./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe004_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.2024-05-21_14-57-05.files/protection/safe004_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe004_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/safe004_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-cde23df-m [2024-06-14 12:56:06,678 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:56:06,736 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:56:06,739 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:56:06,739 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:56:06,754 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:56:06,754 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:56:06,755 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:56:06,755 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:56:06,756 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:56:06,756 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:56:06,756 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:56:06,757 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:56:06,757 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:56:06,757 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:56:06,757 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:56:06,759 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:56:06,761 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:56:06,762 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:56:06,762 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:56:06,762 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:56:06,764 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:56:06,764 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:56:06,764 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:56:06,764 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:56:06,765 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:56:06,765 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:56:06,765 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:56:06,765 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:56:06,765 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:56:06,766 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:56:06,766 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:56:06,766 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:56:06,767 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:56:06,767 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:56:06,767 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:56:06,768 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:56:06,768 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:56:06,768 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:56:06,768 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:56:06,768 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:56:06,769 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:56:06,769 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:56:06,770 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:56:06,960 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:56:07,002 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:56:07,004 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:56:07,005 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:56:07,010 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:56:07,011 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe004_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 12:56:07,193 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:56:07,193 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:56:07,194 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:56:08,246 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:56:08,426 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:56:08,427 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:56:08,436 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d97c845ca/b758ace993374cc9bc2803e99e2504b8/FLAGe57b24587 [2024-06-14 12:56:08,447 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d97c845ca/b758ace993374cc9bc2803e99e2504b8 [2024-06-14 12:56:08,448 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:56:08,449 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:56:08,450 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:56:08,450 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:56:08,454 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:56:08,454 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:56:07" (1/2) ... [2024-06-14 12:56:08,455 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f222794 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:08, skipping insertion in model container [2024-06-14 12:56:08,455 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:56:07" (1/2) ... [2024-06-14 12:56:08,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@7183c7e8 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:56:08, skipping insertion in model container [2024-06-14 12:56:08,456 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:56:08" (2/2) ... [2024-06-14 12:56:08,456 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6f222794 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:08, skipping insertion in model container [2024-06-14 12:56:08,456 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:56:08" (2/2) ... [2024-06-14 12:56:08,457 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:56:08,531 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:56:08,532 INFO L97 edCorrectnessWitness]: Location invariant before [L847-L847] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) [2024-06-14 12:56:08,532 INFO L97 edCorrectnessWitness]: Location invariant before [L849-L849] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) [2024-06-14 12:56:08,532 INFO L97 edCorrectnessWitness]: Location invariant before [L850-L850] ((((((((((((((((! multithreaded || y$r_buff0_thd2 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || y$flush_delayed == (_Bool)0)) && (! multithreaded || y$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= y$mem_tmp && y$mem_tmp <= 2) && y$mem_tmp <= 127) && ((y$mem_tmp == 0 || y$mem_tmp == 1) || y$mem_tmp == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || y$read_delayed_var == 0)) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || y$read_delayed == (_Bool)0)) && (! multithreaded || ((((0 <= y$w_buff0 && y$w_buff0 <= 2) && y$w_buff0 <= 127) && y$w_buff0 % 2 == 0) && (y$w_buff0 == 0 || y$w_buff0 == 2)))) && (! multithreaded || ((((0 <= y$w_buff1 && y$w_buff1 <= 2) && y$w_buff1 <= 127) && y$w_buff1 % 2 == 0) && (y$w_buff1 == 0 || y$w_buff1 == 2)))) && (! multithreaded || y$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || y$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || y$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || y$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2))) [2024-06-14 12:56:08,532 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:56:08,532 INFO L106 edCorrectnessWitness]: ghost_update [L845-L845] multithreaded = 1; [2024-06-14 12:56:08,570 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:56:08,950 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:56:08,960 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:56:09,057 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:56:09,084 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:56:09,084 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09 WrapperNode [2024-06-14 12:56:09,084 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:56:09,085 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:56:09,085 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:56:09,085 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:56:09,091 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,104 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,141 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-14 12:56:09,142 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:56:09,142 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:56:09,142 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:56:09,143 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:56:09,151 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,154 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,185 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]. [2024-06-14 12:56:09,185 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,185 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,193 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,195 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,196 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,198 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,201 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:56:09,201 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:56:09,201 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:56:09,202 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:56:09,202 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (1/1) ... [2024-06-14 12:56:09,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:56:09,212 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:56:09,241 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) [2024-06-14 12:56:09,257 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 [2024-06-14 12:56:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:56:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:56:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:56:09,271 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:56:09,271 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:56:09,271 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:56:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:56:09,272 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:56:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:56:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:56:09,272 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:56:09,272 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:56:09,273 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 12:56:09,414 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:56:09,416 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:56:09,779 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:56:09,779 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:56:09,947 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:56:09,948 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:56:09,949 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:56:09 BoogieIcfgContainer [2024-06-14 12:56:09,949 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:56:09,951 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:56:09,951 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:56:09,953 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:56:09,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:56:07" (1/4) ... [2024-06-14 12:56:09,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c346a37 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:56:09, skipping insertion in model container [2024-06-14 12:56:09,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:56:08" (2/4) ... [2024-06-14 12:56:09,954 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c346a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:56:09, skipping insertion in model container [2024-06-14 12:56:09,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:56:09" (3/4) ... [2024-06-14 12:56:09,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6c346a37 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:56:09, skipping insertion in model container [2024-06-14 12:56:09,955 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:56:09" (4/4) ... [2024-06-14 12:56:09,956 INFO L112 eAbstractionObserver]: Analyzing ICFG safe004_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:56:09,970 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:56:09,971 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:56:09,971 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:56:10,011 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:56:10,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:56:10,067 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 12:56:10,068 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:56:10,069 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:56:10,069 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 12:56:10,072 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 12:56:10,082 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:56:10,089 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;@14812aba, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:56:10,089 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:56:10,094 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:56:10,094 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:56:10,094 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:56:10,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:10,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:56:10,095 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)] === [2024-06-14 12:56:10,099 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:10,099 INFO L85 PathProgramCache]: Analyzing trace with hash 768558868, now seen corresponding path program 1 times [2024-06-14 12:56:10,106 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:10,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596346082] [2024-06-14 12:56:10,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:10,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:10,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:11,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:11,112 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596346082] [2024-06-14 12:56:11,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596346082] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:11,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:11,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:56:11,114 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323233848] [2024-06-14 12:56:11,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:11,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:56:11,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:11,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:56:11,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:56:11,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:11,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:11,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:11,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:11,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:11,563 INFO L124 PetriNetUnfolderBase]: 1650/2466 cut-off events. [2024-06-14 12:56:11,564 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:56:11,569 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5020 conditions, 2466 events. 1650/2466 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11597 event pairs, 881 based on Foata normal form. 4/2429 useless extension candidates. Maximal degree in co-relation 5005. Up to 2444 conditions per place. [2024-06-14 12:56:11,578 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 38 selfloop transitions, 4 changer transitions 0/45 dead transitions. [2024-06-14 12:56:11,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 45 transitions, 189 flow [2024-06-14 12:56:11,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:56:11,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:56:11,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-06-14 12:56:11,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 12:56:11,588 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 69 transitions. [2024-06-14 12:56:11,589 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 45 transitions, 189 flow [2024-06-14 12:56:11,590 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 45 transitions, 184 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:11,592 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 12:56:11,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 12:56:11,595 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 12:56:11,595 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 12:56:11,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 10.0) internal successors, (30), 3 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:11,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:11,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:11,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:56:11,596 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)] === [2024-06-14 12:56:11,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:11,597 INFO L85 PathProgramCache]: Analyzing trace with hash -149255181, now seen corresponding path program 1 times [2024-06-14 12:56:11,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:11,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645591558] [2024-06-14 12:56:11,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:11,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:11,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:12,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:12,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:12,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645591558] [2024-06-14 12:56:12,313 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645591558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:12,313 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:12,313 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:56:12,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995109210] [2024-06-14 12:56:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:12,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:56:12,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:12,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:56:12,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:56:12,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:12,343 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:12,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:12,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:12,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:12,693 INFO L124 PetriNetUnfolderBase]: 1659/2478 cut-off events. [2024-06-14 12:56:12,693 INFO L125 PetriNetUnfolderBase]: For 376/376 co-relation queries the response was YES. [2024-06-14 12:56:12,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5690 conditions, 2478 events. 1659/2478 cut-off events. For 376/376 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11335 event pairs, 955 based on Foata normal form. 6/2483 useless extension candidates. Maximal degree in co-relation 5675. Up to 2441 conditions per place. [2024-06-14 12:56:12,704 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 48 selfloop transitions, 7 changer transitions 0/58 dead transitions. [2024-06-14 12:56:12,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 58 transitions, 274 flow [2024-06-14 12:56:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:56:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:56:12,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-06-14 12:56:12,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 12:56:12,708 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 87 transitions. [2024-06-14 12:56:12,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 58 transitions, 274 flow [2024-06-14 12:56:12,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 58 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:56:12,710 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 156 flow [2024-06-14 12:56:12,710 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=156, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 12:56:12,711 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 12:56:12,711 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 156 flow [2024-06-14 12:56:12,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.75) internal successors, (39), 4 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:12,712 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:12,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:12,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:56:12,714 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)] === [2024-06-14 12:56:12,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:12,715 INFO L85 PathProgramCache]: Analyzing trace with hash -331941767, now seen corresponding path program 1 times [2024-06-14 12:56:12,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:12,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [233462738] [2024-06-14 12:56:12,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:12,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:12,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:13,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:13,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:13,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [233462738] [2024-06-14 12:56:13,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [233462738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:13,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:13,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:56:13,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062955300] [2024-06-14 12:56:13,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:13,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:56:13,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:13,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:56:13,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:56:13,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:13,638 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 156 flow. Second operand has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:13,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:13,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:13,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:13,983 INFO L124 PetriNetUnfolderBase]: 1751/2608 cut-off events. [2024-06-14 12:56:13,984 INFO L125 PetriNetUnfolderBase]: For 1276/1276 co-relation queries the response was YES. [2024-06-14 12:56:13,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6762 conditions, 2608 events. 1751/2608 cut-off events. For 1276/1276 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12092 event pairs, 770 based on Foata normal form. 11/2618 useless extension candidates. Maximal degree in co-relation 6744. Up to 2426 conditions per place. [2024-06-14 12:56:13,996 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 64 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2024-06-14 12:56:13,996 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 83 transitions, 450 flow [2024-06-14 12:56:13,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:56:13,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:56:13,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 116 transitions. [2024-06-14 12:56:13,998 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5658536585365853 [2024-06-14 12:56:13,998 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 156 flow. Second operand 5 states and 116 transitions. [2024-06-14 12:56:13,998 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 83 transitions, 450 flow [2024-06-14 12:56:14,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 83 transitions, 440 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 12:56:14,001 INFO L231 Difference]: Finished difference. Result has 52 places, 52 transitions, 259 flow [2024-06-14 12:56:14,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=259, PETRI_PLACES=52, PETRI_TRANSITIONS=52} [2024-06-14 12:56:14,002 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 10 predicate places. [2024-06-14 12:56:14,002 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 52 transitions, 259 flow [2024-06-14 12:56:14,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 9.6) internal successors, (48), 5 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:14,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:14,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:14,003 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:56:14,003 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)] === [2024-06-14 12:56:14,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:14,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1700258606, now seen corresponding path program 1 times [2024-06-14 12:56:14,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:14,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700133823] [2024-06-14 12:56:14,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:14,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:14,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:15,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:15,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:15,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700133823] [2024-06-14 12:56:15,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700133823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:15,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:15,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:56:15,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883571018] [2024-06-14 12:56:15,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:15,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:56:15,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:15,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:56:15,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:56:15,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:15,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 52 transitions, 259 flow. Second operand has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2024-06-14 12:56:15,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:15,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:15,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:15,579 INFO L124 PetriNetUnfolderBase]: 1795/2671 cut-off events. [2024-06-14 12:56:15,580 INFO L125 PetriNetUnfolderBase]: For 3250/3252 co-relation queries the response was YES. [2024-06-14 12:56:15,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8253 conditions, 2671 events. 1795/2671 cut-off events. For 3250/3252 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12344 event pairs, 628 based on Foata normal form. 13/2683 useless extension candidates. Maximal degree in co-relation 8231. Up to 2437 conditions per place. [2024-06-14 12:56:15,594 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 72 selfloop transitions, 22 changer transitions 0/97 dead transitions. [2024-06-14 12:56:15,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 97 transitions, 603 flow [2024-06-14 12:56:15,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:15,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:15,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 12:56:15,599 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 12:56:15,599 INFO L175 Difference]: Start difference. First operand has 52 places, 52 transitions, 259 flow. Second operand 6 states and 138 transitions. [2024-06-14 12:56:15,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 97 transitions, 603 flow [2024-06-14 12:56:15,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 97 transitions, 595 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:56:15,613 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 350 flow [2024-06-14 12:56:15,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=350, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-06-14 12:56:15,614 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 12:56:15,614 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 350 flow [2024-06-14 12:56:15,614 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.5) internal successors, (57), 6 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) [2024-06-14 12:56:15,614 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:15,615 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:15,615 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:56:15,615 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)] === [2024-06-14 12:56:15,615 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:15,615 INFO L85 PathProgramCache]: Analyzing trace with hash -1168407624, now seen corresponding path program 1 times [2024-06-14 12:56:15,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:15,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083071295] [2024-06-14 12:56:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:16,697 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:16,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:16,698 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083071295] [2024-06-14 12:56:16,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083071295] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:16,698 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:16,698 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:16,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233514916] [2024-06-14 12:56:16,699 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:16,699 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:16,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:16,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:16,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:16,751 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 12:56:16,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 350 flow. Second operand has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-14 12:56:16,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:16,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 12:56:16,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:17,446 INFO L124 PetriNetUnfolderBase]: 1930/2884 cut-off events. [2024-06-14 12:56:17,447 INFO L125 PetriNetUnfolderBase]: For 5527/5529 co-relation queries the response was YES. [2024-06-14 12:56:17,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10144 conditions, 2884 events. 1930/2884 cut-off events. For 5527/5529 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13676 event pairs, 484 based on Foata normal form. 40/2923 useless extension candidates. Maximal degree in co-relation 10119. Up to 2460 conditions per place. [2024-06-14 12:56:17,463 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 81 selfloop transitions, 26 changer transitions 0/110 dead transitions. [2024-06-14 12:56:17,463 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 110 transitions, 758 flow [2024-06-14 12:56:17,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:17,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:17,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 12:56:17,464 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 12:56:17,464 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 350 flow. Second operand 7 states and 159 transitions. [2024-06-14 12:56:17,465 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 110 transitions, 758 flow [2024-06-14 12:56:17,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 110 transitions, 703 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:17,470 INFO L231 Difference]: Finished difference. Result has 60 places, 61 transitions, 384 flow [2024-06-14 12:56:17,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=60, PETRI_TRANSITIONS=61} [2024-06-14 12:56:17,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 12:56:17,471 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 61 transitions, 384 flow [2024-06-14 12:56:17,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.428571428571429) internal successors, (66), 7 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) [2024-06-14 12:56:17,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:17,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:17,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:56:17,471 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)] === [2024-06-14 12:56:17,472 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:17,472 INFO L85 PathProgramCache]: Analyzing trace with hash -2123205461, now seen corresponding path program 1 times [2024-06-14 12:56:17,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:17,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079488587] [2024-06-14 12:56:17,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:17,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:17,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:18,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:18,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:18,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079488587] [2024-06-14 12:56:18,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079488587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:18,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:18,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:56:18,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492502906] [2024-06-14 12:56:18,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:18,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:56:18,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:18,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:56:18,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:56:18,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:18,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 61 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:18,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:18,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:18,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:18,586 INFO L124 PetriNetUnfolderBase]: 1916/2864 cut-off events. [2024-06-14 12:56:18,587 INFO L125 PetriNetUnfolderBase]: For 7093/7093 co-relation queries the response was YES. [2024-06-14 12:56:18,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10875 conditions, 2864 events. 1916/2864 cut-off events. For 7093/7093 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13337 event pairs, 761 based on Foata normal form. 5/2868 useless extension candidates. Maximal degree in co-relation 10849. Up to 2818 conditions per place. [2024-06-14 12:56:18,607 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 64 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-14 12:56:18,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 79 transitions, 604 flow [2024-06-14 12:56:18,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:56:18,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:56:18,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2024-06-14 12:56:18,609 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4292682926829268 [2024-06-14 12:56:18,609 INFO L175 Difference]: Start difference. First operand has 60 places, 61 transitions, 384 flow. Second operand 5 states and 88 transitions. [2024-06-14 12:56:18,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 79 transitions, 604 flow [2024-06-14 12:56:18,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 79 transitions, 553 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:18,614 INFO L231 Difference]: Finished difference. Result has 60 places, 64 transitions, 398 flow [2024-06-14 12:56:18,614 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=398, PETRI_PLACES=60, PETRI_TRANSITIONS=64} [2024-06-14 12:56:18,616 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 18 predicate places. [2024-06-14 12:56:18,616 INFO L495 AbstractCegarLoop]: Abstraction has has 60 places, 64 transitions, 398 flow [2024-06-14 12:56:18,616 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 8.666666666666666) internal successors, (52), 6 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:18,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:18,617 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:18,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:56:18,617 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)] === [2024-06-14 12:56:18,617 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:18,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1395089477, now seen corresponding path program 1 times [2024-06-14 12:56:18,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:18,621 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142887764] [2024-06-14 12:56:18,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:18,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:18,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:19,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:19,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142887764] [2024-06-14 12:56:19,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142887764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:19,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:19,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:19,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375659536] [2024-06-14 12:56:19,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:19,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:19,204 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:19,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:19,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:19,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:19,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 64 transitions, 398 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:19,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:19,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:19,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:19,774 INFO L124 PetriNetUnfolderBase]: 1906/2850 cut-off events. [2024-06-14 12:56:19,775 INFO L125 PetriNetUnfolderBase]: For 8262/8262 co-relation queries the response was YES. [2024-06-14 12:56:19,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11058 conditions, 2850 events. 1906/2850 cut-off events. For 8262/8262 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13314 event pairs, 738 based on Foata normal form. 4/2853 useless extension candidates. Maximal degree in co-relation 11030. Up to 2810 conditions per place. [2024-06-14 12:56:19,789 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 69 selfloop transitions, 11 changer transitions 0/83 dead transitions. [2024-06-14 12:56:19,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 83 transitions, 618 flow [2024-06-14 12:56:19,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:19,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:19,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 12:56:19,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 12:56:19,790 INFO L175 Difference]: Start difference. First operand has 60 places, 64 transitions, 398 flow. Second operand 6 states and 97 transitions. [2024-06-14 12:56:19,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 83 transitions, 618 flow [2024-06-14 12:56:19,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 83 transitions, 593 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:19,795 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 429 flow [2024-06-14 12:56:19,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=373, PETRI_DIFFERENCE_MINUEND_PLACES=57, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=429, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-14 12:56:19,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-14 12:56:19,797 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 429 flow [2024-06-14 12:56:19,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:19,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:19,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:19,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:56:19,797 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)] === [2024-06-14 12:56:19,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:19,798 INFO L85 PathProgramCache]: Analyzing trace with hash -497761048, now seen corresponding path program 1 times [2024-06-14 12:56:19,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:19,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038034785] [2024-06-14 12:56:19,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:19,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:19,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:20,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:20,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:20,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038034785] [2024-06-14 12:56:20,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038034785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:20,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:20,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:20,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485436769] [2024-06-14 12:56:20,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:20,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:20,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:20,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:20,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:20,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:20,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 429 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:20,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:20,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:20,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:21,065 INFO L124 PetriNetUnfolderBase]: 1918/2869 cut-off events. [2024-06-14 12:56:21,065 INFO L125 PetriNetUnfolderBase]: For 10142/10146 co-relation queries the response was YES. [2024-06-14 12:56:21,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11652 conditions, 2869 events. 1918/2869 cut-off events. For 10142/10146 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13439 event pairs, 628 based on Foata normal form. 14/2882 useless extension candidates. Maximal degree in co-relation 11623. Up to 2675 conditions per place. [2024-06-14 12:56:21,079 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 74 selfloop transitions, 19 changer transitions 0/96 dead transitions. [2024-06-14 12:56:21,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 96 transitions, 755 flow [2024-06-14 12:56:21,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:21,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:21,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:56:21,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:56:21,081 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 429 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:56:21,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 96 transitions, 755 flow [2024-06-14 12:56:21,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 96 transitions, 719 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:21,088 INFO L231 Difference]: Finished difference. Result has 65 places, 70 transitions, 465 flow [2024-06-14 12:56:21,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=393, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=465, PETRI_PLACES=65, PETRI_TRANSITIONS=70} [2024-06-14 12:56:21,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 23 predicate places. [2024-06-14 12:56:21,091 INFO L495 AbstractCegarLoop]: Abstraction has has 65 places, 70 transitions, 465 flow [2024-06-14 12:56:21,091 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:21,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:21,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:21,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:56:21,092 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)] === [2024-06-14 12:56:21,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:21,092 INFO L85 PathProgramCache]: Analyzing trace with hash -290957878, now seen corresponding path program 2 times [2024-06-14 12:56:21,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:21,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154227700] [2024-06-14 12:56:21,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:21,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:21,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:21,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:21,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:21,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154227700] [2024-06-14 12:56:21,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154227700] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:21,714 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:21,714 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:21,714 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43099868] [2024-06-14 12:56:21,714 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:21,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:21,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:21,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:21,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:21,779 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:21,780 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 70 transitions, 465 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:21,780 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:21,780 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:21,780 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:22,224 INFO L124 PetriNetUnfolderBase]: 1863/2780 cut-off events. [2024-06-14 12:56:22,224 INFO L125 PetriNetUnfolderBase]: For 11331/11331 co-relation queries the response was YES. [2024-06-14 12:56:22,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11620 conditions, 2780 events. 1863/2780 cut-off events. For 11331/11331 co-relation queries the response was YES. Maximal size of possible extension queue 128. Compared 12883 event pairs, 727 based on Foata normal form. 5/2784 useless extension candidates. Maximal degree in co-relation 11591. Up to 2740 conditions per place. [2024-06-14 12:56:22,241 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 74 selfloop transitions, 11 changer transitions 0/88 dead transitions. [2024-06-14 12:56:22,242 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 693 flow [2024-06-14 12:56:22,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:56:22,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:56:22,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-14 12:56:22,243 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 12:56:22,243 INFO L175 Difference]: Start difference. First operand has 65 places, 70 transitions, 465 flow. Second operand 6 states and 99 transitions. [2024-06-14 12:56:22,243 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 693 flow [2024-06-14 12:56:22,250 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 88 transitions, 664 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:22,251 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 466 flow [2024-06-14 12:56:22,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=436, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=466, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-14 12:56:22,252 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 26 predicate places. [2024-06-14 12:56:22,252 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 466 flow [2024-06-14 12:56:22,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:22,253 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:22,253 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:22,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:56:22,253 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)] === [2024-06-14 12:56:22,254 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:22,254 INFO L85 PathProgramCache]: Analyzing trace with hash -657832742, now seen corresponding path program 1 times [2024-06-14 12:56:22,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:22,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73357804] [2024-06-14 12:56:22,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:22,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:22,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:23,044 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:23,044 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73357804] [2024-06-14 12:56:23,044 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73357804] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:23,044 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:23,044 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:23,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906449939] [2024-06-14 12:56:23,045 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:23,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:23,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:23,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:23,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:23,092 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:23,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 466 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:23,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:23,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:23,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:23,575 INFO L124 PetriNetUnfolderBase]: 1967/2934 cut-off events. [2024-06-14 12:56:23,575 INFO L125 PetriNetUnfolderBase]: For 13905/13905 co-relation queries the response was YES. [2024-06-14 12:56:23,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12338 conditions, 2934 events. 1967/2934 cut-off events. For 13905/13905 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13636 event pairs, 545 based on Foata normal form. 12/2944 useless extension candidates. Maximal degree in co-relation 12308. Up to 2574 conditions per place. [2024-06-14 12:56:23,590 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 96 selfloop transitions, 28 changer transitions 0/127 dead transitions. [2024-06-14 12:56:23,590 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 127 transitions, 1045 flow [2024-06-14 12:56:23,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:23,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:23,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2024-06-14 12:56:23,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45993031358885017 [2024-06-14 12:56:23,592 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 466 flow. Second operand 7 states and 132 transitions. [2024-06-14 12:56:23,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 127 transitions, 1045 flow [2024-06-14 12:56:23,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 127 transitions, 979 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:23,601 INFO L231 Difference]: Finished difference. Result has 71 places, 88 transitions, 649 flow [2024-06-14 12:56:23,601 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=419, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=649, PETRI_PLACES=71, PETRI_TRANSITIONS=88} [2024-06-14 12:56:23,602 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 29 predicate places. [2024-06-14 12:56:23,602 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 88 transitions, 649 flow [2024-06-14 12:56:23,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:23,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:23,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:23,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:56:23,602 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)] === [2024-06-14 12:56:23,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:23,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1091122998, now seen corresponding path program 2 times [2024-06-14 12:56:23,603 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:23,603 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305807884] [2024-06-14 12:56:23,603 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:23,603 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:23,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:24,277 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:24,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:24,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305807884] [2024-06-14 12:56:24,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305807884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:24,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:24,278 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:24,278 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892633662] [2024-06-14 12:56:24,278 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:24,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:24,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:24,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:24,279 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:24,333 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:24,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 88 transitions, 649 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:24,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:24,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:24,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:24,820 INFO L124 PetriNetUnfolderBase]: 1989/2964 cut-off events. [2024-06-14 12:56:24,820 INFO L125 PetriNetUnfolderBase]: For 16920/16920 co-relation queries the response was YES. [2024-06-14 12:56:24,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13725 conditions, 2964 events. 1989/2964 cut-off events. For 16920/16920 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13797 event pairs, 600 based on Foata normal form. 4/2967 useless extension candidates. Maximal degree in co-relation 13692. Up to 2906 conditions per place. [2024-06-14 12:56:24,838 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 94 selfloop transitions, 17 changer transitions 0/114 dead transitions. [2024-06-14 12:56:24,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 114 transitions, 966 flow [2024-06-14 12:56:24,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:24,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:24,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:56:24,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:56:24,840 INFO L175 Difference]: Start difference. First operand has 71 places, 88 transitions, 649 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:56:24,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 114 transitions, 966 flow [2024-06-14 12:56:24,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 114 transitions, 922 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:24,855 INFO L231 Difference]: Finished difference. Result has 77 places, 94 transitions, 704 flow [2024-06-14 12:56:24,855 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=611, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=88, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=704, PETRI_PLACES=77, PETRI_TRANSITIONS=94} [2024-06-14 12:56:24,856 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 35 predicate places. [2024-06-14 12:56:24,856 INFO L495 AbstractCegarLoop]: Abstraction has has 77 places, 94 transitions, 704 flow [2024-06-14 12:56:24,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:24,856 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:24,856 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:24,856 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:56:24,856 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)] === [2024-06-14 12:56:24,857 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:24,857 INFO L85 PathProgramCache]: Analyzing trace with hash 1926409230, now seen corresponding path program 3 times [2024-06-14 12:56:24,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:24,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387665402] [2024-06-14 12:56:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:24,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:24,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:25,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:25,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:25,504 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387665402] [2024-06-14 12:56:25,504 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387665402] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:25,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:25,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:25,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673231400] [2024-06-14 12:56:25,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:25,505 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:25,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:25,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:25,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:25,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:25,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 94 transitions, 704 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:25,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:25,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:25,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:26,081 INFO L124 PetriNetUnfolderBase]: 1995/2973 cut-off events. [2024-06-14 12:56:26,081 INFO L125 PetriNetUnfolderBase]: For 19177/19177 co-relation queries the response was YES. [2024-06-14 12:56:26,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14193 conditions, 2973 events. 1995/2973 cut-off events. For 19177/19177 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13799 event pairs, 598 based on Foata normal form. 4/2976 useless extension candidates. Maximal degree in co-relation 14157. Up to 2877 conditions per place. [2024-06-14 12:56:26,099 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 23 changer transitions 0/125 dead transitions. [2024-06-14 12:56:26,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 125 transitions, 1129 flow [2024-06-14 12:56:26,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:26,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:26,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:56:26,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:56:26,100 INFO L175 Difference]: Start difference. First operand has 77 places, 94 transitions, 704 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:56:26,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 125 transitions, 1129 flow [2024-06-14 12:56:26,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 125 transitions, 1097 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:26,114 INFO L231 Difference]: Finished difference. Result has 82 places, 102 transitions, 824 flow [2024-06-14 12:56:26,114 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=672, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=94, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=824, PETRI_PLACES=82, PETRI_TRANSITIONS=102} [2024-06-14 12:56:26,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-14 12:56:26,115 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 102 transitions, 824 flow [2024-06-14 12:56:26,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:26,115 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:26,115 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:26,115 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:56:26,115 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:26,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:26,116 INFO L85 PathProgramCache]: Analyzing trace with hash -651157574, now seen corresponding path program 1 times [2024-06-14 12:56:26,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:26,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585376436] [2024-06-14 12:56:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:26,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:26,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:27,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:27,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:27,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585376436] [2024-06-14 12:56:27,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585376436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:27,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:27,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:27,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803166305] [2024-06-14 12:56:27,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:27,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:27,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:27,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:27,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:27,094 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:27,095 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 102 transitions, 824 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 12:56:27,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:27,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:27,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:27,687 INFO L124 PetriNetUnfolderBase]: 1987/2961 cut-off events. [2024-06-14 12:56:27,687 INFO L125 PetriNetUnfolderBase]: For 21677/21677 co-relation queries the response was YES. [2024-06-14 12:56:27,693 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14547 conditions, 2961 events. 1987/2961 cut-off events. For 21677/21677 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 13746 event pairs, 579 based on Foata normal form. 4/2964 useless extension candidates. Maximal degree in co-relation 14509. Up to 2903 conditions per place. [2024-06-14 12:56:27,700 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 106 selfloop transitions, 15 changer transitions 0/124 dead transitions. [2024-06-14 12:56:27,700 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 124 transitions, 1140 flow [2024-06-14 12:56:27,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:27,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:27,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-14 12:56:27,701 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3867595818815331 [2024-06-14 12:56:27,701 INFO L175 Difference]: Start difference. First operand has 82 places, 102 transitions, 824 flow. Second operand 7 states and 111 transitions. [2024-06-14 12:56:27,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 124 transitions, 1140 flow [2024-06-14 12:56:27,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 124 transitions, 1106 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:27,717 INFO L231 Difference]: Finished difference. Result has 86 places, 104 transitions, 855 flow [2024-06-14 12:56:27,717 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=790, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=855, PETRI_PLACES=86, PETRI_TRANSITIONS=104} [2024-06-14 12:56:27,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-14 12:56:27,717 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 104 transitions, 855 flow [2024-06-14 12:56:27,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 12:56:27,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:27,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:27,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:56:27,718 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)] === [2024-06-14 12:56:27,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:27,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1610780025, now seen corresponding path program 1 times [2024-06-14 12:56:27,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:27,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1220139247] [2024-06-14 12:56:27,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:27,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:27,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:28,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:28,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:28,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1220139247] [2024-06-14 12:56:28,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1220139247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:28,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:28,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:28,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597272145] [2024-06-14 12:56:28,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:28,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:28,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:28,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:28,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:28,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:28,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 104 transitions, 855 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:28,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:28,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:28,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:29,187 INFO L124 PetriNetUnfolderBase]: 1991/2966 cut-off events. [2024-06-14 12:56:29,196 INFO L125 PetriNetUnfolderBase]: For 24483/24487 co-relation queries the response was YES. [2024-06-14 12:56:29,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14892 conditions, 2966 events. 1991/2966 cut-off events. For 24483/24487 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 13747 event pairs, 585 based on Foata normal form. 9/2974 useless extension candidates. Maximal degree in co-relation 14852. Up to 2711 conditions per place. [2024-06-14 12:56:29,212 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 106 selfloop transitions, 39 changer transitions 0/148 dead transitions. [2024-06-14 12:56:29,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 148 transitions, 1335 flow [2024-06-14 12:56:29,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:29,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:29,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:56:29,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:56:29,214 INFO L175 Difference]: Start difference. First operand has 86 places, 104 transitions, 855 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:56:29,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 148 transitions, 1335 flow [2024-06-14 12:56:29,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 148 transitions, 1288 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:29,229 INFO L231 Difference]: Finished difference. Result has 89 places, 110 transitions, 966 flow [2024-06-14 12:56:29,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=808, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=966, PETRI_PLACES=89, PETRI_TRANSITIONS=110} [2024-06-14 12:56:29,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 12:56:29,230 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 110 transitions, 966 flow [2024-06-14 12:56:29,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:29,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:29,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:29,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:56:29,231 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)] === [2024-06-14 12:56:29,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:29,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1547965536, now seen corresponding path program 1 times [2024-06-14 12:56:29,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:29,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041829171] [2024-06-14 12:56:29,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:29,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:29,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:29,915 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:29,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:29,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041829171] [2024-06-14 12:56:29,915 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041829171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:29,915 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:29,915 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:29,915 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768773298] [2024-06-14 12:56:29,915 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:29,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:29,916 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:29,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:29,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:29,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:29,968 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 110 transitions, 966 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:29,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:29,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:29,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:30,443 INFO L124 PetriNetUnfolderBase]: 2077/3091 cut-off events. [2024-06-14 12:56:30,443 INFO L125 PetriNetUnfolderBase]: For 28818/28820 co-relation queries the response was YES. [2024-06-14 12:56:30,452 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16404 conditions, 3091 events. 2077/3091 cut-off events. For 28818/28820 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14412 event pairs, 547 based on Foata normal form. 4/3094 useless extension candidates. Maximal degree in co-relation 16363. Up to 2636 conditions per place. [2024-06-14 12:56:30,461 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 104 selfloop transitions, 45 changer transitions 0/152 dead transitions. [2024-06-14 12:56:30,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 152 transitions, 1567 flow [2024-06-14 12:56:30,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:30,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:30,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:56:30,463 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44947735191637633 [2024-06-14 12:56:30,463 INFO L175 Difference]: Start difference. First operand has 89 places, 110 transitions, 966 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:56:30,463 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 152 transitions, 1567 flow [2024-06-14 12:56:30,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 152 transitions, 1452 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:30,496 INFO L231 Difference]: Finished difference. Result has 92 places, 119 transitions, 1088 flow [2024-06-14 12:56:30,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1088, PETRI_PLACES=92, PETRI_TRANSITIONS=119} [2024-06-14 12:56:30,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 50 predicate places. [2024-06-14 12:56:30,497 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 119 transitions, 1088 flow [2024-06-14 12:56:30,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:30,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:30,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:30,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:56:30,498 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)] === [2024-06-14 12:56:30,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:30,498 INFO L85 PathProgramCache]: Analyzing trace with hash -1547971116, now seen corresponding path program 2 times [2024-06-14 12:56:30,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:30,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339956224] [2024-06-14 12:56:30,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:30,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:30,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:31,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:31,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:31,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339956224] [2024-06-14 12:56:31,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339956224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:31,294 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:31,294 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:31,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989025349] [2024-06-14 12:56:31,294 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:31,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:31,295 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:31,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:31,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:31,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:31,350 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 119 transitions, 1088 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:31,350 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:31,350 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:31,350 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:31,846 INFO L124 PetriNetUnfolderBase]: 2057/3063 cut-off events. [2024-06-14 12:56:31,847 INFO L125 PetriNetUnfolderBase]: For 32490/32492 co-relation queries the response was YES. [2024-06-14 12:56:31,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16970 conditions, 3063 events. 2057/3063 cut-off events. For 32490/32492 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14257 event pairs, 548 based on Foata normal form. 8/3070 useless extension candidates. Maximal degree in co-relation 16926. Up to 2624 conditions per place. [2024-06-14 12:56:31,865 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 105 selfloop transitions, 48 changer transitions 0/156 dead transitions. [2024-06-14 12:56:31,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 156 transitions, 1648 flow [2024-06-14 12:56:31,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:31,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:31,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:56:31,866 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-14 12:56:31,866 INFO L175 Difference]: Start difference. First operand has 92 places, 119 transitions, 1088 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:56:31,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 156 transitions, 1648 flow [2024-06-14 12:56:31,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 156 transitions, 1569 flow, removed 18 selfloop flow, removed 3 redundant places. [2024-06-14 12:56:31,894 INFO L231 Difference]: Finished difference. Result has 97 places, 121 transitions, 1170 flow [2024-06-14 12:56:31,894 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1010, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1170, PETRI_PLACES=97, PETRI_TRANSITIONS=121} [2024-06-14 12:56:31,895 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 55 predicate places. [2024-06-14 12:56:31,895 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 121 transitions, 1170 flow [2024-06-14 12:56:31,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:31,895 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:31,895 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:31,895 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:56:31,896 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)] === [2024-06-14 12:56:31,896 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:31,896 INFO L85 PathProgramCache]: Analyzing trace with hash -429995479, now seen corresponding path program 1 times [2024-06-14 12:56:31,896 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:31,896 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351416137] [2024-06-14 12:56:31,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:31,896 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:31,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:32,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:32,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:32,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351416137] [2024-06-14 12:56:32,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1351416137] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:32,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:32,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:32,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104663934] [2024-06-14 12:56:32,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:32,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:32,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:32,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:32,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:32,835 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:32,835 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 121 transitions, 1170 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 12:56:32,835 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:32,835 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:32,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:33,402 INFO L124 PetriNetUnfolderBase]: 2052/3054 cut-off events. [2024-06-14 12:56:33,403 INFO L125 PetriNetUnfolderBase]: For 34971/34971 co-relation queries the response was YES. [2024-06-14 12:56:33,410 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17286 conditions, 3054 events. 2052/3054 cut-off events. For 34971/34971 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14135 event pairs, 589 based on Foata normal form. 2/3055 useless extension candidates. Maximal degree in co-relation 17240. Up to 2987 conditions per place. [2024-06-14 12:56:33,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 120 selfloop transitions, 19 changer transitions 0/142 dead transitions. [2024-06-14 12:56:33,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 142 transitions, 1521 flow [2024-06-14 12:56:33,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:33,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:33,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:56:33,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:56:33,419 INFO L175 Difference]: Start difference. First operand has 97 places, 121 transitions, 1170 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:56:33,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 142 transitions, 1521 flow [2024-06-14 12:56:33,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 142 transitions, 1432 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 12:56:33,449 INFO L231 Difference]: Finished difference. Result has 100 places, 122 transitions, 1154 flow [2024-06-14 12:56:33,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1088, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=102, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1154, PETRI_PLACES=100, PETRI_TRANSITIONS=122} [2024-06-14 12:56:33,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-14 12:56:33,449 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 122 transitions, 1154 flow [2024-06-14 12:56:33,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 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) [2024-06-14 12:56:33,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:33,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:33,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:56:33,450 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)] === [2024-06-14 12:56:33,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:33,450 INFO L85 PathProgramCache]: Analyzing trace with hash 313281218, now seen corresponding path program 3 times [2024-06-14 12:56:33,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:33,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126264627] [2024-06-14 12:56:33,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:33,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:34,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:34,110 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:34,110 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126264627] [2024-06-14 12:56:34,110 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126264627] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:34,110 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:34,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:34,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340172130] [2024-06-14 12:56:34,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:34,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:34,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:34,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:34,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:34,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:34,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 122 transitions, 1154 flow. Second operand has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:34,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:34,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:34,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:34,705 INFO L124 PetriNetUnfolderBase]: 2058/3065 cut-off events. [2024-06-14 12:56:34,706 INFO L125 PetriNetUnfolderBase]: For 38254/38258 co-relation queries the response was YES. [2024-06-14 12:56:34,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17315 conditions, 3065 events. 2058/3065 cut-off events. For 38254/38258 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 14256 event pairs, 597 based on Foata normal form. 8/3072 useless extension candidates. Maximal degree in co-relation 17268. Up to 2982 conditions per place. [2024-06-14 12:56:34,724 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 19 changer transitions 0/146 dead transitions. [2024-06-14 12:56:34,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 146 transitions, 1534 flow [2024-06-14 12:56:34,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:34,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:34,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:56:34,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:56:34,727 INFO L175 Difference]: Start difference. First operand has 100 places, 122 transitions, 1154 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:56:34,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 146 transitions, 1534 flow [2024-06-14 12:56:34,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 146 transitions, 1502 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:34,759 INFO L231 Difference]: Finished difference. Result has 102 places, 125 transitions, 1212 flow [2024-06-14 12:56:34,759 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1122, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1212, PETRI_PLACES=102, PETRI_TRANSITIONS=125} [2024-06-14 12:56:34,759 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 60 predicate places. [2024-06-14 12:56:34,760 INFO L495 AbstractCegarLoop]: Abstraction has has 102 places, 125 transitions, 1212 flow [2024-06-14 12:56:34,760 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.625) internal successors, (69), 8 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) [2024-06-14 12:56:34,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:34,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:34,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:56:34,760 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)] === [2024-06-14 12:56:34,760 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:34,761 INFO L85 PathProgramCache]: Analyzing trace with hash -860616385, now seen corresponding path program 1 times [2024-06-14 12:56:34,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:34,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962578538] [2024-06-14 12:56:34,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:34,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:34,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:35,752 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:35,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:35,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962578538] [2024-06-14 12:56:35,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962578538] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:35,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:35,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:35,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694541934] [2024-06-14 12:56:35,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:35,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:35,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:35,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:35,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:35,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:35,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 125 transitions, 1212 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:35,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:35,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:35,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:36,504 INFO L124 PetriNetUnfolderBase]: 2186/3273 cut-off events. [2024-06-14 12:56:36,504 INFO L125 PetriNetUnfolderBase]: For 46443/46445 co-relation queries the response was YES. [2024-06-14 12:56:36,514 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18891 conditions, 3273 events. 2186/3273 cut-off events. For 46443/46445 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15569 event pairs, 435 based on Foata normal form. 4/3276 useless extension candidates. Maximal degree in co-relation 18843. Up to 2583 conditions per place. [2024-06-14 12:56:36,525 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 125 selfloop transitions, 56 changer transitions 0/184 dead transitions. [2024-06-14 12:56:36,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 184 transitions, 2094 flow [2024-06-14 12:56:36,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:36,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:36,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:56:36,527 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 12:56:36,527 INFO L175 Difference]: Start difference. First operand has 102 places, 125 transitions, 1212 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:56:36,527 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 184 transitions, 2094 flow [2024-06-14 12:56:36,561 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 184 transitions, 2040 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:36,564 INFO L231 Difference]: Finished difference. Result has 107 places, 141 transitions, 1526 flow [2024-06-14 12:56:36,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1158, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1526, PETRI_PLACES=107, PETRI_TRANSITIONS=141} [2024-06-14 12:56:36,564 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 12:56:36,564 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 141 transitions, 1526 flow [2024-06-14 12:56:36,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:36,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:36,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:36,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:56:36,565 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:36,565 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:36,565 INFO L85 PathProgramCache]: Analyzing trace with hash -860555935, now seen corresponding path program 2 times [2024-06-14 12:56:36,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:36,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340256425] [2024-06-14 12:56:36,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:36,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:36,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:37,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:37,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:37,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340256425] [2024-06-14 12:56:37,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340256425] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:37,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:37,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:37,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1367062241] [2024-06-14 12:56:37,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:37,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:37,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:37,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:37,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:37,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:37,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 141 transitions, 1526 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:37,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:37,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:37,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:38,209 INFO L124 PetriNetUnfolderBase]: 2214/3316 cut-off events. [2024-06-14 12:56:38,210 INFO L125 PetriNetUnfolderBase]: For 53700/53702 co-relation queries the response was YES. [2024-06-14 12:56:38,221 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20214 conditions, 3316 events. 2214/3316 cut-off events. For 53700/53702 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 15880 event pairs, 551 based on Foata normal form. 4/3319 useless extension candidates. Maximal degree in co-relation 20163. Up to 2892 conditions per place. [2024-06-14 12:56:38,232 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 124 selfloop transitions, 55 changer transitions 0/182 dead transitions. [2024-06-14 12:56:38,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 182 transitions, 2204 flow [2024-06-14 12:56:38,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:38,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:38,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:56:38,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:56:38,237 INFO L175 Difference]: Start difference. First operand has 107 places, 141 transitions, 1526 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:56:38,237 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 182 transitions, 2204 flow [2024-06-14 12:56:38,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 182 transitions, 2148 flow, removed 22 selfloop flow, removed 2 redundant places. [2024-06-14 12:56:38,289 INFO L231 Difference]: Finished difference. Result has 113 places, 146 transitions, 1667 flow [2024-06-14 12:56:38,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1478, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1667, PETRI_PLACES=113, PETRI_TRANSITIONS=146} [2024-06-14 12:56:38,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 12:56:38,293 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 146 transitions, 1667 flow [2024-06-14 12:56:38,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:38,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:38,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:38,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:56:38,293 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)] === [2024-06-14 12:56:38,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:38,294 INFO L85 PathProgramCache]: Analyzing trace with hash 1608228951, now seen corresponding path program 1 times [2024-06-14 12:56:38,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:38,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413915655] [2024-06-14 12:56:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:38,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:38,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:39,236 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:39,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:39,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413915655] [2024-06-14 12:56:39,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413915655] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:39,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:39,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:39,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926066506] [2024-06-14 12:56:39,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:39,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:39,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:39,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:39,238 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:39,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:39,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 146 transitions, 1667 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:39,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:39,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:39,291 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:39,824 INFO L124 PetriNetUnfolderBase]: 2204/3302 cut-off events. [2024-06-14 12:56:39,825 INFO L125 PetriNetUnfolderBase]: For 57681/57683 co-relation queries the response was YES. [2024-06-14 12:56:39,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20426 conditions, 3302 events. 2204/3302 cut-off events. For 57681/57683 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15797 event pairs, 553 based on Foata normal form. 4/3305 useless extension candidates. Maximal degree in co-relation 20373. Up to 3000 conditions per place. [2024-06-14 12:56:39,847 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 45 changer transitions 0/177 dead transitions. [2024-06-14 12:56:39,847 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 177 transitions, 2177 flow [2024-06-14 12:56:39,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:39,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:39,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 12:56:39,870 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:56:39,870 INFO L175 Difference]: Start difference. First operand has 113 places, 146 transitions, 1667 flow. Second operand 8 states and 140 transitions. [2024-06-14 12:56:39,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 177 transitions, 2177 flow [2024-06-14 12:56:39,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 177 transitions, 2032 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:39,926 INFO L231 Difference]: Finished difference. Result has 116 places, 146 transitions, 1620 flow [2024-06-14 12:56:39,926 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1522, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1620, PETRI_PLACES=116, PETRI_TRANSITIONS=146} [2024-06-14 12:56:39,926 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 74 predicate places. [2024-06-14 12:56:39,927 INFO L495 AbstractCegarLoop]: Abstraction has has 116 places, 146 transitions, 1620 flow [2024-06-14 12:56:39,927 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:39,927 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:39,927 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:39,927 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:56:39,927 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)] === [2024-06-14 12:56:39,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:39,928 INFO L85 PathProgramCache]: Analyzing trace with hash 1608224177, now seen corresponding path program 3 times [2024-06-14 12:56:39,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:39,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528793174] [2024-06-14 12:56:39,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:39,928 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:39,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:40,883 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:40,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:40,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528793174] [2024-06-14 12:56:40,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528793174] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:40,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:40,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:40,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478102372] [2024-06-14 12:56:40,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:40,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:40,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:40,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:40,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:40,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:40,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 146 transitions, 1620 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:40,993 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:40,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:40,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:41,714 INFO L124 PetriNetUnfolderBase]: 2388/3574 cut-off events. [2024-06-14 12:56:41,714 INFO L125 PetriNetUnfolderBase]: For 68984/68988 co-relation queries the response was YES. [2024-06-14 12:56:41,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22135 conditions, 3574 events. 2388/3574 cut-off events. For 68984/68988 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17294 event pairs, 592 based on Foata normal form. 33/3606 useless extension candidates. Maximal degree in co-relation 22081. Up to 3108 conditions per place. [2024-06-14 12:56:41,736 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 156 selfloop transitions, 53 changer transitions 0/212 dead transitions. [2024-06-14 12:56:41,736 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 212 transitions, 2518 flow [2024-06-14 12:56:41,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:41,736 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:41,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2024-06-14 12:56:41,737 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4634146341463415 [2024-06-14 12:56:41,737 INFO L175 Difference]: Start difference. First operand has 116 places, 146 transitions, 1620 flow. Second operand 8 states and 152 transitions. [2024-06-14 12:56:41,737 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 212 transitions, 2518 flow [2024-06-14 12:56:41,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 212 transitions, 2400 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:41,803 INFO L231 Difference]: Finished difference. Result has 123 places, 171 transitions, 2002 flow [2024-06-14 12:56:41,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2002, PETRI_PLACES=123, PETRI_TRANSITIONS=171} [2024-06-14 12:56:41,804 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 12:56:41,804 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 171 transitions, 2002 flow [2024-06-14 12:56:41,804 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:41,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:41,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:41,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:56:41,805 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)] === [2024-06-14 12:56:41,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:41,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1735169193, now seen corresponding path program 2 times [2024-06-14 12:56:41,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:41,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110736541] [2024-06-14 12:56:41,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:41,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:41,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:42,738 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:42,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:42,739 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110736541] [2024-06-14 12:56:42,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110736541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:42,739 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:42,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:42,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129179399] [2024-06-14 12:56:42,739 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:42,740 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:42,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:42,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:42,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:42,778 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:42,779 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 171 transitions, 2002 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:42,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:42,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:42,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:43,542 INFO L124 PetriNetUnfolderBase]: 2410/3607 cut-off events. [2024-06-14 12:56:43,542 INFO L125 PetriNetUnfolderBase]: For 81572/81574 co-relation queries the response was YES. [2024-06-14 12:56:43,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24768 conditions, 3607 events. 2410/3607 cut-off events. For 81572/81574 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17468 event pairs, 572 based on Foata normal form. 4/3610 useless extension candidates. Maximal degree in co-relation 24709. Up to 3153 conditions per place. [2024-06-14 12:56:43,573 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 143 selfloop transitions, 63 changer transitions 0/209 dead transitions. [2024-06-14 12:56:43,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 209 transitions, 2647 flow [2024-06-14 12:56:43,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:43,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:43,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:56:43,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:56:43,574 INFO L175 Difference]: Start difference. First operand has 123 places, 171 transitions, 2002 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:56:43,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 209 transitions, 2647 flow [2024-06-14 12:56:43,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 209 transitions, 2557 flow, removed 44 selfloop flow, removed 1 redundant places. [2024-06-14 12:56:43,675 INFO L231 Difference]: Finished difference. Result has 130 places, 174 transitions, 2093 flow [2024-06-14 12:56:43,676 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1912, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=171, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2093, PETRI_PLACES=130, PETRI_TRANSITIONS=174} [2024-06-14 12:56:43,676 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 88 predicate places. [2024-06-14 12:56:43,676 INFO L495 AbstractCegarLoop]: Abstraction has has 130 places, 174 transitions, 2093 flow [2024-06-14 12:56:43,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:43,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:43,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:43,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:56:43,677 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)] === [2024-06-14 12:56:43,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:43,677 INFO L85 PathProgramCache]: Analyzing trace with hash 1723693101, now seen corresponding path program 3 times [2024-06-14 12:56:43,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:43,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102742457] [2024-06-14 12:56:43,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:43,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:43,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:44,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:44,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:44,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102742457] [2024-06-14 12:56:44,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102742457] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:44,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:44,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:56:44,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129666200] [2024-06-14 12:56:44,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:44,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:56:44,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:44,472 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:56:44,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:56:44,524 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:44,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 130 places, 174 transitions, 2093 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:44,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:44,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:44,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:45,133 INFO L124 PetriNetUnfolderBase]: 2403/3598 cut-off events. [2024-06-14 12:56:45,134 INFO L125 PetriNetUnfolderBase]: For 84672/84674 co-relation queries the response was YES. [2024-06-14 12:56:45,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24781 conditions, 3598 events. 2403/3598 cut-off events. For 84672/84674 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17424 event pairs, 582 based on Foata normal form. 4/3601 useless extension candidates. Maximal degree in co-relation 24719. Up to 3232 conditions per place. [2024-06-14 12:56:45,162 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 149 selfloop transitions, 55 changer transitions 0/207 dead transitions. [2024-06-14 12:56:45,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 207 transitions, 2685 flow [2024-06-14 12:56:45,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:45,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:45,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 134 transitions. [2024-06-14 12:56:45,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46689895470383275 [2024-06-14 12:56:45,163 INFO L175 Difference]: Start difference. First operand has 130 places, 174 transitions, 2093 flow. Second operand 7 states and 134 transitions. [2024-06-14 12:56:45,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 207 transitions, 2685 flow [2024-06-14 12:56:45,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 207 transitions, 2527 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:45,266 INFO L231 Difference]: Finished difference. Result has 131 places, 174 transitions, 2064 flow [2024-06-14 12:56:45,266 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1935, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=119, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2064, PETRI_PLACES=131, PETRI_TRANSITIONS=174} [2024-06-14 12:56:45,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 12:56:45,267 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 174 transitions, 2064 flow [2024-06-14 12:56:45,267 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:45,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:45,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:45,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:56:45,267 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)] === [2024-06-14 12:56:45,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:45,268 INFO L85 PathProgramCache]: Analyzing trace with hash 1723700045, now seen corresponding path program 1 times [2024-06-14 12:56:45,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:45,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350412602] [2024-06-14 12:56:45,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:45,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:45,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:46,381 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:46,381 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:46,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350412602] [2024-06-14 12:56:46,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350412602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:46,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:46,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:46,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765116154] [2024-06-14 12:56:46,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:46,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:46,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:46,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:46,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:46,446 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 174 transitions, 2064 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:46,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:46,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:46,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:47,228 INFO L124 PetriNetUnfolderBase]: 2512/3777 cut-off events. [2024-06-14 12:56:47,228 INFO L125 PetriNetUnfolderBase]: For 98546/98548 co-relation queries the response was YES. [2024-06-14 12:56:47,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25803 conditions, 3777 events. 2512/3777 cut-off events. For 98546/98548 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18656 event pairs, 571 based on Foata normal form. 28/3804 useless extension candidates. Maximal degree in co-relation 25740. Up to 3173 conditions per place. [2024-06-14 12:56:47,255 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 147 selfloop transitions, 63 changer transitions 0/213 dead transitions. [2024-06-14 12:56:47,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 213 transitions, 2742 flow [2024-06-14 12:56:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:47,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:47,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:56:47,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 12:56:47,257 INFO L175 Difference]: Start difference. First operand has 131 places, 174 transitions, 2064 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:56:47,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 213 transitions, 2742 flow [2024-06-14 12:56:47,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 213 transitions, 2647 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:47,345 INFO L231 Difference]: Finished difference. Result has 134 places, 177 transitions, 2167 flow [2024-06-14 12:56:47,345 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1973, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2167, PETRI_PLACES=134, PETRI_TRANSITIONS=177} [2024-06-14 12:56:47,345 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 12:56:47,346 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 177 transitions, 2167 flow [2024-06-14 12:56:47,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:47,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:47,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:47,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:56:47,346 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)] === [2024-06-14 12:56:47,346 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:47,347 INFO L85 PathProgramCache]: Analyzing trace with hash -681132245, now seen corresponding path program 2 times [2024-06-14 12:56:47,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:47,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55733752] [2024-06-14 12:56:47,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:47,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:47,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:48,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:48,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:48,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55733752] [2024-06-14 12:56:48,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55733752] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:48,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:48,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:48,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648813673] [2024-06-14 12:56:48,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:48,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:48,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:48,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:48,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:48,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:48,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 177 transitions, 2167 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:48,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:48,302 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:48,302 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:48,991 INFO L124 PetriNetUnfolderBase]: 2529/3802 cut-off events. [2024-06-14 12:56:48,991 INFO L125 PetriNetUnfolderBase]: For 92291/92291 co-relation queries the response was YES. [2024-06-14 12:56:49,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26406 conditions, 3802 events. 2529/3802 cut-off events. For 92291/92291 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18753 event pairs, 649 based on Foata normal form. 4/3805 useless extension candidates. Maximal degree in co-relation 26343. Up to 3690 conditions per place. [2024-06-14 12:56:49,023 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 26 changer transitions 0/205 dead transitions. [2024-06-14 12:56:49,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 205 transitions, 2677 flow [2024-06-14 12:56:49,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:49,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:49,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:56:49,025 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 12:56:49,025 INFO L175 Difference]: Start difference. First operand has 134 places, 177 transitions, 2167 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:56:49,025 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 205 transitions, 2677 flow [2024-06-14 12:56:49,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 205 transitions, 2517 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:49,124 INFO L231 Difference]: Finished difference. Result has 136 places, 179 transitions, 2108 flow [2024-06-14 12:56:49,124 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2007, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2108, PETRI_PLACES=136, PETRI_TRANSITIONS=179} [2024-06-14 12:56:49,125 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 94 predicate places. [2024-06-14 12:56:49,125 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 179 transitions, 2108 flow [2024-06-14 12:56:49,125 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:49,125 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:49,125 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:49,125 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:56:49,125 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)] === [2024-06-14 12:56:49,126 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:49,126 INFO L85 PathProgramCache]: Analyzing trace with hash 1294250265, now seen corresponding path program 3 times [2024-06-14 12:56:49,126 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:49,126 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940337564] [2024-06-14 12:56:49,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:49,126 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:49,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:50,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:50,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:50,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940337564] [2024-06-14 12:56:50,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940337564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:50,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:50,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:50,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [408724879] [2024-06-14 12:56:50,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:50,151 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:50,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:50,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:50,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:50,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:50,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 179 transitions, 2108 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:50,221 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:50,221 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:50,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:50,962 INFO L124 PetriNetUnfolderBase]: 2546/3829 cut-off events. [2024-06-14 12:56:50,963 INFO L125 PetriNetUnfolderBase]: For 97996/97996 co-relation queries the response was YES. [2024-06-14 12:56:50,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26474 conditions, 3829 events. 2546/3829 cut-off events. For 97996/97996 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18900 event pairs, 654 based on Foata normal form. 4/3832 useless extension candidates. Maximal degree in co-relation 26410. Up to 3753 conditions per place. [2024-06-14 12:56:50,998 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 184 selfloop transitions, 19 changer transitions 0/206 dead transitions. [2024-06-14 12:56:50,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 206 transitions, 2620 flow [2024-06-14 12:56:50,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:50,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:50,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:56:50,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:56:50,999 INFO L175 Difference]: Start difference. First operand has 136 places, 179 transitions, 2108 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:56:51,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 206 transitions, 2620 flow [2024-06-14 12:56:51,116 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 206 transitions, 2537 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:51,119 INFO L231 Difference]: Finished difference. Result has 138 places, 181 transitions, 2116 flow [2024-06-14 12:56:51,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2025, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2116, PETRI_PLACES=138, PETRI_TRANSITIONS=181} [2024-06-14 12:56:51,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 12:56:51,119 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 181 transitions, 2116 flow [2024-06-14 12:56:51,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:51,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:51,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:51,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:56:51,120 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)] === [2024-06-14 12:56:51,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:51,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1294489275, now seen corresponding path program 4 times [2024-06-14 12:56:51,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:51,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465511999] [2024-06-14 12:56:51,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:51,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:51,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:51,989 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:51,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:51,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465511999] [2024-06-14 12:56:51,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465511999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:51,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:51,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:51,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043923806] [2024-06-14 12:56:51,990 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:51,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:51,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:51,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:51,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:52,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:52,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 181 transitions, 2116 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:52,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:52,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:52,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:52,946 INFO L124 PetriNetUnfolderBase]: 2563/3856 cut-off events. [2024-06-14 12:56:52,947 INFO L125 PetriNetUnfolderBase]: For 104622/104622 co-relation queries the response was YES. [2024-06-14 12:56:52,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26927 conditions, 3856 events. 2563/3856 cut-off events. For 104622/104622 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19106 event pairs, 639 based on Foata normal form. 4/3859 useless extension candidates. Maximal degree in co-relation 26862. Up to 3775 conditions per place. [2024-06-14 12:56:52,974 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 188 selfloop transitions, 17 changer transitions 0/208 dead transitions. [2024-06-14 12:56:52,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 208 transitions, 2634 flow [2024-06-14 12:56:52,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:52,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:52,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 12:56:52,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 12:56:52,976 INFO L175 Difference]: Start difference. First operand has 138 places, 181 transitions, 2116 flow. Second operand 8 states and 125 transitions. [2024-06-14 12:56:52,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 208 transitions, 2634 flow [2024-06-14 12:56:53,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 208 transitions, 2561 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:53,064 INFO L231 Difference]: Finished difference. Result has 140 places, 183 transitions, 2134 flow [2024-06-14 12:56:53,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2043, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=181, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2134, PETRI_PLACES=140, PETRI_TRANSITIONS=183} [2024-06-14 12:56:53,069 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 98 predicate places. [2024-06-14 12:56:53,069 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 183 transitions, 2134 flow [2024-06-14 12:56:53,069 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:53,069 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:53,070 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:53,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:56:53,070 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:53,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:53,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1302524475, now seen corresponding path program 5 times [2024-06-14 12:56:53,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:53,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092851734] [2024-06-14 12:56:53,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:53,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:53,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:53,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:53,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:53,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092851734] [2024-06-14 12:56:53,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092851734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:53,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:53,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:56:53,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595567214] [2024-06-14 12:56:53,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:53,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:56:53,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:53,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:56:53,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:56:54,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:54,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 183 transitions, 2134 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:54,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:54,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:54,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:54,778 INFO L124 PetriNetUnfolderBase]: 2555/3844 cut-off events. [2024-06-14 12:56:54,778 INFO L125 PetriNetUnfolderBase]: For 109787/109787 co-relation queries the response was YES. [2024-06-14 12:56:54,799 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26983 conditions, 3844 events. 2555/3844 cut-off events. For 109787/109787 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19035 event pairs, 652 based on Foata normal form. 4/3847 useless extension candidates. Maximal degree in co-relation 26917. Up to 3741 conditions per place. [2024-06-14 12:56:54,815 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 184 selfloop transitions, 23 changer transitions 0/210 dead transitions. [2024-06-14 12:56:54,815 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 210 transitions, 2662 flow [2024-06-14 12:56:54,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:56:54,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:56:54,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:56:54,816 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:56:54,816 INFO L175 Difference]: Start difference. First operand has 140 places, 183 transitions, 2134 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:56:54,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 210 transitions, 2662 flow [2024-06-14 12:56:54,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 210 transitions, 2589 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 12:56:54,928 INFO L231 Difference]: Finished difference. Result has 142 places, 185 transitions, 2171 flow [2024-06-14 12:56:54,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2061, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2171, PETRI_PLACES=142, PETRI_TRANSITIONS=185} [2024-06-14 12:56:54,929 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-14 12:56:54,930 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 185 transitions, 2171 flow [2024-06-14 12:56:54,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:54,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:54,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:54,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:56:54,930 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)] === [2024-06-14 12:56:54,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:54,931 INFO L85 PathProgramCache]: Analyzing trace with hash 1302524227, now seen corresponding path program 1 times [2024-06-14 12:56:54,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:54,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819064846] [2024-06-14 12:56:54,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:54,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:54,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:55,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:55,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819064846] [2024-06-14 12:56:55,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819064846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:55,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:55,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:55,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809451403] [2024-06-14 12:56:55,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:55,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:55,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:55,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:55,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:55,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:55,861 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 185 transitions, 2171 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:55,861 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:55,861 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:55,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:56,520 INFO L124 PetriNetUnfolderBase]: 2547/3833 cut-off events. [2024-06-14 12:56:56,520 INFO L125 PetriNetUnfolderBase]: For 114796/114800 co-relation queries the response was YES. [2024-06-14 12:56:56,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27114 conditions, 3833 events. 2547/3833 cut-off events. For 114796/114800 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 18935 event pairs, 656 based on Foata normal form. 6/3838 useless extension candidates. Maximal degree in co-relation 27047. Up to 3733 conditions per place. [2024-06-14 12:56:56,552 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 180 selfloop transitions, 24 changer transitions 0/207 dead transitions. [2024-06-14 12:56:56,552 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 207 transitions, 2656 flow [2024-06-14 12:56:56,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:56:56,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:56:56,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:56:56,553 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:56:56,553 INFO L175 Difference]: Start difference. First operand has 142 places, 185 transitions, 2171 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:56:56,553 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 207 transitions, 2656 flow [2024-06-14 12:56:56,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 207 transitions, 2548 flow, removed 36 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:56,686 INFO L231 Difference]: Finished difference. Result has 144 places, 186 transitions, 2146 flow [2024-06-14 12:56:56,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2146, PETRI_PLACES=144, PETRI_TRANSITIONS=186} [2024-06-14 12:56:56,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 12:56:56,687 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 186 transitions, 2146 flow [2024-06-14 12:56:56,687 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:56,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:56,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:56,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:56:56,691 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:56:56,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:56,704 INFO L85 PathProgramCache]: Analyzing trace with hash -651811801, now seen corresponding path program 1 times [2024-06-14 12:56:56,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:56,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420039309] [2024-06-14 12:56:56,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:56,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:56,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:57,425 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:57,425 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:57,425 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420039309] [2024-06-14 12:56:57,425 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420039309] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:57,425 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:57,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:56:57,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970356966] [2024-06-14 12:56:57,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:57,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:56:57,426 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:57,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:56:57,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:56:57,468 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:57,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 186 transitions, 2146 flow. Second operand has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:57,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:57,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:57,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:56:58,155 INFO L124 PetriNetUnfolderBase]: 2526/3802 cut-off events. [2024-06-14 12:56:58,156 INFO L125 PetriNetUnfolderBase]: For 110281/110281 co-relation queries the response was YES. [2024-06-14 12:56:58,170 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26513 conditions, 3802 events. 2526/3802 cut-off events. For 110281/110281 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18754 event pairs, 629 based on Foata normal form. 4/3805 useless extension candidates. Maximal degree in co-relation 26445. Up to 3742 conditions per place. [2024-06-14 12:56:58,181 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 188 selfloop transitions, 18 changer transitions 0/209 dead transitions. [2024-06-14 12:56:58,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 209 transitions, 2714 flow [2024-06-14 12:56:58,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:56:58,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:56:58,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 12:56:58,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 12:56:58,183 INFO L175 Difference]: Start difference. First operand has 144 places, 186 transitions, 2146 flow. Second operand 5 states and 90 transitions. [2024-06-14 12:56:58,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 209 transitions, 2714 flow [2024-06-14 12:56:58,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 209 transitions, 2668 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:56:58,281 INFO L231 Difference]: Finished difference. Result has 144 places, 191 transitions, 2248 flow [2024-06-14 12:56:58,282 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2100, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=186, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2248, PETRI_PLACES=144, PETRI_TRANSITIONS=191} [2024-06-14 12:56:58,282 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 12:56:58,282 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 191 transitions, 2248 flow [2024-06-14 12:56:58,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.0) internal successors, (63), 7 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:56:58,282 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:56:58,282 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:56:58,283 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:56:58,283 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)] === [2024-06-14 12:56:58,283 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:56:58,283 INFO L85 PathProgramCache]: Analyzing trace with hash -909303145, now seen corresponding path program 1 times [2024-06-14 12:56:58,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:56:58,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263552964] [2024-06-14 12:56:58,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:56:58,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:56:58,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:56:59,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:56:59,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:56:59,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263552964] [2024-06-14 12:56:59,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263552964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:56:59,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:56:59,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:56:59,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1152930471] [2024-06-14 12:56:59,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:56:59,067 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:56:59,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:56:59,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:56:59,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:56:59,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:56:59,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 191 transitions, 2248 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:56:59,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:56:59,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:56:59,153 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:00,016 INFO L124 PetriNetUnfolderBase]: 2670/4044 cut-off events. [2024-06-14 12:57:00,017 INFO L125 PetriNetUnfolderBase]: For 131984/131986 co-relation queries the response was YES. [2024-06-14 12:57:00,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28681 conditions, 4044 events. 2670/4044 cut-off events. For 131984/131986 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 20434 event pairs, 459 based on Foata normal form. 16/4059 useless extension candidates. Maximal degree in co-relation 28612. Up to 2696 conditions per place. [2024-06-14 12:57:00,052 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 165 selfloop transitions, 65 changer transitions 0/233 dead transitions. [2024-06-14 12:57:00,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 233 transitions, 3012 flow [2024-06-14 12:57:00,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:00,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:00,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 12:57:00,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 12:57:00,054 INFO L175 Difference]: Start difference. First operand has 144 places, 191 transitions, 2248 flow. Second operand 8 states and 146 transitions. [2024-06-14 12:57:00,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 233 transitions, 3012 flow [2024-06-14 12:57:00,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 233 transitions, 2961 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:00,183 INFO L231 Difference]: Finished difference. Result has 149 places, 193 transitions, 2387 flow [2024-06-14 12:57:00,183 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2197, PETRI_DIFFERENCE_MINUEND_PLACES=141, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2387, PETRI_PLACES=149, PETRI_TRANSITIONS=193} [2024-06-14 12:57:00,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 107 predicate places. [2024-06-14 12:57:00,184 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 193 transitions, 2387 flow [2024-06-14 12:57:00,184 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:00,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:00,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:00,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:57:00,184 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:00,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:00,185 INFO L85 PathProgramCache]: Analyzing trace with hash -907429195, now seen corresponding path program 2 times [2024-06-14 12:57:00,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:00,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5242535] [2024-06-14 12:57:00,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:00,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:00,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:00,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:00,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:00,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5242535] [2024-06-14 12:57:00,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5242535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:00,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:00,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:00,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [883782985] [2024-06-14 12:57:00,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:00,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:00,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:00,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:00,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:01,021 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:01,021 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 193 transitions, 2387 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:01,021 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:01,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:01,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:01,795 INFO L124 PetriNetUnfolderBase]: 2900/4426 cut-off events. [2024-06-14 12:57:01,795 INFO L125 PetriNetUnfolderBase]: For 158003/158005 co-relation queries the response was YES. [2024-06-14 12:57:01,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31951 conditions, 4426 events. 2900/4426 cut-off events. For 158003/158005 co-relation queries the response was YES. Maximal size of possible extension queue 218. Compared 23219 event pairs, 680 based on Foata normal form. 16/4441 useless extension candidates. Maximal degree in co-relation 31881. Up to 3427 conditions per place. [2024-06-14 12:57:01,829 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 166 selfloop transitions, 66 changer transitions 0/235 dead transitions. [2024-06-14 12:57:01,829 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 235 transitions, 3166 flow [2024-06-14 12:57:01,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:01,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:01,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2024-06-14 12:57:01,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45426829268292684 [2024-06-14 12:57:01,832 INFO L175 Difference]: Start difference. First operand has 149 places, 193 transitions, 2387 flow. Second operand 8 states and 149 transitions. [2024-06-14 12:57:01,832 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 235 transitions, 3166 flow [2024-06-14 12:57:01,967 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 235 transitions, 3074 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:01,970 INFO L231 Difference]: Finished difference. Result has 154 places, 196 transitions, 2530 flow [2024-06-14 12:57:01,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=145, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=154, PETRI_TRANSITIONS=196} [2024-06-14 12:57:01,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-14 12:57:01,971 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 196 transitions, 2530 flow [2024-06-14 12:57:01,971 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:01,971 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:01,971 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:01,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:57:01,971 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:01,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:01,972 INFO L85 PathProgramCache]: Analyzing trace with hash -820589515, now seen corresponding path program 3 times [2024-06-14 12:57:01,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:01,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857008049] [2024-06-14 12:57:01,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:01,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:01,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:02,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:02,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:02,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857008049] [2024-06-14 12:57:02,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857008049] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:02,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:02,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:02,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1104306270] [2024-06-14 12:57:02,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:02,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:02,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:02,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:02,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:02,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:02,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 196 transitions, 2530 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:02,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:02,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:02,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:03,681 INFO L124 PetriNetUnfolderBase]: 2864/4370 cut-off events. [2024-06-14 12:57:03,681 INFO L125 PetriNetUnfolderBase]: For 158603/158605 co-relation queries the response was YES. [2024-06-14 12:57:03,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31604 conditions, 4370 events. 2864/4370 cut-off events. For 158603/158605 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 22857 event pairs, 703 based on Foata normal form. 20/4389 useless extension candidates. Maximal degree in co-relation 31531. Up to 3923 conditions per place. [2024-06-14 12:57:03,719 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 176 selfloop transitions, 51 changer transitions 0/230 dead transitions. [2024-06-14 12:57:03,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 230 transitions, 3086 flow [2024-06-14 12:57:03,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:03,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:03,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:57:03,721 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:57:03,721 INFO L175 Difference]: Start difference. First operand has 154 places, 196 transitions, 2530 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:57:03,721 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 230 transitions, 3086 flow [2024-06-14 12:57:03,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 230 transitions, 3003 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:03,917 INFO L231 Difference]: Finished difference. Result has 158 places, 196 transitions, 2559 flow [2024-06-14 12:57:03,917 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2447, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2559, PETRI_PLACES=158, PETRI_TRANSITIONS=196} [2024-06-14 12:57:03,917 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 12:57:03,918 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 196 transitions, 2559 flow [2024-06-14 12:57:03,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:03,918 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:03,918 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:03,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:57:03,918 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:03,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1541678411, now seen corresponding path program 4 times [2024-06-14 12:57:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031163861] [2024-06-14 12:57:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:04,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:04,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:04,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031163861] [2024-06-14 12:57:04,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031163861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:04,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:04,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:04,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153487738] [2024-06-14 12:57:04,913 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:04,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:04,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:04,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:04,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:04,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:04,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 196 transitions, 2559 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:04,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:04,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:04,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:05,872 INFO L124 PetriNetUnfolderBase]: 3008/4610 cut-off events. [2024-06-14 12:57:05,873 INFO L125 PetriNetUnfolderBase]: For 174064/174066 co-relation queries the response was YES. [2024-06-14 12:57:05,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33707 conditions, 4610 events. 3008/4610 cut-off events. For 174064/174066 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 24577 event pairs, 609 based on Foata normal form. 16/4625 useless extension candidates. Maximal degree in co-relation 33632. Up to 3690 conditions per place. [2024-06-14 12:57:05,928 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 182 selfloop transitions, 64 changer transitions 0/249 dead transitions. [2024-06-14 12:57:05,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 249 transitions, 3399 flow [2024-06-14 12:57:05,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:05,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:05,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 170 transitions. [2024-06-14 12:57:05,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46070460704607047 [2024-06-14 12:57:05,930 INFO L175 Difference]: Start difference. First operand has 158 places, 196 transitions, 2559 flow. Second operand 9 states and 170 transitions. [2024-06-14 12:57:05,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 249 transitions, 3399 flow [2024-06-14 12:57:06,153 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 249 transitions, 3266 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:06,156 INFO L231 Difference]: Finished difference. Result has 160 places, 198 transitions, 2614 flow [2024-06-14 12:57:06,156 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2426, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2614, PETRI_PLACES=160, PETRI_TRANSITIONS=198} [2024-06-14 12:57:06,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-14 12:57:06,157 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 198 transitions, 2614 flow [2024-06-14 12:57:06,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:06,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:06,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:06,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:57:06,158 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)] === [2024-06-14 12:57:06,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:06,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1889372939, now seen corresponding path program 5 times [2024-06-14 12:57:06,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:06,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774273081] [2024-06-14 12:57:06,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:06,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:06,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:07,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:07,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:07,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774273081] [2024-06-14 12:57:07,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774273081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:07,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:07,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:07,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052645912] [2024-06-14 12:57:07,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:07,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:07,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:07,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:07,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:07,059 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:07,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 198 transitions, 2614 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:07,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:07,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:07,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:07,974 INFO L124 PetriNetUnfolderBase]: 3050/4684 cut-off events. [2024-06-14 12:57:07,974 INFO L125 PetriNetUnfolderBase]: For 184502/184504 co-relation queries the response was YES. [2024-06-14 12:57:08,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34224 conditions, 4684 events. 3050/4684 cut-off events. For 184502/184504 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25220 event pairs, 739 based on Foata normal form. 24/4707 useless extension candidates. Maximal degree in co-relation 34148. Up to 4102 conditions per place. [2024-06-14 12:57:08,017 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 168 selfloop transitions, 66 changer transitions 0/237 dead transitions. [2024-06-14 12:57:08,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 237 transitions, 3240 flow [2024-06-14 12:57:08,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:08,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:57:08,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 12:57:08,018 INFO L175 Difference]: Start difference. First operand has 160 places, 198 transitions, 2614 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:57:08,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 237 transitions, 3240 flow [2024-06-14 12:57:08,205 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 237 transitions, 3138 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:08,208 INFO L231 Difference]: Finished difference. Result has 163 places, 200 transitions, 2705 flow [2024-06-14 12:57:08,208 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2514, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2705, PETRI_PLACES=163, PETRI_TRANSITIONS=200} [2024-06-14 12:57:08,208 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 12:57:08,208 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 200 transitions, 2705 flow [2024-06-14 12:57:08,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:08,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:08,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:08,209 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:57:08,209 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)] === [2024-06-14 12:57:08,209 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:08,209 INFO L85 PathProgramCache]: Analyzing trace with hash -1535960399, now seen corresponding path program 1 times [2024-06-14 12:57:08,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:08,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230315493] [2024-06-14 12:57:08,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:08,210 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:08,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:09,252 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:09,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:09,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230315493] [2024-06-14 12:57:09,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230315493] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:09,253 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:09,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:09,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341997650] [2024-06-14 12:57:09,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:09,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:09,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:09,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:09,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:09,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:09,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 200 transitions, 2705 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:09,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:09,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:09,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:10,227 INFO L124 PetriNetUnfolderBase]: 3067/4711 cut-off events. [2024-06-14 12:57:10,228 INFO L125 PetriNetUnfolderBase]: For 182081/182083 co-relation queries the response was YES. [2024-06-14 12:57:10,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34833 conditions, 4711 events. 3067/4711 cut-off events. For 182081/182083 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25376 event pairs, 735 based on Foata normal form. 4/4714 useless extension candidates. Maximal degree in co-relation 34756. Up to 4249 conditions per place. [2024-06-14 12:57:10,273 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 65 changer transitions 0/232 dead transitions. [2024-06-14 12:57:10,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 232 transitions, 3293 flow [2024-06-14 12:57:10,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:10,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:10,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:57:10,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:57:10,275 INFO L175 Difference]: Start difference. First operand has 163 places, 200 transitions, 2705 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:57:10,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 232 transitions, 3293 flow [2024-06-14 12:57:10,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 232 transitions, 3134 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:10,625 INFO L231 Difference]: Finished difference. Result has 165 places, 202 transitions, 2737 flow [2024-06-14 12:57:10,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2546, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2737, PETRI_PLACES=165, PETRI_TRANSITIONS=202} [2024-06-14 12:57:10,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-14 12:57:10,626 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 202 transitions, 2737 flow [2024-06-14 12:57:10,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:10,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:10,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:10,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:57:10,626 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)] === [2024-06-14 12:57:10,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:10,627 INFO L85 PathProgramCache]: Analyzing trace with hash -1541530541, now seen corresponding path program 6 times [2024-06-14 12:57:10,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:10,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722621833] [2024-06-14 12:57:10,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:10,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:10,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:11,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:11,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:11,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722621833] [2024-06-14 12:57:11,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722621833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:11,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:11,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:11,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688145683] [2024-06-14 12:57:11,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:11,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:11,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:11,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:11,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:11,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:11,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 202 transitions, 2737 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:11,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:11,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:11,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:12,579 INFO L124 PetriNetUnfolderBase]: 3031/4655 cut-off events. [2024-06-14 12:57:12,579 INFO L125 PetriNetUnfolderBase]: For 187008/187010 co-relation queries the response was YES. [2024-06-14 12:57:12,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34044 conditions, 4655 events. 3031/4655 cut-off events. For 187008/187010 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 24940 event pairs, 612 based on Foata normal form. 20/4674 useless extension candidates. Maximal degree in co-relation 33966. Up to 4110 conditions per place. [2024-06-14 12:57:12,615 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 179 selfloop transitions, 60 changer transitions 0/242 dead transitions. [2024-06-14 12:57:12,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 242 transitions, 3333 flow [2024-06-14 12:57:12,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:12,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:12,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2024-06-14 12:57:12,617 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4603658536585366 [2024-06-14 12:57:12,617 INFO L175 Difference]: Start difference. First operand has 165 places, 202 transitions, 2737 flow. Second operand 8 states and 151 transitions. [2024-06-14 12:57:12,617 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 242 transitions, 3333 flow [2024-06-14 12:57:12,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 242 transitions, 3158 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:12,843 INFO L231 Difference]: Finished difference. Result has 167 places, 202 transitions, 2695 flow [2024-06-14 12:57:12,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=142, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2695, PETRI_PLACES=167, PETRI_TRANSITIONS=202} [2024-06-14 12:57:12,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 125 predicate places. [2024-06-14 12:57:12,844 INFO L495 AbstractCegarLoop]: Abstraction has has 167 places, 202 transitions, 2695 flow [2024-06-14 12:57:12,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 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) [2024-06-14 12:57:12,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:12,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:12,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:57:12,844 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:12,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:12,845 INFO L85 PathProgramCache]: Analyzing trace with hash 1895094671, now seen corresponding path program 2 times [2024-06-14 12:57:12,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:12,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451464318] [2024-06-14 12:57:12,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:12,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:12,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:13,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:13,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:13,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451464318] [2024-06-14 12:57:13,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451464318] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:13,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:13,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:13,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [78965719] [2024-06-14 12:57:13,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:13,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:13,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:13,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:13,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:13,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:13,902 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 167 places, 202 transitions, 2695 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:13,902 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:13,902 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:13,902 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:14,877 INFO L124 PetriNetUnfolderBase]: 3048/4682 cut-off events. [2024-06-14 12:57:14,877 INFO L125 PetriNetUnfolderBase]: For 187316/187318 co-relation queries the response was YES. [2024-06-14 12:57:14,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34377 conditions, 4682 events. 3048/4682 cut-off events. For 187316/187318 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25221 event pairs, 697 based on Foata normal form. 4/4685 useless extension candidates. Maximal degree in co-relation 34298. Up to 3875 conditions per place. [2024-06-14 12:57:14,917 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 163 selfloop transitions, 72 changer transitions 0/238 dead transitions. [2024-06-14 12:57:14,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 238 transitions, 3317 flow [2024-06-14 12:57:14,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:14,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:14,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:57:14,920 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 12:57:14,920 INFO L175 Difference]: Start difference. First operand has 167 places, 202 transitions, 2695 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:57:14,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 238 transitions, 3317 flow [2024-06-14 12:57:15,143 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 238 transitions, 3184 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:15,146 INFO L231 Difference]: Finished difference. Result has 168 places, 204 transitions, 2770 flow [2024-06-14 12:57:15,146 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2562, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2770, PETRI_PLACES=168, PETRI_TRANSITIONS=204} [2024-06-14 12:57:15,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-14 12:57:15,147 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 204 transitions, 2770 flow [2024-06-14 12:57:15,147 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:15,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:15,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:15,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:57:15,147 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)] === [2024-06-14 12:57:15,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:15,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1165268669, now seen corresponding path program 3 times [2024-06-14 12:57:15,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:15,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097849979] [2024-06-14 12:57:15,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:15,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:15,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:16,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:16,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:16,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097849979] [2024-06-14 12:57:16,033 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097849979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:16,033 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:16,033 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:16,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156570232] [2024-06-14 12:57:16,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:16,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:16,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:16,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:16,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:16,109 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:16,110 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 204 transitions, 2770 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:16,110 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:16,110 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:16,110 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:17,010 INFO L124 PetriNetUnfolderBase]: 3065/4709 cut-off events. [2024-06-14 12:57:17,011 INFO L125 PetriNetUnfolderBase]: For 196624/196628 co-relation queries the response was YES. [2024-06-14 12:57:17,035 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35034 conditions, 4709 events. 3065/4709 cut-off events. For 196624/196628 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25387 event pairs, 814 based on Foata normal form. 8/4716 useless extension candidates. Maximal degree in co-relation 34954. Up to 4608 conditions per place. [2024-06-14 12:57:17,051 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 208 selfloop transitions, 21 changer transitions 0/232 dead transitions. [2024-06-14 12:57:17,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 232 transitions, 3352 flow [2024-06-14 12:57:17,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:17,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:17,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:57:17,052 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:17,052 INFO L175 Difference]: Start difference. First operand has 168 places, 204 transitions, 2770 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:57:17,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 232 transitions, 3352 flow [2024-06-14 12:57:17,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 232 transitions, 3166 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:17,321 INFO L231 Difference]: Finished difference. Result has 170 places, 206 transitions, 2693 flow [2024-06-14 12:57:17,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2693, PETRI_PLACES=170, PETRI_TRANSITIONS=206} [2024-06-14 12:57:17,321 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-14 12:57:17,322 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 206 transitions, 2693 flow [2024-06-14 12:57:17,322 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:17,322 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:17,322 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:17,322 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:57:17,322 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)] === [2024-06-14 12:57:17,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:17,323 INFO L85 PathProgramCache]: Analyzing trace with hash -1165261229, now seen corresponding path program 4 times [2024-06-14 12:57:17,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:17,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809524116] [2024-06-14 12:57:17,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:17,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:17,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:18,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:18,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:18,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809524116] [2024-06-14 12:57:18,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809524116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:18,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:18,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:18,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318839953] [2024-06-14 12:57:18,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:18,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:18,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:18,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:18,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:18,262 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:18,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 206 transitions, 2693 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:18,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:18,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:18,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:19,131 INFO L124 PetriNetUnfolderBase]: 3082/4736 cut-off events. [2024-06-14 12:57:19,131 INFO L125 PetriNetUnfolderBase]: For 207598/207602 co-relation queries the response was YES. [2024-06-14 12:57:19,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35205 conditions, 4736 events. 3082/4736 cut-off events. For 207598/207602 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25576 event pairs, 819 based on Foata normal form. 8/4743 useless extension candidates. Maximal degree in co-relation 35124. Up to 4594 conditions per place. [2024-06-14 12:57:19,174 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 207 selfloop transitions, 24 changer transitions 0/234 dead transitions. [2024-06-14 12:57:19,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 234 transitions, 3279 flow [2024-06-14 12:57:19,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:19,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:19,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 12:57:19,176 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 12:57:19,176 INFO L175 Difference]: Start difference. First operand has 170 places, 206 transitions, 2693 flow. Second operand 8 states and 129 transitions. [2024-06-14 12:57:19,176 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 234 transitions, 3279 flow [2024-06-14 12:57:19,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 234 transitions, 3192 flow, removed 24 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:19,435 INFO L231 Difference]: Finished difference. Result has 172 places, 208 transitions, 2723 flow [2024-06-14 12:57:19,435 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2606, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2723, PETRI_PLACES=172, PETRI_TRANSITIONS=208} [2024-06-14 12:57:19,435 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 12:57:19,435 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 208 transitions, 2723 flow [2024-06-14 12:57:19,436 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:19,436 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:19,436 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:19,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:57:19,436 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)] === [2024-06-14 12:57:19,436 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:19,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1324549021, now seen corresponding path program 5 times [2024-06-14 12:57:19,437 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:19,437 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100812540] [2024-06-14 12:57:19,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:19,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:19,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:20,513 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:20,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:20,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100812540] [2024-06-14 12:57:20,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100812540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:20,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:20,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:20,514 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155104398] [2024-06-14 12:57:20,514 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:20,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:20,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:20,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:20,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:20,606 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:20,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 208 transitions, 2723 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:20,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:20,607 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:20,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:21,507 INFO L124 PetriNetUnfolderBase]: 3074/4723 cut-off events. [2024-06-14 12:57:21,507 INFO L125 PetriNetUnfolderBase]: For 213927/213931 co-relation queries the response was YES. [2024-06-14 12:57:21,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35198 conditions, 4723 events. 3074/4723 cut-off events. For 213927/213931 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25505 event pairs, 808 based on Foata normal form. 8/4730 useless extension candidates. Maximal degree in co-relation 35116. Up to 4499 conditions per place. [2024-06-14 12:57:21,551 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 203 selfloop transitions, 34 changer transitions 0/240 dead transitions. [2024-06-14 12:57:21,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 240 transitions, 3549 flow [2024-06-14 12:57:21,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:21,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:21,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:57:21,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:57:21,552 INFO L175 Difference]: Start difference. First operand has 172 places, 208 transitions, 2723 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:57:21,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 240 transitions, 3549 flow [2024-06-14 12:57:21,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 240 transitions, 3452 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:21,893 INFO L231 Difference]: Finished difference. Result has 175 places, 212 transitions, 2846 flow [2024-06-14 12:57:21,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2626, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2846, PETRI_PLACES=175, PETRI_TRANSITIONS=212} [2024-06-14 12:57:21,894 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 12:57:21,894 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 212 transitions, 2846 flow [2024-06-14 12:57:21,899 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:21,899 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:21,899 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:21,899 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:57:21,899 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:21,899 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 1416126177, now seen corresponding path program 6 times [2024-06-14 12:57:21,900 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:21,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141818035] [2024-06-14 12:57:21,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:21,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:21,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:22,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:22,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:22,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141818035] [2024-06-14 12:57:22,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141818035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:22,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:22,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:22,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184241907] [2024-06-14 12:57:22,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:22,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:22,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:22,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:22,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:22,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:22,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 212 transitions, 2846 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:22,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:22,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:22,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:23,900 INFO L124 PetriNetUnfolderBase]: 3066/4711 cut-off events. [2024-06-14 12:57:23,901 INFO L125 PetriNetUnfolderBase]: For 220526/220530 co-relation queries the response was YES. [2024-06-14 12:57:23,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35268 conditions, 4711 events. 3066/4711 cut-off events. For 220526/220530 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25400 event pairs, 811 based on Foata normal form. 8/4718 useless extension candidates. Maximal degree in co-relation 35184. Up to 4575 conditions per place. [2024-06-14 12:57:23,945 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 207 selfloop transitions, 28 changer transitions 0/238 dead transitions. [2024-06-14 12:57:23,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 238 transitions, 3384 flow [2024-06-14 12:57:23,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:57:23,947 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:23,947 INFO L175 Difference]: Start difference. First operand has 175 places, 212 transitions, 2846 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:57:23,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 238 transitions, 3384 flow [2024-06-14 12:57:24,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 238 transitions, 3258 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:24,286 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 2786 flow [2024-06-14 12:57:24,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2720, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2786, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2024-06-14 12:57:24,287 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-14 12:57:24,287 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 2786 flow [2024-06-14 12:57:24,287 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:24,287 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:24,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:24,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:57:24,288 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:24,288 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:24,288 INFO L85 PathProgramCache]: Analyzing trace with hash -1324289551, now seen corresponding path program 7 times [2024-06-14 12:57:24,288 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:24,288 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529106788] [2024-06-14 12:57:24,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:24,288 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:24,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:25,186 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:25,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:25,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529106788] [2024-06-14 12:57:25,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [529106788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:25,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:25,187 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:25,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893561437] [2024-06-14 12:57:25,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:25,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:25,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:25,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:25,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:25,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:25,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 2786 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:25,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:25,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:25,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:26,208 INFO L124 PetriNetUnfolderBase]: 3058/4699 cut-off events. [2024-06-14 12:57:26,208 INFO L125 PetriNetUnfolderBase]: For 223643/223647 co-relation queries the response was YES. [2024-06-14 12:57:26,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35008 conditions, 4699 events. 3058/4699 cut-off events. For 223643/223647 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25295 event pairs, 761 based on Foata normal form. 8/4706 useless extension candidates. Maximal degree in co-relation 34922. Up to 4594 conditions per place. [2024-06-14 12:57:26,254 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 219 selfloop transitions, 18 changer transitions 0/240 dead transitions. [2024-06-14 12:57:26,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 240 transitions, 3384 flow [2024-06-14 12:57:26,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:57:26,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:57:26,255 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 2786 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:57:26,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 240 transitions, 3384 flow [2024-06-14 12:57:26,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 240 transitions, 3320 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:26,535 INFO L231 Difference]: Finished difference. Result has 180 places, 214 transitions, 2829 flow [2024-06-14 12:57:26,536 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2722, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2829, PETRI_PLACES=180, PETRI_TRANSITIONS=214} [2024-06-14 12:57:26,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 138 predicate places. [2024-06-14 12:57:26,536 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 214 transitions, 2829 flow [2024-06-14 12:57:26,536 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:26,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:26,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:26,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:57:26,537 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:26,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:26,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1520341587, now seen corresponding path program 1 times [2024-06-14 12:57:26,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:26,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383755745] [2024-06-14 12:57:26,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:26,538 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:26,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:27,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:27,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:27,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383755745] [2024-06-14 12:57:27,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383755745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:27,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:27,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:27,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830541686] [2024-06-14 12:57:27,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:27,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:27,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:27,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:27,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:27,386 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:27,386 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 214 transitions, 2829 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:27,386 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:27,386 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:27,386 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:28,152 INFO L124 PetriNetUnfolderBase]: 3019/4639 cut-off events. [2024-06-14 12:57:28,153 INFO L125 PetriNetUnfolderBase]: For 232794/232798 co-relation queries the response was YES. [2024-06-14 12:57:28,178 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34647 conditions, 4639 events. 3019/4639 cut-off events. For 232794/232798 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 24924 event pairs, 759 based on Foata normal form. 12/4650 useless extension candidates. Maximal degree in co-relation 34560. Up to 4327 conditions per place. [2024-06-14 12:57:28,194 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 192 selfloop transitions, 56 changer transitions 0/251 dead transitions. [2024-06-14 12:57:28,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3731 flow [2024-06-14 12:57:28,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:57:28,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:57:28,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2024-06-14 12:57:28,199 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46747967479674796 [2024-06-14 12:57:28,199 INFO L175 Difference]: Start difference. First operand has 180 places, 214 transitions, 2829 flow. Second operand 6 states and 115 transitions. [2024-06-14 12:57:28,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3731 flow [2024-06-14 12:57:28,496 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 251 transitions, 3642 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:28,499 INFO L231 Difference]: Finished difference. Result has 181 places, 224 transitions, 3144 flow [2024-06-14 12:57:28,500 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2740, PETRI_DIFFERENCE_MINUEND_PLACES=174, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3144, PETRI_PLACES=181, PETRI_TRANSITIONS=224} [2024-06-14 12:57:28,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-14 12:57:28,501 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 224 transitions, 3144 flow [2024-06-14 12:57:28,501 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:28,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:28,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:28,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:57:28,502 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:28,502 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:28,502 INFO L85 PathProgramCache]: Analyzing trace with hash 558532967, now seen corresponding path program 1 times [2024-06-14 12:57:28,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:28,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756263981] [2024-06-14 12:57:28,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:28,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:28,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:29,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:29,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756263981] [2024-06-14 12:57:29,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756263981] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:29,167 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:29,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:29,167 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693234911] [2024-06-14 12:57:29,167 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:29,167 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:29,167 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:29,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:29,168 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:29,215 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:29,216 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 224 transitions, 3144 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:29,216 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:29,216 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:29,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:30,099 INFO L124 PetriNetUnfolderBase]: 3029/4652 cut-off events. [2024-06-14 12:57:30,099 INFO L125 PetriNetUnfolderBase]: For 239151/239151 co-relation queries the response was YES. [2024-06-14 12:57:30,130 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35594 conditions, 4652 events. 3029/4652 cut-off events. For 239151/239151 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25016 event pairs, 780 based on Foata normal form. 2/4653 useless extension candidates. Maximal degree in co-relation 35505. Up to 4587 conditions per place. [2024-06-14 12:57:30,149 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 229 selfloop transitions, 23 changer transitions 0/255 dead transitions. [2024-06-14 12:57:30,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 255 transitions, 3923 flow [2024-06-14 12:57:30,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:30,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:30,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 12:57:30,151 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:30,151 INFO L175 Difference]: Start difference. First operand has 181 places, 224 transitions, 3144 flow. Second operand 7 states and 112 transitions. [2024-06-14 12:57:30,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 255 transitions, 3923 flow [2024-06-14 12:57:30,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 185 places, 255 transitions, 3838 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-14 12:57:30,532 INFO L231 Difference]: Finished difference. Result has 188 places, 236 transitions, 3274 flow [2024-06-14 12:57:30,532 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3062, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3274, PETRI_PLACES=188, PETRI_TRANSITIONS=236} [2024-06-14 12:57:30,532 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 12:57:30,532 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 236 transitions, 3274 flow [2024-06-14 12:57:30,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:30,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:30,533 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:30,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:57:30,533 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:30,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:30,533 INFO L85 PathProgramCache]: Analyzing trace with hash 1435810825, now seen corresponding path program 2 times [2024-06-14 12:57:30,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:30,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517475312] [2024-06-14 12:57:30,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:30,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:30,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:31,337 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:31,337 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:31,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517475312] [2024-06-14 12:57:31,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517475312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:31,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:31,338 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:31,338 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854476866] [2024-06-14 12:57:31,338 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:31,338 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:31,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:31,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:31,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:31,415 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:31,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 236 transitions, 3274 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:31,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:31,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:31,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:32,354 INFO L124 PetriNetUnfolderBase]: 3074/4715 cut-off events. [2024-06-14 12:57:32,355 INFO L125 PetriNetUnfolderBase]: For 251759/251759 co-relation queries the response was YES. [2024-06-14 12:57:32,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36401 conditions, 4715 events. 3074/4715 cut-off events. For 251759/251759 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25321 event pairs, 784 based on Foata normal form. 6/4720 useless extension candidates. Maximal degree in co-relation 36308. Up to 4640 conditions per place. [2024-06-14 12:57:32,407 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 231 selfloop transitions, 33 changer transitions 0/267 dead transitions. [2024-06-14 12:57:32,408 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 194 places, 267 transitions, 4039 flow [2024-06-14 12:57:32,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:32,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:32,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 12:57:32,409 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 12:57:32,409 INFO L175 Difference]: Start difference. First operand has 188 places, 236 transitions, 3274 flow. Second operand 7 states and 114 transitions. [2024-06-14 12:57:32,409 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 194 places, 267 transitions, 4039 flow [2024-06-14 12:57:32,793 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 267 transitions, 3971 flow, removed 33 selfloop flow, removed 1 redundant places. [2024-06-14 12:57:32,821 INFO L231 Difference]: Finished difference. Result has 194 places, 249 transitions, 3477 flow [2024-06-14 12:57:32,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3222, PETRI_DIFFERENCE_MINUEND_PLACES=187, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3477, PETRI_PLACES=194, PETRI_TRANSITIONS=249} [2024-06-14 12:57:32,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 12:57:32,822 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 249 transitions, 3477 flow [2024-06-14 12:57:32,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:32,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:32,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:32,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:57:32,826 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:32,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:32,826 INFO L85 PathProgramCache]: Analyzing trace with hash -864725963, now seen corresponding path program 3 times [2024-06-14 12:57:32,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:32,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580538619] [2024-06-14 12:57:32,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:32,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:32,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:33,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:33,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:33,608 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580538619] [2024-06-14 12:57:33,608 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580538619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:33,608 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:33,608 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:33,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254277733] [2024-06-14 12:57:33,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:33,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:33,609 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:33,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:33,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:33,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:33,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 249 transitions, 3477 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:33,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:33,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:33,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:34,625 INFO L124 PetriNetUnfolderBase]: 3088/4735 cut-off events. [2024-06-14 12:57:34,625 INFO L125 PetriNetUnfolderBase]: For 259604/259604 co-relation queries the response was YES. [2024-06-14 12:57:34,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36993 conditions, 4735 events. 3088/4735 cut-off events. For 259604/259604 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 25434 event pairs, 789 based on Foata normal form. 6/4740 useless extension candidates. Maximal degree in co-relation 36897. Up to 4620 conditions per place. [2024-06-14 12:57:34,674 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 224 selfloop transitions, 43 changer transitions 0/270 dead transitions. [2024-06-14 12:57:34,674 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 270 transitions, 4110 flow [2024-06-14 12:57:34,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:57:34,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:57:34,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 12:57:34,675 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 12:57:34,675 INFO L175 Difference]: Start difference. First operand has 194 places, 249 transitions, 3477 flow. Second operand 6 states and 105 transitions. [2024-06-14 12:57:34,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 270 transitions, 4110 flow [2024-06-14 12:57:35,099 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 270 transitions, 3951 flow, removed 52 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:35,102 INFO L231 Difference]: Finished difference. Result has 196 places, 252 transitions, 3484 flow [2024-06-14 12:57:35,103 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3318, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=249, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=206, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3484, PETRI_PLACES=196, PETRI_TRANSITIONS=252} [2024-06-14 12:57:35,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 154 predicate places. [2024-06-14 12:57:35,103 INFO L495 AbstractCegarLoop]: Abstraction has has 196 places, 252 transitions, 3484 flow [2024-06-14 12:57:35,103 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:35,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:35,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:35,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:57:35,104 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:35,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:35,104 INFO L85 PathProgramCache]: Analyzing trace with hash 971201951, now seen corresponding path program 1 times [2024-06-14 12:57:35,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:35,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332874253] [2024-06-14 12:57:35,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:35,104 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:35,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:36,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:36,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:36,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332874253] [2024-06-14 12:57:36,398 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332874253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:36,398 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:36,398 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:36,398 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379358610] [2024-06-14 12:57:36,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:36,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:36,399 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:36,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:36,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:36,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:36,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 196 places, 252 transitions, 3484 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:57:36,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:36,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:36,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:37,298 INFO L124 PetriNetUnfolderBase]: 3083/4728 cut-off events. [2024-06-14 12:57:37,299 INFO L125 PetriNetUnfolderBase]: For 263443/263443 co-relation queries the response was YES. [2024-06-14 12:57:37,332 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37294 conditions, 4728 events. 3083/4728 cut-off events. For 263443/263443 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 25312 event pairs, 790 based on Foata normal form. 2/4729 useless extension candidates. Maximal degree in co-relation 37197. Up to 4700 conditions per place. [2024-06-14 12:57:37,352 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 249 selfloop transitions, 12 changer transitions 0/264 dead transitions. [2024-06-14 12:57:37,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 264 transitions, 4069 flow [2024-06-14 12:57:37,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:57:37,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:57:37,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-14 12:57:37,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-14 12:57:37,353 INFO L175 Difference]: Start difference. First operand has 196 places, 252 transitions, 3484 flow. Second operand 5 states and 81 transitions. [2024-06-14 12:57:37,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 264 transitions, 4069 flow [2024-06-14 12:57:37,756 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 264 transitions, 3971 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 12:57:37,777 INFO L231 Difference]: Finished difference. Result has 197 places, 254 transitions, 3455 flow [2024-06-14 12:57:37,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3388, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=252, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3455, PETRI_PLACES=197, PETRI_TRANSITIONS=254} [2024-06-14 12:57:37,778 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-14 12:57:37,778 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 254 transitions, 3455 flow [2024-06-14 12:57:37,778 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:57:37,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:37,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:37,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:57:37,778 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)] === [2024-06-14 12:57:37,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:37,779 INFO L85 PathProgramCache]: Analyzing trace with hash 331714182, now seen corresponding path program 1 times [2024-06-14 12:57:37,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:37,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103786901] [2024-06-14 12:57:37,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:37,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:37,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:38,843 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:38,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:38,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103786901] [2024-06-14 12:57:38,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103786901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:38,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:38,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:38,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090069154] [2024-06-14 12:57:38,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:38,844 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:38,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:38,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:38,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:38,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:38,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 254 transitions, 3455 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 12:57:38,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:38,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:38,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:39,862 INFO L124 PetriNetUnfolderBase]: 3063/4698 cut-off events. [2024-06-14 12:57:39,862 INFO L125 PetriNetUnfolderBase]: For 259882/259884 co-relation queries the response was YES. [2024-06-14 12:57:40,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36265 conditions, 4698 events. 3063/4698 cut-off events. For 259882/259884 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 25162 event pairs, 683 based on Foata normal form. 12/4709 useless extension candidates. Maximal degree in co-relation 36167. Up to 4316 conditions per place. [2024-06-14 12:57:40,062 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 238 selfloop transitions, 46 changer transitions 0/287 dead transitions. [2024-06-14 12:57:40,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 204 places, 287 transitions, 4127 flow [2024-06-14 12:57:40,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:40,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:40,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:57:40,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:57:40,064 INFO L175 Difference]: Start difference. First operand has 197 places, 254 transitions, 3455 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:57:40,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 204 places, 287 transitions, 4127 flow [2024-06-14 12:57:40,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 287 transitions, 4066 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 12:57:40,421 INFO L231 Difference]: Finished difference. Result has 203 places, 255 transitions, 3512 flow [2024-06-14 12:57:40,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3394, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=254, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3512, PETRI_PLACES=203, PETRI_TRANSITIONS=255} [2024-06-14 12:57:40,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 12:57:40,422 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 255 transitions, 3512 flow [2024-06-14 12:57:40,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 12:57:40,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:40,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:40,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:57:40,422 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:40,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:40,423 INFO L85 PathProgramCache]: Analyzing trace with hash -210957852, now seen corresponding path program 1 times [2024-06-14 12:57:40,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:40,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294927789] [2024-06-14 12:57:40,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:40,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:40,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:41,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:41,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:41,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294927789] [2024-06-14 12:57:41,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294927789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:41,536 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:41,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:41,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081283234] [2024-06-14 12:57:41,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:41,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:41,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:41,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:41,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:41,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:41,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 255 transitions, 3512 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:57:41,604 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:41,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:41,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:42,644 INFO L124 PetriNetUnfolderBase]: 3103/4753 cut-off events. [2024-06-14 12:57:42,644 INFO L125 PetriNetUnfolderBase]: For 259618/259622 co-relation queries the response was YES. [2024-06-14 12:57:42,676 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37049 conditions, 4753 events. 3103/4753 cut-off events. For 259618/259622 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 25486 event pairs, 758 based on Foata normal form. 6/4758 useless extension candidates. Maximal degree in co-relation 36949. Up to 4491 conditions per place. [2024-06-14 12:57:42,694 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 250 selfloop transitions, 47 changer transitions 0/300 dead transitions. [2024-06-14 12:57:42,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 300 transitions, 4362 flow [2024-06-14 12:57:42,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:42,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:42,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:57:42,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 12:57:42,696 INFO L175 Difference]: Start difference. First operand has 203 places, 255 transitions, 3512 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:57:42,696 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 300 transitions, 4362 flow [2024-06-14 12:57:43,085 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 300 transitions, 4248 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:43,088 INFO L231 Difference]: Finished difference. Result has 206 places, 263 transitions, 3629 flow [2024-06-14 12:57:43,089 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=197, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3629, PETRI_PLACES=206, PETRI_TRANSITIONS=263} [2024-06-14 12:57:43,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-14 12:57:43,089 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 263 transitions, 3629 flow [2024-06-14 12:57:43,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:57:43,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:43,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:43,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:57:43,090 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)] === [2024-06-14 12:57:43,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:43,090 INFO L85 PathProgramCache]: Analyzing trace with hash -542621144, now seen corresponding path program 2 times [2024-06-14 12:57:43,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:43,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508176481] [2024-06-14 12:57:43,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:43,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:43,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:44,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:44,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:44,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508176481] [2024-06-14 12:57:44,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508176481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:44,127 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:44,127 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:57:44,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836893219] [2024-06-14 12:57:44,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:44,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:57:44,129 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:44,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:57:44,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:57:44,218 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:44,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 263 transitions, 3629 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 12:57:44,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:44,218 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:44,218 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:45,232 INFO L124 PetriNetUnfolderBase]: 3083/4722 cut-off events. [2024-06-14 12:57:45,232 INFO L125 PetriNetUnfolderBase]: For 265802/265804 co-relation queries the response was YES. [2024-06-14 12:57:45,271 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36861 conditions, 4722 events. 3083/4722 cut-off events. For 265802/265804 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 25261 event pairs, 686 based on Foata normal form. 12/4733 useless extension candidates. Maximal degree in co-relation 36760. Up to 4274 conditions per place. [2024-06-14 12:57:45,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 241 selfloop transitions, 55 changer transitions 0/299 dead transitions. [2024-06-14 12:57:45,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 299 transitions, 4335 flow [2024-06-14 12:57:45,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:45,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:45,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:57:45,294 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 12:57:45,294 INFO L175 Difference]: Start difference. First operand has 206 places, 263 transitions, 3629 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:57:45,294 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 299 transitions, 4335 flow [2024-06-14 12:57:45,833 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 299 transitions, 4172 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:57:45,837 INFO L231 Difference]: Finished difference. Result has 209 places, 264 transitions, 3613 flow [2024-06-14 12:57:45,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3466, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3613, PETRI_PLACES=209, PETRI_TRANSITIONS=264} [2024-06-14 12:57:45,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 167 predicate places. [2024-06-14 12:57:45,838 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 264 transitions, 3613 flow [2024-06-14 12:57:45,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 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) [2024-06-14 12:57:45,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:45,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:45,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:57:45,839 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:45,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:45,839 INFO L85 PathProgramCache]: Analyzing trace with hash -1381606484, now seen corresponding path program 3 times [2024-06-14 12:57:45,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:45,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239452541] [2024-06-14 12:57:45,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:45,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:45,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:47,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:47,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:47,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239452541] [2024-06-14 12:57:47,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239452541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:47,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:47,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:57:47,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475344691] [2024-06-14 12:57:47,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:47,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:57:47,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:47,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:57:47,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:57:47,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:47,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 264 transitions, 3613 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:47,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:47,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:47,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:48,498 INFO L124 PetriNetUnfolderBase]: 3124/4793 cut-off events. [2024-06-14 12:57:48,498 INFO L125 PetriNetUnfolderBase]: For 277285/277287 co-relation queries the response was YES. [2024-06-14 12:57:48,535 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37424 conditions, 4793 events. 3124/4793 cut-off events. For 277285/277287 co-relation queries the response was YES. Maximal size of possible extension queue 247. Compared 25814 event pairs, 655 based on Foata normal form. 12/4804 useless extension candidates. Maximal degree in co-relation 37321. Up to 3917 conditions per place. [2024-06-14 12:57:48,554 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 75 changer transitions 0/306 dead transitions. [2024-06-14 12:57:48,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 306 transitions, 4385 flow [2024-06-14 12:57:48,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:48,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:48,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 12:57:48,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 12:57:48,556 INFO L175 Difference]: Start difference. First operand has 209 places, 264 transitions, 3613 flow. Second operand 9 states and 158 transitions. [2024-06-14 12:57:48,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 306 transitions, 4385 flow [2024-06-14 12:57:48,997 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 306 transitions, 4235 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:49,001 INFO L231 Difference]: Finished difference. Result has 211 places, 265 transitions, 3655 flow [2024-06-14 12:57:49,001 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3463, PETRI_DIFFERENCE_MINUEND_PLACES=202, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3655, PETRI_PLACES=211, PETRI_TRANSITIONS=265} [2024-06-14 12:57:49,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-14 12:57:49,001 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 265 transitions, 3655 flow [2024-06-14 12:57:49,002 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:49,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:49,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:49,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:57:49,002 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)] === [2024-06-14 12:57:49,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:49,002 INFO L85 PathProgramCache]: Analyzing trace with hash 138365092, now seen corresponding path program 1 times [2024-06-14 12:57:49,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:49,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2022141168] [2024-06-14 12:57:49,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:49,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:49,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:49,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:49,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:49,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2022141168] [2024-06-14 12:57:49,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2022141168] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:49,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:49,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:49,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646281277] [2024-06-14 12:57:49,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:49,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:49,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:49,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:49,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:49,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:49,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 265 transitions, 3655 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:49,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:49,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:49,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:50,841 INFO L124 PetriNetUnfolderBase]: 3144/4819 cut-off events. [2024-06-14 12:57:50,841 INFO L125 PetriNetUnfolderBase]: For 278464/278464 co-relation queries the response was YES. [2024-06-14 12:57:50,880 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37893 conditions, 4819 events. 3144/4819 cut-off events. For 278464/278464 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 25965 event pairs, 776 based on Foata normal form. 4/4822 useless extension candidates. Maximal degree in co-relation 37790. Up to 4752 conditions per place. [2024-06-14 12:57:50,900 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 253 selfloop transitions, 32 changer transitions 0/288 dead transitions. [2024-06-14 12:57:50,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 288 transitions, 4406 flow [2024-06-14 12:57:50,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:57:50,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:57:50,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 12:57:50,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 12:57:50,902 INFO L175 Difference]: Start difference. First operand has 211 places, 265 transitions, 3655 flow. Second operand 7 states and 113 transitions. [2024-06-14 12:57:50,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 288 transitions, 4406 flow [2024-06-14 12:57:51,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 288 transitions, 4232 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 12:57:51,426 INFO L231 Difference]: Finished difference. Result has 211 places, 270 transitions, 3679 flow [2024-06-14 12:57:51,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3481, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=265, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3679, PETRI_PLACES=211, PETRI_TRANSITIONS=270} [2024-06-14 12:57:51,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 169 predicate places. [2024-06-14 12:57:51,427 INFO L495 AbstractCegarLoop]: Abstraction has has 211 places, 270 transitions, 3679 flow [2024-06-14 12:57:51,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:51,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:51,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:51,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:57:51,428 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:51,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:51,428 INFO L85 PathProgramCache]: Analyzing trace with hash 493826826, now seen corresponding path program 4 times [2024-06-14 12:57:51,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:51,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130188233] [2024-06-14 12:57:51,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:51,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:51,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:52,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:52,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130188233] [2024-06-14 12:57:52,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130188233] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:52,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:52,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:57:52,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813073409] [2024-06-14 12:57:52,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:52,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:57:52,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:52,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:57:52,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:57:52,566 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:52,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 211 places, 270 transitions, 3679 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:57:52,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:52,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:52,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:53,482 INFO L124 PetriNetUnfolderBase]: 3124/4789 cut-off events. [2024-06-14 12:57:53,482 INFO L125 PetriNetUnfolderBase]: For 280035/280037 co-relation queries the response was YES. [2024-06-14 12:57:53,515 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36866 conditions, 4789 events. 3124/4789 cut-off events. For 280035/280037 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25749 event pairs, 735 based on Foata normal form. 12/4800 useless extension candidates. Maximal degree in co-relation 36762. Up to 4614 conditions per place. [2024-06-14 12:57:53,533 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 278 selfloop transitions, 18 changer transitions 0/299 dead transitions. [2024-06-14 12:57:53,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 218 places, 299 transitions, 4351 flow [2024-06-14 12:57:53,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:57:53,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:57:53,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:57:53,535 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:57:53,535 INFO L175 Difference]: Start difference. First operand has 211 places, 270 transitions, 3679 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:57:53,535 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 218 places, 299 transitions, 4351 flow [2024-06-14 12:57:53,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 299 transitions, 4239 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:57:53,950 INFO L231 Difference]: Finished difference. Result has 214 places, 270 transitions, 3609 flow [2024-06-14 12:57:53,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=206, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3609, PETRI_PLACES=214, PETRI_TRANSITIONS=270} [2024-06-14 12:57:53,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 12:57:53,950 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 270 transitions, 3609 flow [2024-06-14 12:57:53,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:57:53,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:53,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:53,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 12:57:53,951 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:57:53,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:53,951 INFO L85 PathProgramCache]: Analyzing trace with hash 1888654168, now seen corresponding path program 5 times [2024-06-14 12:57:53,951 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:53,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1990891354] [2024-06-14 12:57:53,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:53,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:53,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:55,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:55,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:55,198 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1990891354] [2024-06-14 12:57:55,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1990891354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:55,198 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:55,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 12:57:55,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314123515] [2024-06-14 12:57:55,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:55,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 12:57:55,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:55,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 12:57:55,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 12:57:55,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:55,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 270 transitions, 3609 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:55,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:55,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:55,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:56,401 INFO L124 PetriNetUnfolderBase]: 3104/4756 cut-off events. [2024-06-14 12:57:56,401 INFO L125 PetriNetUnfolderBase]: For 274503/274507 co-relation queries the response was YES. [2024-06-14 12:57:56,430 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36148 conditions, 4756 events. 3104/4756 cut-off events. For 274503/274507 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 25554 event pairs, 728 based on Foata normal form. 16/4771 useless extension candidates. Maximal degree in co-relation 36043. Up to 4459 conditions per place. [2024-06-14 12:57:56,446 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 35 changer transitions 0/302 dead transitions. [2024-06-14 12:57:56,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 221 places, 302 transitions, 4207 flow [2024-06-14 12:57:56,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:57:56,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:57:56,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:57:56,448 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 12:57:56,448 INFO L175 Difference]: Start difference. First operand has 214 places, 270 transitions, 3609 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:57:56,448 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 221 places, 302 transitions, 4207 flow [2024-06-14 12:57:56,812 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 302 transitions, 4075 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 12:57:56,816 INFO L231 Difference]: Finished difference. Result has 214 places, 269 transitions, 3460 flow [2024-06-14 12:57:56,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3460, PETRI_PLACES=214, PETRI_TRANSITIONS=269} [2024-06-14 12:57:56,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 12:57:56,816 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 269 transitions, 3460 flow [2024-06-14 12:57:56,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:56,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:56,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:56,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 12:57:56,817 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)] === [2024-06-14 12:57:56,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:56,817 INFO L85 PathProgramCache]: Analyzing trace with hash 898480152, now seen corresponding path program 2 times [2024-06-14 12:57:56,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:56,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987898488] [2024-06-14 12:57:56,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:56,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:56,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:57:57,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:57:57,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:57:57,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987898488] [2024-06-14 12:57:57,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987898488] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:57:57,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:57:57,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:57:57,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905465176] [2024-06-14 12:57:57,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:57:57,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:57:57,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:57:57,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:57:57,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:57:57,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:57:57,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 269 transitions, 3460 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:57,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:57:57,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:57:57,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:57:58,746 INFO L124 PetriNetUnfolderBase]: 3094/4741 cut-off events. [2024-06-14 12:57:58,747 INFO L125 PetriNetUnfolderBase]: For 251189/251189 co-relation queries the response was YES. [2024-06-14 12:57:58,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35226 conditions, 4741 events. 3094/4741 cut-off events. For 251189/251189 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 25457 event pairs, 746 based on Foata normal form. 4/4744 useless extension candidates. Maximal degree in co-relation 35122. Up to 4642 conditions per place. [2024-06-14 12:57:58,798 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 246 selfloop transitions, 41 changer transitions 0/290 dead transitions. [2024-06-14 12:57:58,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 290 transitions, 4175 flow [2024-06-14 12:57:58,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:57:58,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:57:58,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:57:58,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-14 12:57:58,800 INFO L175 Difference]: Start difference. First operand has 214 places, 269 transitions, 3460 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:57:58,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 290 transitions, 4175 flow [2024-06-14 12:57:59,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 209 places, 290 transitions, 3943 flow, removed 16 selfloop flow, removed 10 redundant places. [2024-06-14 12:57:59,326 INFO L231 Difference]: Finished difference. Result has 210 places, 272 transitions, 3418 flow [2024-06-14 12:57:59,326 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3228, PETRI_DIFFERENCE_MINUEND_PLACES=204, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=269, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=228, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3418, PETRI_PLACES=210, PETRI_TRANSITIONS=272} [2024-06-14 12:57:59,326 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 168 predicate places. [2024-06-14 12:57:59,327 INFO L495 AbstractCegarLoop]: Abstraction has has 210 places, 272 transitions, 3418 flow [2024-06-14 12:57:59,327 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:57:59,327 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:57:59,327 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:57:59,327 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 12:57:59,327 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)] === [2024-06-14 12:57:59,327 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:57:59,328 INFO L85 PathProgramCache]: Analyzing trace with hash 29130566, now seen corresponding path program 2 times [2024-06-14 12:57:59,328 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:57:59,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367120396] [2024-06-14 12:57:59,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:57:59,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:57:59,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:00,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:00,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:00,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367120396] [2024-06-14 12:58:00,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367120396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:00,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:00,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:00,299 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1695324635] [2024-06-14 12:58:00,299 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:00,300 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:00,300 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:00,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:00,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:00,351 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:00,352 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 272 transitions, 3418 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:00,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:00,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:00,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:01,633 INFO L124 PetriNetUnfolderBase]: 3374/5132 cut-off events. [2024-06-14 12:58:01,633 INFO L125 PetriNetUnfolderBase]: For 296955/296959 co-relation queries the response was YES. [2024-06-14 12:58:01,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38677 conditions, 5132 events. 3374/5132 cut-off events. For 296955/296959 co-relation queries the response was YES. Maximal size of possible extension queue 273. Compared 27640 event pairs, 682 based on Foata normal form. 16/5147 useless extension candidates. Maximal degree in co-relation 38574. Up to 4353 conditions per place. [2024-06-14 12:58:01,698 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 222 selfloop transitions, 121 changer transitions 0/346 dead transitions. [2024-06-14 12:58:01,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 346 transitions, 5034 flow [2024-06-14 12:58:01,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:01,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 160 transitions. [2024-06-14 12:58:01,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4878048780487805 [2024-06-14 12:58:01,699 INFO L175 Difference]: Start difference. First operand has 210 places, 272 transitions, 3418 flow. Second operand 8 states and 160 transitions. [2024-06-14 12:58:01,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 346 transitions, 5034 flow [2024-06-14 12:58:02,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 346 transitions, 4892 flow, removed 35 selfloop flow, removed 5 redundant places. [2024-06-14 12:58:02,333 INFO L231 Difference]: Finished difference. Result has 215 places, 299 transitions, 4194 flow [2024-06-14 12:58:02,334 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3310, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4194, PETRI_PLACES=215, PETRI_TRANSITIONS=299} [2024-06-14 12:58:02,334 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 12:58:02,334 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 299 transitions, 4194 flow [2024-06-14 12:58:02,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:02,334 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:02,334 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:02,335 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 12:58:02,335 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)] === [2024-06-14 12:58:02,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:02,336 INFO L85 PathProgramCache]: Analyzing trace with hash 134654113, now seen corresponding path program 1 times [2024-06-14 12:58:02,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:02,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595195980] [2024-06-14 12:58:02,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:02,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:02,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:03,441 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:03,441 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:03,441 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595195980] [2024-06-14 12:58:03,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595195980] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:03,442 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:03,442 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:03,442 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650649395] [2024-06-14 12:58:03,442 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:03,442 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:03,442 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:03,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:03,443 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:03,501 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:03,502 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 299 transitions, 4194 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:03,502 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:03,502 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:03,502 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:04,699 INFO L124 PetriNetUnfolderBase]: 3394/5159 cut-off events. [2024-06-14 12:58:04,700 INFO L125 PetriNetUnfolderBase]: For 287822/287822 co-relation queries the response was YES. [2024-06-14 12:58:04,739 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40547 conditions, 5159 events. 3394/5159 cut-off events. For 287822/287822 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 27785 event pairs, 789 based on Foata normal form. 4/5162 useless extension candidates. Maximal degree in co-relation 40442. Up to 4992 conditions per place. [2024-06-14 12:58:04,759 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 276 selfloop transitions, 50 changer transitions 0/329 dead transitions. [2024-06-14 12:58:04,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 329 transitions, 5129 flow [2024-06-14 12:58:04,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:04,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:04,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 12:58:04,761 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 12:58:04,761 INFO L175 Difference]: Start difference. First operand has 215 places, 299 transitions, 4194 flow. Second operand 8 states and 130 transitions. [2024-06-14 12:58:04,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 329 transitions, 5129 flow [2024-06-14 12:58:05,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 329 transitions, 4980 flow, removed 43 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:05,400 INFO L231 Difference]: Finished difference. Result has 219 places, 305 transitions, 4267 flow [2024-06-14 12:58:05,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4047, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4267, PETRI_PLACES=219, PETRI_TRANSITIONS=305} [2024-06-14 12:58:05,401 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 12:58:05,401 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 305 transitions, 4267 flow [2024-06-14 12:58:05,401 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:05,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:05,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:05,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 12:58:05,401 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)] === [2024-06-14 12:58:05,402 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:05,402 INFO L85 PathProgramCache]: Analyzing trace with hash 1560463935, now seen corresponding path program 2 times [2024-06-14 12:58:05,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:05,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373825637] [2024-06-14 12:58:05,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:05,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:05,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:06,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:06,463 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:06,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373825637] [2024-06-14 12:58:06,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373825637] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:06,463 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:06,463 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:06,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648542530] [2024-06-14 12:58:06,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:06,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:06,463 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:06,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:06,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:06,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:06,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 305 transitions, 4267 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:06,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:06,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:06,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:07,712 INFO L124 PetriNetUnfolderBase]: 3414/5187 cut-off events. [2024-06-14 12:58:07,713 INFO L125 PetriNetUnfolderBase]: For 285869/285869 co-relation queries the response was YES. [2024-06-14 12:58:07,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40717 conditions, 5187 events. 3414/5187 cut-off events. For 285869/285869 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 27885 event pairs, 810 based on Foata normal form. 4/5190 useless extension candidates. Maximal degree in co-relation 40611. Up to 5096 conditions per place. [2024-06-14 12:58:07,772 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 290 selfloop transitions, 36 changer transitions 0/329 dead transitions. [2024-06-14 12:58:07,772 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 329 transitions, 5044 flow [2024-06-14 12:58:07,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:07,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:07,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 12:58:07,773 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 12:58:07,773 INFO L175 Difference]: Start difference. First operand has 219 places, 305 transitions, 4267 flow. Second operand 8 states and 126 transitions. [2024-06-14 12:58:07,773 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 329 transitions, 5044 flow [2024-06-14 12:58:08,391 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 329 transitions, 4943 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:08,395 INFO L231 Difference]: Finished difference. Result has 223 places, 308 transitions, 4310 flow [2024-06-14 12:58:08,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4174, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=305, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4310, PETRI_PLACES=223, PETRI_TRANSITIONS=308} [2024-06-14 12:58:08,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 12:58:08,396 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 308 transitions, 4310 flow [2024-06-14 12:58:08,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:08,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:08,396 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:08,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 12:58:08,396 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)] === [2024-06-14 12:58:08,397 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:08,397 INFO L85 PathProgramCache]: Analyzing trace with hash 34856545, now seen corresponding path program 3 times [2024-06-14 12:58:08,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:08,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984080891] [2024-06-14 12:58:08,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:08,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:08,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:09,450 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:09,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:09,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984080891] [2024-06-14 12:58:09,450 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [984080891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:09,450 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:09,450 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:09,450 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341738510] [2024-06-14 12:58:09,450 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:09,450 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:09,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:09,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:09,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:09,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:09,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 308 transitions, 4310 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:09,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:09,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:09,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:10,735 INFO L124 PetriNetUnfolderBase]: 3402/5171 cut-off events. [2024-06-14 12:58:10,735 INFO L125 PetriNetUnfolderBase]: For 290807/290807 co-relation queries the response was YES. [2024-06-14 12:58:10,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40482 conditions, 5171 events. 3402/5171 cut-off events. For 290807/290807 co-relation queries the response was YES. Maximal size of possible extension queue 279. Compared 27851 event pairs, 785 based on Foata normal form. 4/5174 useless extension candidates. Maximal degree in co-relation 40374. Up to 5024 conditions per place. [2024-06-14 12:58:10,790 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 277 selfloop transitions, 49 changer transitions 0/329 dead transitions. [2024-06-14 12:58:10,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 329 transitions, 5023 flow [2024-06-14 12:58:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:58:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:58:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-14 12:58:10,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4076655052264808 [2024-06-14 12:58:10,792 INFO L175 Difference]: Start difference. First operand has 223 places, 308 transitions, 4310 flow. Second operand 7 states and 117 transitions. [2024-06-14 12:58:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 329 transitions, 5023 flow [2024-06-14 12:58:11,336 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 329 transitions, 4895 flow, removed 30 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:11,340 INFO L231 Difference]: Finished difference. Result has 224 places, 308 transitions, 4290 flow [2024-06-14 12:58:11,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4182, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4290, PETRI_PLACES=224, PETRI_TRANSITIONS=308} [2024-06-14 12:58:11,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 12:58:11,341 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 308 transitions, 4290 flow [2024-06-14 12:58:11,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:11,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:11,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:11,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 12:58:11,342 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)] === [2024-06-14 12:58:11,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:11,342 INFO L85 PathProgramCache]: Analyzing trace with hash -2062886996, now seen corresponding path program 1 times [2024-06-14 12:58:11,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:11,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701501537] [2024-06-14 12:58:11,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:11,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:11,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:12,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:12,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:12,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701501537] [2024-06-14 12:58:12,471 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701501537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:12,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:12,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:12,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949303117] [2024-06-14 12:58:12,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:12,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:12,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:12,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:12,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:12,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:12,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 308 transitions, 4290 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:12,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:12,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:12,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:13,806 INFO L124 PetriNetUnfolderBase]: 3558/5405 cut-off events. [2024-06-14 12:58:13,806 INFO L125 PetriNetUnfolderBase]: For 338242/338244 co-relation queries the response was YES. [2024-06-14 12:58:13,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43007 conditions, 5405 events. 3558/5405 cut-off events. For 338242/338244 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 29278 event pairs, 589 based on Foata normal form. 14/5418 useless extension candidates. Maximal degree in co-relation 42898. Up to 4419 conditions per place. [2024-06-14 12:58:13,864 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 302 selfloop transitions, 109 changer transitions 0/414 dead transitions. [2024-06-14 12:58:13,864 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 414 transitions, 6685 flow [2024-06-14 12:58:13,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:13,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:13,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-06-14 12:58:13,865 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4715447154471545 [2024-06-14 12:58:13,865 INFO L175 Difference]: Start difference. First operand has 224 places, 308 transitions, 4290 flow. Second operand 9 states and 174 transitions. [2024-06-14 12:58:13,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 414 transitions, 6685 flow [2024-06-14 12:58:14,432 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 414 transitions, 6537 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:58:14,437 INFO L231 Difference]: Finished difference. Result has 231 places, 353 transitions, 5383 flow [2024-06-14 12:58:14,437 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5383, PETRI_PLACES=231, PETRI_TRANSITIONS=353} [2024-06-14 12:58:14,441 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 189 predicate places. [2024-06-14 12:58:14,441 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 353 transitions, 5383 flow [2024-06-14 12:58:14,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:14,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:14,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:14,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 12:58:14,442 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)] === [2024-06-14 12:58:14,442 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:14,442 INFO L85 PathProgramCache]: Analyzing trace with hash 2050242500, now seen corresponding path program 1 times [2024-06-14 12:58:14,442 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:14,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946780405] [2024-06-14 12:58:14,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:14,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:14,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:16,393 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:16,393 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946780405] [2024-06-14 12:58:16,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946780405] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:16,393 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:16,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:16,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717191188] [2024-06-14 12:58:16,394 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:16,394 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:16,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:16,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:16,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:16,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:16,466 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 353 transitions, 5383 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:16,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:16,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:16,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:17,824 INFO L124 PetriNetUnfolderBase]: 3610/5476 cut-off events. [2024-06-14 12:58:17,824 INFO L125 PetriNetUnfolderBase]: For 343710/343714 co-relation queries the response was YES. [2024-06-14 12:58:17,867 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46120 conditions, 5476 events. 3610/5476 cut-off events. For 343710/343714 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 29710 event pairs, 818 based on Foata normal form. 8/5483 useless extension candidates. Maximal degree in co-relation 46006. Up to 5184 conditions per place. [2024-06-14 12:58:17,889 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 333 selfloop transitions, 67 changer transitions 0/403 dead transitions. [2024-06-14 12:58:17,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 403 transitions, 6653 flow [2024-06-14 12:58:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:58:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:58:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-14 12:58:17,891 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4035476718403548 [2024-06-14 12:58:17,891 INFO L175 Difference]: Start difference. First operand has 231 places, 353 transitions, 5383 flow. Second operand 11 states and 182 transitions. [2024-06-14 12:58:17,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 403 transitions, 6653 flow [2024-06-14 12:58:18,648 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 403 transitions, 6563 flow, removed 34 selfloop flow, removed 2 redundant places. [2024-06-14 12:58:18,653 INFO L231 Difference]: Finished difference. Result has 241 places, 363 transitions, 5669 flow [2024-06-14 12:58:18,666 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5299, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=291, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5669, PETRI_PLACES=241, PETRI_TRANSITIONS=363} [2024-06-14 12:58:18,667 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 199 predicate places. [2024-06-14 12:58:18,667 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 363 transitions, 5669 flow [2024-06-14 12:58:18,667 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:18,667 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:18,668 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:18,668 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 12:58:18,668 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)] === [2024-06-14 12:58:18,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash 2050242190, now seen corresponding path program 2 times [2024-06-14 12:58:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:18,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1566549518] [2024-06-14 12:58:18,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:18,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:20,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:20,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1566549518] [2024-06-14 12:58:20,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1566549518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:20,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:20,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:20,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687371847] [2024-06-14 12:58:20,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:20,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:20,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:20,054 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:20,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:20,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 363 transitions, 5669 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:20,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:20,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:20,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:21,409 INFO L124 PetriNetUnfolderBase]: 3642/5524 cut-off events. [2024-06-14 12:58:21,409 INFO L125 PetriNetUnfolderBase]: For 359356/359360 co-relation queries the response was YES. [2024-06-14 12:58:21,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47316 conditions, 5524 events. 3642/5524 cut-off events. For 359356/359360 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30020 event pairs, 816 based on Foata normal form. 8/5531 useless extension candidates. Maximal degree in co-relation 47199. Up to 5238 conditions per place. [2024-06-14 12:58:21,482 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 340 selfloop transitions, 65 changer transitions 0/408 dead transitions. [2024-06-14 12:58:21,482 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 408 transitions, 6746 flow [2024-06-14 12:58:21,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:58:21,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:58:21,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:58:21,484 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-14 12:58:21,484 INFO L175 Difference]: Start difference. First operand has 241 places, 363 transitions, 5669 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:58:21,484 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 408 transitions, 6746 flow [2024-06-14 12:58:22,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 408 transitions, 6579 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 12:58:22,319 INFO L231 Difference]: Finished difference. Result has 246 places, 369 transitions, 5783 flow [2024-06-14 12:58:22,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5502, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=363, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5783, PETRI_PLACES=246, PETRI_TRANSITIONS=369} [2024-06-14 12:58:22,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 12:58:22,320 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 369 transitions, 5783 flow [2024-06-14 12:58:22,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:22,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:22,320 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:22,320 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 12:58:22,321 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)] === [2024-06-14 12:58:22,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:22,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2054315806, now seen corresponding path program 2 times [2024-06-14 12:58:22,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:22,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663891755] [2024-06-14 12:58:22,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:22,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:22,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:24,215 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:24,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:24,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663891755] [2024-06-14 12:58:24,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663891755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:24,216 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:24,216 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:24,216 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96440106] [2024-06-14 12:58:24,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:24,217 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:24,217 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:24,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:24,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:24,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:24,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 369 transitions, 5783 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:24,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:24,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:24,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:25,730 INFO L124 PetriNetUnfolderBase]: 3692/5594 cut-off events. [2024-06-14 12:58:25,731 INFO L125 PetriNetUnfolderBase]: For 371409/371413 co-relation queries the response was YES. [2024-06-14 12:58:25,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48197 conditions, 5594 events. 3692/5594 cut-off events. For 371409/371413 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 30439 event pairs, 807 based on Foata normal form. 8/5601 useless extension candidates. Maximal degree in co-relation 48078. Up to 5193 conditions per place. [2024-06-14 12:58:25,795 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 316 selfloop transitions, 99 changer transitions 0/418 dead transitions. [2024-06-14 12:58:25,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 418 transitions, 7034 flow [2024-06-14 12:58:25,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:25,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:25,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:58:25,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:58:25,796 INFO L175 Difference]: Start difference. First operand has 246 places, 369 transitions, 5783 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:58:25,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 418 transitions, 7034 flow [2024-06-14 12:58:26,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 418 transitions, 6829 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 12:58:26,488 INFO L231 Difference]: Finished difference. Result has 250 places, 384 transitions, 6135 flow [2024-06-14 12:58:26,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5586, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=369, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6135, PETRI_PLACES=250, PETRI_TRANSITIONS=384} [2024-06-14 12:58:26,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 12:58:26,489 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 384 transitions, 6135 flow [2024-06-14 12:58:26,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:26,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:26,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:26,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 12:58:26,490 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)] === [2024-06-14 12:58:26,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:26,490 INFO L85 PathProgramCache]: Analyzing trace with hash -2126634264, now seen corresponding path program 1 times [2024-06-14 12:58:26,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:26,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211035601] [2024-06-14 12:58:26,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:26,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:26,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:27,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:27,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:27,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211035601] [2024-06-14 12:58:27,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211035601] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:27,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:27,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:27,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29966657] [2024-06-14 12:58:27,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:27,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:27,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:27,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:27,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:27,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:27,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 384 transitions, 6135 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:27,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:27,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:27,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:28,726 INFO L124 PetriNetUnfolderBase]: 3786/5725 cut-off events. [2024-06-14 12:58:28,726 INFO L125 PetriNetUnfolderBase]: For 401156/401158 co-relation queries the response was YES. [2024-06-14 12:58:28,766 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50231 conditions, 5725 events. 3786/5725 cut-off events. For 401156/401158 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31197 event pairs, 744 based on Foata normal form. 6/5730 useless extension candidates. Maximal degree in co-relation 50109. Up to 4892 conditions per place. [2024-06-14 12:58:28,787 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 329 selfloop transitions, 123 changer transitions 0/455 dead transitions. [2024-06-14 12:58:28,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 257 places, 455 transitions, 8232 flow [2024-06-14 12:58:28,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:28,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:28,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:58:28,788 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 12:58:28,788 INFO L175 Difference]: Start difference. First operand has 250 places, 384 transitions, 6135 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:58:28,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 257 places, 455 transitions, 8232 flow [2024-06-14 12:58:29,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 455 transitions, 8065 flow, removed 39 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:29,708 INFO L231 Difference]: Finished difference. Result has 257 places, 419 transitions, 7058 flow [2024-06-14 12:58:29,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5975, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7058, PETRI_PLACES=257, PETRI_TRANSITIONS=419} [2024-06-14 12:58:29,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-14 12:58:29,709 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 419 transitions, 7058 flow [2024-06-14 12:58:29,709 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:29,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:29,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:29,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 12:58:29,710 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:29,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:29,710 INFO L85 PathProgramCache]: Analyzing trace with hash -1944437174, now seen corresponding path program 2 times [2024-06-14 12:58:29,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:29,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1590557436] [2024-06-14 12:58:29,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:29,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:29,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:30,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:30,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1590557436] [2024-06-14 12:58:30,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1590557436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:30,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:30,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:30,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258930549] [2024-06-14 12:58:30,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:30,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:30,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:30,669 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:30,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 419 transitions, 7058 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:30,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:30,670 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:30,670 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:32,129 INFO L124 PetriNetUnfolderBase]: 3969/5979 cut-off events. [2024-06-14 12:58:32,129 INFO L125 PetriNetUnfolderBase]: For 454759/454763 co-relation queries the response was YES. [2024-06-14 12:58:32,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54380 conditions, 5979 events. 3969/5979 cut-off events. For 454759/454763 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 32609 event pairs, 822 based on Foata normal form. 22/6000 useless extension candidates. Maximal degree in co-relation 54254. Up to 5645 conditions per place. [2024-06-14 12:58:32,201 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 407 selfloop transitions, 72 changer transitions 0/482 dead transitions. [2024-06-14 12:58:32,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 265 places, 482 transitions, 8962 flow [2024-06-14 12:58:32,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:58:32,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:58:32,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 12:58:32,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 12:58:32,202 INFO L175 Difference]: Start difference. First operand has 257 places, 419 transitions, 7058 flow. Second operand 9 states and 153 transitions. [2024-06-14 12:58:32,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 265 places, 482 transitions, 8962 flow [2024-06-14 12:58:33,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 482 transitions, 8714 flow, removed 113 selfloop flow, removed 2 redundant places. [2024-06-14 12:58:33,157 INFO L231 Difference]: Finished difference. Result has 265 places, 450 transitions, 7708 flow [2024-06-14 12:58:33,158 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6848, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=419, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7708, PETRI_PLACES=265, PETRI_TRANSITIONS=450} [2024-06-14 12:58:33,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 223 predicate places. [2024-06-14 12:58:33,158 INFO L495 AbstractCegarLoop]: Abstraction has has 265 places, 450 transitions, 7708 flow [2024-06-14 12:58:33,159 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:33,159 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:33,159 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:33,159 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 12:58:33,159 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)] === [2024-06-14 12:58:33,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:33,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1949382774, now seen corresponding path program 3 times [2024-06-14 12:58:33,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:33,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616413837] [2024-06-14 12:58:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:33,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:34,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:34,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:34,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616413837] [2024-06-14 12:58:34,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616413837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:34,200 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:34,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:34,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383490766] [2024-06-14 12:58:34,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:34,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:34,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:34,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:34,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:34,275 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:34,275 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 265 places, 450 transitions, 7708 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:34,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:34,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:34,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:35,900 INFO L124 PetriNetUnfolderBase]: 4235/6347 cut-off events. [2024-06-14 12:58:35,900 INFO L125 PetriNetUnfolderBase]: For 521989/521993 co-relation queries the response was YES. [2024-06-14 12:58:35,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60127 conditions, 6347 events. 4235/6347 cut-off events. For 521989/521993 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 34719 event pairs, 836 based on Foata normal form. 22/6368 useless extension candidates. Maximal degree in co-relation 59998. Up to 5483 conditions per place. [2024-06-14 12:58:35,985 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 365 selfloop transitions, 149 changer transitions 0/517 dead transitions. [2024-06-14 12:58:35,985 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 517 transitions, 9961 flow [2024-06-14 12:58:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:58:35,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:58:35,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 171 transitions. [2024-06-14 12:58:35,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4170731707317073 [2024-06-14 12:58:35,986 INFO L175 Difference]: Start difference. First operand has 265 places, 450 transitions, 7708 flow. Second operand 10 states and 171 transitions. [2024-06-14 12:58:35,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 517 transitions, 9961 flow [2024-06-14 12:58:37,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 517 transitions, 9606 flow, removed 146 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:37,076 INFO L231 Difference]: Finished difference. Result has 273 places, 477 transitions, 8419 flow [2024-06-14 12:58:37,076 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7353, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=307, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8419, PETRI_PLACES=273, PETRI_TRANSITIONS=477} [2024-06-14 12:58:37,076 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 231 predicate places. [2024-06-14 12:58:37,076 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 477 transitions, 8419 flow [2024-06-14 12:58:37,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:37,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:37,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:37,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 12:58:37,081 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)] === [2024-06-14 12:58:37,081 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1949136510, now seen corresponding path program 1 times [2024-06-14 12:58:37,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:37,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176187252] [2024-06-14 12:58:37,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:37,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:37,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:38,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:38,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:38,839 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176187252] [2024-06-14 12:58:38,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176187252] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:38,839 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:38,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:38,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815570619] [2024-06-14 12:58:38,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:38,840 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:38,840 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:38,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:38,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:38,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:38,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 477 transitions, 8419 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:38,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:38,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:38,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:40,438 INFO L124 PetriNetUnfolderBase]: 4243/6358 cut-off events. [2024-06-14 12:58:40,438 INFO L125 PetriNetUnfolderBase]: For 515736/515736 co-relation queries the response was YES. [2024-06-14 12:58:40,503 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61274 conditions, 6358 events. 4243/6358 cut-off events. For 515736/515736 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34836 event pairs, 922 based on Foata normal form. 2/6359 useless extension candidates. Maximal degree in co-relation 61141. Up to 6315 conditions per place. [2024-06-14 12:58:40,535 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 480 selfloop transitions, 16 changer transitions 0/499 dead transitions. [2024-06-14 12:58:40,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 280 places, 499 transitions, 9543 flow [2024-06-14 12:58:40,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:40,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:40,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-14 12:58:40,537 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3567073170731707 [2024-06-14 12:58:40,537 INFO L175 Difference]: Start difference. First operand has 273 places, 477 transitions, 8419 flow. Second operand 8 states and 117 transitions. [2024-06-14 12:58:40,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 280 places, 499 transitions, 9543 flow [2024-06-14 12:58:41,892 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 276 places, 499 transitions, 9068 flow, removed 201 selfloop flow, removed 4 redundant places. [2024-06-14 12:58:41,899 INFO L231 Difference]: Finished difference. Result has 278 places, 480 transitions, 8075 flow [2024-06-14 12:58:41,899 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7944, PETRI_DIFFERENCE_MINUEND_PLACES=269, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8075, PETRI_PLACES=278, PETRI_TRANSITIONS=480} [2024-06-14 12:58:41,900 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 236 predicate places. [2024-06-14 12:58:41,900 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 480 transitions, 8075 flow [2024-06-14 12:58:41,900 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:41,900 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:41,900 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:41,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 12:58:41,901 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)] === [2024-06-14 12:58:41,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:41,901 INFO L85 PathProgramCache]: Analyzing trace with hash -1949505596, now seen corresponding path program 3 times [2024-06-14 12:58:41,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:41,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705979643] [2024-06-14 12:58:41,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:41,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:41,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:43,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:43,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:43,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705979643] [2024-06-14 12:58:43,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705979643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:43,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:43,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:58:43,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012859601] [2024-06-14 12:58:43,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:43,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:58:43,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:43,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:58:43,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:58:43,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:43,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 480 transitions, 8075 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:43,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:43,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:43,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:45,300 INFO L124 PetriNetUnfolderBase]: 4251/6371 cut-off events. [2024-06-14 12:58:45,300 INFO L125 PetriNetUnfolderBase]: For 515587/515591 co-relation queries the response was YES. [2024-06-14 12:58:45,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59682 conditions, 6371 events. 4251/6371 cut-off events. For 515587/515591 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 34962 event pairs, 848 based on Foata normal form. 8/6378 useless extension candidates. Maximal degree in co-relation 59547. Up to 6099 conditions per place. [2024-06-14 12:58:45,378 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 442 selfloop transitions, 65 changer transitions 0/510 dead transitions. [2024-06-14 12:58:45,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 510 transitions, 9288 flow [2024-06-14 12:58:45,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:58:45,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:58:45,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 155 transitions. [2024-06-14 12:58:45,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 12:58:45,379 INFO L175 Difference]: Start difference. First operand has 278 places, 480 transitions, 8075 flow. Second operand 10 states and 155 transitions. [2024-06-14 12:58:45,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 510 transitions, 9288 flow [2024-06-14 12:58:46,654 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 510 transitions, 9020 flow, removed 69 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:46,661 INFO L231 Difference]: Finished difference. Result has 281 places, 485 transitions, 8068 flow [2024-06-14 12:58:46,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7807, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=480, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8068, PETRI_PLACES=281, PETRI_TRANSITIONS=485} [2024-06-14 12:58:46,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 12:58:46,662 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 485 transitions, 8068 flow [2024-06-14 12:58:46,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:58:46,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:46,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:46,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 12:58:46,663 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)] === [2024-06-14 12:58:46,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:46,663 INFO L85 PathProgramCache]: Analyzing trace with hash 918137524, now seen corresponding path program 4 times [2024-06-14 12:58:46,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:46,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332268963] [2024-06-14 12:58:46,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:46,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:46,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:47,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:47,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332268963] [2024-06-14 12:58:47,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1332268963] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:47,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:47,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:47,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828352643] [2024-06-14 12:58:47,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:47,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:47,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:47,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:47,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:47,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:47,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 485 transitions, 8068 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:47,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:47,662 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:47,662 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:49,292 INFO L124 PetriNetUnfolderBase]: 4277/6406 cut-off events. [2024-06-14 12:58:49,293 INFO L125 PetriNetUnfolderBase]: For 531730/531730 co-relation queries the response was YES. [2024-06-14 12:58:49,352 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60113 conditions, 6406 events. 4277/6406 cut-off events. For 531730/531730 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 35144 event pairs, 912 based on Foata normal form. 2/6407 useless extension candidates. Maximal degree in co-relation 59978. Up to 6300 conditions per place. [2024-06-14 12:58:49,381 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 475 selfloop transitions, 42 changer transitions 0/520 dead transitions. [2024-06-14 12:58:49,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 520 transitions, 9510 flow [2024-06-14 12:58:49,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:49,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:49,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 12:58:49,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 12:58:49,383 INFO L175 Difference]: Start difference. First operand has 281 places, 485 transitions, 8068 flow. Second operand 8 states and 128 transitions. [2024-06-14 12:58:49,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 520 transitions, 9510 flow [2024-06-14 12:58:50,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 520 transitions, 9226 flow, removed 50 selfloop flow, removed 8 redundant places. [2024-06-14 12:58:50,536 INFO L231 Difference]: Finished difference. Result has 283 places, 496 transitions, 8126 flow [2024-06-14 12:58:50,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7784, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8126, PETRI_PLACES=283, PETRI_TRANSITIONS=496} [2024-06-14 12:58:50,537 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 12:58:50,537 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 496 transitions, 8126 flow [2024-06-14 12:58:50,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:50,537 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:50,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:50,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 12:58:50,538 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)] === [2024-06-14 12:58:50,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:50,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1014438022, now seen corresponding path program 5 times [2024-06-14 12:58:50,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:50,538 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549327587] [2024-06-14 12:58:50,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:50,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:50,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:51,423 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:51,424 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:51,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549327587] [2024-06-14 12:58:51,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549327587] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:51,424 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:51,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:51,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146258027] [2024-06-14 12:58:51,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:51,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:51,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:51,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:51,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:51,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:51,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 496 transitions, 8126 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:51,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:51,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:51,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:53,038 INFO L124 PetriNetUnfolderBase]: 4287/6420 cut-off events. [2024-06-14 12:58:53,039 INFO L125 PetriNetUnfolderBase]: For 544521/544521 co-relation queries the response was YES. [2024-06-14 12:58:53,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60414 conditions, 6420 events. 4287/6420 cut-off events. For 544521/544521 co-relation queries the response was YES. Maximal size of possible extension queue 358. Compared 35254 event pairs, 930 based on Foata normal form. 2/6421 useless extension candidates. Maximal degree in co-relation 60279. Up to 6345 conditions per place. [2024-06-14 12:58:53,123 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 478 selfloop transitions, 39 changer transitions 0/520 dead transitions. [2024-06-14 12:58:53,124 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 520 transitions, 9321 flow [2024-06-14 12:58:53,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:53,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:53,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:58:53,125 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:58:53,125 INFO L175 Difference]: Start difference. First operand has 283 places, 496 transitions, 8126 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:58:53,125 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 520 transitions, 9321 flow [2024-06-14 12:58:54,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 520 transitions, 9208 flow, removed 37 selfloop flow, removed 3 redundant places. [2024-06-14 12:58:54,089 INFO L231 Difference]: Finished difference. Result has 289 places, 502 transitions, 8224 flow [2024-06-14 12:58:54,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8019, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8224, PETRI_PLACES=289, PETRI_TRANSITIONS=502} [2024-06-14 12:58:54,090 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-14 12:58:54,090 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 502 transitions, 8224 flow [2024-06-14 12:58:54,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:54,090 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:54,090 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:54,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 12:58:54,091 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:54,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:54,091 INFO L85 PathProgramCache]: Analyzing trace with hash 775109032, now seen corresponding path program 6 times [2024-06-14 12:58:54,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:54,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847128755] [2024-06-14 12:58:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:54,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:54,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:55,002 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:55,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:55,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847128755] [2024-06-14 12:58:55,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847128755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:55,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:55,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:55,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666266591] [2024-06-14 12:58:55,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:55,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:55,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:55,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:55,020 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:55,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:55,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 502 transitions, 8224 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:55,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:55,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:55,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:58:56,623 INFO L124 PetriNetUnfolderBase]: 4297/6434 cut-off events. [2024-06-14 12:58:56,623 INFO L125 PetriNetUnfolderBase]: For 560518/560518 co-relation queries the response was YES. [2024-06-14 12:58:56,686 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60766 conditions, 6434 events. 4297/6434 cut-off events. For 560518/560518 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35325 event pairs, 917 based on Foata normal form. 2/6435 useless extension candidates. Maximal degree in co-relation 60629. Up to 6237 conditions per place. [2024-06-14 12:58:56,717 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 467 selfloop transitions, 68 changer transitions 0/538 dead transitions. [2024-06-14 12:58:56,718 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 538 transitions, 9930 flow [2024-06-14 12:58:56,718 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:58:56,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:58:56,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 12:58:56,719 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 12:58:56,719 INFO L175 Difference]: Start difference. First operand has 289 places, 502 transitions, 8224 flow. Second operand 8 states and 131 transitions. [2024-06-14 12:58:56,719 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 538 transitions, 9930 flow [2024-06-14 12:58:57,838 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 538 transitions, 9794 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 12:58:57,846 INFO L231 Difference]: Finished difference. Result has 293 places, 513 transitions, 8580 flow [2024-06-14 12:58:57,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8088, PETRI_DIFFERENCE_MINUEND_PLACES=284, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8580, PETRI_PLACES=293, PETRI_TRANSITIONS=513} [2024-06-14 12:58:57,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-14 12:58:57,846 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 513 transitions, 8580 flow [2024-06-14 12:58:57,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:57,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:58:57,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:58:57,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 12:58:57,847 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:58:57,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:58:57,847 INFO L85 PathProgramCache]: Analyzing trace with hash 775229002, now seen corresponding path program 7 times [2024-06-14 12:58:57,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:58:57,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377698643] [2024-06-14 12:58:57,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:58:57,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:58:57,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:58:58,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:58:58,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:58:58,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377698643] [2024-06-14 12:58:58,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377698643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:58:58,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:58:58,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:58:58,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26241122] [2024-06-14 12:58:58,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:58:58,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:58:58,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:58:58,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:58:58,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:58:58,839 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:58:58,840 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 513 transitions, 8580 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:58:58,840 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:58:58,840 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:58:58,840 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:00,309 INFO L124 PetriNetUnfolderBase]: 4279/6410 cut-off events. [2024-06-14 12:59:00,310 INFO L125 PetriNetUnfolderBase]: For 570836/570836 co-relation queries the response was YES. [2024-06-14 12:59:00,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60510 conditions, 6410 events. 4279/6410 cut-off events. For 570836/570836 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 35175 event pairs, 915 based on Foata normal form. 6/6415 useless extension candidates. Maximal degree in co-relation 60371. Up to 6348 conditions per place. [2024-06-14 12:59:00,401 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 512 selfloop transitions, 22 changer transitions 0/537 dead transitions. [2024-06-14 12:59:00,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 537 transitions, 9825 flow [2024-06-14 12:59:00,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:00,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:00,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 12:59:00,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 12:59:00,402 INFO L175 Difference]: Start difference. First operand has 293 places, 513 transitions, 8580 flow. Second operand 8 states and 121 transitions. [2024-06-14 12:59:00,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 537 transitions, 9825 flow [2024-06-14 12:59:01,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 537 transitions, 9652 flow, removed 49 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:01,497 INFO L231 Difference]: Finished difference. Result has 296 places, 516 transitions, 8559 flow [2024-06-14 12:59:01,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8411, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8559, PETRI_PLACES=296, PETRI_TRANSITIONS=516} [2024-06-14 12:59:01,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 12:59:01,498 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 516 transitions, 8559 flow [2024-06-14 12:59:01,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:01,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:01,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:01,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 12:59:01,498 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:01,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:01,498 INFO L85 PathProgramCache]: Analyzing trace with hash 483144148, now seen corresponding path program 8 times [2024-06-14 12:59:01,499 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:01,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852426991] [2024-06-14 12:59:01,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:01,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:01,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:02,261 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:02,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:02,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852426991] [2024-06-14 12:59:02,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852426991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:02,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:02,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:02,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041542658] [2024-06-14 12:59:02,262 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:02,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:02,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:02,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:02,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:02,329 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:02,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 516 transitions, 8559 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:02,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:02,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:02,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:03,850 INFO L124 PetriNetUnfolderBase]: 4314/6459 cut-off events. [2024-06-14 12:59:03,850 INFO L125 PetriNetUnfolderBase]: For 589068/589068 co-relation queries the response was YES. [2024-06-14 12:59:03,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61057 conditions, 6459 events. 4314/6459 cut-off events. For 589068/589068 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 35509 event pairs, 924 based on Foata normal form. 6/6464 useless extension candidates. Maximal degree in co-relation 60918. Up to 6359 conditions per place. [2024-06-14 12:59:03,945 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 500 selfloop transitions, 46 changer transitions 0/549 dead transitions. [2024-06-14 12:59:03,945 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 549 transitions, 9921 flow [2024-06-14 12:59:03,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:03,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:03,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 12:59:03,946 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-14 12:59:03,946 INFO L175 Difference]: Start difference. First operand has 296 places, 516 transitions, 8559 flow. Second operand 9 states and 140 transitions. [2024-06-14 12:59:03,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 549 transitions, 9921 flow [2024-06-14 12:59:05,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 549 transitions, 9689 flow, removed 59 selfloop flow, removed 8 redundant places. [2024-06-14 12:59:05,202 INFO L231 Difference]: Finished difference. Result has 298 places, 527 transitions, 8650 flow [2024-06-14 12:59:05,203 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8327, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8650, PETRI_PLACES=298, PETRI_TRANSITIONS=527} [2024-06-14 12:59:05,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 256 predicate places. [2024-06-14 12:59:05,203 INFO L495 AbstractCegarLoop]: Abstraction has has 298 places, 527 transitions, 8650 flow [2024-06-14 12:59:05,203 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:05,203 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:05,203 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:05,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 12:59:05,204 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:05,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:05,204 INFO L85 PathProgramCache]: Analyzing trace with hash 1129492042, now seen corresponding path program 9 times [2024-06-14 12:59:05,204 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:05,204 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287285892] [2024-06-14 12:59:05,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:05,204 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:05,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:06,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:06,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287285892] [2024-06-14 12:59:06,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287285892] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:06,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:06,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:06,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501194883] [2024-06-14 12:59:06,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:06,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:06,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:06,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:06,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:06,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 298 places, 527 transitions, 8650 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:06,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:06,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:06,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:07,851 INFO L124 PetriNetUnfolderBase]: 4376/6545 cut-off events. [2024-06-14 12:59:07,852 INFO L125 PetriNetUnfolderBase]: For 615130/615130 co-relation queries the response was YES. [2024-06-14 12:59:07,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62983 conditions, 6545 events. 4376/6545 cut-off events. For 615130/615130 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 36048 event pairs, 916 based on Foata normal form. 6/6550 useless extension candidates. Maximal degree in co-relation 62842. Up to 6387 conditions per place. [2024-06-14 12:59:07,948 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 499 selfloop transitions, 63 changer transitions 0/565 dead transitions. [2024-06-14 12:59:07,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 565 transitions, 10354 flow [2024-06-14 12:59:07,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:07,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:07,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 12:59:07,950 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 12:59:07,950 INFO L175 Difference]: Start difference. First operand has 298 places, 527 transitions, 8650 flow. Second operand 9 states and 143 transitions. [2024-06-14 12:59:07,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 565 transitions, 10354 flow [2024-06-14 12:59:09,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 300 places, 565 transitions, 10180 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:59:09,425 INFO L231 Difference]: Finished difference. Result has 302 places, 540 transitions, 9003 flow [2024-06-14 12:59:09,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8476, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=527, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9003, PETRI_PLACES=302, PETRI_TRANSITIONS=540} [2024-06-14 12:59:09,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 12:59:09,426 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 540 transitions, 9003 flow [2024-06-14 12:59:09,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:09,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:09,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:09,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 12:59:09,427 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:09,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:09,427 INFO L85 PathProgramCache]: Analyzing trace with hash -1500482904, now seen corresponding path program 10 times [2024-06-14 12:59:09,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:09,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1895515782] [2024-06-14 12:59:09,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:09,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:09,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:10,256 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:10,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:10,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1895515782] [2024-06-14 12:59:10,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1895515782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:10,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:10,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:10,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270191825] [2024-06-14 12:59:10,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:10,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:10,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:10,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:10,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:10,324 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:10,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 540 transitions, 9003 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:10,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:10,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:10,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:12,091 INFO L124 PetriNetUnfolderBase]: 4422/6609 cut-off events. [2024-06-14 12:59:12,091 INFO L125 PetriNetUnfolderBase]: For 638362/638362 co-relation queries the response was YES. [2024-06-14 12:59:12,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64034 conditions, 6609 events. 4422/6609 cut-off events. For 638362/638362 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 36408 event pairs, 915 based on Foata normal form. 6/6614 useless extension candidates. Maximal degree in co-relation 63891. Up to 6280 conditions per place. [2024-06-14 12:59:12,191 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 465 selfloop transitions, 110 changer transitions 0/578 dead transitions. [2024-06-14 12:59:12,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 578 transitions, 10591 flow [2024-06-14 12:59:12,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:12,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:12,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:59:12,193 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 12:59:12,193 INFO L175 Difference]: Start difference. First operand has 302 places, 540 transitions, 9003 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:59:12,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 578 transitions, 10591 flow [2024-06-14 12:59:13,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 578 transitions, 10412 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:13,773 INFO L231 Difference]: Finished difference. Result has 307 places, 547 transitions, 9330 flow [2024-06-14 12:59:13,774 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8824, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9330, PETRI_PLACES=307, PETRI_TRANSITIONS=547} [2024-06-14 12:59:13,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 12:59:13,774 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 547 transitions, 9330 flow [2024-06-14 12:59:13,774 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:13,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:13,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:13,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 12:59:13,775 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:59:13,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:13,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1080540358, now seen corresponding path program 11 times [2024-06-14 12:59:13,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:13,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [852490470] [2024-06-14 12:59:13,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:13,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:13,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:14,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:14,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:14,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [852490470] [2024-06-14 12:59:14,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [852490470] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:14,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:14,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:14,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1122320226] [2024-06-14 12:59:14,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:14,555 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:14,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:14,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:14,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:14,600 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:14,601 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 547 transitions, 9330 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:14,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:14,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:14,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:16,424 INFO L124 PetriNetUnfolderBase]: 4433/6625 cut-off events. [2024-06-14 12:59:16,424 INFO L125 PetriNetUnfolderBase]: For 648476/648476 co-relation queries the response was YES. [2024-06-14 12:59:16,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64578 conditions, 6625 events. 4433/6625 cut-off events. For 648476/648476 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36566 event pairs, 923 based on Foata normal form. 6/6630 useless extension candidates. Maximal degree in co-relation 64432. Up to 6442 conditions per place. [2024-06-14 12:59:16,515 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 506 selfloop transitions, 73 changer transitions 0/582 dead transitions. [2024-06-14 12:59:16,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 314 places, 582 transitions, 10711 flow [2024-06-14 12:59:16,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:16,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:16,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 12:59:16,517 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 12:59:16,517 INFO L175 Difference]: Start difference. First operand has 307 places, 547 transitions, 9330 flow. Second operand 8 states and 139 transitions. [2024-06-14 12:59:16,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 314 places, 582 transitions, 10711 flow [2024-06-14 12:59:18,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 309 places, 582 transitions, 10549 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:18,192 INFO L231 Difference]: Finished difference. Result has 311 places, 554 transitions, 9501 flow [2024-06-14 12:59:18,193 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9170, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=547, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9501, PETRI_PLACES=311, PETRI_TRANSITIONS=554} [2024-06-14 12:59:18,193 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 12:59:18,193 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 554 transitions, 9501 flow [2024-06-14 12:59:18,193 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:18,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:18,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:18,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 12:59:18,194 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)] === [2024-06-14 12:59:18,194 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:18,194 INFO L85 PathProgramCache]: Analyzing trace with hash 903171688, now seen corresponding path program 12 times [2024-06-14 12:59:18,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:18,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117571505] [2024-06-14 12:59:18,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:18,195 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:18,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:19,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:19,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117571505] [2024-06-14 12:59:19,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117571505] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:19,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:19,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:59:19,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963192546] [2024-06-14 12:59:19,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:19,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:59:19,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:19,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:59:19,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:59:19,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:19,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 554 transitions, 9501 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:19,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:19,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:19,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:20,937 INFO L124 PetriNetUnfolderBase]: 4577/6829 cut-off events. [2024-06-14 12:59:20,938 INFO L125 PetriNetUnfolderBase]: For 670221/670223 co-relation queries the response was YES. [2024-06-14 12:59:21,001 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67294 conditions, 6829 events. 4577/6829 cut-off events. For 670221/670223 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 37749 event pairs, 780 based on Foata normal form. 20/6848 useless extension candidates. Maximal degree in co-relation 67146. Up to 5678 conditions per place. [2024-06-14 12:59:21,032 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 421 selfloop transitions, 192 changer transitions 0/616 dead transitions. [2024-06-14 12:59:21,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 318 places, 616 transitions, 11718 flow [2024-06-14 12:59:21,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:59:21,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:59:21,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:59:21,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-14 12:59:21,033 INFO L175 Difference]: Start difference. First operand has 311 places, 554 transitions, 9501 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:59:21,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 318 places, 616 transitions, 11718 flow [2024-06-14 12:59:22,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 616 transitions, 11528 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 12:59:22,872 INFO L231 Difference]: Finished difference. Result has 316 places, 579 transitions, 10507 flow [2024-06-14 12:59:22,873 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9335, PETRI_DIFFERENCE_MINUEND_PLACES=306, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10507, PETRI_PLACES=316, PETRI_TRANSITIONS=579} [2024-06-14 12:59:22,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 274 predicate places. [2024-06-14 12:59:22,873 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 579 transitions, 10507 flow [2024-06-14 12:59:22,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 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) [2024-06-14 12:59:22,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:22,874 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:22,874 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 12:59:22,874 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)] === [2024-06-14 12:59:22,874 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:22,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1302915262, now seen corresponding path program 2 times [2024-06-14 12:59:22,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:22,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1731728936] [2024-06-14 12:59:22,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:22,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:22,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:24,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:24,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:24,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1731728936] [2024-06-14 12:59:24,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1731728936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:24,334 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:24,334 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:24,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [293574413] [2024-06-14 12:59:24,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:24,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:24,335 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:24,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:24,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:24,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:24,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 579 transitions, 10507 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:24,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:24,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:24,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:26,117 INFO L124 PetriNetUnfolderBase]: 4585/6840 cut-off events. [2024-06-14 12:59:26,117 INFO L125 PetriNetUnfolderBase]: For 653068/653068 co-relation queries the response was YES. [2024-06-14 12:59:26,197 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68403 conditions, 6840 events. 4585/6840 cut-off events. For 653068/653068 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37732 event pairs, 926 based on Foata normal form. 2/6841 useless extension candidates. Maximal degree in co-relation 68252. Up to 6760 conditions per place. [2024-06-14 12:59:26,232 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 564 selfloop transitions, 32 changer transitions 0/599 dead transitions. [2024-06-14 12:59:26,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 599 transitions, 11817 flow [2024-06-14 12:59:26,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:59:26,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:59:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 12:59:26,233 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 12:59:26,233 INFO L175 Difference]: Start difference. First operand has 316 places, 579 transitions, 10507 flow. Second operand 6 states and 100 transitions. [2024-06-14 12:59:26,233 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 599 transitions, 11817 flow [2024-06-14 12:59:27,980 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 317 places, 599 transitions, 11409 flow, removed 136 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:28,152 INFO L231 Difference]: Finished difference. Result has 318 places, 581 transitions, 10243 flow [2024-06-14 12:59:28,153 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10099, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10243, PETRI_PLACES=318, PETRI_TRANSITIONS=581} [2024-06-14 12:59:28,153 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 276 predicate places. [2024-06-14 12:59:28,153 INFO L495 AbstractCegarLoop]: Abstraction has has 318 places, 581 transitions, 10243 flow [2024-06-14 12:59:28,154 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:28,154 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:28,154 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:28,154 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 12:59:28,154 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)] === [2024-06-14 12:59:28,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:28,155 INFO L85 PathProgramCache]: Analyzing trace with hash 1317200062, now seen corresponding path program 3 times [2024-06-14 12:59:28,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:28,155 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817264275] [2024-06-14 12:59:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:28,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:28,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:29,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:29,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:29,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817264275] [2024-06-14 12:59:29,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817264275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:29,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:29,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:29,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527336404] [2024-06-14 12:59:29,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:29,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:29,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:29,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:29,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:29,447 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:29,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 318 places, 581 transitions, 10243 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:29,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:29,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:29,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:31,259 INFO L124 PetriNetUnfolderBase]: 4580/6833 cut-off events. [2024-06-14 12:59:31,259 INFO L125 PetriNetUnfolderBase]: For 660281/660281 co-relation queries the response was YES. [2024-06-14 12:59:31,325 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67279 conditions, 6833 events. 4580/6833 cut-off events. For 660281/660281 co-relation queries the response was YES. Maximal size of possible extension queue 384. Compared 37700 event pairs, 943 based on Foata normal form. 2/6834 useless extension candidates. Maximal degree in co-relation 67127. Up to 6797 conditions per place. [2024-06-14 12:59:31,355 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 578 selfloop transitions, 14 changer transitions 0/595 dead transitions. [2024-06-14 12:59:31,356 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 595 transitions, 11529 flow [2024-06-14 12:59:31,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:59:31,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:59:31,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-14 12:59:31,357 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-14 12:59:31,357 INFO L175 Difference]: Start difference. First operand has 318 places, 581 transitions, 10243 flow. Second operand 6 states and 91 transitions. [2024-06-14 12:59:31,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 595 transitions, 11529 flow [2024-06-14 12:59:32,963 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 595 transitions, 11427 flow, removed 34 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:32,972 INFO L231 Difference]: Finished difference. Result has 321 places, 583 transitions, 10248 flow [2024-06-14 12:59:32,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10145, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=581, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=10248, PETRI_PLACES=321, PETRI_TRANSITIONS=583} [2024-06-14 12:59:32,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 12:59:32,973 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 583 transitions, 10248 flow [2024-06-14 12:59:32,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:32,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:32,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:32,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 12:59:32,973 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)] === [2024-06-14 12:59:32,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:32,974 INFO L85 PathProgramCache]: Analyzing trace with hash 903405056, now seen corresponding path program 4 times [2024-06-14 12:59:32,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:32,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507802380] [2024-06-14 12:59:32,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:32,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:32,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:34,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:34,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:34,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507802380] [2024-06-14 12:59:34,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [507802380] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:34,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:34,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:34,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10848437] [2024-06-14 12:59:34,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:34,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:34,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:34,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:34,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:34,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:34,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 583 transitions, 10248 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:34,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:34,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:36,695 INFO L124 PetriNetUnfolderBase]: 4824/7174 cut-off events. [2024-06-14 12:59:36,695 INFO L125 PetriNetUnfolderBase]: For 729603/729605 co-relation queries the response was YES. [2024-06-14 12:59:36,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71910 conditions, 7174 events. 4824/7174 cut-off events. For 729603/729605 co-relation queries the response was YES. Maximal size of possible extension queue 397. Compared 39593 event pairs, 834 based on Foata normal form. 14/7187 useless extension candidates. Maximal degree in co-relation 71757. Up to 6384 conditions per place. [2024-06-14 12:59:36,807 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 498 selfloop transitions, 150 changer transitions 0/651 dead transitions. [2024-06-14 12:59:36,807 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 651 transitions, 12985 flow [2024-06-14 12:59:36,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:59:36,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:59:36,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 12:59:36,808 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:59:36,808 INFO L175 Difference]: Start difference. First operand has 321 places, 583 transitions, 10248 flow. Second operand 10 states and 164 transitions. [2024-06-14 12:59:36,808 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 651 transitions, 12985 flow [2024-06-14 12:59:38,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 326 places, 651 transitions, 12898 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:59:38,337 INFO L231 Difference]: Finished difference. Result has 330 places, 620 transitions, 11537 flow [2024-06-14 12:59:38,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10161, PETRI_DIFFERENCE_MINUEND_PLACES=317, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11537, PETRI_PLACES=330, PETRI_TRANSITIONS=620} [2024-06-14 12:59:38,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 288 predicate places. [2024-06-14 12:59:38,338 INFO L495 AbstractCegarLoop]: Abstraction has has 330 places, 620 transitions, 11537 flow [2024-06-14 12:59:38,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:38,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:38,338 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:38,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 12:59:38,339 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)] === [2024-06-14 12:59:38,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:38,339 INFO L85 PathProgramCache]: Analyzing trace with hash 903048866, now seen corresponding path program 5 times [2024-06-14 12:59:38,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:38,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853511273] [2024-06-14 12:59:38,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:38,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:38,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:39,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:39,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:39,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853511273] [2024-06-14 12:59:39,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [853511273] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:39,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:39,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:39,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327646737] [2024-06-14 12:59:39,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:39,589 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:39,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:39,590 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:39,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:39,641 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:39,641 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 330 places, 620 transitions, 11537 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:39,642 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:39,642 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:39,642 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:41,894 INFO L124 PetriNetUnfolderBase]: 5048/7484 cut-off events. [2024-06-14 12:59:41,895 INFO L125 PetriNetUnfolderBase]: For 825409/825411 co-relation queries the response was YES. [2024-06-14 12:59:41,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79229 conditions, 7484 events. 5048/7484 cut-off events. For 825409/825411 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41536 event pairs, 871 based on Foata normal form. 10/7493 useless extension candidates. Maximal degree in co-relation 79072. Up to 6061 conditions per place. [2024-06-14 12:59:42,021 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 460 selfloop transitions, 225 changer transitions 0/688 dead transitions. [2024-06-14 12:59:42,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 688 transitions, 14266 flow [2024-06-14 12:59:42,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:42,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:42,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 176 transitions. [2024-06-14 12:59:42,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47696476964769646 [2024-06-14 12:59:42,023 INFO L175 Difference]: Start difference. First operand has 330 places, 620 transitions, 11537 flow. Second operand 9 states and 176 transitions. [2024-06-14 12:59:42,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 688 transitions, 14266 flow [2024-06-14 12:59:44,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 688 transitions, 13638 flow, removed 268 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:44,406 INFO L231 Difference]: Finished difference. Result has 338 places, 642 transitions, 12370 flow [2024-06-14 12:59:44,407 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10989, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12370, PETRI_PLACES=338, PETRI_TRANSITIONS=642} [2024-06-14 12:59:44,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 296 predicate places. [2024-06-14 12:59:44,407 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 642 transitions, 12370 flow [2024-06-14 12:59:44,408 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:44,408 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:44,408 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:44,408 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 12:59:44,408 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)] === [2024-06-14 12:59:44,409 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:44,409 INFO L85 PathProgramCache]: Analyzing trace with hash 903059096, now seen corresponding path program 6 times [2024-06-14 12:59:44,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:44,409 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456032009] [2024-06-14 12:59:44,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:44,409 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:44,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:45,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:45,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:45,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456032009] [2024-06-14 12:59:45,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456032009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:45,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:45,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:45,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234610141] [2024-06-14 12:59:45,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:45,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:45,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:45,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:45,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:46,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:46,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 642 transitions, 12370 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:46,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:46,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:46,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:48,290 INFO L124 PetriNetUnfolderBase]: 5092/7548 cut-off events. [2024-06-14 12:59:48,291 INFO L125 PetriNetUnfolderBase]: For 845849/845851 co-relation queries the response was YES. [2024-06-14 12:59:48,366 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80341 conditions, 7548 events. 5092/7548 cut-off events. For 845849/845851 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 41816 event pairs, 904 based on Foata normal form. 14/7561 useless extension candidates. Maximal degree in co-relation 80181. Up to 6942 conditions per place. [2024-06-14 12:59:48,402 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 519 selfloop transitions, 159 changer transitions 0/681 dead transitions. [2024-06-14 12:59:48,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 681 transitions, 14303 flow [2024-06-14 12:59:48,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:48,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:48,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 12:59:48,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 12:59:48,403 INFO L175 Difference]: Start difference. First operand has 338 places, 642 transitions, 12370 flow. Second operand 9 states and 156 transitions. [2024-06-14 12:59:48,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 681 transitions, 14303 flow [2024-06-14 12:59:51,199 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 681 transitions, 14021 flow, removed 112 selfloop flow, removed 3 redundant places. [2024-06-14 12:59:51,208 INFO L231 Difference]: Finished difference. Result has 344 places, 648 transitions, 12620 flow [2024-06-14 12:59:51,209 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12110, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=153, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=483, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12620, PETRI_PLACES=344, PETRI_TRANSITIONS=648} [2024-06-14 12:59:51,209 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 302 predicate places. [2024-06-14 12:59:51,209 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 648 transitions, 12620 flow [2024-06-14 12:59:51,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:51,209 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:51,209 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:51,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 12:59:51,210 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)] === [2024-06-14 12:59:51,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:51,210 INFO L85 PathProgramCache]: Analyzing trace with hash 813896974, now seen corresponding path program 3 times [2024-06-14 12:59:51,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:51,210 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392248778] [2024-06-14 12:59:51,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:51,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:51,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:52,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:52,342 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:52,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392248778] [2024-06-14 12:59:52,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392248778] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:52,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:52,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:52,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900466193] [2024-06-14 12:59:52,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:52,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:52,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:52,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:52,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:52,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:52,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 648 transitions, 12620 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:52,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:52,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:52,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:59:54,739 INFO L124 PetriNetUnfolderBase]: 5401/8063 cut-off events. [2024-06-14 12:59:54,739 INFO L125 PetriNetUnfolderBase]: For 1046880/1046882 co-relation queries the response was YES. [2024-06-14 12:59:54,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84237 conditions, 8063 events. 5401/8063 cut-off events. For 1046880/1046882 co-relation queries the response was YES. Maximal size of possible extension queue 412. Compared 45207 event pairs, 876 based on Foata normal form. 80/8142 useless extension candidates. Maximal degree in co-relation 84075. Up to 6441 conditions per place. [2024-06-14 12:59:54,871 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 504 selfloop transitions, 198 changer transitions 0/705 dead transitions. [2024-06-14 12:59:54,872 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 705 transitions, 14667 flow [2024-06-14 12:59:54,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:59:54,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:59:54,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 183 transitions. [2024-06-14 12:59:54,873 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 12:59:54,873 INFO L175 Difference]: Start difference. First operand has 344 places, 648 transitions, 12620 flow. Second operand 9 states and 183 transitions. [2024-06-14 12:59:54,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 705 transitions, 14667 flow [2024-06-14 12:59:57,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 705 transitions, 14040 flow, removed 120 selfloop flow, removed 8 redundant places. [2024-06-14 12:59:57,383 INFO L231 Difference]: Finished difference. Result has 345 places, 651 transitions, 12507 flow [2024-06-14 12:59:57,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11993, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=648, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=195, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=450, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12507, PETRI_PLACES=345, PETRI_TRANSITIONS=651} [2024-06-14 12:59:57,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-14 12:59:57,384 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 651 transitions, 12507 flow [2024-06-14 12:59:57,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:57,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:59:57,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:59:57,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 12:59:57,385 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)] === [2024-06-14 12:59:57,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:59:57,385 INFO L85 PathProgramCache]: Analyzing trace with hash -123550362, now seen corresponding path program 1 times [2024-06-14 12:59:57,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:59:57,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434376212] [2024-06-14 12:59:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:59:57,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:59:57,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:59:58,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:59:58,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:59:58,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434376212] [2024-06-14 12:59:58,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434376212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:59:58,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:59:58,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:59:58,470 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770414148] [2024-06-14 12:59:58,470 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:59:58,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:59:58,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:59:58,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:59:58,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:59:58,544 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 12:59:58,544 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 651 transitions, 12507 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 12:59:58,544 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:59:58,544 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 12:59:58,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:00,675 INFO L124 PetriNetUnfolderBase]: 5409/8074 cut-off events. [2024-06-14 13:00:00,676 INFO L125 PetriNetUnfolderBase]: For 863476/863476 co-relation queries the response was YES. [2024-06-14 13:00:00,763 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84192 conditions, 8074 events. 5409/8074 cut-off events. For 863476/863476 co-relation queries the response was YES. Maximal size of possible extension queue 413. Compared 45388 event pairs, 1172 based on Foata normal form. 2/8075 useless extension candidates. Maximal degree in co-relation 84031. Up to 7966 conditions per place. [2024-06-14 13:00:00,802 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 637 selfloop transitions, 38 changer transitions 0/678 dead transitions. [2024-06-14 13:00:00,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 678 transitions, 14143 flow [2024-06-14 13:00:00,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:00,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:00,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:00:00,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 13:00:00,804 INFO L175 Difference]: Start difference. First operand has 345 places, 651 transitions, 12507 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:00:00,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 678 transitions, 14143 flow [2024-06-14 13:00:03,302 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 678 transitions, 13790 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:00:03,312 INFO L231 Difference]: Finished difference. Result has 346 places, 655 transitions, 12321 flow [2024-06-14 13:00:03,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12156, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=615, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12321, PETRI_PLACES=346, PETRI_TRANSITIONS=655} [2024-06-14 13:00:03,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:00:03,313 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 655 transitions, 12321 flow [2024-06-14 13:00:03,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:03,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:03,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:03,313 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:00:03,314 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)] === [2024-06-14 13:00:03,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:03,314 INFO L85 PathProgramCache]: Analyzing trace with hash 1011650440, now seen corresponding path program 2 times [2024-06-14 13:00:03,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:03,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316745895] [2024-06-14 13:00:03,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:03,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:03,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:04,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:04,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:04,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316745895] [2024-06-14 13:00:04,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316745895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:04,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:04,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:04,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705563853] [2024-06-14 13:00:04,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:04,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:04,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:04,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:04,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:04,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:04,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 655 transitions, 12321 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:04,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:04,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:04,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:07,061 INFO L124 PetriNetUnfolderBase]: 5417/8086 cut-off events. [2024-06-14 13:00:07,062 INFO L125 PetriNetUnfolderBase]: For 857063/857063 co-relation queries the response was YES. [2024-06-14 13:00:07,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83483 conditions, 8086 events. 5417/8086 cut-off events. For 857063/857063 co-relation queries the response was YES. Maximal size of possible extension queue 414. Compared 45444 event pairs, 1217 based on Foata normal form. 2/8087 useless extension candidates. Maximal degree in co-relation 83322. Up to 8011 conditions per place. [2024-06-14 13:00:07,190 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 636 selfloop transitions, 36 changer transitions 0/675 dead transitions. [2024-06-14 13:00:07,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 675 transitions, 13753 flow [2024-06-14 13:00:07,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:07,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:07,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:00:07,191 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 13:00:07,191 INFO L175 Difference]: Start difference. First operand has 346 places, 655 transitions, 12321 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:00:07,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 675 transitions, 13753 flow [2024-06-14 13:00:10,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 675 transitions, 13661 flow, removed 30 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:10,094 INFO L231 Difference]: Finished difference. Result has 351 places, 657 transitions, 12354 flow [2024-06-14 13:00:10,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12241, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=619, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12354, PETRI_PLACES=351, PETRI_TRANSITIONS=657} [2024-06-14 13:00:10,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-14 13:00:10,095 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 657 transitions, 12354 flow [2024-06-14 13:00:10,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:10,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:10,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:10,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:00:10,096 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)] === [2024-06-14 13:00:10,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:10,097 INFO L85 PathProgramCache]: Analyzing trace with hash 1129922818, now seen corresponding path program 1 times [2024-06-14 13:00:10,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:10,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103135974] [2024-06-14 13:00:10,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:10,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:10,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:11,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:11,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:11,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103135974] [2024-06-14 13:00:11,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103135974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:11,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:11,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:11,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296498255] [2024-06-14 13:00:11,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:11,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:11,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:11,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:11,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:11,525 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:11,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 657 transitions, 12354 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:11,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:11,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:11,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:13,703 INFO L124 PetriNetUnfolderBase]: 5425/8098 cut-off events. [2024-06-14 13:00:13,703 INFO L125 PetriNetUnfolderBase]: For 877474/877474 co-relation queries the response was YES. [2024-06-14 13:00:13,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83839 conditions, 8098 events. 5425/8098 cut-off events. For 877474/877474 co-relation queries the response was YES. Maximal size of possible extension queue 415. Compared 45527 event pairs, 1275 based on Foata normal form. 2/8099 useless extension candidates. Maximal degree in co-relation 83675. Up to 8039 conditions per place. [2024-06-14 13:00:13,837 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 644 selfloop transitions, 30 changer transitions 0/677 dead transitions. [2024-06-14 13:00:13,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 677 transitions, 13818 flow [2024-06-14 13:00:13,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:13,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:13,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:00:13,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 13:00:13,839 INFO L175 Difference]: Start difference. First operand has 351 places, 657 transitions, 12354 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:00:13,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 677 transitions, 13818 flow [2024-06-14 13:00:16,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 677 transitions, 13723 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:16,306 INFO L231 Difference]: Finished difference. Result has 354 places, 660 transitions, 12402 flow [2024-06-14 13:00:16,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12261, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=627, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12402, PETRI_PLACES=354, PETRI_TRANSITIONS=660} [2024-06-14 13:00:16,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 312 predicate places. [2024-06-14 13:00:16,307 INFO L495 AbstractCegarLoop]: Abstraction has has 354 places, 660 transitions, 12402 flow [2024-06-14 13:00:16,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:16,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:16,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:16,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:00:16,307 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)] === [2024-06-14 13:00:16,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:16,307 INFO L85 PathProgramCache]: Analyzing trace with hash 483153076, now seen corresponding path program 3 times [2024-06-14 13:00:16,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:16,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214120436] [2024-06-14 13:00:16,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:16,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:16,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:17,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:17,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:17,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214120436] [2024-06-14 13:00:17,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214120436] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:17,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:17,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:17,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383963616] [2024-06-14 13:00:17,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:17,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:17,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:17,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:17,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:17,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:17,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 354 places, 660 transitions, 12402 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:17,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:17,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:17,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:19,733 INFO L124 PetriNetUnfolderBase]: 5477/8178 cut-off events. [2024-06-14 13:00:19,733 INFO L125 PetriNetUnfolderBase]: For 940593/940593 co-relation queries the response was YES. [2024-06-14 13:00:19,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84751 conditions, 8178 events. 5477/8178 cut-off events. For 940593/940593 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 46186 event pairs, 1275 based on Foata normal form. 14/8191 useless extension candidates. Maximal degree in co-relation 84585. Up to 8040 conditions per place. [2024-06-14 13:00:19,879 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 644 selfloop transitions, 40 changer transitions 0/687 dead transitions. [2024-06-14 13:00:19,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 687 transitions, 13968 flow [2024-06-14 13:00:19,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:19,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:19,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:00:19,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 13:00:19,881 INFO L175 Difference]: Start difference. First operand has 354 places, 660 transitions, 12402 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:00:19,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 687 transitions, 13968 flow [2024-06-14 13:00:22,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 687 transitions, 13858 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:00:22,486 INFO L231 Difference]: Finished difference. Result has 357 places, 663 transitions, 12445 flow [2024-06-14 13:00:22,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12292, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=660, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=620, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12445, PETRI_PLACES=357, PETRI_TRANSITIONS=663} [2024-06-14 13:00:22,487 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:00:22,487 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 663 transitions, 12445 flow [2024-06-14 13:00:22,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:22,487 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:22,487 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:22,487 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:00:22,487 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)] === [2024-06-14 13:00:22,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:22,488 INFO L85 PathProgramCache]: Analyzing trace with hash 1080549286, now seen corresponding path program 4 times [2024-06-14 13:00:22,488 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:22,488 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092512629] [2024-06-14 13:00:22,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:22,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:22,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:23,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:23,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:23,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092512629] [2024-06-14 13:00:23,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092512629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:23,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:23,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:23,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337611653] [2024-06-14 13:00:23,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:23,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:23,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:23,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:23,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:23,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:23,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 663 transitions, 12445 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:23,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:23,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:23,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:26,206 INFO L124 PetriNetUnfolderBase]: 5516/8239 cut-off events. [2024-06-14 13:00:26,207 INFO L125 PetriNetUnfolderBase]: For 957742/957742 co-relation queries the response was YES. [2024-06-14 13:00:26,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85374 conditions, 8239 events. 5516/8239 cut-off events. For 957742/957742 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 46614 event pairs, 1233 based on Foata normal form. 14/8252 useless extension candidates. Maximal degree in co-relation 85206. Up to 7980 conditions per place. [2024-06-14 13:00:26,344 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 630 selfloop transitions, 59 changer transitions 0/692 dead transitions. [2024-06-14 13:00:26,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 692 transitions, 13995 flow [2024-06-14 13:00:26,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:26,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:26,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:00:26,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:00:26,346 INFO L175 Difference]: Start difference. First operand has 357 places, 663 transitions, 12445 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:00:26,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 692 transitions, 13995 flow [2024-06-14 13:00:28,438 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 692 transitions, 13866 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-14 13:00:28,448 INFO L231 Difference]: Finished difference. Result has 358 places, 664 transitions, 12479 flow [2024-06-14 13:00:28,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12316, PETRI_DIFFERENCE_MINUEND_PLACES=351, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=663, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12479, PETRI_PLACES=358, PETRI_TRANSITIONS=664} [2024-06-14 13:00:28,449 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 316 predicate places. [2024-06-14 13:00:28,449 INFO L495 AbstractCegarLoop]: Abstraction has has 358 places, 664 transitions, 12479 flow [2024-06-14 13:00:28,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:28,449 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:28,450 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:28,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:00:28,450 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)] === [2024-06-14 13:00:28,450 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:28,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1080733984, now seen corresponding path program 2 times [2024-06-14 13:00:28,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:28,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441339742] [2024-06-14 13:00:28,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:28,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:28,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:30,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:30,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441339742] [2024-06-14 13:00:30,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441339742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:30,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:30,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:30,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883741766] [2024-06-14 13:00:30,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:30,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:30,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:30,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:30,111 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:30,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:30,168 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 358 places, 664 transitions, 12479 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:30,168 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:30,168 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:30,168 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:32,528 INFO L124 PetriNetUnfolderBase]: 5534/8265 cut-off events. [2024-06-14 13:00:32,529 INFO L125 PetriNetUnfolderBase]: For 936756/936756 co-relation queries the response was YES. [2024-06-14 13:00:32,632 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85977 conditions, 8265 events. 5534/8265 cut-off events. For 936756/936756 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46735 event pairs, 1294 based on Foata normal form. 2/8266 useless extension candidates. Maximal degree in co-relation 85808. Up to 8196 conditions per place. [2024-06-14 13:00:32,677 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 647 selfloop transitions, 37 changer transitions 0/687 dead transitions. [2024-06-14 13:00:32,677 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 687 transitions, 14065 flow [2024-06-14 13:00:32,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:00:32,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:00:32,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:00:32,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-14 13:00:32,679 INFO L175 Difference]: Start difference. First operand has 358 places, 664 transitions, 12479 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:00:32,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 687 transitions, 14065 flow [2024-06-14 13:00:35,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 687 transitions, 13934 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:00:35,313 INFO L231 Difference]: Finished difference. Result has 360 places, 671 transitions, 12606 flow [2024-06-14 13:00:35,313 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12362, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=664, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=632, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=12606, PETRI_PLACES=360, PETRI_TRANSITIONS=671} [2024-06-14 13:00:35,314 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-14 13:00:35,314 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 671 transitions, 12606 flow [2024-06-14 13:00:35,314 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:35,314 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:35,314 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:35,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:00:35,314 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)] === [2024-06-14 13:00:35,315 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:35,315 INFO L85 PathProgramCache]: Analyzing trace with hash 1316909344, now seen corresponding path program 3 times [2024-06-14 13:00:35,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:35,315 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545257513] [2024-06-14 13:00:35,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:35,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:35,330 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:36,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:36,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:36,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545257513] [2024-06-14 13:00:36,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545257513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:36,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:36,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:36,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387892682] [2024-06-14 13:00:36,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:36,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:36,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:36,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:36,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:36,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:36,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 671 transitions, 12606 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:36,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:36,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:36,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:39,210 INFO L124 PetriNetUnfolderBase]: 5542/8277 cut-off events. [2024-06-14 13:00:39,211 INFO L125 PetriNetUnfolderBase]: For 923164/923164 co-relation queries the response was YES. [2024-06-14 13:00:39,304 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85731 conditions, 8277 events. 5542/8277 cut-off events. For 923164/923164 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 46864 event pairs, 1282 based on Foata normal form. 2/8278 useless extension candidates. Maximal degree in co-relation 85561. Up to 8202 conditions per place. [2024-06-14 13:00:39,344 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 647 selfloop transitions, 37 changer transitions 0/687 dead transitions. [2024-06-14 13:00:39,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 365 places, 687 transitions, 14076 flow [2024-06-14 13:00:39,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:00:39,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 13:00:39,346 INFO L175 Difference]: Start difference. First operand has 360 places, 671 transitions, 12606 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:00:39,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 365 places, 687 transitions, 14076 flow [2024-06-14 13:00:41,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 687 transitions, 13958 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 13:00:41,872 INFO L231 Difference]: Finished difference. Result has 363 places, 673 transitions, 12641 flow [2024-06-14 13:00:41,872 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12492, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=671, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=634, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12641, PETRI_PLACES=363, PETRI_TRANSITIONS=673} [2024-06-14 13:00:41,873 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 321 predicate places. [2024-06-14 13:00:41,873 INFO L495 AbstractCegarLoop]: Abstraction has has 363 places, 673 transitions, 12641 flow [2024-06-14 13:00:41,873 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:41,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:41,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:41,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:00:41,873 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)] === [2024-06-14 13:00:41,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:41,874 INFO L85 PathProgramCache]: Analyzing trace with hash 1317206014, now seen corresponding path program 4 times [2024-06-14 13:00:41,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:41,874 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216177871] [2024-06-14 13:00:41,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:41,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:41,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:43,319 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:43,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:43,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216177871] [2024-06-14 13:00:43,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216177871] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:43,320 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:43,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:00:43,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387896161] [2024-06-14 13:00:43,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:43,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:00:43,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:43,321 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:00:43,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:00:43,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:43,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 363 places, 673 transitions, 12641 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:43,405 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:43,405 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:43,405 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:45,550 INFO L124 PetriNetUnfolderBase]: 5537/8271 cut-off events. [2024-06-14 13:00:45,550 INFO L125 PetriNetUnfolderBase]: For 909088/909090 co-relation queries the response was YES. [2024-06-14 13:00:45,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85400 conditions, 8271 events. 5537/8271 cut-off events. For 909088/909090 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 46729 event pairs, 1235 based on Foata normal form. 4/8274 useless extension candidates. Maximal degree in co-relation 85229. Up to 8181 conditions per place. [2024-06-14 13:00:45,688 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 645 selfloop transitions, 38 changer transitions 0/686 dead transitions. [2024-06-14 13:00:45,688 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 686 transitions, 14097 flow [2024-06-14 13:00:45,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:00:45,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:00:45,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-14 13:00:45,689 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 13:00:45,689 INFO L175 Difference]: Start difference. First operand has 363 places, 673 transitions, 12641 flow. Second operand 6 states and 93 transitions. [2024-06-14 13:00:45,689 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 686 transitions, 14097 flow [2024-06-14 13:00:48,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 686 transitions, 13970 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:48,605 INFO L231 Difference]: Finished difference. Result has 365 places, 675 transitions, 12663 flow [2024-06-14 13:00:48,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12518, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=673, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=635, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=12663, PETRI_PLACES=365, PETRI_TRANSITIONS=675} [2024-06-14 13:00:48,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 13:00:48,606 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 675 transitions, 12663 flow [2024-06-14 13:00:48,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 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) [2024-06-14 13:00:48,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:48,606 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:48,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:00:48,606 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)] === [2024-06-14 13:00:48,607 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:48,607 INFO L85 PathProgramCache]: Analyzing trace with hash -872712445, now seen corresponding path program 1 times [2024-06-14 13:00:48,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:48,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844674833] [2024-06-14 13:00:48,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:48,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:48,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:49,650 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:49,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:49,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844674833] [2024-06-14 13:00:49,650 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844674833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:49,650 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:49,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:49,651 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837488344] [2024-06-14 13:00:49,651 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:49,651 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:49,651 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:49,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:49,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:49,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:49,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 675 transitions, 12663 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:00:49,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:49,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:49,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:52,043 INFO L124 PetriNetUnfolderBase]: 5550/8290 cut-off events. [2024-06-14 13:00:52,043 INFO L125 PetriNetUnfolderBase]: For 913181/913183 co-relation queries the response was YES. [2024-06-14 13:00:52,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85623 conditions, 8290 events. 5550/8290 cut-off events. For 913181/913183 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 46884 event pairs, 1089 based on Foata normal form. 1/8290 useless extension candidates. Maximal degree in co-relation 85451. Up to 7435 conditions per place. [2024-06-14 13:00:52,192 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 540 selfloop transitions, 172 changer transitions 0/715 dead transitions. [2024-06-14 13:00:52,192 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 715 transitions, 14869 flow [2024-06-14 13:00:52,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:52,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:52,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:00:52,194 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 13:00:52,194 INFO L175 Difference]: Start difference. First operand has 365 places, 675 transitions, 12663 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:00:52,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 715 transitions, 14869 flow [2024-06-14 13:00:55,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 715 transitions, 14740 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:00:55,118 INFO L231 Difference]: Finished difference. Result has 369 places, 683 transitions, 13096 flow [2024-06-14 13:00:55,118 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12534, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=164, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=511, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13096, PETRI_PLACES=369, PETRI_TRANSITIONS=683} [2024-06-14 13:00:55,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 13:00:55,119 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 683 transitions, 13096 flow [2024-06-14 13:00:55,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:00:55,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:00:55,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:00:55,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:00:55,119 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)] === [2024-06-14 13:00:55,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:00:55,120 INFO L85 PathProgramCache]: Analyzing trace with hash 476860709, now seen corresponding path program 2 times [2024-06-14 13:00:55,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:00:55,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267751502] [2024-06-14 13:00:55,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:00:55,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:00:55,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:00:56,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:00:56,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:00:56,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267751502] [2024-06-14 13:00:56,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267751502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:00:56,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:00:56,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:00:56,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160746945] [2024-06-14 13:00:56,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:00:56,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:00:56,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:00:56,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:00:56,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:00:56,298 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:00:56,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 683 transitions, 13096 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:00:56,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:00:56,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:00:56,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:00:58,526 INFO L124 PetriNetUnfolderBase]: 5579/8330 cut-off events. [2024-06-14 13:00:58,526 INFO L125 PetriNetUnfolderBase]: For 937774/937776 co-relation queries the response was YES. [2024-06-14 13:00:58,624 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87036 conditions, 8330 events. 5579/8330 cut-off events. For 937774/937776 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 47148 event pairs, 1097 based on Foata normal form. 1/8330 useless extension candidates. Maximal degree in co-relation 86863. Up to 7462 conditions per place. [2024-06-14 13:00:58,664 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 537 selfloop transitions, 179 changer transitions 0/719 dead transitions. [2024-06-14 13:00:58,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 719 transitions, 15253 flow [2024-06-14 13:00:58,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:00:58,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:00:58,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:00:58,665 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 13:00:58,665 INFO L175 Difference]: Start difference. First operand has 369 places, 683 transitions, 13096 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:00:58,665 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 719 transitions, 15253 flow [2024-06-14 13:01:01,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 719 transitions, 14885 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:01,379 INFO L231 Difference]: Finished difference. Result has 373 places, 689 transitions, 13243 flow [2024-06-14 13:01:01,380 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12736, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=683, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=173, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13243, PETRI_PLACES=373, PETRI_TRANSITIONS=689} [2024-06-14 13:01:01,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 13:01:01,380 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 689 transitions, 13243 flow [2024-06-14 13:01:01,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:01:01,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:01,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:01,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:01:01,381 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)] === [2024-06-14 13:01:01,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:01,381 INFO L85 PathProgramCache]: Analyzing trace with hash 563402789, now seen corresponding path program 3 times [2024-06-14 13:01:01,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:01,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781722812] [2024-06-14 13:01:01,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:01,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:01,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781722812] [2024-06-14 13:01:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781722812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:01:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87309955] [2024-06-14 13:01:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:01:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:01:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:01:02,609 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:02,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 689 transitions, 13243 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:01:02,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:02,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:02,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:04,911 INFO L124 PetriNetUnfolderBase]: 5570/8318 cut-off events. [2024-06-14 13:01:04,912 INFO L125 PetriNetUnfolderBase]: For 960435/960437 co-relation queries the response was YES. [2024-06-14 13:01:05,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86937 conditions, 8318 events. 5570/8318 cut-off events. For 960435/960437 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 47072 event pairs, 1091 based on Foata normal form. 3/8320 useless extension candidates. Maximal degree in co-relation 86763. Up to 7639 conditions per place. [2024-06-14 13:01:05,055 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 568 selfloop transitions, 148 changer transitions 0/719 dead transitions. [2024-06-14 13:01:05,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 719 transitions, 15099 flow [2024-06-14 13:01:05,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:01:05,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:01:05,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:01:05,056 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 13:01:05,056 INFO L175 Difference]: Start difference. First operand has 373 places, 689 transitions, 13243 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:01:05,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 719 transitions, 15099 flow [2024-06-14 13:01:08,491 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 719 transitions, 14751 flow, removed 47 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:08,502 INFO L231 Difference]: Finished difference. Result has 377 places, 689 transitions, 13199 flow [2024-06-14 13:01:08,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12895, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=148, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=541, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13199, PETRI_PLACES=377, PETRI_TRANSITIONS=689} [2024-06-14 13:01:08,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 13:01:08,502 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 689 transitions, 13199 flow [2024-06-14 13:01:08,503 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:01:08,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:08,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:08,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:01:08,503 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)] === [2024-06-14 13:01:08,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:08,503 INFO L85 PathProgramCache]: Analyzing trace with hash -867259700, now seen corresponding path program 1 times [2024-06-14 13:01:08,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:08,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1334623172] [2024-06-14 13:01:08,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:08,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:08,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:09,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:09,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1334623172] [2024-06-14 13:01:09,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1334623172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:09,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:09,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:01:09,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1883885306] [2024-06-14 13:01:09,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:09,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:01:09,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:09,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:01:09,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:01:10,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:10,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 689 transitions, 13199 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:10,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:10,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:10,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:13,267 INFO L124 PetriNetUnfolderBase]: 6178/9266 cut-off events. [2024-06-14 13:01:13,267 INFO L125 PetriNetUnfolderBase]: For 1385293/1385295 co-relation queries the response was YES. [2024-06-14 13:01:13,380 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99818 conditions, 9266 events. 6178/9266 cut-off events. For 1385293/1385295 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 53155 event pairs, 899 based on Foata normal form. 56/9321 useless extension candidates. Maximal degree in co-relation 99643. Up to 4902 conditions per place. [2024-06-14 13:01:13,427 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 405 selfloop transitions, 351 changer transitions 13/772 dead transitions. [2024-06-14 13:01:13,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 772 transitions, 16371 flow [2024-06-14 13:01:13,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:13,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:13,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 203 transitions. [2024-06-14 13:01:13,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4951219512195122 [2024-06-14 13:01:13,428 INFO L175 Difference]: Start difference. First operand has 377 places, 689 transitions, 13199 flow. Second operand 10 states and 203 transitions. [2024-06-14 13:01:13,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 772 transitions, 16371 flow [2024-06-14 13:01:17,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 772 transitions, 16080 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:01:17,290 INFO L231 Difference]: Finished difference. Result has 387 places, 701 transitions, 14562 flow [2024-06-14 13:01:17,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=12908, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=689, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=14562, PETRI_PLACES=387, PETRI_TRANSITIONS=701} [2024-06-14 13:01:17,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 345 predicate places. [2024-06-14 13:01:17,291 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 701 transitions, 14562 flow [2024-06-14 13:01:17,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:17,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:17,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:17,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:01:17,292 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)] === [2024-06-14 13:01:17,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:17,292 INFO L85 PathProgramCache]: Analyzing trace with hash -866990930, now seen corresponding path program 2 times [2024-06-14 13:01:17,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:17,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828463184] [2024-06-14 13:01:17,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:17,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:17,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:19,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:19,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:19,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828463184] [2024-06-14 13:01:19,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828463184] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:19,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:19,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:01:19,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594374968] [2024-06-14 13:01:19,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:19,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:01:19,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:19,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:01:19,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:01:19,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:19,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 701 transitions, 14562 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:19,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:19,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:19,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:22,710 INFO L124 PetriNetUnfolderBase]: 6201/9323 cut-off events. [2024-06-14 13:01:22,710 INFO L125 PetriNetUnfolderBase]: For 1487458/1487460 co-relation queries the response was YES. [2024-06-14 13:01:22,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105771 conditions, 9323 events. 6201/9323 cut-off events. For 1487458/1487460 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 53675 event pairs, 1155 based on Foata normal form. 68/9390 useless extension candidates. Maximal degree in co-relation 105591. Up to 6596 conditions per place. [2024-06-14 13:01:22,844 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 416 selfloop transitions, 341 changer transitions 0/760 dead transitions. [2024-06-14 13:01:22,845 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 760 transitions, 17194 flow [2024-06-14 13:01:22,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:01:22,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:01:22,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 194 transitions. [2024-06-14 13:01:22,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47317073170731705 [2024-06-14 13:01:22,846 INFO L175 Difference]: Start difference. First operand has 387 places, 701 transitions, 14562 flow. Second operand 10 states and 194 transitions. [2024-06-14 13:01:22,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 760 transitions, 17194 flow [2024-06-14 13:01:27,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 760 transitions, 16981 flow, removed 79 selfloop flow, removed 3 redundant places. [2024-06-14 13:01:27,318 INFO L231 Difference]: Finished difference. Result has 395 places, 706 transitions, 15247 flow [2024-06-14 13:01:27,319 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14375, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=336, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=15247, PETRI_PLACES=395, PETRI_TRANSITIONS=706} [2024-06-14 13:01:27,340 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 13:01:27,340 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 706 transitions, 15247 flow [2024-06-14 13:01:27,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:27,340 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:27,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:27,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:01:27,341 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)] === [2024-06-14 13:01:27,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:27,341 INFO L85 PathProgramCache]: Analyzing trace with hash -867000230, now seen corresponding path program 3 times [2024-06-14 13:01:27,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:27,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789357463] [2024-06-14 13:01:27,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:27,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:27,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:29,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:29,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789357463] [2024-06-14 13:01:29,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789357463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:29,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:29,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:01:29,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571915284] [2024-06-14 13:01:29,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:29,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:01:29,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:29,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:01:29,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:01:29,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:29,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 706 transitions, 15247 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:29,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:29,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:29,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:33,076 INFO L124 PetriNetUnfolderBase]: 6257/9410 cut-off events. [2024-06-14 13:01:33,077 INFO L125 PetriNetUnfolderBase]: For 1380569/1380571 co-relation queries the response was YES. [2024-06-14 13:01:33,182 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108146 conditions, 9410 events. 6257/9410 cut-off events. For 1380569/1380571 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 54549 event pairs, 1511 based on Foata normal form. 18/9427 useless extension candidates. Maximal degree in co-relation 107963. Up to 8882 conditions per place. [2024-06-14 13:01:33,226 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 647 selfloop transitions, 104 changer transitions 0/754 dead transitions. [2024-06-14 13:01:33,227 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 754 transitions, 17073 flow [2024-06-14 13:01:33,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:01:33,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:01:33,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-14 13:01:33,228 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4212860310421286 [2024-06-14 13:01:33,228 INFO L175 Difference]: Start difference. First operand has 395 places, 706 transitions, 15247 flow. Second operand 11 states and 190 transitions. [2024-06-14 13:01:33,228 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 754 transitions, 17073 flow [2024-06-14 13:01:37,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 398 places, 754 transitions, 16452 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-14 13:01:37,314 INFO L231 Difference]: Finished difference. Result has 399 places, 708 transitions, 14923 flow [2024-06-14 13:01:37,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14626, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=14923, PETRI_PLACES=399, PETRI_TRANSITIONS=708} [2024-06-14 13:01:37,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 357 predicate places. [2024-06-14 13:01:37,316 INFO L495 AbstractCegarLoop]: Abstraction has has 399 places, 708 transitions, 14923 flow [2024-06-14 13:01:37,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:37,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:37,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:37,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:01:37,316 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)] === [2024-06-14 13:01:37,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:37,317 INFO L85 PathProgramCache]: Analyzing trace with hash 740711164, now seen corresponding path program 4 times [2024-06-14 13:01:37,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:37,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275710054] [2024-06-14 13:01:37,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:37,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:37,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:39,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:39,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275710054] [2024-06-14 13:01:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275710054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:39,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:39,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:01:39,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863051925] [2024-06-14 13:01:39,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:39,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:01:39,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:39,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:01:39,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:01:39,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:39,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 399 places, 708 transitions, 14923 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:39,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:39,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:39,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:43,492 INFO L124 PetriNetUnfolderBase]: 7132/10767 cut-off events. [2024-06-14 13:01:43,493 INFO L125 PetriNetUnfolderBase]: For 1866377/1866379 co-relation queries the response was YES. [2024-06-14 13:01:43,627 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125337 conditions, 10767 events. 7132/10767 cut-off events. For 1866377/1866379 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 63993 event pairs, 1603 based on Foata normal form. 58/10824 useless extension candidates. Maximal degree in co-relation 125154. Up to 9095 conditions per place. [2024-06-14 13:01:43,689 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 635 selfloop transitions, 151 changer transitions 0/789 dead transitions. [2024-06-14 13:01:43,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 789 transitions, 18131 flow [2024-06-14 13:01:43,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:01:43,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:01:43,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2024-06-14 13:01:43,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43458980044345896 [2024-06-14 13:01:43,690 INFO L175 Difference]: Start difference. First operand has 399 places, 708 transitions, 14923 flow. Second operand 11 states and 196 transitions. [2024-06-14 13:01:43,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 789 transitions, 18131 flow [2024-06-14 13:01:49,206 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 789 transitions, 17892 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 13:01:49,219 INFO L231 Difference]: Finished difference. Result has 405 places, 734 transitions, 15815 flow [2024-06-14 13:01:49,220 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=14684, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=708, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15815, PETRI_PLACES=405, PETRI_TRANSITIONS=734} [2024-06-14 13:01:49,220 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 363 predicate places. [2024-06-14 13:01:49,220 INFO L495 AbstractCegarLoop]: Abstraction has has 405 places, 734 transitions, 15815 flow [2024-06-14 13:01:49,220 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:49,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:01:49,221 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:01:49,221 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:01:49,221 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)] === [2024-06-14 13:01:49,221 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:01:49,221 INFO L85 PathProgramCache]: Analyzing trace with hash 740720464, now seen corresponding path program 5 times [2024-06-14 13:01:49,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:01:49,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28452957] [2024-06-14 13:01:49,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:01:49,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:01:49,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:01:51,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:01:51,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:01:51,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28452957] [2024-06-14 13:01:51,127 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28452957] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:01:51,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:01:51,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:01:51,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296176905] [2024-06-14 13:01:51,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:01:51,128 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:01:51,128 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:01:51,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:01:51,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=88, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:01:51,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:01:51,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 405 places, 734 transitions, 15815 flow. Second operand has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:01:51,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:01:51,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:01:51,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:01:55,258 INFO L124 PetriNetUnfolderBase]: 7302/11061 cut-off events. [2024-06-14 13:01:55,258 INFO L125 PetriNetUnfolderBase]: For 1893393/1893395 co-relation queries the response was YES. [2024-06-14 13:01:55,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 126639 conditions, 11061 events. 7302/11061 cut-off events. For 1893393/1893395 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 66404 event pairs, 1831 based on Foata normal form. 70/11130 useless extension candidates. Maximal degree in co-relation 126452. Up to 10031 conditions per place. [2024-06-14 13:01:55,585 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 634 selfloop transitions, 148 changer transitions 0/785 dead transitions. [2024-06-14 13:01:55,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 785 transitions, 18125 flow [2024-06-14 13:01:55,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:01:55,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:01:55,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 192 transitions. [2024-06-14 13:01:55,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42572062084257206 [2024-06-14 13:01:55,587 INFO L175 Difference]: Start difference. First operand has 405 places, 734 transitions, 15815 flow. Second operand 11 states and 192 transitions. [2024-06-14 13:01:55,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 785 transitions, 18125 flow [2024-06-14 13:02:01,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 785 transitions, 17815 flow, removed 63 selfloop flow, removed 6 redundant places. [2024-06-14 13:02:01,019 INFO L231 Difference]: Finished difference. Result has 412 places, 738 transitions, 15973 flow [2024-06-14 13:02:01,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15525, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=15973, PETRI_PLACES=412, PETRI_TRANSITIONS=738} [2024-06-14 13:02:01,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 13:02:01,020 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 738 transitions, 15973 flow [2024-06-14 13:02:01,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.636363636363637) internal successors, (95), 11 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:02:01,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:01,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:01,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:02:01,021 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)] === [2024-06-14 13:02:01,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:01,021 INFO L85 PathProgramCache]: Analyzing trace with hash -1195347678, now seen corresponding path program 1 times [2024-06-14 13:02:01,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:01,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118049781] [2024-06-14 13:02:01,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:01,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:01,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:02,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:02,106 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:02,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118049781] [2024-06-14 13:02:02,106 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118049781] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:02,106 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:02,106 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:02,106 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797193002] [2024-06-14 13:02:02,106 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:02,107 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:02,107 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:02,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:02,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:02,172 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:02,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 738 transitions, 15973 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:02:02,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:02,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:02,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:05,912 INFO L124 PetriNetUnfolderBase]: 7354/11134 cut-off events. [2024-06-14 13:02:05,912 INFO L125 PetriNetUnfolderBase]: For 1744107/1744109 co-relation queries the response was YES. [2024-06-14 13:02:06,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 128760 conditions, 11134 events. 7354/11134 cut-off events. For 1744107/1744109 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 67126 event pairs, 1781 based on Foata normal form. 4/11137 useless extension candidates. Maximal degree in co-relation 128569. Up to 10093 conditions per place. [2024-06-14 13:02:06,150 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 551 selfloop transitions, 230 changer transitions 0/784 dead transitions. [2024-06-14 13:02:06,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 784 transitions, 18550 flow [2024-06-14 13:02:06,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:06,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:06,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 13:02:06,152 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45121951219512196 [2024-06-14 13:02:06,152 INFO L175 Difference]: Start difference. First operand has 412 places, 738 transitions, 15973 flow. Second operand 8 states and 148 transitions. [2024-06-14 13:02:06,152 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 784 transitions, 18550 flow [2024-06-14 13:02:11,729 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 784 transitions, 18162 flow, removed 48 selfloop flow, removed 9 redundant places. [2024-06-14 13:02:11,741 INFO L231 Difference]: Finished difference. Result has 413 places, 751 transitions, 16583 flow [2024-06-14 13:02:11,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15593, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=218, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16583, PETRI_PLACES=413, PETRI_TRANSITIONS=751} [2024-06-14 13:02:11,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-14 13:02:11,742 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 751 transitions, 16583 flow [2024-06-14 13:02:11,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:02:11,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:11,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:11,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:02:11,742 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)] === [2024-06-14 13:02:11,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:11,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1501450326, now seen corresponding path program 2 times [2024-06-14 13:02:11,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:11,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [532645365] [2024-06-14 13:02:11,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:11,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:11,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:12,771 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:12,772 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:12,772 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [532645365] [2024-06-14 13:02:12,772 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [532645365] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:12,772 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:12,772 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:12,772 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213968386] [2024-06-14 13:02:12,772 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:12,772 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:12,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:12,773 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:12,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:12,860 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:12,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 751 transitions, 16583 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:02:12,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:12,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:12,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:16,578 INFO L124 PetriNetUnfolderBase]: 7396/11192 cut-off events. [2024-06-14 13:02:16,578 INFO L125 PetriNetUnfolderBase]: For 1759925/1759927 co-relation queries the response was YES. [2024-06-14 13:02:16,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 130128 conditions, 11192 events. 7396/11192 cut-off events. For 1759925/1759927 co-relation queries the response was YES. Maximal size of possible extension queue 487. Compared 67471 event pairs, 1765 based on Foata normal form. 2/11193 useless extension candidates. Maximal degree in co-relation 129935. Up to 10117 conditions per place. [2024-06-14 13:02:16,770 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 554 selfloop transitions, 233 changer transitions 0/790 dead transitions. [2024-06-14 13:02:16,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 790 transitions, 19096 flow [2024-06-14 13:02:16,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:02:16,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:02:16,771 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 13:02:16,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4329268292682927 [2024-06-14 13:02:16,772 INFO L175 Difference]: Start difference. First operand has 413 places, 751 transitions, 16583 flow. Second operand 8 states and 142 transitions. [2024-06-14 13:02:16,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 790 transitions, 19096 flow [2024-06-14 13:02:22,440 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 790 transitions, 18465 flow, removed 83 selfloop flow, removed 5 redundant places. [2024-06-14 13:02:22,451 INFO L231 Difference]: Finished difference. Result has 417 places, 760 transitions, 16778 flow [2024-06-14 13:02:22,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=15968, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=751, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=225, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=525, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=16778, PETRI_PLACES=417, PETRI_TRANSITIONS=760} [2024-06-14 13:02:22,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-14 13:02:22,452 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 760 transitions, 16778 flow [2024-06-14 13:02:22,452 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:02:22,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:02:22,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:02:22,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:02:22,453 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)] === [2024-06-14 13:02:22,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:02:22,453 INFO L85 PathProgramCache]: Analyzing trace with hash -1506692736, now seen corresponding path program 3 times [2024-06-14 13:02:22,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:02:22,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668557423] [2024-06-14 13:02:22,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:02:22,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:02:22,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:02:23,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:02:23,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:02:23,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668557423] [2024-06-14 13:02:23,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668557423] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:02:23,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:02:23,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:02:23,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588829229] [2024-06-14 13:02:23,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:02:23,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:02:23,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:02:23,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:02:23,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:02:23,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:02:23,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 760 transitions, 16778 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 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) [2024-06-14 13:02:23,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:02:23,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:02:23,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:02:27,173 INFO L124 PetriNetUnfolderBase]: 7400/11197 cut-off events. [2024-06-14 13:02:27,173 INFO L125 PetriNetUnfolderBase]: For 1811087/1811089 co-relation queries the response was YES.