,805 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 480 transitions, 6016 flow [2024-06-27 19:55:21,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:21,806 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:21,806 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:21,806 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-27 19:55:21,806 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)] === [2024-06-27 19:55:21,806 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:21,806 INFO L85 PathProgramCache]: Analyzing trace with hash -465046130, now seen corresponding path program 4 times [2024-06-27 19:55:21,807 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:21,807 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340850766] [2024-06-27 19:55:21,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:21,807 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:21,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:22,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340850766] [2024-06-27 19:55:22,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340850766] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:22,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:22,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:22,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627200807] [2024-06-27 19:55:22,862 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:22,862 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:22,862 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:22,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:55:22,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 480 transitions, 6016 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:22,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:22,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:55:22,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:24,688 INFO L124 PetriNetUnfolderBase]: 4601/6911 cut-off events. [2024-06-27 19:55:24,688 INFO L125 PetriNetUnfolderBase]: For 1676808/1676810 co-relation queries the response was YES. [2024-06-27 19:55:24,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70658 conditions, 6911 events. 4601/6911 cut-off events. For 1676808/1676810 co-relation queries the response was YES. Maximal size of possible extension queue 341. Compared 37824 event pairs, 1034 based on Foata normal form. 6/6917 useless extension candidates. Maximal degree in co-relation 70488. Up to 6730 conditions per place. [2024-06-27 19:55:24,783 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 439 selfloop transitions, 60 changer transitions 0/502 dead transitions. [2024-06-27 19:55:24,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 502 transitions, 7114 flow [2024-06-27 19:55:24,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:24,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:24,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-27 19:55:24,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-27 19:55:24,784 INFO L175 Difference]: Start difference. First operand has 344 places, 480 transitions, 6016 flow. Second operand 9 states and 148 transitions. [2024-06-27 19:55:24,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 502 transitions, 7114 flow [2024-06-27 19:55:29,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 349 places, 502 transitions, 7019 flow, removed 28 selfloop flow, removed 3 redundant places. [2024-06-27 19:55:29,982 INFO L231 Difference]: Finished difference. Result has 350 places, 483 transitions, 6107 flow [2024-06-27 19:55:29,983 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5921, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6107, PETRI_PLACES=350, PETRI_TRANSITIONS=483} [2024-06-27 19:55:29,983 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 307 predicate places. [2024-06-27 19:55:29,983 INFO L495 AbstractCegarLoop]: Abstraction has has 350 places, 483 transitions, 6107 flow [2024-06-27 19:55:29,983 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:29,983 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:29,983 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:29,983 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-27 19:55:29,984 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)] === [2024-06-27 19:55:29,984 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:29,984 INFO L85 PathProgramCache]: Analyzing trace with hash 750055327, now seen corresponding path program 3 times [2024-06-27 19:55:29,984 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:29,984 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2039407869] [2024-06-27 19:55:29,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:29,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:29,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:30,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:30,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:30,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2039407869] [2024-06-27 19:55:30,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2039407869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:30,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:30,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:30,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122821442] [2024-06-27 19:55:30,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:30,980 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:30,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:30,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:30,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:31,083 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:55:31,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 350 places, 483 transitions, 6107 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:31,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:31,084 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:55:31,084 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:32,771 INFO L124 PetriNetUnfolderBase]: 4611/6925 cut-off events. [2024-06-27 19:55:32,771 INFO L125 PetriNetUnfolderBase]: For 1695712/1695714 co-relation queries the response was YES. [2024-06-27 19:55:32,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71074 conditions, 6925 events. 4611/6925 cut-off events. For 1695712/1695714 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 37966 event pairs, 991 based on Foata normal form. 4/6929 useless extension candidates. Maximal degree in co-relation 70902. Up to 6622 conditions per place. [2024-06-27 19:55:32,862 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 430 selfloop transitions, 89 changer transitions 0/522 dead transitions. [2024-06-27 19:55:32,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 522 transitions, 7941 flow [2024-06-27 19:55:32,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:32,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:32,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-27 19:55:32,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-27 19:55:32,863 INFO L175 Difference]: Start difference. First operand has 350 places, 483 transitions, 6107 flow. Second operand 9 states and 154 transitions. [2024-06-27 19:55:32,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 522 transitions, 7941 flow [2024-06-27 19:55:37,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 522 transitions, 7783 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:37,255 INFO L231 Difference]: Finished difference. Result has 353 places, 489 transitions, 6240 flow [2024-06-27 19:55:37,255 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5949, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=483, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=395, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6240, PETRI_PLACES=353, PETRI_TRANSITIONS=489} [2024-06-27 19:55:37,255 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-27 19:55:37,256 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 489 transitions, 6240 flow [2024-06-27 19:55:37,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:37,256 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:37,256 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:37,256 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-27 19:55:37,256 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)] === [2024-06-27 19:55:37,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:37,257 INFO L85 PathProgramCache]: Analyzing trace with hash -465045789, now seen corresponding path program 4 times [2024-06-27 19:55:37,257 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:37,257 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855755370] [2024-06-27 19:55:37,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:37,257 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:37,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:38,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:38,112 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:38,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855755370] [2024-06-27 19:55:38,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855755370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:38,112 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:38,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:55:38,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515976711] [2024-06-27 19:55:38,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:38,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:55:38,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:38,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:55:38,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:55:38,224 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:55:38,224 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 489 transitions, 6240 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:38,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:38,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:55:38,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:39,762 INFO L124 PetriNetUnfolderBase]: 4621/6939 cut-off events. [2024-06-27 19:55:39,762 INFO L125 PetriNetUnfolderBase]: For 1725858/1725860 co-relation queries the response was YES. [2024-06-27 19:55:39,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71585 conditions, 6939 events. 4621/6939 cut-off events. For 1725858/1725860 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 38042 event pairs, 993 based on Foata normal form. 4/6943 useless extension candidates. Maximal degree in co-relation 71411. Up to 6617 conditions per place. [2024-06-27 19:55:39,871 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 423 selfloop transitions, 100 changer transitions 0/526 dead transitions. [2024-06-27 19:55:39,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 526 transitions, 8073 flow [2024-06-27 19:55:39,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:55:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:55:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-27 19:55:39,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-27 19:55:39,873 INFO L175 Difference]: Start difference. First operand has 353 places, 489 transitions, 6240 flow. Second operand 9 states and 155 transitions. [2024-06-27 19:55:39,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 526 transitions, 8073 flow [2024-06-27 19:55:44,360 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 526 transitions, 7886 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-27 19:55:44,365 INFO L231 Difference]: Finished difference. Result has 357 places, 493 transitions, 6346 flow [2024-06-27 19:55:44,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6053, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6346, PETRI_PLACES=357, PETRI_TRANSITIONS=493} [2024-06-27 19:55:44,366 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 314 predicate places. [2024-06-27 19:55:44,366 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 493 transitions, 6346 flow [2024-06-27 19:55:44,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:55:44,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:44,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:44,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-27 19:55:44,367 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)] === [2024-06-27 19:55:44,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:44,367 INFO L85 PathProgramCache]: Analyzing trace with hash 2018028934, now seen corresponding path program 4 times [2024-06-27 19:55:44,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:44,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561951011] [2024-06-27 19:55:44,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:44,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:44,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:44,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:44,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:44,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561951011] [2024-06-27 19:55:44,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561951011] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:44,946 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:44,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:44,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058217363] [2024-06-27 19:55:44,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:44,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:44,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:44,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:44,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:45,026 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:55:45,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 493 transitions, 6346 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:55:45,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:45,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:55:45,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:46,618 INFO L124 PetriNetUnfolderBase]: 4634/6956 cut-off events. [2024-06-27 19:55:46,618 INFO L125 PetriNetUnfolderBase]: For 1755712/1755712 co-relation queries the response was YES. [2024-06-27 19:55:46,697 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72205 conditions, 6956 events. 4634/6956 cut-off events. For 1755712/1755712 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38092 event pairs, 1027 based on Foata normal form. 1/6957 useless extension candidates. Maximal degree in co-relation 72030. Up to 6888 conditions per place. [2024-06-27 19:55:46,728 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 482 selfloop transitions, 35 changer transitions 0/520 dead transitions. [2024-06-27 19:55:46,728 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 520 transitions, 7784 flow [2024-06-27 19:55:46,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:46,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:46,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 19:55:46,729 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 19:55:46,729 INFO L175 Difference]: Start difference. First operand has 357 places, 493 transitions, 6346 flow. Second operand 8 states and 134 transitions. [2024-06-27 19:55:46,729 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 520 transitions, 7784 flow [2024-06-27 19:55:51,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 520 transitions, 7531 flow, removed 29 selfloop flow, removed 7 redundant places. [2024-06-27 19:55:51,800 INFO L231 Difference]: Finished difference. Result has 359 places, 499 transitions, 6319 flow [2024-06-27 19:55:51,800 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6093, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6319, PETRI_PLACES=359, PETRI_TRANSITIONS=499} [2024-06-27 19:55:51,800 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 316 predicate places. [2024-06-27 19:55:51,800 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 499 transitions, 6319 flow [2024-06-27 19:55:51,801 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:55:51,801 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:51,801 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-27 19:55:51,801 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)] === [2024-06-27 19:55:51,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash 1946686912, now seen corresponding path program 5 times [2024-06-27 19:55:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564892483] [2024-06-27 19:55:51,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:51,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:51,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:55:52,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:55:52,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:55:52,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564892483] [2024-06-27 19:55:52,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564892483] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:55:52,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:55:52,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:55:52,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388790637] [2024-06-27 19:55:52,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:55:52,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:55:52,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:55:52,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:55:52,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:55:52,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:55:52,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 499 transitions, 6319 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:55:52,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:55:52,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:55:52,530 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:55:54,355 INFO L124 PetriNetUnfolderBase]: 4639/6963 cut-off events. [2024-06-27 19:55:54,356 INFO L125 PetriNetUnfolderBase]: For 1787227/1787227 co-relation queries the response was YES. [2024-06-27 19:55:54,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72393 conditions, 6963 events. 4639/6963 cut-off events. For 1787227/1787227 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 38147 event pairs, 1033 based on Foata normal form. 1/6964 useless extension candidates. Maximal degree in co-relation 72216. Up to 6912 conditions per place. [2024-06-27 19:55:54,452 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 486 selfloop transitions, 30 changer transitions 0/519 dead transitions. [2024-06-27 19:55:54,452 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 519 transitions, 7472 flow [2024-06-27 19:55:54,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:55:54,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:55:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:55:54,453 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 19:55:54,453 INFO L175 Difference]: Start difference. First operand has 359 places, 499 transitions, 6319 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:55:54,454 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 519 transitions, 7472 flow [2024-06-27 19:55:59,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 519 transitions, 7350 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-27 19:55:59,777 INFO L231 Difference]: Finished difference. Result has 363 places, 502 transitions, 6348 flow [2024-06-27 19:55:59,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6219, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=499, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6348, PETRI_PLACES=363, PETRI_TRANSITIONS=502} [2024-06-27 19:55:59,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 320 predicate places. [2024-06-27 19:55:59,778 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 502 transitions, 6348 flow [2024-06-27 19:55:59,779 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:55:59,779 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:55:59,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:55:59,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-27 19:55:59,779 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)] === [2024-06-27 19:55:59,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:55:59,779 INFO L85 PathProgramCache]: Analyzing trace with hash 2047940008, now seen corresponding path program 6 times [2024-06-27 19:55:59,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:55:59,780 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126542301] [2024-06-27 19:55:59,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:55:59,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:55:59,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:00,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:00,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126542301] [2024-06-27 19:56:00,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126542301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:00,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:00,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:00,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238777775] [2024-06-27 19:56:00,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:00,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:00,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:00,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:00,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:00,531 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:56:00,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 502 transitions, 6348 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:00,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:00,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:56:00,532 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:02,107 INFO L124 PetriNetUnfolderBase]: 4644/6970 cut-off events. [2024-06-27 19:56:02,107 INFO L125 PetriNetUnfolderBase]: For 1817177/1817177 co-relation queries the response was YES. [2024-06-27 19:56:02,192 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72716 conditions, 6970 events. 4644/6970 cut-off events. For 1817177/1817177 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38188 event pairs, 1032 based on Foata normal form. 1/6971 useless extension candidates. Maximal degree in co-relation 72537. Up to 6861 conditions per place. [2024-06-27 19:56:02,221 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 473 selfloop transitions, 56 changer transitions 0/532 dead transitions. [2024-06-27 19:56:02,221 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 532 transitions, 8082 flow [2024-06-27 19:56:02,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:02,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:02,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:56:02,223 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 19:56:02,223 INFO L175 Difference]: Start difference. First operand has 363 places, 502 transitions, 6348 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:56:02,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 532 transitions, 8082 flow [2024-06-27 19:56:07,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 532 transitions, 7994 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-27 19:56:07,163 INFO L231 Difference]: Finished difference. Result has 366 places, 510 transitions, 6570 flow [2024-06-27 19:56:07,163 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6570, PETRI_PLACES=366, PETRI_TRANSITIONS=510} [2024-06-27 19:56:07,164 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 323 predicate places. [2024-06-27 19:56:07,164 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 510 transitions, 6570 flow [2024-06-27 19:56:07,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:07,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:07,165 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:07,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-27 19:56:07,165 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:07,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:07,166 INFO L85 PathProgramCache]: Analyzing trace with hash -854828845, now seen corresponding path program 4 times [2024-06-27 19:56:07,166 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:07,166 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348595974] [2024-06-27 19:56:07,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:07,166 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:07,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:07,831 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:07,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:07,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348595974] [2024-06-27 19:56:07,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348595974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:07,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:07,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:07,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1526394608] [2024-06-27 19:56:07,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:07,832 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:07,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:07,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:07,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:07,912 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:56:07,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 510 transitions, 6570 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:07,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:07,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:56:07,914 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:09,585 INFO L124 PetriNetUnfolderBase]: 4627/6946 cut-off events. [2024-06-27 19:56:09,585 INFO L125 PetriNetUnfolderBase]: For 1845019/1845019 co-relation queries the response was YES. [2024-06-27 19:56:09,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72687 conditions, 6946 events. 4627/6946 cut-off events. For 1845019/1845019 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38077 event pairs, 1008 based on Foata normal form. 3/6949 useless extension candidates. Maximal degree in co-relation 72506. Up to 6843 conditions per place. [2024-06-27 19:56:09,685 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 484 selfloop transitions, 45 changer transitions 0/532 dead transitions. [2024-06-27 19:56:09,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 532 transitions, 7919 flow [2024-06-27 19:56:09,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:09,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:09,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-27 19:56:09,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-27 19:56:09,686 INFO L175 Difference]: Start difference. First operand has 366 places, 510 transitions, 6570 flow. Second operand 8 states and 137 transitions. [2024-06-27 19:56:09,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 532 transitions, 7919 flow [2024-06-27 19:56:15,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 532 transitions, 7685 flow, removed 76 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:15,901 INFO L231 Difference]: Finished difference. Result has 369 places, 510 transitions, 6436 flow [2024-06-27 19:56:15,901 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6338, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=465, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6436, PETRI_PLACES=369, PETRI_TRANSITIONS=510} [2024-06-27 19:56:15,902 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 19:56:15,902 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 510 transitions, 6436 flow [2024-06-27 19:56:15,902 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:15,902 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:15,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:15,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-27 19:56:15,903 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)] === [2024-06-27 19:56:15,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:15,903 INFO L85 PathProgramCache]: Analyzing trace with hash -854829062, now seen corresponding path program 7 times [2024-06-27 19:56:15,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:15,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190038066] [2024-06-27 19:56:15,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:15,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:15,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:16,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:16,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:16,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190038066] [2024-06-27 19:56:16,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190038066] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:16,504 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:16,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:16,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689360785] [2024-06-27 19:56:16,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:16,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:16,505 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:16,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:16,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:16,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:56:16,593 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 510 transitions, 6436 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:16,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:16,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:56:16,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:18,279 INFO L124 PetriNetUnfolderBase]: 4624/6942 cut-off events. [2024-06-27 19:56:18,280 INFO L125 PetriNetUnfolderBase]: For 1852471/1852471 co-relation queries the response was YES. [2024-06-27 19:56:18,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72523 conditions, 6942 events. 4624/6942 cut-off events. For 1852471/1852471 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38004 event pairs, 1028 based on Foata normal form. 1/6943 useless extension candidates. Maximal degree in co-relation 72341. Up to 6834 conditions per place. [2024-06-27 19:56:18,376 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 470 selfloop transitions, 56 changer transitions 0/529 dead transitions. [2024-06-27 19:56:18,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 529 transitions, 7791 flow [2024-06-27 19:56:18,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:18,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:18,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-27 19:56:18,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2024-06-27 19:56:18,377 INFO L175 Difference]: Start difference. First operand has 369 places, 510 transitions, 6436 flow. Second operand 8 states and 133 transitions. [2024-06-27 19:56:18,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 529 transitions, 7791 flow [2024-06-27 19:56:23,802 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 529 transitions, 7275 flow, removed 12 selfloop flow, removed 12 redundant places. [2024-06-27 19:56:23,807 INFO L231 Difference]: Finished difference. Result has 365 places, 511 transitions, 6067 flow [2024-06-27 19:56:23,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5920, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=455, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6067, PETRI_PLACES=365, PETRI_TRANSITIONS=511} [2024-06-27 19:56:23,808 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 322 predicate places. [2024-06-27 19:56:23,808 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 511 transitions, 6067 flow [2024-06-27 19:56:23,808 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:23,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:23,808 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:23,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-27 19:56:23,808 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)] === [2024-06-27 19:56:23,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:23,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1256436889, now seen corresponding path program 5 times [2024-06-27 19:56:23,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:23,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316153916] [2024-06-27 19:56:23,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:23,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:23,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:24,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:24,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:24,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316153916] [2024-06-27 19:56:24,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316153916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:24,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:24,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:24,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685525845] [2024-06-27 19:56:24,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:24,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:24,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:24,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:24,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:24,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:56:24,456 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 511 transitions, 6067 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:24,456 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:24,456 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:56:24,456 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:26,040 INFO L124 PetriNetUnfolderBase]: 4663/6996 cut-off events. [2024-06-27 19:56:26,041 INFO L125 PetriNetUnfolderBase]: For 1913982/1913982 co-relation queries the response was YES. [2024-06-27 19:56:26,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73092 conditions, 6996 events. 4663/6996 cut-off events. For 1913982/1913982 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 38356 event pairs, 1014 based on Foata normal form. 3/6999 useless extension candidates. Maximal degree in co-relation 72911. Up to 6928 conditions per place. [2024-06-27 19:56:26,331 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 501 selfloop transitions, 35 changer transitions 0/539 dead transitions. [2024-06-27 19:56:26,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 539 transitions, 7575 flow [2024-06-27 19:56:26,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:26,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:26,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 19:56:26,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 19:56:26,332 INFO L175 Difference]: Start difference. First operand has 365 places, 511 transitions, 6067 flow. Second operand 8 states and 134 transitions. [2024-06-27 19:56:26,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 539 transitions, 7575 flow [2024-06-27 19:56:30,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 539 transitions, 7463 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:30,030 INFO L231 Difference]: Finished difference. Result has 369 places, 520 transitions, 6207 flow [2024-06-27 19:56:30,030 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5955, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=477, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6207, PETRI_PLACES=369, PETRI_TRANSITIONS=520} [2024-06-27 19:56:30,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 326 predicate places. [2024-06-27 19:56:30,031 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 520 transitions, 6207 flow [2024-06-27 19:56:30,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:30,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:30,031 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:30,031 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-27 19:56:30,032 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)] === [2024-06-27 19:56:30,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:30,032 INFO L85 PathProgramCache]: Analyzing trace with hash -1122895106, now seen corresponding path program 8 times [2024-06-27 19:56:30,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:30,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019409816] [2024-06-27 19:56:30,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:30,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:30,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:30,618 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:30,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:30,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019409816] [2024-06-27 19:56:30,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019409816] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:30,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:30,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:30,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831882260] [2024-06-27 19:56:30,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:30,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:30,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:30,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:30,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:30,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:56:30,690 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 520 transitions, 6207 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:30,690 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:30,690 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:56:30,690 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:32,271 INFO L124 PetriNetUnfolderBase]: 4676/7014 cut-off events. [2024-06-27 19:56:32,271 INFO L125 PetriNetUnfolderBase]: For 1939450/1939450 co-relation queries the response was YES. [2024-06-27 19:56:32,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73693 conditions, 7014 events. 4676/7014 cut-off events. For 1939450/1939450 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38478 event pairs, 1022 based on Foata normal form. 1/7015 useless extension candidates. Maximal degree in co-relation 73510. Up to 6953 conditions per place. [2024-06-27 19:56:32,382 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 501 selfloop transitions, 37 changer transitions 0/541 dead transitions. [2024-06-27 19:56:32,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 541 transitions, 7677 flow [2024-06-27 19:56:32,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:32,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:56:32,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 19:56:32,383 INFO L175 Difference]: Start difference. First operand has 369 places, 520 transitions, 6207 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:56:32,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 541 transitions, 7677 flow [2024-06-27 19:56:37,166 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 541 transitions, 7589 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-06-27 19:56:37,172 INFO L231 Difference]: Finished difference. Result has 374 places, 526 transitions, 6347 flow [2024-06-27 19:56:37,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6119, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=520, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6347, PETRI_PLACES=374, PETRI_TRANSITIONS=526} [2024-06-27 19:56:37,172 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-27 19:56:37,172 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 526 transitions, 6347 flow [2024-06-27 19:56:37,173 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:37,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:37,173 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:37,173 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-27 19:56:37,173 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)] === [2024-06-27 19:56:37,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:37,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1122449419, now seen corresponding path program 6 times [2024-06-27 19:56:37,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:37,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797390010] [2024-06-27 19:56:37,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:37,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:37,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:37,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:37,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:37,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797390010] [2024-06-27 19:56:37,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797390010] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:37,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:37,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:37,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620974608] [2024-06-27 19:56:37,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:37,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:37,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:37,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:37,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:37,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:56:37,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 526 transitions, 6347 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:37,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:37,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:56:37,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:39,482 INFO L124 PetriNetUnfolderBase]: 4667/7002 cut-off events. [2024-06-27 19:56:39,483 INFO L125 PetriNetUnfolderBase]: For 1963863/1963863 co-relation queries the response was YES. [2024-06-27 19:56:39,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73479 conditions, 7002 events. 4667/7002 cut-off events. For 1963863/1963863 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38389 event pairs, 1018 based on Foata normal form. 3/7005 useless extension candidates. Maximal degree in co-relation 73294. Up to 6951 conditions per place. [2024-06-27 19:56:39,592 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 510 selfloop transitions, 29 changer transitions 0/542 dead transitions. [2024-06-27 19:56:39,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 542 transitions, 7468 flow [2024-06-27 19:56:39,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:39,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:56:39,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 19:56:39,594 INFO L175 Difference]: Start difference. First operand has 374 places, 526 transitions, 6347 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:56:39,594 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 542 transitions, 7468 flow [2024-06-27 19:56:44,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 542 transitions, 7342 flow, removed 34 selfloop flow, removed 5 redundant places. [2024-06-27 19:56:44,265 INFO L231 Difference]: Finished difference. Result has 377 places, 526 transitions, 6286 flow [2024-06-27 19:56:44,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6221, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6286, PETRI_PLACES=377, PETRI_TRANSITIONS=526} [2024-06-27 19:56:44,265 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 334 predicate places. [2024-06-27 19:56:44,265 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 526 transitions, 6286 flow [2024-06-27 19:56:44,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:44,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:44,266 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:44,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-27 19:56:44,266 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)] === [2024-06-27 19:56:44,266 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:44,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1862855448, now seen corresponding path program 9 times [2024-06-27 19:56:44,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:44,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155723526] [2024-06-27 19:56:44,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:44,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:44,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:44,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:44,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:44,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155723526] [2024-06-27 19:56:44,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155723526] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:44,880 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:44,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:56:44,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577759274] [2024-06-27 19:56:44,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:44,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:56:44,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:44,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:56:44,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:56:44,943 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:56:44,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 526 transitions, 6286 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:44,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:44,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:56:44,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:46,655 INFO L124 PetriNetUnfolderBase]: 4664/6998 cut-off events. [2024-06-27 19:56:46,655 INFO L125 PetriNetUnfolderBase]: For 1973842/1973842 co-relation queries the response was YES. [2024-06-27 19:56:46,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73482 conditions, 6998 events. 4664/6998 cut-off events. For 1973842/1973842 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 38360 event pairs, 1021 based on Foata normal form. 1/6999 useless extension candidates. Maximal degree in co-relation 73296. Up to 6947 conditions per place. [2024-06-27 19:56:46,758 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 508 selfloop transitions, 29 changer transitions 0/540 dead transitions. [2024-06-27 19:56:46,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 540 transitions, 7394 flow [2024-06-27 19:56:46,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:56:46,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:56:46,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-27 19:56:46,759 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-27 19:56:46,759 INFO L175 Difference]: Start difference. First operand has 377 places, 526 transitions, 6286 flow. Second operand 8 states and 127 transitions. [2024-06-27 19:56:46,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 540 transitions, 7394 flow [2024-06-27 19:56:51,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 540 transitions, 7302 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:51,300 INFO L231 Difference]: Finished difference. Result has 378 places, 526 transitions, 6258 flow [2024-06-27 19:56:51,301 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6194, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6258, PETRI_PLACES=378, PETRI_TRANSITIONS=526} [2024-06-27 19:56:51,301 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 335 predicate places. [2024-06-27 19:56:51,301 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 526 transitions, 6258 flow [2024-06-27 19:56:51,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:56:51,301 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:51,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:51,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-27 19:56:51,302 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:51,302 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:51,302 INFO L85 PathProgramCache]: Analyzing trace with hash -465815854, now seen corresponding path program 2 times [2024-06-27 19:56:51,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:51,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301484139] [2024-06-27 19:56:51,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:51,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:56:52,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:56:52,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:56:52,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301484139] [2024-06-27 19:56:52,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301484139] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:56:52,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:56:52,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:56:52,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372023089] [2024-06-27 19:56:52,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:56:52,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:56:52,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:56:52,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:56:52,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:56:52,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:56:52,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 526 transitions, 6258 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:56:52,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:56:52,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:56:52,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:56:54,646 INFO L124 PetriNetUnfolderBase]: 4586/6950 cut-off events. [2024-06-27 19:56:54,646 INFO L125 PetriNetUnfolderBase]: For 2057296/2057296 co-relation queries the response was YES. [2024-06-27 19:56:54,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73666 conditions, 6950 events. 4586/6950 cut-off events. For 2057296/2057296 co-relation queries the response was YES. Maximal size of possible extension queue 353. Compared 38792 event pairs, 969 based on Foata normal form. 12/6962 useless extension candidates. Maximal degree in co-relation 73479. Up to 6452 conditions per place. [2024-06-27 19:56:54,750 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 486 selfloop transitions, 35 changer transitions 0/569 dead transitions. [2024-06-27 19:56:54,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 569 transitions, 7464 flow [2024-06-27 19:56:54,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:56:54,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:56:54,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-27 19:56:54,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 19:56:54,751 INFO L175 Difference]: Start difference. First operand has 378 places, 526 transitions, 6258 flow. Second operand 11 states and 196 transitions. [2024-06-27 19:56:54,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 569 transitions, 7464 flow [2024-06-27 19:56:59,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 381 places, 569 transitions, 7392 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-27 19:56:59,351 INFO L231 Difference]: Finished difference. Result has 382 places, 527 transitions, 6312 flow [2024-06-27 19:56:59,351 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6186, PETRI_DIFFERENCE_MINUEND_PLACES=371, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6312, PETRI_PLACES=382, PETRI_TRANSITIONS=527} [2024-06-27 19:56:59,351 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 339 predicate places. [2024-06-27 19:56:59,351 INFO L495 AbstractCegarLoop]: Abstraction has has 382 places, 527 transitions, 6312 flow [2024-06-27 19:56:59,351 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:56:59,351 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:56:59,352 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:56:59,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-27 19:56:59,352 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:56:59,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:56:59,352 INFO L85 PathProgramCache]: Analyzing trace with hash 1465940292, now seen corresponding path program 3 times [2024-06-27 19:56:59,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:56:59,352 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406395809] [2024-06-27 19:56:59,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:56:59,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:56:59,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:00,696 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:00,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:00,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406395809] [2024-06-27 19:57:00,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406395809] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:00,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:00,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:57:00,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251072992] [2024-06-27 19:57:00,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:00,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:57:00,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:00,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:57:00,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:57:00,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:57:00,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 382 places, 527 transitions, 6312 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:00,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:00,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:57:00,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:02,764 INFO L124 PetriNetUnfolderBase]: 4668/7092 cut-off events. [2024-06-27 19:57:02,765 INFO L125 PetriNetUnfolderBase]: For 2094264/2094264 co-relation queries the response was YES. [2024-06-27 19:57:02,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74792 conditions, 7092 events. 4668/7092 cut-off events. For 2094264/2094264 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 39992 event pairs, 989 based on Foata normal form. 12/7104 useless extension candidates. Maximal degree in co-relation 74604. Up to 6585 conditions per place. [2024-06-27 19:57:02,876 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 489 selfloop transitions, 33 changer transitions 0/570 dead transitions. [2024-06-27 19:57:02,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 570 transitions, 7525 flow [2024-06-27 19:57:02,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:57:02,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:57:02,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 19:57:02,878 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 19:57:02,878 INFO L175 Difference]: Start difference. First operand has 382 places, 527 transitions, 6312 flow. Second operand 11 states and 192 transitions. [2024-06-27 19:57:02,878 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 570 transitions, 7525 flow [2024-06-27 19:57:07,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 570 transitions, 7419 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:07,367 INFO L231 Difference]: Finished difference. Result has 384 places, 529 transitions, 6338 flow [2024-06-27 19:57:07,367 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6206, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6338, PETRI_PLACES=384, PETRI_TRANSITIONS=529} [2024-06-27 19:57:07,367 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-27 19:57:07,367 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 529 transitions, 6338 flow [2024-06-27 19:57:07,367 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:07,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:07,368 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:07,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-27 19:57:07,368 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:07,368 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:07,368 INFO L85 PathProgramCache]: Analyzing trace with hash 474319472, now seen corresponding path program 4 times [2024-06-27 19:57:07,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:07,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1450371623] [2024-06-27 19:57:07,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:07,369 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:07,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:08,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:08,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:08,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1450371623] [2024-06-27 19:57:08,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1450371623] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:08,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:08,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:57:08,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873035847] [2024-06-27 19:57:08,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:08,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:57:08,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:08,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:57:08,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:57:08,922 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:57:08,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 529 transitions, 6338 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:08,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:08,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:57:08,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:10,958 INFO L124 PetriNetUnfolderBase]: 4709/7163 cut-off events. [2024-06-27 19:57:10,958 INFO L125 PetriNetUnfolderBase]: For 2129118/2129118 co-relation queries the response was YES. [2024-06-27 19:57:11,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75418 conditions, 7163 events. 4709/7163 cut-off events. For 2129118/2129118 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40545 event pairs, 1014 based on Foata normal form. 12/7175 useless extension candidates. Maximal degree in co-relation 75229. Up to 6652 conditions per place. [2024-06-27 19:57:11,076 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 491 selfloop transitions, 42 changer transitions 0/581 dead transitions. [2024-06-27 19:57:11,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 581 transitions, 7594 flow [2024-06-27 19:57:11,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-27 19:57:11,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-27 19:57:11,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 229 transitions. [2024-06-27 19:57:11,078 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4194139194139194 [2024-06-27 19:57:11,078 INFO L175 Difference]: Start difference. First operand has 384 places, 529 transitions, 6338 flow. Second operand 13 states and 229 transitions. [2024-06-27 19:57:11,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 581 transitions, 7594 flow [2024-06-27 19:57:16,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 581 transitions, 7499 flow, removed 16 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:16,155 INFO L231 Difference]: Finished difference. Result has 388 places, 530 transitions, 6385 flow [2024-06-27 19:57:16,155 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6243, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=529, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6385, PETRI_PLACES=388, PETRI_TRANSITIONS=530} [2024-06-27 19:57:16,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 19:57:16,155 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 530 transitions, 6385 flow [2024-06-27 19:57:16,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:16,156 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:16,156 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:16,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-27 19:57:16,156 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:16,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:16,156 INFO L85 PathProgramCache]: Analyzing trace with hash 1779898992, now seen corresponding path program 5 times [2024-06-27 19:57:16,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:16,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082921293] [2024-06-27 19:57:16,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:16,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:16,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:17,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:17,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:17,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082921293] [2024-06-27 19:57:17,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082921293] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:17,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:17,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:57:17,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583486760] [2024-06-27 19:57:17,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:17,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:57:17,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:17,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:57:17,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:57:17,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:57:17,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 530 transitions, 6385 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:17,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:17,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:57:17,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:19,647 INFO L124 PetriNetUnfolderBase]: 4750/7234 cut-off events. [2024-06-27 19:57:19,648 INFO L125 PetriNetUnfolderBase]: For 2164310/2164310 co-relation queries the response was YES. [2024-06-27 19:57:19,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76009 conditions, 7234 events. 4750/7234 cut-off events. For 2164310/2164310 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 41079 event pairs, 1023 based on Foata normal form. 12/7246 useless extension candidates. Maximal degree in co-relation 75819. Up to 6827 conditions per place. [2024-06-27 19:57:19,770 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 501 selfloop transitions, 23 changer transitions 0/572 dead transitions. [2024-06-27 19:57:19,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 572 transitions, 7579 flow [2024-06-27 19:57:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:57:19,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:57:19,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-27 19:57:19,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-27 19:57:19,772 INFO L175 Difference]: Start difference. First operand has 388 places, 530 transitions, 6385 flow. Second operand 11 states and 190 transitions. [2024-06-27 19:57:19,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 572 transitions, 7579 flow [2024-06-27 19:57:26,282 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 572 transitions, 7457 flow, removed 20 selfloop flow, removed 11 redundant places. [2024-06-27 19:57:26,288 INFO L231 Difference]: Finished difference. Result has 388 places, 531 transitions, 6353 flow [2024-06-27 19:57:26,288 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6263, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=507, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6353, PETRI_PLACES=388, PETRI_TRANSITIONS=531} [2024-06-27 19:57:26,288 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 345 predicate places. [2024-06-27 19:57:26,288 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 531 transitions, 6353 flow [2024-06-27 19:57:26,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:26,288 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:26,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:26,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-27 19:57:26,289 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:26,289 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:26,289 INFO L85 PathProgramCache]: Analyzing trace with hash 1218038384, now seen corresponding path program 6 times [2024-06-27 19:57:26,289 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:26,289 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025190558] [2024-06-27 19:57:26,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:26,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:26,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:27,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:27,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:27,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025190558] [2024-06-27 19:57:27,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025190558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:27,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:27,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:57:27,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025344603] [2024-06-27 19:57:27,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:27,531 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:57:27,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:27,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:57:27,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:57:27,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:57:27,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 531 transitions, 6353 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:27,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:27,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:57:27,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:29,596 INFO L124 PetriNetUnfolderBase]: 4730/7202 cut-off events. [2024-06-27 19:57:29,596 INFO L125 PetriNetUnfolderBase]: For 2141340/2141340 co-relation queries the response was YES. [2024-06-27 19:57:29,688 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74688 conditions, 7202 events. 4730/7202 cut-off events. For 2141340/2141340 co-relation queries the response was YES. Maximal size of possible extension queue 365. Compared 40944 event pairs, 1015 based on Foata normal form. 12/7214 useless extension candidates. Maximal degree in co-relation 74497. Up to 6768 conditions per place. [2024-06-27 19:57:29,718 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 500 selfloop transitions, 26 changer transitions 0/574 dead transitions. [2024-06-27 19:57:29,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 574 transitions, 7530 flow [2024-06-27 19:57:29,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:57:29,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:57:29,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 19:57:29,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 19:57:29,720 INFO L175 Difference]: Start difference. First operand has 388 places, 531 transitions, 6353 flow. Second operand 11 states and 192 transitions. [2024-06-27 19:57:29,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 574 transitions, 7530 flow [2024-06-27 19:57:35,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 574 transitions, 7452 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-27 19:57:35,252 INFO L231 Difference]: Finished difference. Result has 392 places, 533 transitions, 6359 flow [2024-06-27 19:57:35,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6275, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6359, PETRI_PLACES=392, PETRI_TRANSITIONS=533} [2024-06-27 19:57:35,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 349 predicate places. [2024-06-27 19:57:35,252 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 533 transitions, 6359 flow [2024-06-27 19:57:35,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:35,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:35,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:35,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-27 19:57:35,253 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:35,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:35,253 INFO L85 PathProgramCache]: Analyzing trace with hash 1465932635, now seen corresponding path program 1 times [2024-06-27 19:57:35,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:35,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835080025] [2024-06-27 19:57:35,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:35,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:35,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:36,437 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:36,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:36,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835080025] [2024-06-27 19:57:36,438 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [835080025] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:36,438 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:36,438 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:57:36,438 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [116917841] [2024-06-27 19:57:36,438 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:36,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:57:36,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:36,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:57:36,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:57:36,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:57:36,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 533 transitions, 6359 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:36,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:36,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:57:36,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:38,515 INFO L124 PetriNetUnfolderBase]: 4838/7386 cut-off events. [2024-06-27 19:57:38,516 INFO L125 PetriNetUnfolderBase]: For 2176088/2176088 co-relation queries the response was YES. [2024-06-27 19:57:38,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75440 conditions, 7386 events. 4838/7386 cut-off events. For 2176088/2176088 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42402 event pairs, 1058 based on Foata normal form. 16/7402 useless extension candidates. Maximal degree in co-relation 75246. Up to 6635 conditions per place. [2024-06-27 19:57:38,634 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 490 selfloop transitions, 40 changer transitions 0/578 dead transitions. [2024-06-27 19:57:38,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 578 transitions, 7612 flow [2024-06-27 19:57:38,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:57:38,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:57:38,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-27 19:57:38,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42424242424242425 [2024-06-27 19:57:38,636 INFO L175 Difference]: Start difference. First operand has 392 places, 533 transitions, 6359 flow. Second operand 11 states and 196 transitions. [2024-06-27 19:57:38,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 578 transitions, 7612 flow [2024-06-27 19:57:43,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 578 transitions, 7431 flow, removed 18 selfloop flow, removed 8 redundant places. [2024-06-27 19:57:43,827 INFO L231 Difference]: Finished difference. Result has 395 places, 535 transitions, 6339 flow [2024-06-27 19:57:43,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6180, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=533, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6339, PETRI_PLACES=395, PETRI_TRANSITIONS=535} [2024-06-27 19:57:43,828 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 19:57:43,828 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 535 transitions, 6339 flow [2024-06-27 19:57:43,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:43,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:43,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:43,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-27 19:57:43,829 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:57:43,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:43,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1270890396, now seen corresponding path program 7 times [2024-06-27 19:57:43,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:43,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148489416] [2024-06-27 19:57:43,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:43,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:43,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:45,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:45,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148489416] [2024-06-27 19:57:45,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148489416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:45,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:45,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [] total 11 [2024-06-27 19:57:45,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792182971] [2024-06-27 19:57:45,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:45,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-06-27 19:57:45,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:45,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-06-27 19:57:45,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2024-06-27 19:57:45,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-27 19:57:45,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 535 transitions, 6339 flow. Second operand has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:45,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:45,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-27 19:57:45,470 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:47,271 INFO L124 PetriNetUnfolderBase]: 4818/7354 cut-off events. [2024-06-27 19:57:47,272 INFO L125 PetriNetUnfolderBase]: For 2131404/2131404 co-relation queries the response was YES. [2024-06-27 19:57:47,359 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73848 conditions, 7354 events. 4818/7354 cut-off events. For 2131404/2131404 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42255 event pairs, 1009 based on Foata normal form. 12/7366 useless extension candidates. Maximal degree in co-relation 73654. Up to 6765 conditions per place. [2024-06-27 19:57:47,389 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 487 selfloop transitions, 40 changer transitions 0/575 dead transitions. [2024-06-27 19:57:47,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 575 transitions, 7389 flow [2024-06-27 19:57:47,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 19:57:47,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 19:57:47,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-27 19:57:47,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4155844155844156 [2024-06-27 19:57:47,390 INFO L175 Difference]: Start difference. First operand has 395 places, 535 transitions, 6339 flow. Second operand 11 states and 192 transitions. [2024-06-27 19:57:47,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 575 transitions, 7389 flow [2024-06-27 19:57:53,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 575 transitions, 7267 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-27 19:57:53,533 INFO L231 Difference]: Finished difference. Result has 395 places, 534 transitions, 6187 flow [2024-06-27 19:57:53,533 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6101, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=494, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6187, PETRI_PLACES=395, PETRI_TRANSITIONS=534} [2024-06-27 19:57:53,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 352 predicate places. [2024-06-27 19:57:53,534 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 534 transitions, 6187 flow [2024-06-27 19:57:53,534 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 10.23076923076923) internal successors, (133), 13 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) [2024-06-27 19:57:53,534 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:57:53,534 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:57:53,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-27 19:57:53,535 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)] === [2024-06-27 19:57:53,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:57:53,535 INFO L85 PathProgramCache]: Analyzing trace with hash -1028529446, now seen corresponding path program 10 times [2024-06-27 19:57:53,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:57:53,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43786467] [2024-06-27 19:57:53,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:57:53,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:57:53,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:57:54,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:57:54,085 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:57:54,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43786467] [2024-06-27 19:57:54,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43786467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:57:54,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:57:54,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:57:54,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248331703] [2024-06-27 19:57:54,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:57:54,087 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:57:54,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:57:54,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:57:54,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:57:54,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:57:54,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 534 transitions, 6187 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:57:54,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:57:54,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:57:54,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:57:55,872 INFO L124 PetriNetUnfolderBase]: 4934/7471 cut-off events. [2024-06-27 19:57:55,872 INFO L125 PetriNetUnfolderBase]: For 2001719/2001721 co-relation queries the response was YES. [2024-06-27 19:57:55,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73372 conditions, 7471 events. 4934/7471 cut-off events. For 2001719/2001721 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 42351 event pairs, 1108 based on Foata normal form. 3/7474 useless extension candidates. Maximal degree in co-relation 73178. Up to 7418 conditions per place. [2024-06-27 19:57:56,001 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 29 changer transitions 0/545 dead transitions. [2024-06-27 19:57:56,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 402 places, 545 transitions, 7297 flow [2024-06-27 19:57:56,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:57:56,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:57:56,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-27 19:57:56,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-27 19:57:56,003 INFO L175 Difference]: Start difference. First operand has 395 places, 534 transitions, 6187 flow. Second operand 8 states and 123 transitions. [2024-06-27 19:57:56,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 402 places, 545 transitions, 7297 flow [2024-06-27 19:58:02,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 545 transitions, 7161 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-27 19:58:02,275 INFO L231 Difference]: Finished difference. Result has 393 places, 534 transitions, 6115 flow [2024-06-27 19:58:02,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6051, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6115, PETRI_PLACES=393, PETRI_TRANSITIONS=534} [2024-06-27 19:58:02,275 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 350 predicate places. [2024-06-27 19:58:02,275 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 534 transitions, 6115 flow [2024-06-27 19:58:02,275 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:02,276 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:02,276 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:02,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-27 19:58:02,276 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)] === [2024-06-27 19:58:02,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:02,277 INFO L85 PathProgramCache]: Analyzing trace with hash -99479961, now seen corresponding path program 7 times [2024-06-27 19:58:02,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:02,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963482467] [2024-06-27 19:58:02,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:02,277 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:02,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:02,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:02,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:02,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963482467] [2024-06-27 19:58:02,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963482467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:02,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:02,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:02,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188042679] [2024-06-27 19:58:02,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:02,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:02,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:02,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:02,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:58:02,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 534 transitions, 6115 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:02,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:02,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:58:02,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:04,680 INFO L124 PetriNetUnfolderBase]: 4949/7491 cut-off events. [2024-06-27 19:58:04,681 INFO L125 PetriNetUnfolderBase]: For 2015550/2015552 co-relation queries the response was YES. [2024-06-27 19:58:04,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73222 conditions, 7491 events. 4949/7491 cut-off events. For 2015550/2015552 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42510 event pairs, 1102 based on Foata normal form. 5/7496 useless extension candidates. Maximal degree in co-relation 73028. Up to 7439 conditions per place. [2024-06-27 19:58:04,821 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 30 changer transitions 0/552 dead transitions. [2024-06-27 19:58:04,822 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 400 places, 552 transitions, 7333 flow [2024-06-27 19:58:04,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:04,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:04,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 19:58:04,844 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 19:58:04,844 INFO L175 Difference]: Start difference. First operand has 393 places, 534 transitions, 6115 flow. Second operand 8 states and 125 transitions. [2024-06-27 19:58:04,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 400 places, 552 transitions, 7333 flow [2024-06-27 19:58:10,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 552 transitions, 7249 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:10,169 INFO L231 Difference]: Finished difference. Result has 394 places, 539 transitions, 6191 flow [2024-06-27 19:58:10,169 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6031, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6191, PETRI_PLACES=394, PETRI_TRANSITIONS=539} [2024-06-27 19:58:10,170 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-27 19:58:10,170 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 539 transitions, 6191 flow [2024-06-27 19:58:10,170 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:10,170 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:10,170 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:10,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-27 19:58:10,170 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:10,171 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:10,171 INFO L85 PathProgramCache]: Analyzing trace with hash -837632374, now seen corresponding path program 11 times [2024-06-27 19:58:10,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:10,171 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195306302] [2024-06-27 19:58:10,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:10,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:10,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:10,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:10,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:10,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195306302] [2024-06-27 19:58:10,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195306302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:10,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:10,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:10,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076809800] [2024-06-27 19:58:10,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:10,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:10,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:10,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:10,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:10,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:58:10,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 539 transitions, 6191 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:10,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:10,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:58:10,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:12,615 INFO L124 PetriNetUnfolderBase]: 4946/7488 cut-off events. [2024-06-27 19:58:12,615 INFO L125 PetriNetUnfolderBase]: For 2024023/2024025 co-relation queries the response was YES. [2024-06-27 19:58:12,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73320 conditions, 7488 events. 4946/7488 cut-off events. For 2024023/2024025 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42475 event pairs, 1112 based on Foata normal form. 3/7491 useless extension candidates. Maximal degree in co-relation 73126. Up to 7429 conditions per place. [2024-06-27 19:58:12,739 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 513 selfloop transitions, 34 changer transitions 0/550 dead transitions. [2024-06-27 19:58:12,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 550 transitions, 7311 flow [2024-06-27 19:58:12,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:12,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:12,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-27 19:58:12,740 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-27 19:58:12,740 INFO L175 Difference]: Start difference. First operand has 394 places, 539 transitions, 6191 flow. Second operand 8 states and 125 transitions. [2024-06-27 19:58:12,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 550 transitions, 7311 flow [2024-06-27 19:58:17,607 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 550 transitions, 7190 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:17,613 INFO L231 Difference]: Finished difference. Result has 397 places, 539 transitions, 6144 flow [2024-06-27 19:58:17,613 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6070, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=505, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6144, PETRI_PLACES=397, PETRI_TRANSITIONS=539} [2024-06-27 19:58:17,614 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 19:58:17,614 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 539 transitions, 6144 flow [2024-06-27 19:58:17,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:17,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:17,614 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:17,614 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-27 19:58:17,614 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:17,614 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:17,615 INFO L85 PathProgramCache]: Analyzing trace with hash 426813417, now seen corresponding path program 8 times [2024-06-27 19:58:17,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:17,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78420192] [2024-06-27 19:58:17,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:17,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:17,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:18,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:18,167 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:18,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78420192] [2024-06-27 19:58:18,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78420192] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:18,168 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:18,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:18,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902652523] [2024-06-27 19:58:18,168 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:18,168 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:18,168 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:18,169 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:18,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:18,250 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:58:18,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 539 transitions, 6144 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:18,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:18,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:58:18,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:19,978 INFO L124 PetriNetUnfolderBase]: 4937/7475 cut-off events. [2024-06-27 19:58:19,978 INFO L125 PetriNetUnfolderBase]: For 2046756/2046758 co-relation queries the response was YES. [2024-06-27 19:58:20,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72999 conditions, 7475 events. 4937/7475 cut-off events. For 2046756/2046758 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 42397 event pairs, 1102 based on Foata normal form. 5/7480 useless extension candidates. Maximal degree in co-relation 72804. Up to 7397 conditions per place. [2024-06-27 19:58:20,100 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 512 selfloop transitions, 40 changer transitions 0/555 dead transitions. [2024-06-27 19:58:20,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 555 transitions, 7546 flow [2024-06-27 19:58:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:20,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:20,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:58:20,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 19:58:20,101 INFO L175 Difference]: Start difference. First operand has 397 places, 539 transitions, 6144 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:58:20,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 555 transitions, 7546 flow [2024-06-27 19:58:25,672 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 395 places, 555 transitions, 7418 flow, removed 5 selfloop flow, removed 9 redundant places. [2024-06-27 19:58:25,678 INFO L231 Difference]: Finished difference. Result has 396 places, 539 transitions, 6103 flow [2024-06-27 19:58:25,678 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6016, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6103, PETRI_PLACES=396, PETRI_TRANSITIONS=539} [2024-06-27 19:58:25,679 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 353 predicate places. [2024-06-27 19:58:25,679 INFO L495 AbstractCegarLoop]: Abstraction has has 396 places, 539 transitions, 6103 flow [2024-06-27 19:58:25,679 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:25,679 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:25,679 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:25,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-27 19:58:25,679 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:25,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:25,680 INFO L85 PathProgramCache]: Analyzing trace with hash 678045477, now seen corresponding path program 9 times [2024-06-27 19:58:25,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:25,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630893794] [2024-06-27 19:58:25,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:25,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:26,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:26,337 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630893794] [2024-06-27 19:58:26,337 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630893794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:26,337 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:26,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:26,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [543891259] [2024-06-27 19:58:26,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:26,337 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:26,337 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:26,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:26,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:26,410 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:58:26,410 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 396 places, 539 transitions, 6103 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:26,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:26,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:58:26,410 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:28,120 INFO L124 PetriNetUnfolderBase]: 4919/7451 cut-off events. [2024-06-27 19:58:28,121 INFO L125 PetriNetUnfolderBase]: For 2054471/2054473 co-relation queries the response was YES. [2024-06-27 19:58:28,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72331 conditions, 7451 events. 4919/7451 cut-off events. For 2054471/2054473 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 42295 event pairs, 1095 based on Foata normal form. 8/7459 useless extension candidates. Maximal degree in co-relation 72136. Up to 7292 conditions per place. [2024-06-27 19:58:28,233 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 503 selfloop transitions, 49 changer transitions 0/555 dead transitions. [2024-06-27 19:58:28,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 555 transitions, 7507 flow [2024-06-27 19:58:28,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:28,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:28,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-27 19:58:28,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-27 19:58:28,235 INFO L175 Difference]: Start difference. First operand has 396 places, 539 transitions, 6103 flow. Second operand 8 states and 130 transitions. [2024-06-27 19:58:28,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 555 transitions, 7507 flow [2024-06-27 19:58:35,241 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 555 transitions, 7356 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-27 19:58:35,247 INFO L231 Difference]: Finished difference. Result has 397 places, 539 transitions, 6060 flow [2024-06-27 19:58:35,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5952, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=490, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6060, PETRI_PLACES=397, PETRI_TRANSITIONS=539} [2024-06-27 19:58:35,247 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-27 19:58:35,247 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 539 transitions, 6060 flow [2024-06-27 19:58:35,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:35,248 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:35,248 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:35,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-27 19:58:35,248 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-27 19:58:35,248 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:35,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1014496767, now seen corresponding path program 10 times [2024-06-27 19:58:35,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:35,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544880164] [2024-06-27 19:58:35,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:35,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:35,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:35,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:35,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:35,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544880164] [2024-06-27 19:58:35,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544880164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:35,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:35,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:35,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1524009262] [2024-06-27 19:58:35,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:35,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:35,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:35,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:35,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:36,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:58:36,001 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 539 transitions, 6060 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:36,001 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:36,001 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:58:36,001 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:37,756 INFO L124 PetriNetUnfolderBase]: 4949/7493 cut-off events. [2024-06-27 19:58:37,756 INFO L125 PetriNetUnfolderBase]: For 2086220/2086222 co-relation queries the response was YES. [2024-06-27 19:58:37,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72804 conditions, 7493 events. 4949/7493 cut-off events. For 2086220/2086222 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42544 event pairs, 1093 based on Foata normal form. 8/7501 useless extension candidates. Maximal degree in co-relation 72609. Up to 7155 conditions per place. [2024-06-27 19:58:37,866 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 475 selfloop transitions, 85 changer transitions 0/563 dead transitions. [2024-06-27 19:58:37,866 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 404 places, 563 transitions, 7832 flow [2024-06-27 19:58:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:37,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-27 19:58:37,867 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 19:58:37,867 INFO L175 Difference]: Start difference. First operand has 397 places, 539 transitions, 6060 flow. Second operand 8 states and 136 transitions. [2024-06-27 19:58:37,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 404 places, 563 transitions, 7832 flow [2024-06-27 19:58:44,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 563 transitions, 7732 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:44,590 INFO L231 Difference]: Finished difference. Result has 400 places, 545 transitions, 6233 flow [2024-06-27 19:58:44,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5960, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=539, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6233, PETRI_PLACES=400, PETRI_TRANSITIONS=545} [2024-06-27 19:58:44,590 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-27 19:58:44,591 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 545 transitions, 6233 flow [2024-06-27 19:58:44,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:44,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:44,591 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:44,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-27 19:58:44,591 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)] === [2024-06-27 19:58:44,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:44,591 INFO L85 PathProgramCache]: Analyzing trace with hash -992123043, now seen corresponding path program 11 times [2024-06-27 19:58:44,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:44,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048333745] [2024-06-27 19:58:44,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:44,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:44,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:45,204 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:45,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:45,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048333745] [2024-06-27 19:58:45,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048333745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:45,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:45,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:45,205 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849336663] [2024-06-27 19:58:45,205 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:45,205 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:45,205 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:45,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:58:45,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 545 transitions, 6233 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:45,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:45,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:58:45,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:47,159 INFO L124 PetriNetUnfolderBase]: 4934/7472 cut-off events. [2024-06-27 19:58:47,159 INFO L125 PetriNetUnfolderBase]: For 2068494/2068496 co-relation queries the response was YES. [2024-06-27 19:58:47,241 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72630 conditions, 7472 events. 4934/7472 cut-off events. For 2068494/2068496 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42403 event pairs, 1097 based on Foata normal form. 5/7477 useless extension candidates. Maximal degree in co-relation 72434. Up to 7420 conditions per place. [2024-06-27 19:58:47,268 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 524 selfloop transitions, 31 changer transitions 0/558 dead transitions. [2024-06-27 19:58:47,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 407 places, 558 transitions, 7378 flow [2024-06-27 19:58:47,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:47,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:47,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-27 19:58:47,269 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-27 19:58:47,269 INFO L175 Difference]: Start difference. First operand has 400 places, 545 transitions, 6233 flow. Second operand 8 states and 124 transitions. [2024-06-27 19:58:47,269 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 407 places, 558 transitions, 7378 flow [2024-06-27 19:58:54,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 558 transitions, 7184 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-27 19:58:54,657 INFO L231 Difference]: Finished difference. Result has 403 places, 545 transitions, 6108 flow [2024-06-27 19:58:54,658 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6039, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6108, PETRI_PLACES=403, PETRI_TRANSITIONS=545} [2024-06-27 19:58:54,658 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 360 predicate places. [2024-06-27 19:58:54,658 INFO L495 AbstractCegarLoop]: Abstraction has has 403 places, 545 transitions, 6108 flow [2024-06-27 19:58:54,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:54,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:58:54,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:58:54,659 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-27 19:58:54,659 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)] === [2024-06-27 19:58:54,659 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:58:54,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1014763894, now seen corresponding path program 12 times [2024-06-27 19:58:54,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:58:54,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361815718] [2024-06-27 19:58:54,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:58:54,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:58:54,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:58:55,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:58:55,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:58:55,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361815718] [2024-06-27 19:58:55,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361815718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:58:55,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:58:55,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:58:55,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732534806] [2024-06-27 19:58:55,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:58:55,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:58:55,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:58:55,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:58:55,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:58:55,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:58:55,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 403 places, 545 transitions, 6108 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:58:55,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:58:55,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:58:55,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:58:57,259 INFO L124 PetriNetUnfolderBase]: 4928/7465 cut-off events. [2024-06-27 19:58:57,259 INFO L125 PetriNetUnfolderBase]: For 2073023/2073025 co-relation queries the response was YES. [2024-06-27 19:58:57,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72216 conditions, 7465 events. 4928/7465 cut-off events. For 2073023/2073025 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42361 event pairs, 1103 based on Foata normal form. 4/7469 useless extension candidates. Maximal degree in co-relation 72019. Up to 7353 conditions per place. [2024-06-27 19:58:57,376 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 503 selfloop transitions, 52 changer transitions 0/558 dead transitions. [2024-06-27 19:58:57,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 558 transitions, 7523 flow [2024-06-27 19:58:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:58:57,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:58:57,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-27 19:58:57,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-27 19:58:57,378 INFO L175 Difference]: Start difference. First operand has 403 places, 545 transitions, 6108 flow. Second operand 8 states and 129 transitions. [2024-06-27 19:58:57,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 558 transitions, 7523 flow [2024-06-27 19:59:03,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 558 transitions, 7355 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-27 19:59:03,296 INFO L231 Difference]: Finished difference. Result has 402 places, 546 transitions, 6098 flow [2024-06-27 19:59:03,296 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5940, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=545, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=493, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6098, PETRI_PLACES=402, PETRI_TRANSITIONS=546} [2024-06-27 19:59:03,296 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 19:59:03,296 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 546 transitions, 6098 flow [2024-06-27 19:59:03,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:59:03,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:03,297 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:03,297 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-27 19:59:03,297 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)] === [2024-06-27 19:59:03,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:03,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1014763677, now seen corresponding path program 12 times [2024-06-27 19:59:03,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:03,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282355597] [2024-06-27 19:59:03,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:03,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:03,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:03,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:03,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282355597] [2024-06-27 19:59:03,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282355597] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:03,905 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:03,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 19:59:03,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646833326] [2024-06-27 19:59:03,905 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:03,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 19:59:03,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:03,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 19:59:03,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-27 19:59:03,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:59:03,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 546 transitions, 6098 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:59:03,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:03,971 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:59:03,971 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:05,863 INFO L124 PetriNetUnfolderBase]: 4904/7431 cut-off events. [2024-06-27 19:59:05,864 INFO L125 PetriNetUnfolderBase]: For 2086569/2086571 co-relation queries the response was YES. [2024-06-27 19:59:05,945 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71500 conditions, 7431 events. 4904/7431 cut-off events. For 2086569/2086571 co-relation queries the response was YES. Maximal size of possible extension queue 383. Compared 42177 event pairs, 1075 based on Foata normal form. 8/7439 useless extension candidates. Maximal degree in co-relation 71301. Up to 7118 conditions per place. [2024-06-27 19:59:05,973 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 471 selfloop transitions, 88 changer transitions 0/562 dead transitions. [2024-06-27 19:59:05,973 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 562 transitions, 7262 flow [2024-06-27 19:59:05,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-27 19:59:05,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-27 19:59:05,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-27 19:59:05,974 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-27 19:59:05,974 INFO L175 Difference]: Start difference. First operand has 402 places, 546 transitions, 6098 flow. Second operand 8 states and 134 transitions. [2024-06-27 19:59:05,974 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 562 transitions, 7262 flow [2024-06-27 19:59:11,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 562 transitions, 7070 flow, removed 34 selfloop flow, removed 8 redundant places. [2024-06-27 19:59:11,965 INFO L231 Difference]: Finished difference. Result has 402 places, 546 transitions, 6095 flow [2024-06-27 19:59:11,965 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5910, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6095, PETRI_PLACES=402, PETRI_TRANSITIONS=546} [2024-06-27 19:59:11,966 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 359 predicate places. [2024-06-27 19:59:11,966 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 546 transitions, 6095 flow [2024-06-27 19:59:11,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 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) [2024-06-27 19:59:11,966 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:11,966 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:11,966 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-27 19:59:11,966 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)] === [2024-06-27 19:59:11,967 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:11,967 INFO L85 PathProgramCache]: Analyzing trace with hash -1020402207, now seen corresponding path program 5 times [2024-06-27 19:59:11,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:11,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500920317] [2024-06-27 19:59:11,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:11,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:11,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:12,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:12,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:12,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500920317] [2024-06-27 19:59:12,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500920317] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:12,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:12,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:12,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203003665] [2024-06-27 19:59:12,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:12,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:12,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:12,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:12,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:12,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:59:12,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 546 transitions, 6095 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:12,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:12,907 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:59:12,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:14,861 INFO L124 PetriNetUnfolderBase]: 4934/7473 cut-off events. [2024-06-27 19:59:14,861 INFO L125 PetriNetUnfolderBase]: For 2118218/2118220 co-relation queries the response was YES. [2024-06-27 19:59:14,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72105 conditions, 7473 events. 4934/7473 cut-off events. For 2118218/2118220 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 42440 event pairs, 1087 based on Foata normal form. 8/7481 useless extension candidates. Maximal degree in co-relation 71906. Up to 7302 conditions per place. [2024-06-27 19:59:14,968 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 508 selfloop transitions, 57 changer transitions 0/568 dead transitions. [2024-06-27 19:59:14,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 568 transitions, 7364 flow [2024-06-27 19:59:14,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:14,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:14,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-27 19:59:14,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-27 19:59:14,969 INFO L175 Difference]: Start difference. First operand has 402 places, 546 transitions, 6095 flow. Second operand 9 states and 144 transitions. [2024-06-27 19:59:14,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 568 transitions, 7364 flow [2024-06-27 19:59:21,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 400 places, 568 transitions, 7008 flow, removed 1 selfloop flow, removed 10 redundant places. [2024-06-27 19:59:21,862 INFO L231 Difference]: Finished difference. Result has 401 places, 551 transitions, 5967 flow [2024-06-27 19:59:21,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5739, PETRI_DIFFERENCE_MINUEND_PLACES=392, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5967, PETRI_PLACES=401, PETRI_TRANSITIONS=551} [2024-06-27 19:59:21,862 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 358 predicate places. [2024-06-27 19:59:21,862 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 551 transitions, 5967 flow [2024-06-27 19:59:21,863 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:21,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:21,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:21,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-27 19:59:21,863 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)] === [2024-06-27 19:59:21,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:21,863 INFO L85 PathProgramCache]: Analyzing trace with hash -1014875525, now seen corresponding path program 6 times [2024-06-27 19:59:21,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:21,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823504315] [2024-06-27 19:59:21,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:21,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:21,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:22,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:22,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:22,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823504315] [2024-06-27 19:59:22,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823504315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:22,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:22,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:22,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598490058] [2024-06-27 19:59:22,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:22,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:22,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:22,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:22,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:22,948 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:59:22,948 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 551 transitions, 5967 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:22,948 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:22,948 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:59:22,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:24,856 INFO L124 PetriNetUnfolderBase]: 4944/7487 cut-off events. [2024-06-27 19:59:24,856 INFO L125 PetriNetUnfolderBase]: For 2113679/2113681 co-relation queries the response was YES. [2024-06-27 19:59:24,939 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72312 conditions, 7487 events. 4944/7487 cut-off events. For 2113679/2113681 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 42529 event pairs, 1071 based on Foata normal form. 4/7491 useless extension candidates. Maximal degree in co-relation 72112. Up to 7342 conditions per place. [2024-06-27 19:59:24,966 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 509 selfloop transitions, 72 changer transitions 0/584 dead transitions. [2024-06-27 19:59:24,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 584 transitions, 7380 flow [2024-06-27 19:59:24,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:24,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:24,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 19:59:24,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 19:59:24,968 INFO L175 Difference]: Start difference. First operand has 401 places, 551 transitions, 5967 flow. Second operand 9 states and 141 transitions. [2024-06-27 19:59:24,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 584 transitions, 7380 flow [2024-06-27 19:59:32,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 402 places, 584 transitions, 7191 flow, removed 35 selfloop flow, removed 7 redundant places. [2024-06-27 19:59:32,377 INFO L231 Difference]: Finished difference. Result has 406 places, 570 transitions, 6243 flow [2024-06-27 19:59:32,377 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=394, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6243, PETRI_PLACES=406, PETRI_TRANSITIONS=570} [2024-06-27 19:59:32,379 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 363 predicate places. [2024-06-27 19:59:32,379 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 570 transitions, 6243 flow [2024-06-27 19:59:32,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:32,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:32,379 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:32,379 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-27 19:59:32,380 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)] === [2024-06-27 19:59:32,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:32,380 INFO L85 PathProgramCache]: Analyzing trace with hash -103871669, now seen corresponding path program 7 times [2024-06-27 19:59:32,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:32,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [698061882] [2024-06-27 19:59:32,380 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:32,380 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:32,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:33,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:33,275 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [698061882] [2024-06-27 19:59:33,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [698061882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:33,275 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:33,275 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:33,275 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21403203] [2024-06-27 19:59:33,275 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:33,275 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:33,275 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:33,276 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:33,276 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:33,390 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:59:33,390 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 570 transitions, 6243 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:33,390 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:33,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:59:33,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:35,300 INFO L124 PetriNetUnfolderBase]: 4954/7501 cut-off events. [2024-06-27 19:59:35,301 INFO L125 PetriNetUnfolderBase]: For 2144692/2144694 co-relation queries the response was YES. [2024-06-27 19:59:35,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72734 conditions, 7501 events. 4954/7501 cut-off events. For 2144692/2144694 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42656 event pairs, 1071 based on Foata normal form. 4/7505 useless extension candidates. Maximal degree in co-relation 72530. Up to 7356 conditions per place. [2024-06-27 19:59:35,430 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 521 selfloop transitions, 66 changer transitions 0/590 dead transitions. [2024-06-27 19:59:35,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 590 transitions, 7577 flow [2024-06-27 19:59:35,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:35,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:35,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-27 19:59:35,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.373015873015873 [2024-06-27 19:59:35,432 INFO L175 Difference]: Start difference. First operand has 406 places, 570 transitions, 6243 flow. Second operand 9 states and 141 transitions. [2024-06-27 19:59:35,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 590 transitions, 7577 flow [2024-06-27 19:59:43,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 590 transitions, 7387 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-27 19:59:43,141 INFO L231 Difference]: Finished difference. Result has 410 places, 576 transitions, 6318 flow [2024-06-27 19:59:43,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6057, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=506, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6318, PETRI_PLACES=410, PETRI_TRANSITIONS=576} [2024-06-27 19:59:43,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-27 19:59:43,141 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 576 transitions, 6318 flow [2024-06-27 19:59:43,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:43,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:43,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:43,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-27 19:59:43,142 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)] === [2024-06-27 19:59:43,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:43,143 INFO L85 PathProgramCache]: Analyzing trace with hash 692787062, now seen corresponding path program 1 times [2024-06-27 19:59:43,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:43,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823251031] [2024-06-27 19:59:43,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:43,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:43,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:43,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:43,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:43,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823251031] [2024-06-27 19:59:43,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823251031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:43,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:43,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:43,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776660569] [2024-06-27 19:59:43,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:43,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:43,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:43,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:43,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:44,002 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:59:44,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 576 transitions, 6318 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:44,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:44,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:59:44,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:46,098 INFO L124 PetriNetUnfolderBase]: 4962/7513 cut-off events. [2024-06-27 19:59:46,098 INFO L125 PetriNetUnfolderBase]: For 2173961/2173963 co-relation queries the response was YES. [2024-06-27 19:59:46,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72792 conditions, 7513 events. 4962/7513 cut-off events. For 2173961/2173963 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 42661 event pairs, 1064 based on Foata normal form. 6/7519 useless extension candidates. Maximal degree in co-relation 72587. Up to 7381 conditions per place. [2024-06-27 19:59:46,208 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 550 selfloop transitions, 47 changer transitions 0/600 dead transitions. [2024-06-27 19:59:46,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 600 transitions, 8020 flow [2024-06-27 19:59:46,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:46,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:46,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 19:59:46,209 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 19:59:46,209 INFO L175 Difference]: Start difference. First operand has 410 places, 576 transitions, 6318 flow. Second operand 9 states and 142 transitions. [2024-06-27 19:59:46,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 600 transitions, 8020 flow [2024-06-27 19:59:53,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 600 transitions, 7868 flow, removed 41 selfloop flow, removed 4 redundant places. [2024-06-27 19:59:53,338 INFO L231 Difference]: Finished difference. Result has 416 places, 584 transitions, 6491 flow [2024-06-27 19:59:53,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6166, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6491, PETRI_PLACES=416, PETRI_TRANSITIONS=584} [2024-06-27 19:59:53,339 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 373 predicate places. [2024-06-27 19:59:53,339 INFO L495 AbstractCegarLoop]: Abstraction has has 416 places, 584 transitions, 6491 flow [2024-06-27 19:59:53,339 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:53,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 19:59:53,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 19:59:53,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-27 19:59:53,339 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)] === [2024-06-27 19:59:53,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 19:59:53,340 INFO L85 PathProgramCache]: Analyzing trace with hash 249558548, now seen corresponding path program 5 times [2024-06-27 19:59:53,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 19:59:53,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389694181] [2024-06-27 19:59:53,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 19:59:53,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 19:59:53,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 19:59:54,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 19:59:54,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 19:59:54,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389694181] [2024-06-27 19:59:54,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389694181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 19:59:54,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 19:59:54,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 19:59:54,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1111235969] [2024-06-27 19:59:54,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 19:59:54,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 19:59:54,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 19:59:54,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 19:59:54,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-27 19:59:54,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 19:59:54,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 416 places, 584 transitions, 6491 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 19:59:54,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 19:59:54,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 19:59:54,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 19:59:56,249 INFO L124 PetriNetUnfolderBase]: 4952/7499 cut-off events. [2024-06-27 19:59:56,250 INFO L125 PetriNetUnfolderBase]: For 2175321/2175323 co-relation queries the response was YES. [2024-06-27 19:59:56,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72785 conditions, 7499 events. 4952/7499 cut-off events. For 2175321/2175323 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42545 event pairs, 1077 based on Foata normal form. 6/7505 useless extension candidates. Maximal degree in co-relation 72578. Up to 7425 conditions per place. [2024-06-27 19:59:56,373 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 556 selfloop transitions, 38 changer transitions 0/597 dead transitions. [2024-06-27 19:59:56,374 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 597 transitions, 7709 flow [2024-06-27 19:59:56,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 19:59:56,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 19:59:56,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-27 19:59:56,375 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-27 19:59:56,375 INFO L175 Difference]: Start difference. First operand has 416 places, 584 transitions, 6491 flow. Second operand 9 states and 138 transitions. [2024-06-27 19:59:56,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 597 transitions, 7709 flow [2024-06-27 20:00:03,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 597 transitions, 7489 flow, removed 94 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:03,825 INFO L231 Difference]: Finished difference. Result has 421 places, 584 transitions, 6353 flow [2024-06-27 20:00:03,825 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6271, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=546, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6353, PETRI_PLACES=421, PETRI_TRANSITIONS=584} [2024-06-27 20:00:03,825 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 378 predicate places. [2024-06-27 20:00:03,826 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 584 transitions, 6353 flow [2024-06-27 20:00:03,826 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:03,826 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:03,826 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:03,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-27 20:00:03,826 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)] === [2024-06-27 20:00:03,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:03,827 INFO L85 PathProgramCache]: Analyzing trace with hash 249558889, now seen corresponding path program 8 times [2024-06-27 20:00:03,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:03,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665359650] [2024-06-27 20:00:03,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:03,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:03,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:04,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:04,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:04,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665359650] [2024-06-27 20:00:04,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665359650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:04,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:04,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:04,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1307494758] [2024-06-27 20:00:04,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:04,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:04,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:04,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:04,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:04,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:00:04,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 584 transitions, 6353 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:04,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:04,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:00:04,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:06,622 INFO L124 PetriNetUnfolderBase]: 4946/7491 cut-off events. [2024-06-27 20:00:06,622 INFO L125 PetriNetUnfolderBase]: For 2168169/2168171 co-relation queries the response was YES. [2024-06-27 20:00:06,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72167 conditions, 7491 events. 4946/7491 cut-off events. For 2168169/2168171 co-relation queries the response was YES. Maximal size of possible extension queue 390. Compared 42555 event pairs, 1067 based on Foata normal form. 4/7495 useless extension candidates. Maximal degree in co-relation 71958. Up to 7322 conditions per place. [2024-06-27 20:00:06,747 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 512 selfloop transitions, 89 changer transitions 0/604 dead transitions. [2024-06-27 20:00:06,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 604 transitions, 7711 flow [2024-06-27 20:00:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:06,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:06,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-27 20:00:06,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37566137566137564 [2024-06-27 20:00:06,748 INFO L175 Difference]: Start difference. First operand has 421 places, 584 transitions, 6353 flow. Second operand 9 states and 142 transitions. [2024-06-27 20:00:06,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 604 transitions, 7711 flow [2024-06-27 20:00:15,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 604 transitions, 7573 flow, removed 13 selfloop flow, removed 9 redundant places. [2024-06-27 20:00:15,536 INFO L231 Difference]: Finished difference. Result has 422 places, 590 transitions, 6546 flow [2024-06-27 20:00:15,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6215, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6546, PETRI_PLACES=422, PETRI_TRANSITIONS=590} [2024-06-27 20:00:15,536 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 379 predicate places. [2024-06-27 20:00:15,536 INFO L495 AbstractCegarLoop]: Abstraction has has 422 places, 590 transitions, 6546 flow [2024-06-27 20:00:15,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:15,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:15,537 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:15,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-27 20:00:15,537 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)] === [2024-06-27 20:00:15,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:15,537 INFO L85 PathProgramCache]: Analyzing trace with hash 2026699107, now seen corresponding path program 1 times [2024-06-27 20:00:15,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:15,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322814026] [2024-06-27 20:00:15,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:15,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:15,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:16,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:16,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:16,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322814026] [2024-06-27 20:00:16,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322814026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:16,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:16,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:16,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042887873] [2024-06-27 20:00:16,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:16,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:16,301 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:16,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:16,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:16,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:00:16,439 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 422 places, 590 transitions, 6546 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:16,439 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:16,439 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:00:16,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:18,438 INFO L124 PetriNetUnfolderBase]: 4976/7532 cut-off events. [2024-06-27 20:00:18,439 INFO L125 PetriNetUnfolderBase]: For 2237899/2237899 co-relation queries the response was YES. [2024-06-27 20:00:18,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72694 conditions, 7532 events. 4976/7532 cut-off events. For 2237899/2237899 co-relation queries the response was YES. Maximal size of possible extension queue 393. Compared 42797 event pairs, 1082 based on Foata normal form. 6/7538 useless extension candidates. Maximal degree in co-relation 72484. Up to 7452 conditions per place. [2024-06-27 20:00:18,566 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 593 selfloop transitions, 22 changer transitions 0/618 dead transitions. [2024-06-27 20:00:18,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 618 transitions, 7902 flow [2024-06-27 20:00:18,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:18,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-27 20:00:18,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3835978835978836 [2024-06-27 20:00:18,567 INFO L175 Difference]: Start difference. First operand has 422 places, 590 transitions, 6546 flow. Second operand 9 states and 145 transitions. [2024-06-27 20:00:18,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 618 transitions, 7902 flow [2024-06-27 20:00:26,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 618 transitions, 7659 flow, removed 45 selfloop flow, removed 6 redundant places. [2024-06-27 20:00:26,731 INFO L231 Difference]: Finished difference. Result has 425 places, 593 transitions, 6415 flow [2024-06-27 20:00:26,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6303, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=590, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6415, PETRI_PLACES=425, PETRI_TRANSITIONS=593} [2024-06-27 20:00:26,731 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 382 predicate places. [2024-06-27 20:00:26,731 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 593 transitions, 6415 flow [2024-06-27 20:00:26,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:26,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:26,732 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:26,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-27 20:00:26,732 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)] === [2024-06-27 20:00:26,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:26,732 INFO L85 PathProgramCache]: Analyzing trace with hash -1266533823, now seen corresponding path program 2 times [2024-06-27 20:00:26,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:26,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833592784] [2024-06-27 20:00:26,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:26,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:27,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:27,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:27,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833592784] [2024-06-27 20:00:27,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833592784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:27,418 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:27,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:27,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825538413] [2024-06-27 20:00:27,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:27,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:27,419 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:27,419 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:27,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:27,520 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:00:27,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 593 transitions, 6415 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:27,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:27,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:00:27,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:29,659 INFO L124 PetriNetUnfolderBase]: 5054/7640 cut-off events. [2024-06-27 20:00:29,659 INFO L125 PetriNetUnfolderBase]: For 2327246/2327246 co-relation queries the response was YES. [2024-06-27 20:00:29,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74732 conditions, 7640 events. 5054/7640 cut-off events. For 2327246/2327246 co-relation queries the response was YES. Maximal size of possible extension queue 399. Compared 43414 event pairs, 1077 based on Foata normal form. 6/7646 useless extension candidates. Maximal degree in co-relation 74521. Up to 7284 conditions per place. [2024-06-27 20:00:29,791 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 553 selfloop transitions, 78 changer transitions 0/634 dead transitions. [2024-06-27 20:00:29,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 634 transitions, 8517 flow [2024-06-27 20:00:29,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:29,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:29,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-27 20:00:29,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-27 20:00:29,792 INFO L175 Difference]: Start difference. First operand has 425 places, 593 transitions, 6415 flow. Second operand 9 states and 162 transitions. [2024-06-27 20:00:29,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 634 transitions, 8517 flow [2024-06-27 20:00:37,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 634 transitions, 8427 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-27 20:00:37,497 INFO L231 Difference]: Finished difference. Result has 427 places, 602 transitions, 6679 flow [2024-06-27 20:00:37,498 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6325, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=593, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=521, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6679, PETRI_PLACES=427, PETRI_TRANSITIONS=602} [2024-06-27 20:00:37,498 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 384 predicate places. [2024-06-27 20:00:37,498 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 602 transitions, 6679 flow [2024-06-27 20:00:37,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:37,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:37,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:37,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-27 20:00:37,499 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)] === [2024-06-27 20:00:37,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:37,499 INFO L85 PathProgramCache]: Analyzing trace with hash -2006736895, now seen corresponding path program 3 times [2024-06-27 20:00:37,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:37,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1461737154] [2024-06-27 20:00:37,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:37,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:37,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:38,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:38,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1461737154] [2024-06-27 20:00:38,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1461737154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:38,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:38,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:38,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771713178] [2024-06-27 20:00:38,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:38,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:38,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:38,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:38,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:38,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:00:38,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 602 transitions, 6679 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:38,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:38,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:00:38,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:40,584 INFO L124 PetriNetUnfolderBase]: 5036/7616 cut-off events. [2024-06-27 20:00:40,584 INFO L125 PetriNetUnfolderBase]: For 2303858/2303858 co-relation queries the response was YES. [2024-06-27 20:00:40,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74347 conditions, 7616 events. 5036/7616 cut-off events. For 2303858/2303858 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 43254 event pairs, 1071 based on Foata normal form. 6/7622 useless extension candidates. Maximal degree in co-relation 74135. Up to 7273 conditions per place. [2024-06-27 20:00:40,745 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 77 changer transitions 0/635 dead transitions. [2024-06-27 20:00:40,746 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 635 transitions, 8329 flow [2024-06-27 20:00:40,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:40,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:40,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:00:40,747 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:00:40,747 INFO L175 Difference]: Start difference. First operand has 427 places, 602 transitions, 6679 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:00:40,747 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 635 transitions, 8329 flow [2024-06-27 20:00:49,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 431 places, 635 transitions, 8165 flow, removed 58 selfloop flow, removed 4 redundant places. [2024-06-27 20:00:49,794 INFO L231 Difference]: Finished difference. Result has 432 places, 602 transitions, 6675 flow [2024-06-27 20:00:49,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6515, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6675, PETRI_PLACES=432, PETRI_TRANSITIONS=602} [2024-06-27 20:00:49,795 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 389 predicate places. [2024-06-27 20:00:49,795 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 602 transitions, 6675 flow [2024-06-27 20:00:49,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:49,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:00:49,795 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:00:49,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-27 20:00:49,796 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)] === [2024-06-27 20:00:49,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:00:49,796 INFO L85 PathProgramCache]: Analyzing trace with hash -1862846365, now seen corresponding path program 4 times [2024-06-27 20:00:49,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:00:49,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690333026] [2024-06-27 20:00:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:00:49,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:00:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:00:50,494 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:00:50,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:00:50,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690333026] [2024-06-27 20:00:50,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690333026] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:00:50,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:00:50,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:00:50,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993268814] [2024-06-27 20:00:50,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:00:50,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:00:50,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:00:50,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:00:50,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:00:50,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:00:50,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 602 transitions, 6675 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:00:50,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:00:50,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:00:50,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:00:52,795 INFO L124 PetriNetUnfolderBase]: 5114/7724 cut-off events. [2024-06-27 20:00:52,795 INFO L125 PetriNetUnfolderBase]: For 2395699/2395699 co-relation queries the response was YES. [2024-06-27 20:00:52,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76075 conditions, 7724 events. 5114/7724 cut-off events. For 2395699/2395699 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 43912 event pairs, 1090 based on Foata normal form. 6/7730 useless extension candidates. Maximal degree in co-relation 75861. Up to 7328 conditions per place. [2024-06-27 20:00:52,936 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 558 selfloop transitions, 79 changer transitions 0/640 dead transitions. [2024-06-27 20:00:52,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 640 transitions, 8741 flow [2024-06-27 20:00:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:00:52,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:00:52,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-27 20:00:52,937 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-27 20:00:52,937 INFO L175 Difference]: Start difference. First operand has 432 places, 602 transitions, 6675 flow. Second operand 9 states and 163 transitions. [2024-06-27 20:00:52,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 640 transitions, 8741 flow [2024-06-27 20:01:01,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 640 transitions, 8598 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-27 20:01:01,671 INFO L231 Difference]: Finished difference. Result has 434 places, 608 transitions, 6816 flow [2024-06-27 20:01:01,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=602, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6816, PETRI_PLACES=434, PETRI_TRANSITIONS=608} [2024-06-27 20:01:01,671 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-27 20:01:01,672 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 608 transitions, 6816 flow [2024-06-27 20:01:01,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:01,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:01,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:01,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-27 20:01:01,672 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)] === [2024-06-27 20:01:01,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:01,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1862638975, now seen corresponding path program 5 times [2024-06-27 20:01:01,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:01,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667612113] [2024-06-27 20:01:01,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:01,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:01,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:02,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:02,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:02,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667612113] [2024-06-27 20:01:02,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667612113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:02,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:02,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:02,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208143728] [2024-06-27 20:01:02,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:02,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:02,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:02,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:02,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:02,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:01:02,518 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 608 transitions, 6816 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:02,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:02,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:01:02,518 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:04,768 INFO L124 PetriNetUnfolderBase]: 5144/7766 cut-off events. [2024-06-27 20:01:04,769 INFO L125 PetriNetUnfolderBase]: For 2431257/2431257 co-relation queries the response was YES. [2024-06-27 20:01:04,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76630 conditions, 7766 events. 5144/7766 cut-off events. For 2431257/2431257 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 44177 event pairs, 1092 based on Foata normal form. 6/7772 useless extension candidates. Maximal degree in co-relation 76415. Up to 7350 conditions per place. [2024-06-27 20:01:04,925 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 84 changer transitions 0/641 dead transitions. [2024-06-27 20:01:04,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 641 transitions, 8821 flow [2024-06-27 20:01:04,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:04,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:04,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:01:04,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:01:04,926 INFO L175 Difference]: Start difference. First operand has 434 places, 608 transitions, 6816 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:01:04,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 641 transitions, 8821 flow [2024-06-27 20:01:13,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 437 places, 641 transitions, 8643 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-27 20:01:13,783 INFO L231 Difference]: Finished difference. Result has 438 places, 611 transitions, 6875 flow [2024-06-27 20:01:13,784 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6651, PETRI_DIFFERENCE_MINUEND_PLACES=429, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6875, PETRI_PLACES=438, PETRI_TRANSITIONS=611} [2024-06-27 20:01:13,784 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 395 predicate places. [2024-06-27 20:01:13,784 INFO L495 AbstractCegarLoop]: Abstraction has has 438 places, 611 transitions, 6875 flow [2024-06-27 20:01:13,784 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:13,784 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:13,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:13,785 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-27 20:01:13,785 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)] === [2024-06-27 20:01:13,785 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:13,785 INFO L85 PathProgramCache]: Analyzing trace with hash -1122643293, now seen corresponding path program 6 times [2024-06-27 20:01:13,785 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:13,785 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533369524] [2024-06-27 20:01:13,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:13,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:13,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:14,522 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:14,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:14,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533369524] [2024-06-27 20:01:14,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533369524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:14,523 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:14,523 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:14,523 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664258157] [2024-06-27 20:01:14,523 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:14,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:14,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:14,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:14,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:14,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:01:14,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 438 places, 611 transitions, 6875 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:14,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:14,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:01:14,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:16,773 INFO L124 PetriNetUnfolderBase]: 5126/7742 cut-off events. [2024-06-27 20:01:16,774 INFO L125 PetriNetUnfolderBase]: For 2402402/2402402 co-relation queries the response was YES. [2024-06-27 20:01:16,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75625 conditions, 7742 events. 5126/7742 cut-off events. For 2402402/2402402 co-relation queries the response was YES. Maximal size of possible extension queue 407. Compared 44012 event pairs, 1091 based on Foata normal form. 6/7748 useless extension candidates. Maximal degree in co-relation 75409. Up to 7339 conditions per place. [2024-06-27 20:01:16,915 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 81 changer transitions 0/643 dead transitions. [2024-06-27 20:01:16,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 643 transitions, 8551 flow [2024-06-27 20:01:16,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:16,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:16,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 164 transitions. [2024-06-27 20:01:16,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43386243386243384 [2024-06-27 20:01:16,917 INFO L175 Difference]: Start difference. First operand has 438 places, 611 transitions, 6875 flow. Second operand 9 states and 164 transitions. [2024-06-27 20:01:16,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 643 transitions, 8551 flow [2024-06-27 20:01:25,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 643 transitions, 8353 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:25,703 INFO L231 Difference]: Finished difference. Result has 441 places, 611 transitions, 6845 flow [2024-06-27 20:01:25,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6677, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6845, PETRI_PLACES=441, PETRI_TRANSITIONS=611} [2024-06-27 20:01:25,703 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-27 20:01:25,704 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 611 transitions, 6845 flow [2024-06-27 20:01:25,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:25,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:25,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:25,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-27 20:01:25,704 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)] === [2024-06-27 20:01:25,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:25,704 INFO L85 PathProgramCache]: Analyzing trace with hash 353530719, now seen corresponding path program 7 times [2024-06-27 20:01:25,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:25,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764654600] [2024-06-27 20:01:25,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:25,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:25,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:26,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:26,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:26,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764654600] [2024-06-27 20:01:26,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764654600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:26,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:26,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:26,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585208171] [2024-06-27 20:01:26,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:26,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:26,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:26,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:26,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:26,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:01:26,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 611 transitions, 6845 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:26,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:26,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:01:26,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:28,708 INFO L124 PetriNetUnfolderBase]: 5204/7852 cut-off events. [2024-06-27 20:01:28,708 INFO L125 PetriNetUnfolderBase]: For 2499492/2499494 co-relation queries the response was YES. [2024-06-27 20:01:28,814 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77295 conditions, 7852 events. 5204/7852 cut-off events. For 2499492/2499494 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 44685 event pairs, 1121 based on Foata normal form. 6/7858 useless extension candidates. Maximal degree in co-relation 77078. Up to 7394 conditions per place. [2024-06-27 20:01:28,848 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 555 selfloop transitions, 87 changer transitions 0/645 dead transitions. [2024-06-27 20:01:28,848 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 645 transitions, 8935 flow [2024-06-27 20:01:28,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:28,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:28,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:01:28,849 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:01:28,849 INFO L175 Difference]: Start difference. First operand has 441 places, 611 transitions, 6845 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:01:28,849 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 645 transitions, 8935 flow [2024-06-27 20:01:38,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 645 transitions, 8723 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:01:38,770 INFO L231 Difference]: Finished difference. Result has 441 places, 617 transitions, 6945 flow [2024-06-27 20:01:38,770 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6645, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=530, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6945, PETRI_PLACES=441, PETRI_TRANSITIONS=617} [2024-06-27 20:01:38,771 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-27 20:01:38,771 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 617 transitions, 6945 flow [2024-06-27 20:01:38,772 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:38,772 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:38,772 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:38,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-27 20:01:38,772 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)] === [2024-06-27 20:01:38,772 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:38,772 INFO L85 PathProgramCache]: Analyzing trace with hash 427059433, now seen corresponding path program 8 times [2024-06-27 20:01:38,772 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:38,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [179618278] [2024-06-27 20:01:38,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:38,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:38,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:39,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:39,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:39,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [179618278] [2024-06-27 20:01:39,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [179618278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:39,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:39,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:39,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608813401] [2024-06-27 20:01:39,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:39,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:39,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:39,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:39,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:39,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:01:39,605 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 617 transitions, 6945 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:39,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:39,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:01:39,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:41,859 INFO L124 PetriNetUnfolderBase]: 5234/7894 cut-off events. [2024-06-27 20:01:41,859 INFO L125 PetriNetUnfolderBase]: For 2534561/2534563 co-relation queries the response was YES. [2024-06-27 20:01:41,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77849 conditions, 7894 events. 5234/7894 cut-off events. For 2534561/2534563 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44938 event pairs, 1108 based on Foata normal form. 6/7900 useless extension candidates. Maximal degree in co-relation 77631. Up to 7416 conditions per place. [2024-06-27 20:01:42,018 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 548 selfloop transitions, 94 changer transitions 0/645 dead transitions. [2024-06-27 20:01:42,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 645 transitions, 8669 flow [2024-06-27 20:01:42,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:42,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-27 20:01:42,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-27 20:01:42,020 INFO L175 Difference]: Start difference. First operand has 441 places, 617 transitions, 6945 flow. Second operand 9 states and 156 transitions. [2024-06-27 20:01:42,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 645 transitions, 8669 flow [2024-06-27 20:01:52,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 645 transitions, 8420 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-27 20:01:52,022 INFO L231 Difference]: Finished difference. Result has 444 places, 620 transitions, 6956 flow [2024-06-27 20:01:52,023 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6712, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=526, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6956, PETRI_PLACES=444, PETRI_TRANSITIONS=620} [2024-06-27 20:01:52,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 401 predicate places. [2024-06-27 20:01:52,023 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 620 transitions, 6956 flow [2024-06-27 20:01:52,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:52,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:01:52,024 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:01:52,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-27 20:01:52,024 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)] === [2024-06-27 20:01:52,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:01:52,024 INFO L85 PathProgramCache]: Analyzing trace with hash 683767333, now seen corresponding path program 9 times [2024-06-27 20:01:52,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:01:52,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963952446] [2024-06-27 20:01:52,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:01:52,025 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:01:52,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:01:52,772 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:01:52,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:01:52,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963952446] [2024-06-27 20:01:52,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [963952446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:01:52,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:01:52,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:01:52,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851670544] [2024-06-27 20:01:52,773 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:01:52,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:01:52,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:01:52,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:01:52,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:01:52,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:01:52,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 620 transitions, 6956 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:01:52,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:01:52,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:01:52,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:01:55,155 INFO L124 PetriNetUnfolderBase]: 5216/7870 cut-off events. [2024-06-27 20:01:55,155 INFO L125 PetriNetUnfolderBase]: For 2501374/2501376 co-relation queries the response was YES. [2024-06-27 20:01:55,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76781 conditions, 7870 events. 5216/7870 cut-off events. For 2501374/2501376 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 44777 event pairs, 1111 based on Foata normal form. 6/7876 useless extension candidates. Maximal degree in co-relation 76562. Up to 7405 conditions per place. [2024-06-27 20:01:55,297 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 544 selfloop transitions, 96 changer transitions 0/643 dead transitions. [2024-06-27 20:01:55,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 643 transitions, 8602 flow [2024-06-27 20:01:55,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:01:55,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:01:55,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-27 20:01:55,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-27 20:01:55,298 INFO L175 Difference]: Start difference. First operand has 444 places, 620 transitions, 6956 flow. Second operand 9 states and 153 transitions. [2024-06-27 20:01:55,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 643 transitions, 8602 flow [2024-06-27 20:02:04,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 643 transitions, 8258 flow, removed 35 selfloop flow, removed 8 redundant places. [2024-06-27 20:02:04,514 INFO L231 Difference]: Finished difference. Result has 445 places, 620 transitions, 6810 flow [2024-06-27 20:02:04,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6612, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=524, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6810, PETRI_PLACES=445, PETRI_TRANSITIONS=620} [2024-06-27 20:02:04,515 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-27 20:02:04,515 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 620 transitions, 6810 flow [2024-06-27 20:02:04,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:04,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:04,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:04,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-27 20:02:04,515 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)] === [2024-06-27 20:02:04,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:04,516 INFO L85 PathProgramCache]: Analyzing trace with hash 427065013, now seen corresponding path program 10 times [2024-06-27 20:02:04,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:04,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1611009485] [2024-06-27 20:02:04,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:04,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:04,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:05,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:05,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:05,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1611009485] [2024-06-27 20:02:05,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1611009485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:05,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:05,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:02:05,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503860455] [2024-06-27 20:02:05,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:05,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:02:05,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:05,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:02:05,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=51, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:02:05,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:02:05,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 620 transitions, 6810 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:05,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:05,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:02:05,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:07,772 INFO L124 PetriNetUnfolderBase]: 5198/7846 cut-off events. [2024-06-27 20:02:07,772 INFO L125 PetriNetUnfolderBase]: For 2466266/2466268 co-relation queries the response was YES. [2024-06-27 20:02:07,869 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75654 conditions, 7846 events. 5198/7846 cut-off events. For 2466266/2466268 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 44689 event pairs, 1118 based on Foata normal form. 6/7852 useless extension candidates. Maximal degree in co-relation 75434. Up to 7394 conditions per place. [2024-06-27 20:02:07,900 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 550 selfloop transitions, 92 changer transitions 0/645 dead transitions. [2024-06-27 20:02:07,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 453 places, 645 transitions, 8180 flow [2024-06-27 20:02:07,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:02:07,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:02:07,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-27 20:02:07,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-27 20:02:07,901 INFO L175 Difference]: Start difference. First operand has 445 places, 620 transitions, 6810 flow. Second operand 9 states and 157 transitions. [2024-06-27 20:02:07,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 453 places, 645 transitions, 8180 flow [2024-06-27 20:02:17,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 645 transitions, 7942 flow, removed 16 selfloop flow, removed 8 redundant places. [2024-06-27 20:02:17,302 INFO L231 Difference]: Finished difference. Result has 446 places, 620 transitions, 6762 flow [2024-06-27 20:02:17,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6572, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6762, PETRI_PLACES=446, PETRI_TRANSITIONS=620} [2024-06-27 20:02:17,303 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 403 predicate places. [2024-06-27 20:02:17,303 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 620 transitions, 6762 flow [2024-06-27 20:02:17,303 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:17,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:17,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:17,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-27 20:02:17,303 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)] === [2024-06-27 20:02:17,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:17,304 INFO L85 PathProgramCache]: Analyzing trace with hash 1362852425, now seen corresponding path program 1 times [2024-06-27 20:02:17,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:17,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715125733] [2024-06-27 20:02:17,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:17,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:17,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:18,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:18,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:18,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715125733] [2024-06-27 20:02:18,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715125733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:18,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:18,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:18,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294946551] [2024-06-27 20:02:18,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:18,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:18,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:18,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:18,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:18,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:02:18,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 620 transitions, 6762 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:18,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:18,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:02:18,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:20,306 INFO L124 PetriNetUnfolderBase]: 5203/7852 cut-off events. [2024-06-27 20:02:20,307 INFO L125 PetriNetUnfolderBase]: For 2443484/2443486 co-relation queries the response was YES. [2024-06-27 20:02:20,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75806 conditions, 7852 events. 5203/7852 cut-off events. For 2443484/2443486 co-relation queries the response was YES. Maximal size of possible extension queue 417. Compared 44748 event pairs, 1133 based on Foata normal form. 3/7855 useless extension candidates. Maximal degree in co-relation 75585. Up to 7602 conditions per place. [2024-06-27 20:02:20,447 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 568 selfloop transitions, 87 changer transitions 0/658 dead transitions. [2024-06-27 20:02:20,447 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 658 transitions, 8572 flow [2024-06-27 20:02:20,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:20,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:20,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-27 20:02:20,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-27 20:02:20,448 INFO L175 Difference]: Start difference. First operand has 446 places, 620 transitions, 6762 flow. Second operand 10 states and 173 transitions. [2024-06-27 20:02:20,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 658 transitions, 8572 flow [2024-06-27 20:02:30,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 446 places, 658 transitions, 8360 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-27 20:02:30,362 INFO L231 Difference]: Finished difference. Result has 447 places, 626 transitions, 6862 flow [2024-06-27 20:02:30,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6550, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=536, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6862, PETRI_PLACES=447, PETRI_TRANSITIONS=626} [2024-06-27 20:02:30,363 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 404 predicate places. [2024-06-27 20:02:30,363 INFO L495 AbstractCegarLoop]: Abstraction has has 447 places, 626 transitions, 6862 flow [2024-06-27 20:02:30,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:30,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:30,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:30,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-27 20:02:30,363 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)] === [2024-06-27 20:02:30,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:30,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1286401775, now seen corresponding path program 2 times [2024-06-27 20:02:30,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:30,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512598153] [2024-06-27 20:02:30,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:30,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:30,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:31,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:31,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:31,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512598153] [2024-06-27 20:02:31,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [512598153] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:31,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:31,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-27 20:02:31,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1576787959] [2024-06-27 20:02:31,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:31,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-27 20:02:31,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:31,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-27 20:02:31,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-27 20:02:31,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:02:31,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 447 places, 626 transitions, 6862 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:31,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:31,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:02:31,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:33,283 INFO L124 PetriNetUnfolderBase]: 5208/7859 cut-off events. [2024-06-27 20:02:33,283 INFO L125 PetriNetUnfolderBase]: For 2478125/2478127 co-relation queries the response was YES. [2024-06-27 20:02:33,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76382 conditions, 7859 events. 5208/7859 cut-off events. For 2478125/2478127 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 44777 event pairs, 1133 based on Foata normal form. 3/7862 useless extension candidates. Maximal degree in co-relation 76160. Up to 7608 conditions per place. [2024-06-27 20:02:33,425 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 567 selfloop transitions, 85 changer transitions 0/655 dead transitions. [2024-06-27 20:02:33,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 456 places, 655 transitions, 8596 flow [2024-06-27 20:02:33,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:33,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:33,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-27 20:02:33,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3976190476190476 [2024-06-27 20:02:33,426 INFO L175 Difference]: Start difference. First operand has 447 places, 626 transitions, 6862 flow. Second operand 10 states and 167 transitions. [2024-06-27 20:02:33,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 456 places, 655 transitions, 8596 flow [2024-06-27 20:02:44,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 450 places, 655 transitions, 8367 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-27 20:02:44,343 INFO L231 Difference]: Finished difference. Result has 451 places, 629 transitions, 6880 flow [2024-06-27 20:02:44,343 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6671, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=544, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6880, PETRI_PLACES=451, PETRI_TRANSITIONS=629} [2024-06-27 20:02:44,344 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 408 predicate places. [2024-06-27 20:02:44,344 INFO L495 AbstractCegarLoop]: Abstraction has has 451 places, 629 transitions, 6880 flow [2024-06-27 20:02:44,344 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:44,344 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:44,344 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:44,344 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-27 20:02:44,344 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)] === [2024-06-27 20:02:44,345 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:44,345 INFO L85 PathProgramCache]: Analyzing trace with hash -376612645, now seen corresponding path program 1 times [2024-06-27 20:02:44,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:44,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104178491] [2024-06-27 20:02:44,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:44,345 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:44,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:45,282 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:45,282 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104178491] [2024-06-27 20:02:45,282 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104178491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:45,282 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:45,282 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:02:45,282 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932445614] [2024-06-27 20:02:45,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:45,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:02:45,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:45,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:02:45,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:02:45,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:02:45,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 451 places, 629 transitions, 6880 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:45,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:45,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:02:45,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:47,570 INFO L124 PetriNetUnfolderBase]: 5381/8118 cut-off events. [2024-06-27 20:02:47,570 INFO L125 PetriNetUnfolderBase]: For 2842697/2842699 co-relation queries the response was YES. [2024-06-27 20:02:47,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82779 conditions, 8118 events. 5381/8118 cut-off events. For 2842697/2842699 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 46285 event pairs, 961 based on Foata normal form. 6/8124 useless extension candidates. Maximal degree in co-relation 82555. Up to 6928 conditions per place. [2024-06-27 20:02:47,733 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 426 selfloop transitions, 254 changer transitions 0/683 dead transitions. [2024-06-27 20:02:47,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 460 places, 683 transitions, 9162 flow [2024-06-27 20:02:47,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:47,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:47,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 195 transitions. [2024-06-27 20:02:47,734 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-27 20:02:47,734 INFO L175 Difference]: Start difference. First operand has 451 places, 629 transitions, 6880 flow. Second operand 10 states and 195 transitions. [2024-06-27 20:02:47,734 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 460 places, 683 transitions, 9162 flow [2024-06-27 20:02:55,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 683 transitions, 9000 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-27 20:02:55,649 INFO L231 Difference]: Finished difference. Result has 454 places, 635 transitions, 7386 flow [2024-06-27 20:02:55,649 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6718, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=251, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7386, PETRI_PLACES=454, PETRI_TRANSITIONS=635} [2024-06-27 20:02:55,650 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 411 predicate places. [2024-06-27 20:02:55,650 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 635 transitions, 7386 flow [2024-06-27 20:02:55,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:55,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:02:55,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:02:55,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-27 20:02:55,650 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)] === [2024-06-27 20:02:55,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:02:55,651 INFO L85 PathProgramCache]: Analyzing trace with hash 1286410703, now seen corresponding path program 1 times [2024-06-27 20:02:55,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:02:55,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421586505] [2024-06-27 20:02:55,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:02:55,652 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:02:55,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:02:56,694 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:02:56,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:02:56,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421586505] [2024-06-27 20:02:56,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1421586505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:02:56,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:02:56,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:02:56,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732402102] [2024-06-27 20:02:56,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:02:56,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:02:56,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:02:56,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:02:56,695 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:02:56,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:02:56,809 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 635 transitions, 7386 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:02:56,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:02:56,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:02:56,809 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:02:59,391 INFO L124 PetriNetUnfolderBase]: 5427/8182 cut-off events. [2024-06-27 20:02:59,391 INFO L125 PetriNetUnfolderBase]: For 2907951/2907953 co-relation queries the response was YES. [2024-06-27 20:02:59,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84902 conditions, 8182 events. 5427/8182 cut-off events. For 2907951/2907953 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46812 event pairs, 1129 based on Foata normal form. 6/8188 useless extension candidates. Maximal degree in co-relation 84677. Up to 7249 conditions per place. [2024-06-27 20:02:59,528 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 426 selfloop transitions, 257 changer transitions 0/686 dead transitions. [2024-06-27 20:02:59,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 686 transitions, 9694 flow [2024-06-27 20:02:59,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-27 20:02:59,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-27 20:02:59,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 188 transitions. [2024-06-27 20:02:59,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44761904761904764 [2024-06-27 20:02:59,530 INFO L175 Difference]: Start difference. First operand has 454 places, 635 transitions, 7386 flow. Second operand 10 states and 188 transitions. [2024-06-27 20:02:59,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 686 transitions, 9694 flow [2024-06-27 20:03:10,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 686 transitions, 9158 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:10,410 INFO L231 Difference]: Finished difference. Result has 457 places, 647 transitions, 7627 flow [2024-06-27 20:03:10,410 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6855, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=385, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7627, PETRI_PLACES=457, PETRI_TRANSITIONS=647} [2024-06-27 20:03:10,410 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 414 predicate places. [2024-06-27 20:03:10,410 INFO L495 AbstractCegarLoop]: Abstraction has has 457 places, 647 transitions, 7627 flow [2024-06-27 20:03:10,410 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:10,411 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:10,411 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:10,411 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-27 20:03:10,411 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)] === [2024-06-27 20:03:10,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:10,411 INFO L85 PathProgramCache]: Analyzing trace with hash -368270545, now seen corresponding path program 2 times [2024-06-27 20:03:10,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:10,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941637436] [2024-06-27 20:03:10,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:10,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:10,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:11,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:11,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:11,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941637436] [2024-06-27 20:03:11,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941637436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:11,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:11,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:11,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112142105] [2024-06-27 20:03:11,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:11,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:11,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:11,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:11,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:11,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:03:11,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 457 places, 647 transitions, 7627 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:11,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:11,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:03:11,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:13,804 INFO L124 PetriNetUnfolderBase]: 5531/8342 cut-off events. [2024-06-27 20:03:13,805 INFO L125 PetriNetUnfolderBase]: For 3227810/3227812 co-relation queries the response was YES. [2024-06-27 20:03:13,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86807 conditions, 8342 events. 5531/8342 cut-off events. For 3227810/3227812 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47907 event pairs, 1174 based on Foata normal form. 30/8372 useless extension candidates. Maximal degree in co-relation 86581. Up to 7446 conditions per place. [2024-06-27 20:03:13,961 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 447 selfloop transitions, 246 changer transitions 0/696 dead transitions. [2024-06-27 20:03:13,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 468 places, 696 transitions, 9560 flow [2024-06-27 20:03:13,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:03:13,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:03:13,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 219 transitions. [2024-06-27 20:03:13,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43452380952380953 [2024-06-27 20:03:13,962 INFO L175 Difference]: Start difference. First operand has 457 places, 647 transitions, 7627 flow. Second operand 12 states and 219 transitions. [2024-06-27 20:03:13,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 468 places, 696 transitions, 9560 flow [2024-06-27 20:03:24,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 696 transitions, 9157 flow, removed 65 selfloop flow, removed 5 redundant places. [2024-06-27 20:03:24,201 INFO L231 Difference]: Finished difference. Result has 464 places, 650 transitions, 7803 flow [2024-06-27 20:03:24,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7224, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=647, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=243, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7803, PETRI_PLACES=464, PETRI_TRANSITIONS=650} [2024-06-27 20:03:24,202 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 421 predicate places. [2024-06-27 20:03:24,202 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 650 transitions, 7803 flow [2024-06-27 20:03:24,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:24,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:24,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:24,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-27 20:03:24,202 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)] === [2024-06-27 20:03:24,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:24,203 INFO L85 PathProgramCache]: Analyzing trace with hash -368280775, now seen corresponding path program 3 times [2024-06-27 20:03:24,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:24,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21452046] [2024-06-27 20:03:24,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:24,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:24,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:25,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:25,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21452046] [2024-06-27 20:03:25,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21452046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:25,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:25,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:25,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12230910] [2024-06-27 20:03:25,100 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:25,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:25,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:25,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:25,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:25,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:03:25,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 650 transitions, 7803 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:25,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:25,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:03:25,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:27,680 INFO L124 PetriNetUnfolderBase]: 5547/8366 cut-off events. [2024-06-27 20:03:27,680 INFO L125 PetriNetUnfolderBase]: For 2990099/2990101 co-relation queries the response was YES. [2024-06-27 20:03:27,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87807 conditions, 8366 events. 5547/8366 cut-off events. For 2990099/2990101 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 48082 event pairs, 1172 based on Foata normal form. 6/8372 useless extension candidates. Maximal degree in co-relation 87579. Up to 7422 conditions per place. [2024-06-27 20:03:27,835 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 444 selfloop transitions, 252 changer transitions 0/699 dead transitions. [2024-06-27 20:03:27,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 699 transitions, 9750 flow [2024-06-27 20:03:27,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-27 20:03:27,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-27 20:03:27,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 209 transitions. [2024-06-27 20:03:27,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-27 20:03:27,837 INFO L175 Difference]: Start difference. First operand has 464 places, 650 transitions, 7803 flow. Second operand 11 states and 209 transitions. [2024-06-27 20:03:27,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 699 transitions, 9750 flow [2024-06-27 20:03:40,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 699 transitions, 9241 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-27 20:03:40,956 INFO L231 Difference]: Finished difference. Result has 465 places, 653 transitions, 7889 flow [2024-06-27 20:03:40,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7294, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=650, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=249, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7889, PETRI_PLACES=465, PETRI_TRANSITIONS=653} [2024-06-27 20:03:40,957 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 422 predicate places. [2024-06-27 20:03:40,957 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 653 transitions, 7889 flow [2024-06-27 20:03:40,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:40,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:40,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:40,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-27 20:03:40,957 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)] === [2024-06-27 20:03:40,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:40,958 INFO L85 PathProgramCache]: Analyzing trace with hash -81382843, now seen corresponding path program 2 times [2024-06-27 20:03:40,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:40,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057050415] [2024-06-27 20:03:40,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:40,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:40,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:42,069 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:42,069 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:42,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057050415] [2024-06-27 20:03:42,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057050415] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:42,070 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:42,070 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-27 20:03:42,070 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760932587] [2024-06-27 20:03:42,070 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:42,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-27 20:03:42,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:42,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-27 20:03:42,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-27 20:03:42,226 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:03:42,226 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 653 transitions, 7889 flow. Second operand has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:42,226 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:42,226 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:03:42,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:03:44,936 INFO L124 PetriNetUnfolderBase]: 5567/8394 cut-off events. [2024-06-27 20:03:44,936 INFO L125 PetriNetUnfolderBase]: For 3026031/3026033 co-relation queries the response was YES. [2024-06-27 20:03:45,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88142 conditions, 8394 events. 5567/8394 cut-off events. For 3026031/3026033 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 48317 event pairs, 1186 based on Foata normal form. 6/8400 useless extension candidates. Maximal degree in co-relation 87913. Up to 7758 conditions per place. [2024-06-27 20:03:45,114 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 493 selfloop transitions, 195 changer transitions 0/691 dead transitions. [2024-06-27 20:03:45,114 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 691 transitions, 9437 flow [2024-06-27 20:03:45,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-27 20:03:45,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-27 20:03:45,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 203 transitions. [2024-06-27 20:03:45,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4027777777777778 [2024-06-27 20:03:45,115 INFO L175 Difference]: Start difference. First operand has 465 places, 653 transitions, 7889 flow. Second operand 12 states and 203 transitions. [2024-06-27 20:03:45,115 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 691 transitions, 9437 flow [2024-06-27 20:03:58,178 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 468 places, 691 transitions, 8929 flow, removed 33 selfloop flow, removed 8 redundant places. [2024-06-27 20:03:58,185 INFO L231 Difference]: Finished difference. Result has 470 places, 659 transitions, 7889 flow [2024-06-27 20:03:58,185 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7383, PETRI_DIFFERENCE_MINUEND_PLACES=457, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=653, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7889, PETRI_PLACES=470, PETRI_TRANSITIONS=659} [2024-06-27 20:03:58,185 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 427 predicate places. [2024-06-27 20:03:58,185 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 659 transitions, 7889 flow [2024-06-27 20:03:58,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 9.545454545454545) internal successors, (105), 11 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:58,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-27 20:03:58,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-27 20:03:58,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-27 20:03:58,186 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)] === [2024-06-27 20:03:58,186 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-27 20:03:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash 650997654, now seen corresponding path program 1 times [2024-06-27 20:03:58,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-27 20:03:58,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1260652554] [2024-06-27 20:03:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-27 20:03:58,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-27 20:03:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-27 20:03:58,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-27 20:03:58,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-27 20:03:58,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1260652554] [2024-06-27 20:03:58,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1260652554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-27 20:03:58,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-27 20:03:58,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-27 20:03:58,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716003590] [2024-06-27 20:03:58,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-27 20:03:58,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-27 20:03:58,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-27 20:03:58,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-27 20:03:58,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-27 20:03:58,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-27 20:03:58,972 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 659 transitions, 7889 flow. Second operand has 10 states, 10 states have (on average 9.6) internal successors, (96), 10 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-27 20:03:58,972 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-27 20:03:58,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-27 20:03:58,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-27 20:04:01,177 INFO L124 PetriNetUnfolderBase]: 5588/8424 cut-off events. [2024-06-27 20:04:01,178 INFO L125 PetriNetUnfolderBase]: For 3049618/3049620 co-relation queries the response was YES. [2024-06-27 20:04:01,300 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88687 conditions, 8424 events. 5588/8424 cut-off events. For 3049618/3049620 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 48489 event pairs, 1223 based on Foata normal form. 3/8427 useless extension candidates. Maximal degree in co-relation 88456. Up to 8075 conditions per place. [2024-06-27 20:04:01,336 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 578 selfloop transitions, 116 changer transitions 0/697 dead transitions. [2024-06-27 20:04:01,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 478 places, 697 transitions, 10110 flow [2024-06-27 20:04:01,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-27 20:04:01,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-27 20:04:01,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-27 20:04:01,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-27 20:04:01,338 INFO L175 Difference]: Start difference. First operand has 470 places, 659 transitions, 7889 flow. Second operand 9 states and 160 transitions. [2024-06-27 20:04:01,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 478 places, 697 transitions, 10110 flow Killed by 15