./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_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/mix028_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/mix028_power.oepc_pso.oepc_rmo.oepc.i ./goblint.2024-05-21_14-57-05.files/protection/mix028_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 12:14:20,829 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 12:14:20,894 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 12:14:20,898 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 12:14:20,898 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 12:14:20,930 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 12:14:20,930 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 12:14:20,930 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 12:14:20,931 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 12:14:20,934 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 12:14:20,934 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 12:14:20,934 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 12:14:20,935 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 12:14:20,936 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 12:14:20,936 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 12:14:20,936 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 12:14:20,936 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 12:14:20,936 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 12:14:20,936 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 12:14:20,936 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 12:14:20,937 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 12:14:20,937 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 12:14:20,937 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 12:14:20,937 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 12:14:20,937 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 12:14:20,937 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 12:14:20,938 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 12:14:20,938 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 12:14:20,938 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 12:14:20,938 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 12:14:20,939 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 12:14:20,939 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 12:14:20,939 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:14:20,939 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 12:14:20,939 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 12:14:20,939 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 12:14:20,939 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 12:14:20,940 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 12:14:20,940 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 12:14:20,940 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 12:14:20,940 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 12:14:20,940 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 12:14:20,940 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 12:14:20,940 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 12:14:21,154 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 12:14:21,176 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 12:14:21,178 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 12:14:21,179 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 12:14:21,184 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 12:14:21,185 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix028_power.oepc_pso.oepc_rmo.oepc.yml/witness.yml [2024-06-14 12:14:21,373 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 12:14:21,373 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 12:14:21,374 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:14:22,333 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 12:14:22,554 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 12:14:22,557 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:14:22,575 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae2bad0cf/b417b0dd4d564086aeef517dc069f235/FLAGf881c0bb2 [2024-06-14 12:14:22,594 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ae2bad0cf/b417b0dd4d564086aeef517dc069f235 [2024-06-14 12:14:22,595 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 12:14:22,596 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 12:14:22,597 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 12:14:22,597 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 12:14:22,600 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 12:14:22,601 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:21" (1/2) ... [2024-06-14 12:14:22,602 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b703283 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:22, skipping insertion in model container [2024-06-14 12:14:22,602 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:21" (1/2) ... [2024-06-14 12:14:22,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@48e87a8f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 12:14:22, skipping insertion in model container [2024-06-14 12:14:22,603 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:14:22" (2/2) ... [2024-06-14 12:14:22,603 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5b703283 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:22, skipping insertion in model container [2024-06-14 12:14:22,603 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 12:14:22" (2/2) ... [2024-06-14 12:14:22,603 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 12:14:22,674 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 12:14:22,675 INFO L97 edCorrectnessWitness]: Location invariant before [L841-L841] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! 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 || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 12:14:22,675 INFO L97 edCorrectnessWitness]: Location invariant before [L839-L839] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 12:14:22,675 INFO L97 edCorrectnessWitness]: Location invariant before [L842-L842] (((((((((((((((((! multithreaded || z$r_buff0_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || z$r_buff1_thd2 == (_Bool)0)) && (! multithreaded || z$read_delayed == (_Bool)0)) && (! multithreaded || ((0 <= z$w_buff0 && z$w_buff0 <= 1) && (z$w_buff0 == 0 || z$w_buff0 == 1)))) && (! multithreaded || ((0 <= z$mem_tmp && z$mem_tmp <= 1) && (z$mem_tmp == 0 || z$mem_tmp == 1)))) && (! multithreaded || z$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! 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 || z$flush_delayed == (_Bool)0)) && (! multithreaded || z$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || z$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || z$read_delayed_var == 0)) && (! multithreaded || z$r_buff0_thd2 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z$w_buff1 && z$w_buff1 <= 1) && (z$w_buff1 == 0 || z$w_buff1 == 1))) [2024-06-14 12:14:22,675 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 12:14:22,676 INFO L106 edCorrectnessWitness]: ghost_update [L837-L837] multithreaded = 1; [2024-06-14 12:14:22,714 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 12:14:23,002 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:14:23,009 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 12:14:23,115 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 12:14:23,143 INFO L206 MainTranslator]: Completed translation [2024-06-14 12:14:23,144 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23 WrapperNode [2024-06-14 12:14:23,144 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 12:14:23,145 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 12:14:23,146 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 12:14:23,146 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 12:14:23,151 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,163 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,188 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 125 [2024-06-14 12:14:23,188 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 12:14:23,189 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 12:14:23,189 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 12:14:23,189 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 12:14:23,197 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,198 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,201 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,219 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 12:14:23,220 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,220 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,232 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,234 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,240 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,242 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,244 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 12:14:23,245 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 12:14:23,245 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 12:14:23,245 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 12:14:23,246 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (1/1) ... [2024-06-14 12:14:23,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 12:14:23,255 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 12:14:23,267 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 12:14:23,274 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 12:14:23,298 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 12:14:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 12:14:23,299 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 12:14:23,299 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 12:14:23,300 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 12:14:23,300 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 12:14:23,300 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 12:14:23,300 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 12:14:23,300 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 12:14:23,300 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 12:14:23,301 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 12:14:23,301 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 12:14:23,302 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 12:14:23,395 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 12:14:23,396 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 12:14:23,822 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 12:14:23,822 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 12:14:23,946 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 12:14:23,946 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 12:14:23,947 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:14:23 BoogieIcfgContainer [2024-06-14 12:14:23,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 12:14:23,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 12:14:23,949 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 12:14:23,951 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 12:14:23,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 12:14:21" (1/4) ... [2024-06-14 12:14:23,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebb16d7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 12:14:23, skipping insertion in model container [2024-06-14 12:14:23,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 12:14:22" (2/4) ... [2024-06-14 12:14:23,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebb16d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:14:23, skipping insertion in model container [2024-06-14 12:14:23,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 12:14:23" (3/4) ... [2024-06-14 12:14:23,953 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ebb16d7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 12:14:23, skipping insertion in model container [2024-06-14 12:14:23,953 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 12:14:23" (4/4) ... [2024-06-14 12:14:23,954 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.oepc_pso.oepc_rmo.oepc.i [2024-06-14 12:14:23,966 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 12:14:23,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 12:14:23,966 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 12:14:24,003 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 12:14:24,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:14:24,054 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-14 12:14:24,054 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:14:24,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 60 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 12:14:24,056 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-14 12:14:24,058 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-14 12:14:24,069 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 12:14:24,074 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;@15f343a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 12:14:24,075 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 12:14:24,079 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 12:14:24,079 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 12:14:24,079 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 12:14:24,080 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:24,080 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 12:14:24,080 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 12:14:24,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:24,084 INFO L85 PathProgramCache]: Analyzing trace with hash -1481508285, now seen corresponding path program 1 times [2024-06-14 12:14:24,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:24,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8449126] [2024-06-14 12:14:24,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:24,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:24,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:24,988 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:24,989 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:24,989 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8449126] [2024-06-14 12:14:24,990 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8449126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:24,990 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:24,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 12:14:24,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752460780] [2024-06-14 12:14:24,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:24,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 12:14:25,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:25,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 12:14:25,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 12:14:25,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:25,059 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:14:25,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:25,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:25,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:25,441 INFO L124 PetriNetUnfolderBase]: 1659/2538 cut-off events. [2024-06-14 12:14:25,441 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 12:14:25,447 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5104 conditions, 2538 events. 1659/2538 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12026 event pairs, 1184 based on Foata normal form. 1/2498 useless extension candidates. Maximal degree in co-relation 5089. Up to 2465 conditions per place. [2024-06-14 12:14:25,457 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 35 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 12:14:25,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 179 flow [2024-06-14 12:14:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 12:14:25,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 12:14:25,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-06-14 12:14:25,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 12:14:25,468 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 72 transitions. [2024-06-14 12:14:25,469 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 179 flow [2024-06-14 12:14:25,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 174 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:25,474 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-14 12:14:25,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-14 12:14:25,478 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-14 12:14:25,478 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-14 12:14:25,478 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states 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 12:14:25,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:25,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:25,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 12:14:25,479 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 12:14:25,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:25,479 INFO L85 PathProgramCache]: Analyzing trace with hash -2095269470, now seen corresponding path program 1 times [2024-06-14 12:14:25,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:25,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368249712] [2024-06-14 12:14:25,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:26,093 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 12:14:26,093 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:26,093 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368249712] [2024-06-14 12:14:26,093 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368249712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:26,093 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:26,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 12:14:26,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316666182] [2024-06-14 12:14:26,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:26,096 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 12:14:26,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:26,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 12:14:26,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-06-14 12:14:26,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:26,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 12:14:26,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:26,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:26,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:26,451 INFO L124 PetriNetUnfolderBase]: 1653/2529 cut-off events. [2024-06-14 12:14:26,452 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-14 12:14:26,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5720 conditions, 2529 events. 1653/2529 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12029 event pairs, 1038 based on Foata normal form. 3/2531 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-14 12:14:26,463 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-14 12:14:26,464 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-14 12:14:26,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 12:14:26,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 12:14:26,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 92 transitions. [2024-06-14 12:14:26,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2024-06-14 12:14:26,467 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 92 transitions. [2024-06-14 12:14:26,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-14 12:14:26,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 12:14:26,470 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-14 12:14:26,470 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-14 12:14:26,470 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-14 12:14:26,471 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-14 12:14:26,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states 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 12:14:26,471 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:26,472 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:26,473 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 12:14:26,474 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 12:14:26,474 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:26,474 INFO L85 PathProgramCache]: Analyzing trace with hash -528843524, now seen corresponding path program 1 times [2024-06-14 12:14:26,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:26,478 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957805249] [2024-06-14 12:14:26,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:26,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:26,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:27,122 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:27,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:27,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957805249] [2024-06-14 12:14:27,123 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957805249] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:27,123 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:27,123 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 12:14:27,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216400537] [2024-06-14 12:14:27,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:27,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 12:14:27,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:27,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 12:14:27,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 12:14:27,177 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:27,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 flow. Second operand has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 12:14:27,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:27,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:27,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:27,461 INFO L124 PetriNetUnfolderBase]: 1661/2559 cut-off events. [2024-06-14 12:14:27,462 INFO L125 PetriNetUnfolderBase]: For 1306/1306 co-relation queries the response was YES. [2024-06-14 12:14:27,465 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6387 conditions, 2559 events. 1661/2559 cut-off events. For 1306/1306 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12225 event pairs, 812 based on Foata normal form. 5/2563 useless extension candidates. Maximal degree in co-relation 6370. Up to 2387 conditions per place. [2024-06-14 12:14:27,475 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/75 dead transitions. [2024-06-14 12:14:27,475 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 75 transitions, 400 flow [2024-06-14 12:14:27,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:27,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:27,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 12:14:27,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 12:14:27,480 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 120 transitions. [2024-06-14 12:14:27,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 75 transitions, 400 flow [2024-06-14 12:14:27,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 75 transitions, 386 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:27,484 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 237 flow [2024-06-14 12:14:27,484 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=237, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-14 12:14:27,485 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-14 12:14:27,485 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 237 flow [2024-06-14 12:14:27,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.6) internal successors, (58), 5 states have internal predecessors, (58), 0 states have call successors, (0), 0 states 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 12:14:27,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:27,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:27,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 12:14:27,486 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 12:14:27,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:27,487 INFO L85 PathProgramCache]: Analyzing trace with hash 1395244437, now seen corresponding path program 1 times [2024-06-14 12:14:27,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:27,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391309734] [2024-06-14 12:14:27,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:27,488 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:27,511 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:28,372 INFO 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 12:14:28,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391309734] [2024-06-14 12:14:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391309734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:28,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:28,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:14:28,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515192885] [2024-06-14 12:14:28,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:28,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:14:28,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:28,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:14:28,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:14:28,434 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:28,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:28,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:28,435 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:28,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:28,779 INFO L124 PetriNetUnfolderBase]: 1669/2571 cut-off events. [2024-06-14 12:14:28,779 INFO L125 PetriNetUnfolderBase]: For 3038/3040 co-relation queries the response was YES. [2024-06-14 12:14:28,783 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7506 conditions, 2571 events. 1669/2571 cut-off events. For 3038/3040 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12272 event pairs, 666 based on Foata normal form. 7/2577 useless extension candidates. Maximal degree in co-relation 7486. Up to 2373 conditions per place. [2024-06-14 12:14:28,792 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 62 selfloop transitions, 20 changer transitions 0/86 dead transitions. [2024-06-14 12:14:28,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 86 transitions, 527 flow [2024-06-14 12:14:28,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:28,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:28,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 12:14:28,794 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5595238095238095 [2024-06-14 12:14:28,794 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 237 flow. Second operand 6 states and 141 transitions. [2024-06-14 12:14:28,794 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 86 transitions, 527 flow [2024-06-14 12:14:28,796 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 86 transitions, 519 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-06-14 12:14:28,797 INFO L231 Difference]: Finished difference. Result has 57 places, 54 transitions, 310 flow [2024-06-14 12:14:28,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=310, PETRI_PLACES=57, PETRI_TRANSITIONS=54} [2024-06-14 12:14:28,798 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-14 12:14:28,798 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 54 transitions, 310 flow [2024-06-14 12:14:28,798 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.5) internal successors, (69), 6 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:28,798 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:28,799 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:28,799 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 12:14:28,799 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 12:14:28,799 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:28,799 INFO L85 PathProgramCache]: Analyzing trace with hash 302905255, now seen corresponding path program 1 times [2024-06-14 12:14:28,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:28,800 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816523202] [2024-06-14 12:14:28,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:28,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:28,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:29,671 INFO 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 12:14:29,671 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:29,671 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816523202] [2024-06-14 12:14:29,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816523202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:29,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:29,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:29,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055345167] [2024-06-14 12:14:29,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:29,672 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:29,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:29,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:29,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:29,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-14 12:14:29,745 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 54 transitions, 310 flow. Second operand has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:29,745 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:29,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-14 12:14:29,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:30,187 INFO L124 PetriNetUnfolderBase]: 1681/2591 cut-off events. [2024-06-14 12:14:30,187 INFO L125 PetriNetUnfolderBase]: For 4787/4789 co-relation queries the response was YES. [2024-06-14 12:14:30,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8377 conditions, 2591 events. 1681/2591 cut-off events. For 4787/4789 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12358 event pairs, 502 based on Foata normal form. 12/2602 useless extension candidates. Maximal degree in co-relation 8354. Up to 2341 conditions per place. [2024-06-14 12:14:30,201 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 66 selfloop transitions, 23 changer transitions 0/93 dead transitions. [2024-06-14 12:14:30,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 93 transitions, 628 flow [2024-06-14 12:14:30,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:30,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:30,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 12:14:30,202 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5374149659863946 [2024-06-14 12:14:30,202 INFO L175 Difference]: Start difference. First operand has 57 places, 54 transitions, 310 flow. Second operand 7 states and 158 transitions. [2024-06-14 12:14:30,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 93 transitions, 628 flow [2024-06-14 12:14:30,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 93 transitions, 579 flow, removed 7 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:30,211 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 337 flow [2024-06-14 12:14:30,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=337, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-14 12:14:30,212 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-14 12:14:30,212 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 337 flow [2024-06-14 12:14:30,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 11.428571428571429) internal successors, (80), 7 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:30,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:30,213 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:30,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 12:14:30,214 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 12:14:30,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:30,214 INFO L85 PathProgramCache]: Analyzing trace with hash -1537941434, now seen corresponding path program 1 times [2024-06-14 12:14:30,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:30,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134353862] [2024-06-14 12:14:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:30,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:30,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:30,623 INFO 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 12:14:30,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:30,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134353862] [2024-06-14 12:14:30,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134353862] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:30,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:30,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:14:30,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687304224] [2024-06-14 12:14:30,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:30,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:14:30,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:30,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:14:30,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:14:30,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:30,667 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 337 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 12:14:30,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:30,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:30,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:31,085 INFO L124 PetriNetUnfolderBase]: 1676/2580 cut-off events. [2024-06-14 12:14:31,085 INFO L125 PetriNetUnfolderBase]: For 6458/6458 co-relation queries the response was YES. [2024-06-14 12:14:31,089 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8899 conditions, 2580 events. 1676/2580 cut-off events. For 6458/6458 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12254 event pairs, 659 based on Foata normal form. 2/2581 useless extension candidates. Maximal degree in co-relation 8875. Up to 2484 conditions per place. [2024-06-14 12:14:31,099 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 55 selfloop transitions, 8 changer transitions 0/67 dead transitions. [2024-06-14 12:14:31,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 67 transitions, 491 flow [2024-06-14 12:14:31,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:31,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:31,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-06-14 12:14:31,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-14 12:14:31,100 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 337 flow. Second operand 5 states and 92 transitions. [2024-06-14 12:14:31,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 67 transitions, 491 flow [2024-06-14 12:14:31,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 67 transitions, 427 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:31,104 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 297 flow [2024-06-14 12:14:31,104 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-14 12:14:31,104 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 16 predicate places. [2024-06-14 12:14:31,104 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 297 flow [2024-06-14 12:14:31,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states 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 12:14:31,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:31,105 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:31,105 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 12:14:31,105 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 12:14:31,105 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:31,105 INFO L85 PathProgramCache]: Analyzing trace with hash -431946306, now seen corresponding path program 1 times [2024-06-14 12:14:31,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:31,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322526148] [2024-06-14 12:14:31,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:31,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:31,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:31,639 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:31,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:31,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322526148] [2024-06-14 12:14:31,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322526148] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:31,640 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:31,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:31,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [707244046] [2024-06-14 12:14:31,640 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:31,640 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:31,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:31,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:31,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:31,683 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:31,684 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 297 flow. Second operand has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:14:31,684 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:31,684 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:31,684 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:32,229 INFO L124 PetriNetUnfolderBase]: 1932/2872 cut-off events. [2024-06-14 12:14:32,230 INFO L125 PetriNetUnfolderBase]: For 8815/8815 co-relation queries the response was YES. [2024-06-14 12:14:32,234 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10015 conditions, 2872 events. 1932/2872 cut-off events. For 8815/8815 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 13027 event pairs, 727 based on Foata normal form. 6/2877 useless extension candidates. Maximal degree in co-relation 9989. Up to 2802 conditions per place. [2024-06-14 12:14:32,243 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 66 selfloop transitions, 17 changer transitions 0/86 dead transitions. [2024-06-14 12:14:32,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 86 transitions, 593 flow [2024-06-14 12:14:32,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:32,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:32,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 111 transitions. [2024-06-14 12:14:32,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:14:32,244 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 297 flow. Second operand 6 states and 111 transitions. [2024-06-14 12:14:32,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 86 transitions, 593 flow [2024-06-14 12:14:32,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 86 transitions, 571 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:32,249 INFO L231 Difference]: Finished difference. Result has 63 places, 67 transitions, 406 flow [2024-06-14 12:14:32,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=275, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=406, PETRI_PLACES=63, PETRI_TRANSITIONS=67} [2024-06-14 12:14:32,250 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 20 predicate places. [2024-06-14 12:14:32,250 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 67 transitions, 406 flow [2024-06-14 12:14:32,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.571428571428571) internal successors, (67), 7 states have internal predecessors, (67), 0 states have call successors, (0), 0 states 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 12:14:32,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:32,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:32,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 12:14:32,251 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 12:14:32,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash -1489857361, now seen corresponding path program 1 times [2024-06-14 12:14:32,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:32,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621874858] [2024-06-14 12:14:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:32,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:32,856 INFO 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 12:14:32,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:32,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621874858] [2024-06-14 12:14:32,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621874858] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:32,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:32,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:32,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095043610] [2024-06-14 12:14:32,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:32,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:32,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:32,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:32,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:32,903 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:32,904 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 67 transitions, 406 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 12:14:32,904 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:32,904 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:32,904 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:33,279 INFO L124 PetriNetUnfolderBase]: 1744/2687 cut-off events. [2024-06-14 12:14:33,279 INFO L125 PetriNetUnfolderBase]: For 10848/10862 co-relation queries the response was YES. [2024-06-14 12:14:33,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10192 conditions, 2687 events. 1744/2687 cut-off events. For 10848/10862 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12834 event pairs, 651 based on Foata normal form. 8/2679 useless extension candidates. Maximal degree in co-relation 10164. Up to 2489 conditions per place. [2024-06-14 12:14:33,295 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 64 selfloop transitions, 19 changer transitions 0/90 dead transitions. [2024-06-14 12:14:33,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 90 transitions, 672 flow [2024-06-14 12:14:33,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:33,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:33,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2024-06-14 12:14:33,297 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:14:33,297 INFO L175 Difference]: Start difference. First operand has 63 places, 67 transitions, 406 flow. Second operand 6 states and 117 transitions. [2024-06-14 12:14:33,297 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 90 transitions, 672 flow [2024-06-14 12:14:33,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 90 transitions, 654 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-06-14 12:14:33,304 INFO L231 Difference]: Finished difference. Result has 68 places, 70 transitions, 460 flow [2024-06-14 12:14:33,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=62, 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=460, PETRI_PLACES=68, PETRI_TRANSITIONS=70} [2024-06-14 12:14:33,306 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 25 predicate places. [2024-06-14 12:14:33,306 INFO L495 AbstractCegarLoop]: Abstraction has has 68 places, 70 transitions, 460 flow [2024-06-14 12:14:33,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 12:14:33,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:33,307 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:33,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 12:14:33,307 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 12:14:33,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -492927771, now seen corresponding path program 2 times [2024-06-14 12:14:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:33,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628947463] [2024-06-14 12:14:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:33,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:33,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:33,849 INFO 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 12:14:33,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:33,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628947463] [2024-06-14 12:14:33,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628947463] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:33,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:33,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:33,850 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89508488] [2024-06-14 12:14:33,850 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:33,850 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:33,850 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:33,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:33,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:33,897 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:33,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 70 transitions, 460 flow. Second operand has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 12:14:33,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:33,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:33,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:34,302 INFO L124 PetriNetUnfolderBase]: 1729/2661 cut-off events. [2024-06-14 12:14:34,302 INFO L125 PetriNetUnfolderBase]: For 12020/12030 co-relation queries the response was YES. [2024-06-14 12:14:34,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10272 conditions, 2661 events. 1729/2661 cut-off events. For 12020/12030 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 12658 event pairs, 647 based on Foata normal form. 2/2647 useless extension candidates. Maximal degree in co-relation 10241. Up to 2530 conditions per place. [2024-06-14 12:14:34,317 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 67 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-06-14 12:14:34,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 85 transitions, 654 flow [2024-06-14 12:14:34,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:34,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:34,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-14 12:14:34,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:14:34,318 INFO L175 Difference]: Start difference. First operand has 68 places, 70 transitions, 460 flow. Second operand 6 states and 108 transitions. [2024-06-14 12:14:34,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 85 transitions, 654 flow [2024-06-14 12:14:34,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 85 transitions, 625 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:34,327 INFO L231 Difference]: Finished difference. Result has 71 places, 70 transitions, 461 flow [2024-06-14 12:14:34,327 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=431, PETRI_DIFFERENCE_MINUEND_PLACES=65, 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=461, PETRI_PLACES=71, PETRI_TRANSITIONS=70} [2024-06-14 12:14:34,328 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 28 predicate places. [2024-06-14 12:14:34,328 INFO L495 AbstractCegarLoop]: Abstraction has has 71 places, 70 transitions, 461 flow [2024-06-14 12:14:34,328 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.571428571428571) internal successors, (74), 7 states have internal predecessors, (74), 0 states have call successors, (0), 0 states 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 12:14:34,328 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:34,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:34,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 12:14:34,329 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 12:14:34,329 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:34,329 INFO L85 PathProgramCache]: Analyzing trace with hash -1241334843, now seen corresponding path program 1 times [2024-06-14 12:14:34,329 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:34,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690981596] [2024-06-14 12:14:34,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:34,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:34,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:35,009 INFO 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 12:14:35,009 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:35,009 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690981596] [2024-06-14 12:14:35,009 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690981596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:35,009 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:35,009 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:35,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893075493] [2024-06-14 12:14:35,009 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:35,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:35,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:35,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:35,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:35,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:35,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 70 transitions, 461 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:14:35,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:35,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:35,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:35,539 INFO L124 PetriNetUnfolderBase]: 2091/3095 cut-off events. [2024-06-14 12:14:35,539 INFO L125 PetriNetUnfolderBase]: For 17156/17160 co-relation queries the response was YES. [2024-06-14 12:14:35,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12369 conditions, 3095 events. 2091/3095 cut-off events. For 17156/17160 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 14165 event pairs, 644 based on Foata normal form. 13/3107 useless extension candidates. Maximal degree in co-relation 12337. Up to 2721 conditions per place. [2024-06-14 12:14:35,555 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 88 selfloop transitions, 31 changer transitions 0/122 dead transitions. [2024-06-14 12:14:35,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 122 transitions, 989 flow [2024-06-14 12:14:35,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:35,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:35,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 140 transitions. [2024-06-14 12:14:35,557 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47619047619047616 [2024-06-14 12:14:35,557 INFO L175 Difference]: Start difference. First operand has 71 places, 70 transitions, 461 flow. Second operand 7 states and 140 transitions. [2024-06-14 12:14:35,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 122 transitions, 989 flow [2024-06-14 12:14:35,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 122 transitions, 942 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:35,569 INFO L231 Difference]: Finished difference. Result has 75 places, 89 transitions, 662 flow [2024-06-14 12:14:35,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=414, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=662, PETRI_PLACES=75, PETRI_TRANSITIONS=89} [2024-06-14 12:14:35,569 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 32 predicate places. [2024-06-14 12:14:35,569 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 89 transitions, 662 flow [2024-06-14 12:14:35,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:14:35,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:35,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:35,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 12:14:35,570 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 12:14:35,570 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:35,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1905365905, now seen corresponding path program 2 times [2024-06-14 12:14:35,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:35,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363640123] [2024-06-14 12:14:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:35,571 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:35,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:36,193 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:36,193 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:36,194 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363640123] [2024-06-14 12:14:36,194 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363640123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:36,194 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:36,194 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:36,194 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295204307] [2024-06-14 12:14:36,194 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:36,194 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:36,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:36,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:36,195 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:36,251 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:36,251 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 89 transitions, 662 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:14:36,251 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:36,251 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:36,251 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:36,736 INFO L124 PetriNetUnfolderBase]: 2127/3146 cut-off events. [2024-06-14 12:14:36,736 INFO L125 PetriNetUnfolderBase]: For 22973/22973 co-relation queries the response was YES. [2024-06-14 12:14:36,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14509 conditions, 3146 events. 2127/3146 cut-off events. For 22973/22973 co-relation queries the response was YES. Maximal size of possible extension queue 133. Compared 14362 event pairs, 695 based on Foata normal form. 6/3151 useless extension candidates. Maximal degree in co-relation 14473. Up to 3007 conditions per place. [2024-06-14 12:14:36,752 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 98 selfloop transitions, 23 changer transitions 0/124 dead transitions. [2024-06-14 12:14:36,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 124 transitions, 1146 flow [2024-06-14 12:14:36,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:36,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:36,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 130 transitions. [2024-06-14 12:14:36,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4421768707482993 [2024-06-14 12:14:36,753 INFO L175 Difference]: Start difference. First operand has 75 places, 89 transitions, 662 flow. Second operand 7 states and 130 transitions. [2024-06-14 12:14:36,754 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 124 transitions, 1146 flow [2024-06-14 12:14:36,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 124 transitions, 1102 flow, removed 21 selfloop flow, removed 1 redundant places. [2024-06-14 12:14:36,768 INFO L231 Difference]: Finished difference. Result has 82 places, 97 transitions, 770 flow [2024-06-14 12:14:36,768 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=626, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=770, PETRI_PLACES=82, PETRI_TRANSITIONS=97} [2024-06-14 12:14:36,768 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 39 predicate places. [2024-06-14 12:14:36,768 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 97 transitions, 770 flow [2024-06-14 12:14:36,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:14:36,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:36,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:36,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 12:14:36,769 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 12:14:36,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:36,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1063966173, now seen corresponding path program 3 times [2024-06-14 12:14:36,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:36,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168386281] [2024-06-14 12:14:36,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:36,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:37,352 INFO 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 12:14:37,352 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:37,352 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168386281] [2024-06-14 12:14:37,352 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168386281] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:37,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:37,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:37,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097977549] [2024-06-14 12:14:37,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:37,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:37,353 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:37,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:37,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:37,409 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:37,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 97 transitions, 770 flow. Second operand has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:14:37,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:37,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:37,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:37,951 INFO L124 PetriNetUnfolderBase]: 2131/3152 cut-off events. [2024-06-14 12:14:37,951 INFO L125 PetriNetUnfolderBase]: For 27428/27428 co-relation queries the response was YES. [2024-06-14 12:14:37,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15157 conditions, 3152 events. 2131/3152 cut-off events. For 27428/27428 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14413 event pairs, 689 based on Foata normal form. 6/3157 useless extension candidates. Maximal degree in co-relation 15117. Up to 3076 conditions per place. [2024-06-14 12:14:37,966 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 101 selfloop transitions, 21 changer transitions 0/125 dead transitions. [2024-06-14 12:14:37,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 125 transitions, 1174 flow [2024-06-14 12:14:37,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:37,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:37,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 12:14:37,968 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:14:37,968 INFO L175 Difference]: Start difference. First operand has 82 places, 97 transitions, 770 flow. Second operand 7 states and 126 transitions. [2024-06-14 12:14:37,968 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 125 transitions, 1174 flow [2024-06-14 12:14:37,983 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 1125 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:37,985 INFO L231 Difference]: Finished difference. Result has 87 places, 103 transitions, 848 flow [2024-06-14 12:14:37,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=724, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=97, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=848, PETRI_PLACES=87, PETRI_TRANSITIONS=103} [2024-06-14 12:14:37,985 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 44 predicate places. [2024-06-14 12:14:37,985 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 103 transitions, 848 flow [2024-06-14 12:14:37,986 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.5) internal successors, (76), 8 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 12:14:37,986 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:37,986 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:37,986 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 12:14:37,986 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 12:14:37,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:37,986 INFO L85 PathProgramCache]: Analyzing trace with hash 1511477053, now seen corresponding path program 1 times [2024-06-14 12:14:37,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:37,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043136622] [2024-06-14 12:14:37,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:37,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:37,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:38,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:38,836 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:38,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043136622] [2024-06-14 12:14:38,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043136622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:38,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:38,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:38,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140515052] [2024-06-14 12:14:38,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:38,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:38,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:38,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:38,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:38,930 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:38,931 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 103 transitions, 848 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:14:38,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:38,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:38,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:39,534 INFO L124 PetriNetUnfolderBase]: 2134/3157 cut-off events. [2024-06-14 12:14:39,534 INFO L125 PetriNetUnfolderBase]: For 30219/30219 co-relation queries the response was YES. [2024-06-14 12:14:39,541 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15528 conditions, 3157 events. 2134/3157 cut-off events. For 30219/30219 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14414 event pairs, 668 based on Foata normal form. 6/3162 useless extension candidates. Maximal degree in co-relation 15486. Up to 3061 conditions per place. [2024-06-14 12:14:39,551 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 25 changer transitions 0/128 dead transitions. [2024-06-14 12:14:39,551 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 128 transitions, 1232 flow [2024-06-14 12:14:39,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:39,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:39,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:14:39,552 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 12:14:39,552 INFO L175 Difference]: Start difference. First operand has 87 places, 103 transitions, 848 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:14:39,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 128 transitions, 1232 flow [2024-06-14 12:14:39,570 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 128 transitions, 1179 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:39,571 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 891 flow [2024-06-14 12:14:39,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=795, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=891, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-14 12:14:39,572 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-14 12:14:39,572 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 891 flow [2024-06-14 12:14:39,572 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:14:39,572 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:39,573 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:39,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 12:14:39,573 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:39,573 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:39,573 INFO L85 PathProgramCache]: Analyzing trace with hash -2050156111, now seen corresponding path program 1 times [2024-06-14 12:14:39,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:39,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538909058] [2024-06-14 12:14:39,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:39,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:39,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:40,048 INFO 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 12:14:40,049 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:40,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538909058] [2024-06-14 12:14:40,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538909058] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:40,049 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:40,049 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 12:14:40,049 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412095362] [2024-06-14 12:14:40,049 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:40,049 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 12:14:40,049 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:40,050 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 12:14:40,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-06-14 12:14:40,077 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:40,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 891 flow. Second operand has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:40,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:40,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:40,078 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:40,570 INFO L124 PetriNetUnfolderBase]: 2131/3153 cut-off events. [2024-06-14 12:14:40,571 INFO L125 PetriNetUnfolderBase]: For 32999/32999 co-relation queries the response was YES. [2024-06-14 12:14:40,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15973 conditions, 3153 events. 2131/3153 cut-off events. For 32999/32999 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 14377 event pairs, 692 based on Foata normal form. 1/3153 useless extension candidates. Maximal degree in co-relation 15930. Up to 3137 conditions per place. [2024-06-14 12:14:40,586 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 103 selfloop transitions, 8 changer transitions 0/114 dead transitions. [2024-06-14 12:14:40,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 114 transitions, 1133 flow [2024-06-14 12:14:40,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 12:14:40,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 12:14:40,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-14 12:14:40,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 12:14:40,587 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 891 flow. Second operand 5 states and 84 transitions. [2024-06-14 12:14:40,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 114 transitions, 1133 flow [2024-06-14 12:14:40,605 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 114 transitions, 1053 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:40,606 INFO L231 Difference]: Finished difference. Result has 90 places, 106 transitions, 833 flow [2024-06-14 12:14:40,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=833, PETRI_PLACES=90, PETRI_TRANSITIONS=106} [2024-06-14 12:14:40,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 47 predicate places. [2024-06-14 12:14:40,607 INFO L495 AbstractCegarLoop]: Abstraction has has 90 places, 106 transitions, 833 flow [2024-06-14 12:14:40,607 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.166666666666666) internal successors, (61), 6 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:14:40,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:40,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:40,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 12:14:40,608 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 12:14:40,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:40,608 INFO L85 PathProgramCache]: Analyzing trace with hash 169511842, now seen corresponding path program 1 times [2024-06-14 12:14:40,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:40,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [424785256] [2024-06-14 12:14:40,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:40,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:40,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:41,413 INFO 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 12:14:41,414 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:41,414 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [424785256] [2024-06-14 12:14:41,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [424785256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:41,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:41,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:41,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104644438] [2024-06-14 12:14:41,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:41,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:41,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:41,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:41,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:41,482 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:41,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 106 transitions, 833 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 12:14:41,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:41,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:41,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:41,995 INFO L124 PetriNetUnfolderBase]: 2008/3036 cut-off events. [2024-06-14 12:14:41,996 INFO L125 PetriNetUnfolderBase]: For 35237/35273 co-relation queries the response was YES. [2024-06-14 12:14:42,004 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15404 conditions, 3036 events. 2008/3036 cut-off events. For 35237/35273 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14369 event pairs, 607 based on Foata normal form. 14/3029 useless extension candidates. Maximal degree in co-relation 15360. Up to 2758 conditions per place. [2024-06-14 12:14:42,014 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 97 selfloop transitions, 26 changer transitions 0/139 dead transitions. [2024-06-14 12:14:42,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 139 transitions, 1281 flow [2024-06-14 12:14:42,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:42,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:42,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 12:14:42,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46258503401360546 [2024-06-14 12:14:42,015 INFO L175 Difference]: Start difference. First operand has 90 places, 106 transitions, 833 flow. Second operand 7 states and 136 transitions. [2024-06-14 12:14:42,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 139 transitions, 1281 flow [2024-06-14 12:14:42,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 139 transitions, 1257 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:42,042 INFO L231 Difference]: Finished difference. Result has 93 places, 112 transitions, 955 flow [2024-06-14 12:14:42,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=955, PETRI_PLACES=93, PETRI_TRANSITIONS=112} [2024-06-14 12:14:42,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 50 predicate places. [2024-06-14 12:14:42,042 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 112 transitions, 955 flow [2024-06-14 12:14:42,043 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 12:14:42,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:42,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:42,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 12:14:42,043 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 12:14:42,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:42,043 INFO L85 PathProgramCache]: Analyzing trace with hash 169602052, now seen corresponding path program 2 times [2024-06-14 12:14:42,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:42,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668360083] [2024-06-14 12:14:42,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:42,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:42,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:42,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:42,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:42,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668360083] [2024-06-14 12:14:42,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668360083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:42,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:42,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:42,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999381012] [2024-06-14 12:14:42,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:42,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:42,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:42,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:42,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:42,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:42,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 112 transitions, 955 flow. Second operand has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 12:14:42,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:42,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:42,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:43,399 INFO L124 PetriNetUnfolderBase]: 2003/3029 cut-off events. [2024-06-14 12:14:43,399 INFO L125 PetriNetUnfolderBase]: For 39897/39933 co-relation queries the response was YES. [2024-06-14 12:14:43,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15999 conditions, 3029 events. 2003/3029 cut-off events. For 39897/39933 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14306 event pairs, 607 based on Foata normal form. 14/3022 useless extension candidates. Maximal degree in co-relation 15955. Up to 2786 conditions per place. [2024-06-14 12:14:43,417 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 96 selfloop transitions, 22 changer transitions 0/134 dead transitions. [2024-06-14 12:14:43,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 134 transitions, 1247 flow [2024-06-14 12:14:43,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:43,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:43,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-06-14 12:14:43,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.445578231292517 [2024-06-14 12:14:43,419 INFO L175 Difference]: Start difference. First operand has 93 places, 112 transitions, 955 flow. Second operand 7 states and 131 transitions. [2024-06-14 12:14:43,419 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 134 transitions, 1247 flow [2024-06-14 12:14:43,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1166 flow, removed 31 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:43,450 INFO L231 Difference]: Finished difference. Result has 97 places, 112 transitions, 926 flow [2024-06-14 12:14:43,450 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=874, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=926, PETRI_PLACES=97, PETRI_TRANSITIONS=112} [2024-06-14 12:14:43,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-14 12:14:43,451 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 112 transitions, 926 flow [2024-06-14 12:14:43,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.625) internal successors, (85), 8 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 12:14:43,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:43,451 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:43,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 12:14:43,451 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 12:14:43,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:43,452 INFO L85 PathProgramCache]: Analyzing trace with hash -1528771735, now seen corresponding path program 1 times [2024-06-14 12:14:43,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:43,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1987407073] [2024-06-14 12:14:43,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:43,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:43,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:44,081 INFO 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 12:14:44,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:44,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1987407073] [2024-06-14 12:14:44,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1987407073] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:44,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:44,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:44,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092768240] [2024-06-14 12:14:44,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:44,083 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:44,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:44,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:44,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:44,143 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:44,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 112 transitions, 926 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 12:14:44,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:44,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:44,144 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:44,612 INFO L124 PetriNetUnfolderBase]: 2173/3215 cut-off events. [2024-06-14 12:14:44,612 INFO L125 PetriNetUnfolderBase]: For 45850/45856 co-relation queries the response was YES. [2024-06-14 12:14:44,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17293 conditions, 3215 events. 2173/3215 cut-off events. For 45850/45856 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14749 event pairs, 638 based on Foata normal form. 8/3222 useless extension candidates. Maximal degree in co-relation 17247. Up to 2785 conditions per place. [2024-06-14 12:14:44,628 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 103 selfloop transitions, 47 changer transitions 0/153 dead transitions. [2024-06-14 12:14:44,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 153 transitions, 1556 flow [2024-06-14 12:14:44,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:44,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:44,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 142 transitions. [2024-06-14 12:14:44,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.48299319727891155 [2024-06-14 12:14:44,629 INFO L175 Difference]: Start difference. First operand has 97 places, 112 transitions, 926 flow. Second operand 7 states and 142 transitions. [2024-06-14 12:14:44,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 153 transitions, 1556 flow [2024-06-14 12:14:44,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 153 transitions, 1501 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:44,657 INFO L231 Difference]: Finished difference. Result has 100 places, 120 transitions, 1127 flow [2024-06-14 12:14:44,657 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=871, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1127, PETRI_PLACES=100, PETRI_TRANSITIONS=120} [2024-06-14 12:14:44,657 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 57 predicate places. [2024-06-14 12:14:44,657 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 120 transitions, 1127 flow [2024-06-14 12:14:44,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 12:14:44,658 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:44,658 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:44,658 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 12:14:44,658 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 12:14:44,658 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:44,658 INFO L85 PathProgramCache]: Analyzing trace with hash 173326857, now seen corresponding path program 2 times [2024-06-14 12:14:44,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:44,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422893524] [2024-06-14 12:14:44,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:44,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:44,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:45,286 INFO 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 12:14:45,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:45,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422893524] [2024-06-14 12:14:45,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422893524] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:45,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:45,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:45,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198812861] [2024-06-14 12:14:45,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:45,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:45,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:45,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:45,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:45,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:45,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 120 transitions, 1127 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 12:14:45,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:45,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:45,353 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:45,820 INFO L124 PetriNetUnfolderBase]: 2209/3267 cut-off events. [2024-06-14 12:14:45,820 INFO L125 PetriNetUnfolderBase]: For 53332/53338 co-relation queries the response was YES. [2024-06-14 12:14:45,829 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18752 conditions, 3267 events. 2209/3267 cut-off events. For 53332/53338 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 15022 event pairs, 634 based on Foata normal form. 8/3274 useless extension candidates. Maximal degree in co-relation 18703. Up to 2815 conditions per place. [2024-06-14 12:14:45,840 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 102 selfloop transitions, 48 changer transitions 0/153 dead transitions. [2024-06-14 12:14:45,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 1683 flow [2024-06-14 12:14:45,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:45,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:45,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 12:14:45,841 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46598639455782315 [2024-06-14 12:14:45,841 INFO L175 Difference]: Start difference. First operand has 100 places, 120 transitions, 1127 flow. Second operand 7 states and 137 transitions. [2024-06-14 12:14:45,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 1683 flow [2024-06-14 12:14:45,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 153 transitions, 1596 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 12:14:45,880 INFO L231 Difference]: Finished difference. Result has 104 places, 124 transitions, 1204 flow [2024-06-14 12:14:45,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1047, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=120, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1204, PETRI_PLACES=104, PETRI_TRANSITIONS=124} [2024-06-14 12:14:45,880 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 61 predicate places. [2024-06-14 12:14:45,880 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 124 transitions, 1204 flow [2024-06-14 12:14:45,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 12:14:45,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:45,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:45,881 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 12:14:45,881 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 12:14:45,881 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:45,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1249785523, now seen corresponding path program 3 times [2024-06-14 12:14:45,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:45,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910820863] [2024-06-14 12:14:45,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:45,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:45,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:46,445 INFO 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 12:14:46,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:46,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910820863] [2024-06-14 12:14:46,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910820863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:46,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:46,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:14:46,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296587172] [2024-06-14 12:14:46,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:46,445 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:14:46,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:46,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:14:46,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:14:46,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:46,523 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 124 transitions, 1204 flow. Second operand has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 12:14:46,523 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:46,523 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:46,523 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:47,051 INFO L124 PetriNetUnfolderBase]: 2213/3273 cut-off events. [2024-06-14 12:14:47,051 INFO L125 PetriNetUnfolderBase]: For 57472/57478 co-relation queries the response was YES. [2024-06-14 12:14:47,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18949 conditions, 3273 events. 2213/3273 cut-off events. For 57472/57478 co-relation queries the response was YES. Maximal size of possible extension queue 138. Compared 14980 event pairs, 680 based on Foata normal form. 12/3284 useless extension candidates. Maximal degree in co-relation 18899. Up to 3164 conditions per place. [2024-06-14 12:14:47,069 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 124 selfloop transitions, 23 changer transitions 0/150 dead transitions. [2024-06-14 12:14:47,069 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 150 transitions, 1649 flow [2024-06-14 12:14:47,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:47,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:47,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:14:47,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 12:14:47,071 INFO L175 Difference]: Start difference. First operand has 104 places, 124 transitions, 1204 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:14:47,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 150 transitions, 1649 flow [2024-06-14 12:14:47,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 150 transitions, 1558 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:47,110 INFO L231 Difference]: Finished difference. Result has 107 places, 128 transitions, 1233 flow [2024-06-14 12:14:47,110 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1116, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1233, PETRI_PLACES=107, PETRI_TRANSITIONS=128} [2024-06-14 12:14:47,111 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 64 predicate places. [2024-06-14 12:14:47,111 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 128 transitions, 1233 flow [2024-06-14 12:14:47,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.625) internal successors, (77), 8 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 12:14:47,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:47,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:47,111 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 12:14:47,111 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 12:14:47,112 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:47,112 INFO L85 PathProgramCache]: Analyzing trace with hash -1249518396, now seen corresponding path program 1 times [2024-06-14 12:14:47,112 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:47,112 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085613846] [2024-06-14 12:14:47,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:47,112 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:47,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:47,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:47,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:47,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085613846] [2024-06-14 12:14:47,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085613846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:47,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:47,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:47,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695050867] [2024-06-14 12:14:47,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:47,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:47,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:47,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:47,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:47,942 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:47,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 128 transitions, 1233 flow. Second operand has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:14:47,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:47,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:47,942 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:48,516 INFO L124 PetriNetUnfolderBase]: 2215/3275 cut-off events. [2024-06-14 12:14:48,516 INFO L125 PetriNetUnfolderBase]: For 61668/61668 co-relation queries the response was YES. [2024-06-14 12:14:48,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19060 conditions, 3275 events. 2215/3275 cut-off events. For 61668/61668 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15056 event pairs, 667 based on Foata normal form. 3/3277 useless extension candidates. Maximal degree in co-relation 19009. Up to 3168 conditions per place. [2024-06-14 12:14:48,537 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 120 selfloop transitions, 30 changer transitions 0/153 dead transitions. [2024-06-14 12:14:48,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 153 transitions, 1681 flow [2024-06-14 12:14:48,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:14:48,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:14:48,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-14 12:14:48,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-14 12:14:48,538 INFO L175 Difference]: Start difference. First operand has 107 places, 128 transitions, 1233 flow. Second operand 7 states and 127 transitions. [2024-06-14 12:14:48,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 153 transitions, 1681 flow [2024-06-14 12:14:48,584 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 1612 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:48,586 INFO L231 Difference]: Finished difference. Result has 109 places, 132 transitions, 1302 flow [2024-06-14 12:14:48,586 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1302, PETRI_PLACES=109, PETRI_TRANSITIONS=132} [2024-06-14 12:14:48,587 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 66 predicate places. [2024-06-14 12:14:48,587 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 132 transitions, 1302 flow [2024-06-14 12:14:48,587 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.444444444444445) internal successors, (85), 9 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 12:14:48,587 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:48,587 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:48,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 12:14:48,587 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:14:48,588 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:48,588 INFO L85 PathProgramCache]: Analyzing trace with hash 869671367, now seen corresponding path program 1 times [2024-06-14 12:14:48,588 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:48,588 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139804360] [2024-06-14 12:14:48,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:48,588 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:48,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:49,126 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 12:14:49,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:49,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139804360] [2024-06-14 12:14:49,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139804360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:49,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:49,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:14:49,127 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265369126] [2024-06-14 12:14:49,127 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:49,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:14:49,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:49,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:14:49,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:14:49,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:49,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 132 transitions, 1302 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:14:49,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:49,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:49,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:49,773 INFO L124 PetriNetUnfolderBase]: 2206/3263 cut-off events. [2024-06-14 12:14:49,773 INFO L125 PetriNetUnfolderBase]: For 66050/66050 co-relation queries the response was YES. [2024-06-14 12:14:49,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19605 conditions, 3263 events. 2206/3263 cut-off events. For 66050/66050 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 14873 event pairs, 674 based on Foata normal form. 3/3265 useless extension candidates. Maximal degree in co-relation 19553. Up to 3238 conditions per place. [2024-06-14 12:14:49,789 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 132 selfloop transitions, 11 changer transitions 0/146 dead transitions. [2024-06-14 12:14:49,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 146 transitions, 1640 flow [2024-06-14 12:14:49,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:14:49,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:14:49,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 12:14:49,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-06-14 12:14:49,790 INFO L175 Difference]: Start difference. First operand has 109 places, 132 transitions, 1302 flow. Second operand 6 states and 98 transitions. [2024-06-14 12:14:49,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 146 transitions, 1640 flow [2024-06-14 12:14:49,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 146 transitions, 1552 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-14 12:14:49,829 INFO L231 Difference]: Finished difference. Result has 110 places, 135 transitions, 1274 flow [2024-06-14 12:14:49,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1214, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=132, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1274, PETRI_PLACES=110, PETRI_TRANSITIONS=135} [2024-06-14 12:14:49,829 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 67 predicate places. [2024-06-14 12:14:49,829 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 135 transitions, 1274 flow [2024-06-14 12:14:49,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:14:49,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:49,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:49,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 12:14:49,829 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 12:14:49,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:49,830 INFO L85 PathProgramCache]: Analyzing trace with hash -265435076, now seen corresponding path program 1 times [2024-06-14 12:14:49,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:49,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1298467106] [2024-06-14 12:14:49,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:49,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:49,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:50,695 INFO 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 12:14:50,696 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:50,696 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1298467106] [2024-06-14 12:14:50,696 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1298467106] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:50,696 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:50,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:50,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887263015] [2024-06-14 12:14:50,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:50,697 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:50,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:50,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:50,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:50,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:50,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 135 transitions, 1274 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 12:14:50,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:50,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:50,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:51,315 INFO L124 PetriNetUnfolderBase]: 2088/3154 cut-off events. [2024-06-14 12:14:51,316 INFO L125 PetriNetUnfolderBase]: For 69248/69299 co-relation queries the response was YES. [2024-06-14 12:14:51,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19305 conditions, 3154 events. 2088/3154 cut-off events. For 69248/69299 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15012 event pairs, 452 based on Foata normal form. 15/3149 useless extension candidates. Maximal degree in co-relation 19252. Up to 2758 conditions per place. [2024-06-14 12:14:51,337 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 119 selfloop transitions, 32 changer transitions 0/172 dead transitions. [2024-06-14 12:14:51,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 172 transitions, 1838 flow [2024-06-14 12:14:51,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:51,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:51,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:14:51,338 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 12:14:51,338 INFO L175 Difference]: Start difference. First operand has 110 places, 135 transitions, 1274 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:14:51,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 172 transitions, 1838 flow [2024-06-14 12:14:51,380 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 172 transitions, 1800 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:51,382 INFO L231 Difference]: Finished difference. Result has 114 places, 139 transitions, 1411 flow [2024-06-14 12:14:51,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1236, PETRI_DIFFERENCE_MINUEND_PLACES=106, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1411, PETRI_PLACES=114, PETRI_TRANSITIONS=139} [2024-06-14 12:14:51,382 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 71 predicate places. [2024-06-14 12:14:51,382 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 139 transitions, 1411 flow [2024-06-14 12:14:51,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 12:14:51,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:51,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:51,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 12:14:51,383 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 12:14:51,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:51,383 INFO L85 PathProgramCache]: Analyzing trace with hash 398092878, now seen corresponding path program 1 times [2024-06-14 12:14:51,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:51,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881426548] [2024-06-14 12:14:51,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:51,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:51,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:52,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:14:52,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:52,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881426548] [2024-06-14 12:14:52,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881426548] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:52,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:52,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:52,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146914369] [2024-06-14 12:14:52,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:52,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:52,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:52,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:52,131 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:52,204 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:52,204 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 139 transitions, 1411 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:14:52,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:52,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:52,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:52,763 INFO L124 PetriNetUnfolderBase]: 2283/3376 cut-off events. [2024-06-14 12:14:52,763 INFO L125 PetriNetUnfolderBase]: For 79996/80002 co-relation queries the response was YES. [2024-06-14 12:14:52,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21180 conditions, 3376 events. 2283/3376 cut-off events. For 79996/80002 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 15721 event pairs, 521 based on Foata normal form. 8/3383 useless extension candidates. Maximal degree in co-relation 21126. Up to 2629 conditions per place. [2024-06-14 12:14:52,782 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 129 selfloop transitions, 65 changer transitions 0/197 dead transitions. [2024-06-14 12:14:52,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 197 transitions, 2427 flow [2024-06-14 12:14:52,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:52,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:52,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 163 transitions. [2024-06-14 12:14:52,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4851190476190476 [2024-06-14 12:14:52,783 INFO L175 Difference]: Start difference. First operand has 114 places, 139 transitions, 1411 flow. Second operand 8 states and 163 transitions. [2024-06-14 12:14:52,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 197 transitions, 2427 flow [2024-06-14 12:14:52,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 197 transitions, 2335 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-14 12:14:52,838 INFO L231 Difference]: Finished difference. Result has 121 places, 154 transitions, 1705 flow [2024-06-14 12:14:52,839 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1705, PETRI_PLACES=121, PETRI_TRANSITIONS=154} [2024-06-14 12:14:52,840 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 78 predicate places. [2024-06-14 12:14:52,840 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 154 transitions, 1705 flow [2024-06-14 12:14:52,840 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:14:52,840 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:52,840 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:52,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 12:14:52,840 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 12:14:52,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:52,841 INFO L85 PathProgramCache]: Analyzing trace with hash 959901194, now seen corresponding path program 2 times [2024-06-14 12:14:52,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:52,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575298210] [2024-06-14 12:14:52,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:52,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:52,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:53,637 INFO 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 12:14:53,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:53,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575298210] [2024-06-14 12:14:53,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575298210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:53,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:53,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:53,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505984378] [2024-06-14 12:14:53,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:53,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:53,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:53,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:53,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:53,757 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:53,757 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 154 transitions, 1705 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 12:14:53,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:53,758 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:53,758 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:54,330 INFO L124 PetriNetUnfolderBase]: 2186/3287 cut-off events. [2024-06-14 12:14:54,330 INFO L125 PetriNetUnfolderBase]: For 87748/87800 co-relation queries the response was YES. [2024-06-14 12:14:54,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22033 conditions, 3287 events. 2186/3287 cut-off events. For 87748/87800 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 15689 event pairs, 563 based on Foata normal form. 16/3283 useless extension candidates. Maximal degree in co-relation 21974. Up to 2961 conditions per place. [2024-06-14 12:14:54,352 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 133 selfloop transitions, 28 changer transitions 0/186 dead transitions. [2024-06-14 12:14:54,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 186 transitions, 2141 flow [2024-06-14 12:14:54,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:54,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2024-06-14 12:14:54,354 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44642857142857145 [2024-06-14 12:14:54,354 INFO L175 Difference]: Start difference. First operand has 121 places, 154 transitions, 1705 flow. Second operand 8 states and 150 transitions. [2024-06-14 12:14:54,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 186 transitions, 2141 flow [2024-06-14 12:14:54,409 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 2040 flow, removed 42 selfloop flow, removed 2 redundant places. [2024-06-14 12:14:54,411 INFO L231 Difference]: Finished difference. Result has 127 places, 156 transitions, 1709 flow [2024-06-14 12:14:54,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=127, PETRI_TRANSITIONS=156} [2024-06-14 12:14:54,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-14 12:14:54,412 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 156 transitions, 1709 flow [2024-06-14 12:14:54,412 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 12:14:54,412 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:54,412 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:54,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 12:14:54,413 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 12:14:54,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:54,413 INFO L85 PathProgramCache]: Analyzing trace with hash 1073524998, now seen corresponding path program 2 times [2024-06-14 12:14:54,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:54,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188840378] [2024-06-14 12:14:54,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:54,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:54,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:55,236 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 12:14:55,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:55,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188840378] [2024-06-14 12:14:55,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188840378] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:55,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:55,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:55,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882954134] [2024-06-14 12:14:55,237 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:55,237 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:55,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:55,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:55,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:55,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:55,329 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 156 transitions, 1709 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:14:55,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:55,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:55,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:55,878 INFO L124 PetriNetUnfolderBase]: 2336/3455 cut-off events. [2024-06-14 12:14:55,878 INFO L125 PetriNetUnfolderBase]: For 96676/96682 co-relation queries the response was YES. [2024-06-14 12:14:55,890 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23370 conditions, 3455 events. 2336/3455 cut-off events. For 96676/96682 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 16123 event pairs, 549 based on Foata normal form. 8/3462 useless extension candidates. Maximal degree in co-relation 23309. Up to 2972 conditions per place. [2024-06-14 12:14:55,901 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 137 selfloop transitions, 53 changer transitions 0/193 dead transitions. [2024-06-14 12:14:55,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 193 transitions, 2382 flow [2024-06-14 12:14:55,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:55,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:55,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:14:55,903 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:14:55,903 INFO L175 Difference]: Start difference. First operand has 127 places, 156 transitions, 1709 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:14:55,903 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 193 transitions, 2382 flow [2024-06-14 12:14:55,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 193 transitions, 2299 flow, removed 15 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:55,976 INFO L231 Difference]: Finished difference. Result has 129 places, 160 transitions, 1810 flow [2024-06-14 12:14:55,977 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1626, PETRI_DIFFERENCE_MINUEND_PLACES=121, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1810, PETRI_PLACES=129, PETRI_TRANSITIONS=160} [2024-06-14 12:14:55,977 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 86 predicate places. [2024-06-14 12:14:55,977 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 160 transitions, 1810 flow [2024-06-14 12:14:55,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:14:55,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:55,978 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:55,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 12:14:55,978 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 12:14:55,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:55,978 INFO L85 PathProgramCache]: Analyzing trace with hash 962697704, now seen corresponding path program 3 times [2024-06-14 12:14:55,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:55,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485025807] [2024-06-14 12:14:55,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:55,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:55,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:56,793 INFO 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 12:14:56,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:56,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485025807] [2024-06-14 12:14:56,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485025807] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:56,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:56,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:56,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207438166] [2024-06-14 12:14:56,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:56,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:56,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:56,795 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:56,795 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:56,893 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-14 12:14:56,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 160 transitions, 1810 flow. Second operand has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 12:14:56,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:56,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-14 12:14:56,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:57,477 INFO L124 PetriNetUnfolderBase]: 2214/3327 cut-off events. [2024-06-14 12:14:57,477 INFO L125 PetriNetUnfolderBase]: For 99636/99688 co-relation queries the response was YES. [2024-06-14 12:14:57,533 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22908 conditions, 3327 events. 2214/3327 cut-off events. For 99636/99688 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15894 event pairs, 562 based on Foata normal form. 16/3323 useless extension candidates. Maximal degree in co-relation 22846. Up to 3028 conditions per place. [2024-06-14 12:14:57,546 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 137 selfloop transitions, 24 changer transitions 0/187 dead transitions. [2024-06-14 12:14:57,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 187 transitions, 2200 flow [2024-06-14 12:14:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:14:57,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:14:57,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 12:14:57,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-14 12:14:57,548 INFO L175 Difference]: Start difference. First operand has 129 places, 160 transitions, 1810 flow. Second operand 8 states and 147 transitions. [2024-06-14 12:14:57,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 187 transitions, 2200 flow [2024-06-14 12:14:57,634 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 187 transitions, 2029 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 12:14:57,636 INFO L231 Difference]: Finished difference. Result has 131 places, 160 transitions, 1694 flow [2024-06-14 12:14:57,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1694, PETRI_PLACES=131, PETRI_TRANSITIONS=160} [2024-06-14 12:14:57,636 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 88 predicate places. [2024-06-14 12:14:57,636 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 160 transitions, 1694 flow [2024-06-14 12:14:57,637 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 10.555555555555555) internal successors, (95), 9 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 12:14:57,637 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:57,637 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:57,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 12:14:57,637 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 12:14:57,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:57,637 INFO L85 PathProgramCache]: Analyzing trace with hash -262577992, now seen corresponding path program 3 times [2024-06-14 12:14:57,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:57,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905057941] [2024-06-14 12:14:57,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:57,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:57,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:14:58,537 INFO 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 12:14:58,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:14:58,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905057941] [2024-06-14 12:14:58,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905057941] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:14:58,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:14:58,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:14:58,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1858196367] [2024-06-14 12:14:58,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:14:58,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:14:58,538 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:14:58,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:14:58,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:14:58,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:14:58,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 160 transitions, 1694 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:14:58,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:14:58,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:14:58,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:14:59,280 INFO L124 PetriNetUnfolderBase]: 2388/3528 cut-off events. [2024-06-14 12:14:59,280 INFO L125 PetriNetUnfolderBase]: For 109129/109135 co-relation queries the response was YES. [2024-06-14 12:14:59,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24227 conditions, 3528 events. 2388/3528 cut-off events. For 109129/109135 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16489 event pairs, 552 based on Foata normal form. 8/3535 useless extension candidates. Maximal degree in co-relation 24164. Up to 2982 conditions per place. [2024-06-14 12:14:59,306 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 141 selfloop transitions, 63 changer transitions 0/207 dead transitions. [2024-06-14 12:14:59,306 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 207 transitions, 2536 flow [2024-06-14 12:14:59,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:14:59,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:14:59,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 175 transitions. [2024-06-14 12:14:59,317 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46296296296296297 [2024-06-14 12:14:59,317 INFO L175 Difference]: Start difference. First operand has 131 places, 160 transitions, 1694 flow. Second operand 9 states and 175 transitions. [2024-06-14 12:14:59,317 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 207 transitions, 2536 flow [2024-06-14 12:14:59,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 207 transitions, 2473 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 12:14:59,404 INFO L231 Difference]: Finished difference. Result has 134 places, 168 transitions, 1914 flow [2024-06-14 12:14:59,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=160, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1914, PETRI_PLACES=134, PETRI_TRANSITIONS=168} [2024-06-14 12:14:59,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 91 predicate places. [2024-06-14 12:14:59,405 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 168 transitions, 1914 flow [2024-06-14 12:14:59,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:14:59,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:14:59,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:14:59,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 12:14:59,406 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 12:14:59,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:14:59,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1077988998, now seen corresponding path program 4 times [2024-06-14 12:14:59,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:14:59,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935532994] [2024-06-14 12:14:59,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:14:59,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:14:59,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:00,186 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 12:15:00,186 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:00,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935532994] [2024-06-14 12:15:00,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935532994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:00,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:00,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:00,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483552436] [2024-06-14 12:15:00,187 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:00,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:00,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:00,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:00,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:00,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:00,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 168 transitions, 1914 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:00,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:00,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:00,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:00,910 INFO L124 PetriNetUnfolderBase]: 2424/3580 cut-off events. [2024-06-14 12:15:00,910 INFO L125 PetriNetUnfolderBase]: For 119883/119889 co-relation queries the response was YES. [2024-06-14 12:15:00,924 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25472 conditions, 3580 events. 2424/3580 cut-off events. For 119883/119889 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16782 event pairs, 519 based on Foata normal form. 8/3587 useless extension candidates. Maximal degree in co-relation 25407. Up to 2905 conditions per place. [2024-06-14 12:15:00,938 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 142 selfloop transitions, 75 changer transitions 0/220 dead transitions. [2024-06-14 12:15:00,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 220 transitions, 2989 flow [2024-06-14 12:15:00,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:00,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:00,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 167 transitions. [2024-06-14 12:15:00,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49702380952380953 [2024-06-14 12:15:00,939 INFO L175 Difference]: Start difference. First operand has 134 places, 168 transitions, 1914 flow. Second operand 8 states and 167 transitions. [2024-06-14 12:15:00,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 220 transitions, 2989 flow [2024-06-14 12:15:01,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 220 transitions, 2868 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:01,053 INFO L231 Difference]: Finished difference. Result has 139 places, 176 transitions, 2147 flow [2024-06-14 12:15:01,054 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1793, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2147, PETRI_PLACES=139, PETRI_TRANSITIONS=176} [2024-06-14 12:15:01,054 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-14 12:15:01,054 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 176 transitions, 2147 flow [2024-06-14 12:15:01,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:01,054 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:01,054 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:01,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 12:15:01,055 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 12:15:01,055 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:01,055 INFO L85 PathProgramCache]: Analyzing trace with hash -147102248, now seen corresponding path program 1 times [2024-06-14 12:15:01,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:01,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654169531] [2024-06-14 12:15:01,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:01,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:01,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:02,025 INFO 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 12:15:02,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:02,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654169531] [2024-06-14 12:15:02,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654169531] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:02,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:02,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:02,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252591447] [2024-06-14 12:15:02,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:02,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:02,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:02,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:02,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:02,113 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:02,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 176 transitions, 2147 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:02,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:02,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:02,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:02,865 INFO L124 PetriNetUnfolderBase]: 2480/3668 cut-off events. [2024-06-14 12:15:02,865 INFO L125 PetriNetUnfolderBase]: For 134409/134415 co-relation queries the response was YES. [2024-06-14 12:15:02,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27251 conditions, 3668 events. 2480/3668 cut-off events. For 134409/134415 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 17330 event pairs, 540 based on Foata normal form. 14/3681 useless extension candidates. Maximal degree in co-relation 27182. Up to 3167 conditions per place. [2024-06-14 12:15:02,893 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 157 selfloop transitions, 53 changer transitions 0/213 dead transitions. [2024-06-14 12:15:02,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 213 transitions, 2899 flow [2024-06-14 12:15:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:02,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:02,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:15:02,894 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:15:02,894 INFO L175 Difference]: Start difference. First operand has 139 places, 176 transitions, 2147 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:15:02,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 213 transitions, 2899 flow [2024-06-14 12:15:02,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 213 transitions, 2646 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:02,998 INFO L231 Difference]: Finished difference. Result has 141 places, 180 transitions, 2095 flow [2024-06-14 12:15:02,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1896, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2095, PETRI_PLACES=141, PETRI_TRANSITIONS=180} [2024-06-14 12:15:02,999 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 98 predicate places. [2024-06-14 12:15:02,999 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 180 transitions, 2095 flow [2024-06-14 12:15:02,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:03,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:03,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:03,000 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 12:15:03,000 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 12:15:03,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:03,000 INFO L85 PathProgramCache]: Analyzing trace with hash -147109192, now seen corresponding path program 5 times [2024-06-14 12:15:03,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:03,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1011888182] [2024-06-14 12:15:03,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:03,001 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:03,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:03,892 INFO 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 12:15:03,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:03,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1011888182] [2024-06-14 12:15:03,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1011888182] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:03,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:03,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:03,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820408578] [2024-06-14 12:15:03,892 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:03,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:03,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:03,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:03,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:03,945 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:03,945 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 180 transitions, 2095 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:03,945 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:03,945 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:03,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:04,613 INFO L124 PetriNetUnfolderBase]: 2516/3720 cut-off events. [2024-06-14 12:15:04,614 INFO L125 PetriNetUnfolderBase]: For 139213/139219 co-relation queries the response was YES. [2024-06-14 12:15:04,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27489 conditions, 3720 events. 2516/3720 cut-off events. For 139213/139219 co-relation queries the response was YES. Maximal size of possible extension queue 162. Compared 17614 event pairs, 517 based on Foata normal form. 8/3727 useless extension candidates. Maximal degree in co-relation 27420. Up to 3237 conditions per place. [2024-06-14 12:15:04,646 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 158 selfloop transitions, 55 changer transitions 0/216 dead transitions. [2024-06-14 12:15:04,646 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 216 transitions, 2801 flow [2024-06-14 12:15:04,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:04,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:04,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-14 12:15:04,647 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-14 12:15:04,647 INFO L175 Difference]: Start difference. First operand has 141 places, 180 transitions, 2095 flow. Second operand 8 states and 153 transitions. [2024-06-14 12:15:04,647 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 216 transitions, 2801 flow [2024-06-14 12:15:04,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 216 transitions, 2632 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:04,787 INFO L231 Difference]: Finished difference. Result has 143 places, 184 transitions, 2131 flow [2024-06-14 12:15:04,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1926, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2131, PETRI_PLACES=143, PETRI_TRANSITIONS=184} [2024-06-14 12:15:04,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 100 predicate places. [2024-06-14 12:15:04,788 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 184 transitions, 2131 flow [2024-06-14 12:15:04,788 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:04,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:04,788 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:04,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 12:15:04,788 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:04,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:04,789 INFO L85 PathProgramCache]: Analyzing trace with hash -147282172, now seen corresponding path program 6 times [2024-06-14 12:15:04,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:04,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677298590] [2024-06-14 12:15:04,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:04,789 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:04,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:05,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:05,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:05,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677298590] [2024-06-14 12:15:05,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677298590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:05,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:05,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:05,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623593601] [2024-06-14 12:15:05,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:05,716 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:05,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:05,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:05,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:05,793 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:05,793 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 184 transitions, 2131 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:05,793 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:05,793 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:05,793 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:06,515 INFO L124 PetriNetUnfolderBase]: 2552/3772 cut-off events. [2024-06-14 12:15:06,515 INFO L125 PetriNetUnfolderBase]: For 147904/147910 co-relation queries the response was YES. [2024-06-14 12:15:06,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27937 conditions, 3772 events. 2552/3772 cut-off events. For 147904/147910 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17940 event pairs, 518 based on Foata normal form. 8/3779 useless extension candidates. Maximal degree in co-relation 27867. Up to 3289 conditions per place. [2024-06-14 12:15:06,541 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 164 selfloop transitions, 57 changer transitions 0/224 dead transitions. [2024-06-14 12:15:06,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 224 transitions, 2935 flow [2024-06-14 12:15:06,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:06,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:06,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 12:15:06,542 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-14 12:15:06,542 INFO L175 Difference]: Start difference. First operand has 143 places, 184 transitions, 2131 flow. Second operand 8 states and 158 transitions. [2024-06-14 12:15:06,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 224 transitions, 2935 flow [2024-06-14 12:15:06,659 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 224 transitions, 2772 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:06,662 INFO L231 Difference]: Finished difference. Result has 145 places, 188 transitions, 2185 flow [2024-06-14 12:15:06,662 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1968, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2185, PETRI_PLACES=145, PETRI_TRANSITIONS=188} [2024-06-14 12:15:06,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 12:15:06,663 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 188 transitions, 2185 flow [2024-06-14 12:15:06,663 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:06,663 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:06,663 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:06,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 12:15:06,663 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:06,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:06,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1177991672, now seen corresponding path program 1 times [2024-06-14 12:15:06,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:06,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636894469] [2024-06-14 12:15:06,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:06,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:06,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:07,216 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:07,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:07,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636894469] [2024-06-14 12:15:07,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636894469] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:07,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:07,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:07,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394404654] [2024-06-14 12:15:07,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:07,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:07,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:07,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:07,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:07,272 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:07,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 188 transitions, 2185 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:07,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:07,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:07,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:07,849 INFO L124 PetriNetUnfolderBase]: 2557/3778 cut-off events. [2024-06-14 12:15:07,850 INFO L125 PetriNetUnfolderBase]: For 154025/154025 co-relation queries the response was YES. [2024-06-14 12:15:07,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28269 conditions, 3778 events. 2557/3778 cut-off events. For 154025/154025 co-relation queries the response was YES. Maximal size of possible extension queue 164. Compared 17877 event pairs, 639 based on Foata normal form. 1/3778 useless extension candidates. Maximal degree in co-relation 28198. Up to 3740 conditions per place. [2024-06-14 12:15:07,878 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 188 selfloop transitions, 16 changer transitions 0/207 dead transitions. [2024-06-14 12:15:07,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 207 transitions, 2750 flow [2024-06-14 12:15:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:07,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:07,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 12:15:07,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-14 12:15:07,879 INFO L175 Difference]: Start difference. First operand has 145 places, 188 transitions, 2185 flow. Second operand 6 states and 105 transitions. [2024-06-14 12:15:07,879 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 207 transitions, 2750 flow [2024-06-14 12:15:08,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 207 transitions, 2571 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:08,013 INFO L231 Difference]: Finished difference. Result has 145 places, 191 transitions, 2099 flow [2024-06-14 12:15:08,013 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2010, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2099, PETRI_PLACES=145, PETRI_TRANSITIONS=191} [2024-06-14 12:15:08,014 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 102 predicate places. [2024-06-14 12:15:08,014 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 191 transitions, 2099 flow [2024-06-14 12:15:08,014 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:08,014 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:08,014 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:08,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 12:15:08,014 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 12:15:08,014 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:08,014 INFO L85 PathProgramCache]: Analyzing trace with hash 24792996, now seen corresponding path program 2 times [2024-06-14 12:15:08,014 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:08,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621183052] [2024-06-14 12:15:08,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:08,015 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:08,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:08,917 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 12:15:08,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:08,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621183052] [2024-06-14 12:15:08,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621183052] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:08,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:08,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:08,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497180461] [2024-06-14 12:15:08,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:08,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:08,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:08,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:08,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:09,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:09,048 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 191 transitions, 2099 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:09,048 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:09,048 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:09,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:09,745 INFO L124 PetriNetUnfolderBase]: 2585/3822 cut-off events. [2024-06-14 12:15:09,745 INFO L125 PetriNetUnfolderBase]: For 163041/163041 co-relation queries the response was YES. [2024-06-14 12:15:09,762 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28265 conditions, 3822 events. 2585/3822 cut-off events. For 163041/163041 co-relation queries the response was YES. Maximal size of possible extension queue 166. Compared 18179 event pairs, 627 based on Foata normal form. 6/3827 useless extension candidates. Maximal degree in co-relation 28193. Up to 3722 conditions per place. [2024-06-14 12:15:09,777 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 193 selfloop transitions, 24 changer transitions 0/220 dead transitions. [2024-06-14 12:15:09,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 220 transitions, 2741 flow [2024-06-14 12:15:09,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:09,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:09,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 12:15:09,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-14 12:15:09,778 INFO L175 Difference]: Start difference. First operand has 145 places, 191 transitions, 2099 flow. Second operand 8 states and 141 transitions. [2024-06-14 12:15:09,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 220 transitions, 2741 flow [2024-06-14 12:15:09,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 220 transitions, 2623 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:09,896 INFO L231 Difference]: Finished difference. Result has 148 places, 194 transitions, 2121 flow [2024-06-14 12:15:09,896 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1981, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2121, PETRI_PLACES=148, PETRI_TRANSITIONS=194} [2024-06-14 12:15:09,897 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 105 predicate places. [2024-06-14 12:15:09,897 INFO L495 AbstractCegarLoop]: Abstraction has has 148 places, 194 transitions, 2121 flow [2024-06-14 12:15:09,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:09,897 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:09,897 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:09,897 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 12:15:09,897 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 12:15:09,897 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:09,897 INFO L85 PathProgramCache]: Analyzing trace with hash -269233342, now seen corresponding path program 7 times [2024-06-14 12:15:09,897 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:09,897 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893809123] [2024-06-14 12:15:09,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:09,898 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:10,607 INFO 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 12:15:10,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:10,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893809123] [2024-06-14 12:15:10,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893809123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:10,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:10,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:10,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1425526775] [2024-06-14 12:15:10,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:10,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:10,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:10,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:10,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:10,661 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:10,661 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 148 places, 194 transitions, 2121 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:10,661 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:10,661 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:10,661 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:11,355 INFO L124 PetriNetUnfolderBase]: 2600/3845 cut-off events. [2024-06-14 12:15:11,355 INFO L125 PetriNetUnfolderBase]: For 170523/170529 co-relation queries the response was YES. [2024-06-14 12:15:11,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28801 conditions, 3845 events. 2600/3845 cut-off events. For 170523/170529 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18326 event pairs, 625 based on Foata normal form. 12/3856 useless extension candidates. Maximal degree in co-relation 28728. Up to 3643 conditions per place. [2024-06-14 12:15:11,386 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 188 selfloop transitions, 40 changer transitions 0/231 dead transitions. [2024-06-14 12:15:11,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 231 transitions, 3022 flow [2024-06-14 12:15:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:11,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:11,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-14 12:15:11,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-14 12:15:11,387 INFO L175 Difference]: Start difference. First operand has 148 places, 194 transitions, 2121 flow. Second operand 8 states and 148 transitions. [2024-06-14 12:15:11,387 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 231 transitions, 3022 flow [2024-06-14 12:15:11,505 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 149 places, 231 transitions, 2906 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:11,508 INFO L231 Difference]: Finished difference. Result has 151 places, 202 transitions, 2296 flow [2024-06-14 12:15:11,508 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2005, PETRI_DIFFERENCE_MINUEND_PLACES=142, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2296, PETRI_PLACES=151, PETRI_TRANSITIONS=202} [2024-06-14 12:15:11,508 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 108 predicate places. [2024-06-14 12:15:11,508 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 202 transitions, 2296 flow [2024-06-14 12:15:11,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:11,509 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:11,509 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:11,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 12:15:11,509 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 12:15:11,509 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:11,509 INFO L85 PathProgramCache]: Analyzing trace with hash -80363038, now seen corresponding path program 3 times [2024-06-14 12:15:11,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:11,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139887882] [2024-06-14 12:15:11,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:11,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:11,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:12,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:12,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139887882] [2024-06-14 12:15:12,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139887882] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:12,364 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:12,364 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:12,364 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418077500] [2024-06-14 12:15:12,364 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:12,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:12,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:12,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:12,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:12,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:12,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 202 transitions, 2296 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:12,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:12,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:12,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:13,209 INFO L124 PetriNetUnfolderBase]: 2628/3888 cut-off events. [2024-06-14 12:15:13,209 INFO L125 PetriNetUnfolderBase]: For 180433/180433 co-relation queries the response was YES. [2024-06-14 12:15:13,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29472 conditions, 3888 events. 2628/3888 cut-off events. For 180433/180433 co-relation queries the response was YES. Maximal size of possible extension queue 170. Compared 18526 event pairs, 624 based on Foata normal form. 6/3893 useless extension candidates. Maximal degree in co-relation 29397. Up to 3729 conditions per place. [2024-06-14 12:15:13,242 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 192 selfloop transitions, 36 changer transitions 0/231 dead transitions. [2024-06-14 12:15:13,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 231 transitions, 2972 flow [2024-06-14 12:15:13,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:13,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:13,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 12:15:13,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-14 12:15:13,244 INFO L175 Difference]: Start difference. First operand has 151 places, 202 transitions, 2296 flow. Second operand 8 states and 143 transitions. [2024-06-14 12:15:13,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 231 transitions, 2972 flow [2024-06-14 12:15:13,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 231 transitions, 2853 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:13,389 INFO L231 Difference]: Finished difference. Result has 155 places, 205 transitions, 2353 flow [2024-06-14 12:15:13,389 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2177, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2353, PETRI_PLACES=155, PETRI_TRANSITIONS=205} [2024-06-14 12:15:13,389 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 112 predicate places. [2024-06-14 12:15:13,389 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 205 transitions, 2353 flow [2024-06-14 12:15:13,390 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:13,390 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:13,390 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:13,390 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 12:15:13,390 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 12:15:13,390 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:13,390 INFO L85 PathProgramCache]: Analyzing trace with hash 830542364, now seen corresponding path program 4 times [2024-06-14 12:15:13,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:13,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854830596] [2024-06-14 12:15:13,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:13,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:13,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:14,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:14,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:14,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854830596] [2024-06-14 12:15:14,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854830596] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:14,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:14,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:14,159 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [396014654] [2024-06-14 12:15:14,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:14,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:14,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:14,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:14,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 205 transitions, 2353 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:14,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:14,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:14,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:14,946 INFO L124 PetriNetUnfolderBase]: 2656/3932 cut-off events. [2024-06-14 12:15:14,947 INFO L125 PetriNetUnfolderBase]: For 190074/190074 co-relation queries the response was YES. [2024-06-14 12:15:14,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30250 conditions, 3932 events. 2656/3932 cut-off events. For 190074/190074 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18837 event pairs, 619 based on Foata normal form. 6/3937 useless extension candidates. Maximal degree in co-relation 30173. Up to 3804 conditions per place. [2024-06-14 12:15:14,979 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 203 selfloop transitions, 28 changer transitions 0/234 dead transitions. [2024-06-14 12:15:14,979 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 234 transitions, 3041 flow [2024-06-14 12:15:14,980 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:14,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:14,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-14 12:15:14,980 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-14 12:15:14,980 INFO L175 Difference]: Start difference. First operand has 155 places, 205 transitions, 2353 flow. Second operand 8 states and 142 transitions. [2024-06-14 12:15:14,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 234 transitions, 3041 flow [2024-06-14 12:15:15,203 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 234 transitions, 2901 flow, removed 38 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:15,206 INFO L231 Difference]: Finished difference. Result has 157 places, 208 transitions, 2375 flow [2024-06-14 12:15:15,206 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2213, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2375, PETRI_PLACES=157, PETRI_TRANSITIONS=208} [2024-06-14 12:15:15,206 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 114 predicate places. [2024-06-14 12:15:15,206 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 208 transitions, 2375 flow [2024-06-14 12:15:15,206 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:15,206 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:15,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:15,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 12:15:15,207 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 12:15:15,207 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:15,207 INFO L85 PathProgramCache]: Analyzing trace with hash 830245446, now seen corresponding path program 1 times [2024-06-14 12:15:15,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:15,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672153006] [2024-06-14 12:15:15,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:15,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:15,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:15,931 INFO 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 12:15:15,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:15,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672153006] [2024-06-14 12:15:15,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672153006] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:15,932 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:15,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:15,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442094150] [2024-06-14 12:15:15,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:15,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:15,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:15,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:15,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:16,043 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:16,044 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 208 transitions, 2375 flow. Second operand has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:16,044 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:16,044 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:16,044 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:16,778 INFO L124 PetriNetUnfolderBase]: 2647/3920 cut-off events. [2024-06-14 12:15:16,778 INFO L125 PetriNetUnfolderBase]: For 195287/195291 co-relation queries the response was YES. [2024-06-14 12:15:16,796 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30263 conditions, 3920 events. 2647/3920 cut-off events. For 195287/195291 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18801 event pairs, 635 based on Foata normal form. 7/3926 useless extension candidates. Maximal degree in co-relation 30185. Up to 3765 conditions per place. [2024-06-14 12:15:16,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 191 selfloop transitions, 36 changer transitions 0/230 dead transitions. [2024-06-14 12:15:16,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 230 transitions, 2959 flow [2024-06-14 12:15:16,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 12:15:16,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 12:15:16,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-06-14 12:15:16,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4387755102040816 [2024-06-14 12:15:16,813 INFO L175 Difference]: Start difference. First operand has 157 places, 208 transitions, 2375 flow. Second operand 7 states and 129 transitions. [2024-06-14 12:15:16,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 230 transitions, 2959 flow [2024-06-14 12:15:16,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 230 transitions, 2775 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:16,967 INFO L231 Difference]: Finished difference. Result has 158 places, 208 transitions, 2277 flow [2024-06-14 12:15:16,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2191, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2277, PETRI_PLACES=158, PETRI_TRANSITIONS=208} [2024-06-14 12:15:16,968 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-14 12:15:16,968 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 208 transitions, 2277 flow [2024-06-14 12:15:16,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.555555555555555) internal successors, (86), 9 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 12:15:16,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:16,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:16,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 12:15:16,969 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 12:15:16,969 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:16,969 INFO L85 PathProgramCache]: Analyzing trace with hash 1686930328, now seen corresponding path program 5 times [2024-06-14 12:15:16,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:16,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567475912] [2024-06-14 12:15:16,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:16,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:16,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:17,875 INFO 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 12:15:17,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:17,876 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567475912] [2024-06-14 12:15:17,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567475912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:17,876 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:17,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:17,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579699250] [2024-06-14 12:15:17,876 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:17,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:17,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:17,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:17,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:17,946 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:17,946 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 208 transitions, 2277 flow. Second operand has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:17,946 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:17,946 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:17,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:18,708 INFO L124 PetriNetUnfolderBase]: 2650/3924 cut-off events. [2024-06-14 12:15:18,708 INFO L125 PetriNetUnfolderBase]: For 202326/202326 co-relation queries the response was YES. [2024-06-14 12:15:18,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30177 conditions, 3924 events. 2650/3924 cut-off events. For 202326/202326 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18804 event pairs, 635 based on Foata normal form. 6/3929 useless extension candidates. Maximal degree in co-relation 30098. Up to 3764 conditions per place. [2024-06-14 12:15:18,740 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 206 selfloop transitions, 30 changer transitions 0/239 dead transitions. [2024-06-14 12:15:18,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 239 transitions, 3067 flow [2024-06-14 12:15:18,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:18,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:18,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 12:15:18,741 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-14 12:15:18,741 INFO L175 Difference]: Start difference. First operand has 158 places, 208 transitions, 2277 flow. Second operand 8 states and 144 transitions. [2024-06-14 12:15:18,741 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 239 transitions, 3067 flow [2024-06-14 12:15:18,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 239 transitions, 2975 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:18,914 INFO L231 Difference]: Finished difference. Result has 160 places, 211 transitions, 2361 flow [2024-06-14 12:15:18,914 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2195, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2361, PETRI_PLACES=160, PETRI_TRANSITIONS=211} [2024-06-14 12:15:18,914 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 12:15:18,915 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 211 transitions, 2361 flow [2024-06-14 12:15:18,915 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.4) internal successors, (94), 10 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:18,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:18,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:18,915 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 12:15:18,915 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:18,915 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:18,915 INFO L85 PathProgramCache]: Analyzing trace with hash 1189996112, now seen corresponding path program 2 times [2024-06-14 12:15:18,915 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:18,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [236452958] [2024-06-14 12:15:18,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:18,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:18,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:19,420 INFO 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 12:15:19,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:19,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [236452958] [2024-06-14 12:15:19,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [236452958] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:19,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:19,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:19,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45806106] [2024-06-14 12:15:19,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:19,421 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:19,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:19,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:19,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:19,454 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:19,454 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 211 transitions, 2361 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:19,454 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:19,454 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:19,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:20,111 INFO L124 PetriNetUnfolderBase]: 2647/3920 cut-off events. [2024-06-14 12:15:20,111 INFO L125 PetriNetUnfolderBase]: For 197946/197946 co-relation queries the response was YES. [2024-06-14 12:15:20,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30105 conditions, 3920 events. 2647/3920 cut-off events. For 197946/197946 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18726 event pairs, 636 based on Foata normal form. 1/3920 useless extension candidates. Maximal degree in co-relation 30025. Up to 3901 conditions per place. [2024-06-14 12:15:20,142 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 206 selfloop transitions, 11 changer transitions 0/220 dead transitions. [2024-06-14 12:15:20,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 220 transitions, 2817 flow [2024-06-14 12:15:20,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:20,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:20,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 12:15:20,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-14 12:15:20,143 INFO L175 Difference]: Start difference. First operand has 160 places, 211 transitions, 2361 flow. Second operand 6 states and 96 transitions. [2024-06-14 12:15:20,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 220 transitions, 2817 flow [2024-06-14 12:15:20,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 220 transitions, 2665 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:20,310 INFO L231 Difference]: Finished difference. Result has 160 places, 211 transitions, 2237 flow [2024-06-14 12:15:20,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2209, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=200, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2237, PETRI_PLACES=160, PETRI_TRANSITIONS=211} [2024-06-14 12:15:20,310 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 117 predicate places. [2024-06-14 12:15:20,310 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 211 transitions, 2237 flow [2024-06-14 12:15:20,311 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:20,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:20,311 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:20,311 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 12:15:20,311 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:20,311 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:20,311 INFO L85 PathProgramCache]: Analyzing trace with hash -639312088, now seen corresponding path program 1 times [2024-06-14 12:15:20,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:20,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209651806] [2024-06-14 12:15:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:20,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:20,795 INFO 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 12:15:20,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:20,796 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209651806] [2024-06-14 12:15:20,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209651806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:20,796 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:20,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:20,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120294359] [2024-06-14 12:15:20,796 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:20,796 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:20,796 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:20,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:20,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:20,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:20,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 211 transitions, 2237 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:20,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:20,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:20,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:21,531 INFO L124 PetriNetUnfolderBase]: 2646/3919 cut-off events. [2024-06-14 12:15:21,531 INFO L125 PetriNetUnfolderBase]: For 202238/202238 co-relation queries the response was YES. [2024-06-14 12:15:21,550 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29827 conditions, 3919 events. 2646/3919 cut-off events. For 202238/202238 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 18695 event pairs, 642 based on Foata normal form. 3/3921 useless extension candidates. Maximal degree in co-relation 29746. Up to 3851 conditions per place. [2024-06-14 12:15:21,565 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 200 selfloop transitions, 24 changer transitions 0/227 dead transitions. [2024-06-14 12:15:21,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 227 transitions, 2839 flow [2024-06-14 12:15:21,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:21,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:21,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2024-06-14 12:15:21,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-14 12:15:21,566 INFO L175 Difference]: Start difference. First operand has 160 places, 211 transitions, 2237 flow. Second operand 6 states and 106 transitions. [2024-06-14 12:15:21,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 227 transitions, 2839 flow [2024-06-14 12:15:21,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 227 transitions, 2807 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 12:15:21,787 INFO L231 Difference]: Finished difference. Result has 161 places, 214 transitions, 2312 flow [2024-06-14 12:15:21,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2205, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2312, PETRI_PLACES=161, PETRI_TRANSITIONS=214} [2024-06-14 12:15:21,787 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 118 predicate places. [2024-06-14 12:15:21,787 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 214 transitions, 2312 flow [2024-06-14 12:15:21,787 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:21,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:21,787 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 12:15:21,788 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 12:15:21,788 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:21,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:21,788 INFO L85 PathProgramCache]: Analyzing trace with hash 1190002064, now seen corresponding path program 2 times [2024-06-14 12:15:21,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:21,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251331140] [2024-06-14 12:15:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:21,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:21,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:22,256 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 12:15:22,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:22,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251331140] [2024-06-14 12:15:22,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251331140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:22,257 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:22,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 12:15:22,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062744363] [2024-06-14 12:15:22,257 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:22,257 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 12:15:22,257 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:22,257 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 12:15:22,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 12:15:22,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:22,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 214 transitions, 2312 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:22,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:22,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:22,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:23,001 INFO L124 PetriNetUnfolderBase]: 2611/3866 cut-off events. [2024-06-14 12:15:23,001 INFO L125 PetriNetUnfolderBase]: For 208976/208980 co-relation queries the response was YES. [2024-06-14 12:15:23,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29720 conditions, 3866 events. 2611/3866 cut-off events. For 208976/208980 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18375 event pairs, 645 based on Foata normal form. 2/3867 useless extension candidates. Maximal degree in co-relation 29638. Up to 3800 conditions per place. [2024-06-14 12:15:23,036 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 195 selfloop transitions, 25 changer transitions 0/223 dead transitions. [2024-06-14 12:15:23,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 223 transitions, 2774 flow [2024-06-14 12:15:23,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 12:15:23,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 12:15:23,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 12:15:23,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-14 12:15:23,037 INFO L175 Difference]: Start difference. First operand has 161 places, 214 transitions, 2312 flow. Second operand 6 states and 103 transitions. [2024-06-14 12:15:23,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 223 transitions, 2774 flow [2024-06-14 12:15:23,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 223 transitions, 2714 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:23,221 INFO L231 Difference]: Finished difference. Result has 163 places, 214 transitions, 2308 flow [2024-06-14 12:15:23,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2252, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2308, PETRI_PLACES=163, PETRI_TRANSITIONS=214} [2024-06-14 12:15:23,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 120 predicate places. [2024-06-14 12:15:23,221 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 214 transitions, 2308 flow [2024-06-14 12:15:23,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 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 12:15:23,221 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:23,221 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 12:15:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 12:15:23,222 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 12:15:23,222 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:23,222 INFO L85 PathProgramCache]: Analyzing trace with hash 361448748, now seen corresponding path program 1 times [2024-06-14 12:15:23,222 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:23,222 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172269788] [2024-06-14 12:15:23,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:23,222 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:23,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:24,252 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 12:15:24,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:24,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172269788] [2024-06-14 12:15:24,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172269788] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:24,252 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:24,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:24,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049912564] [2024-06-14 12:15:24,253 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:24,253 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:24,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:24,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:24,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:24,367 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:24,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 214 transitions, 2308 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:24,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:24,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:24,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:25,314 INFO L124 PetriNetUnfolderBase]: 3798/5663 cut-off events. [2024-06-14 12:15:25,315 INFO L125 PetriNetUnfolderBase]: For 299226/299230 co-relation queries the response was YES. [2024-06-14 12:15:25,345 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43034 conditions, 5663 events. 3798/5663 cut-off events. For 299226/299230 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 29463 event pairs, 1183 based on Foata normal form. 25/5687 useless extension candidates. Maximal degree in co-relation 42951. Up to 3766 conditions per place. [2024-06-14 12:15:25,367 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 285 selfloop transitions, 88 changer transitions 0/376 dead transitions. [2024-06-14 12:15:25,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 376 transitions, 4867 flow [2024-06-14 12:15:25,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:15:25,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:15:25,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 192 transitions. [2024-06-14 12:15:25,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2024-06-14 12:15:25,368 INFO L175 Difference]: Start difference. First operand has 163 places, 214 transitions, 2308 flow. Second operand 10 states and 192 transitions. [2024-06-14 12:15:25,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 376 transitions, 4867 flow [2024-06-14 12:15:25,633 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 376 transitions, 4792 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 12:15:25,637 INFO L231 Difference]: Finished difference. Result has 172 places, 276 transitions, 3385 flow [2024-06-14 12:15:25,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2236, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=214, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3385, PETRI_PLACES=172, PETRI_TRANSITIONS=276} [2024-06-14 12:15:25,638 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 129 predicate places. [2024-06-14 12:15:25,638 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 276 transitions, 3385 flow [2024-06-14 12:15:25,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:25,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:25,638 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 12:15:25,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 12:15:25,638 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 12:15:25,639 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:25,639 INFO L85 PathProgramCache]: Analyzing trace with hash 391297514, now seen corresponding path program 2 times [2024-06-14 12:15:25,639 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:25,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265114215] [2024-06-14 12:15:25,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:25,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:25,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:26,387 INFO 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 12:15:26,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:26,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265114215] [2024-06-14 12:15:26,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265114215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:26,388 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:26,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:26,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398222889] [2024-06-14 12:15:26,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:26,389 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:26,389 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:26,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:26,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:26,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:26,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 276 transitions, 3385 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:26,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:26,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:26,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:28,009 INFO L124 PetriNetUnfolderBase]: 5293/7911 cut-off events. [2024-06-14 12:15:28,009 INFO L125 PetriNetUnfolderBase]: For 430471/430479 co-relation queries the response was YES. [2024-06-14 12:15:28,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65497 conditions, 7911 events. 5293/7911 cut-off events. For 430471/430479 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 44594 event pairs, 1006 based on Foata normal form. 29/7939 useless extension candidates. Maximal degree in co-relation 65409. Up to 5046 conditions per place. [2024-06-14 12:15:28,076 INFO L140 encePairwiseOnDemand]: 27/42 looper letters, 329 selfloop transitions, 183 changer transitions 0/515 dead transitions. [2024-06-14 12:15:28,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 515 transitions, 7627 flow [2024-06-14 12:15:28,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:15:28,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:15:28,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 12:15:28,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-14 12:15:28,078 INFO L175 Difference]: Start difference. First operand has 172 places, 276 transitions, 3385 flow. Second operand 10 states and 206 transitions. [2024-06-14 12:15:28,078 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 515 transitions, 7627 flow [2024-06-14 12:15:28,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 515 transitions, 7453 flow, removed 86 selfloop flow, removed 1 redundant places. [2024-06-14 12:15:28,626 INFO L231 Difference]: Finished difference. Result has 186 places, 389 transitions, 5775 flow [2024-06-14 12:15:28,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3297, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5775, PETRI_PLACES=186, PETRI_TRANSITIONS=389} [2024-06-14 12:15:28,627 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 143 predicate places. [2024-06-14 12:15:28,627 INFO L495 AbstractCegarLoop]: Abstraction has has 186 places, 389 transitions, 5775 flow [2024-06-14 12:15:28,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:28,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:28,627 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 12:15:28,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 12:15:28,627 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 12:15:28,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:28,628 INFO L85 PathProgramCache]: Analyzing trace with hash 1744913776, now seen corresponding path program 3 times [2024-06-14 12:15:28,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:28,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341452353] [2024-06-14 12:15:28,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:28,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:28,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:29,400 INFO 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 12:15:29,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:29,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341452353] [2024-06-14 12:15:29,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341452353] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:29,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:29,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:29,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141656704] [2024-06-14 12:15:29,401 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:29,401 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:29,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:29,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:29,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:29,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:29,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 389 transitions, 5775 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:29,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:29,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:29,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:31,292 INFO L124 PetriNetUnfolderBase]: 5894/8846 cut-off events. [2024-06-14 12:15:31,292 INFO L125 PetriNetUnfolderBase]: For 552379/552387 co-relation queries the response was YES. [2024-06-14 12:15:31,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77085 conditions, 8846 events. 5894/8846 cut-off events. For 552379/552387 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 51188 event pairs, 1211 based on Foata normal form. 85/8930 useless extension candidates. Maximal degree in co-relation 76989. Up to 6663 conditions per place. [2024-06-14 12:15:31,382 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 355 selfloop transitions, 188 changer transitions 0/546 dead transitions. [2024-06-14 12:15:31,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 546 transitions, 8796 flow [2024-06-14 12:15:31,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 12:15:31,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 12:15:31,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 237 transitions. [2024-06-14 12:15:31,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47023809523809523 [2024-06-14 12:15:31,383 INFO L175 Difference]: Start difference. First operand has 186 places, 389 transitions, 5775 flow. Second operand 12 states and 237 transitions. [2024-06-14 12:15:31,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 546 transitions, 8796 flow [2024-06-14 12:15:32,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 546 transitions, 8686 flow, removed 45 selfloop flow, removed 2 redundant places. [2024-06-14 12:15:32,223 INFO L231 Difference]: Finished difference. Result has 203 places, 437 transitions, 7129 flow [2024-06-14 12:15:32,223 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5665, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=7129, PETRI_PLACES=203, PETRI_TRANSITIONS=437} [2024-06-14 12:15:32,223 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 160 predicate places. [2024-06-14 12:15:32,224 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 437 transitions, 7129 flow [2024-06-14 12:15:32,224 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:32,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:32,224 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 12:15:32,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 12:15:32,224 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:32,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:32,224 INFO L85 PathProgramCache]: Analyzing trace with hash -1845305860, now seen corresponding path program 4 times [2024-06-14 12:15:32,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:32,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334817916] [2024-06-14 12:15:32,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:32,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:33,005 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:33,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:33,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334817916] [2024-06-14 12:15:33,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334817916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:33,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:33,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:15:33,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648809206] [2024-06-14 12:15:33,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:33,006 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:15:33,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:33,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:15:33,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:15:33,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:33,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 437 transitions, 7129 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:33,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:33,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:33,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:35,133 INFO L124 PetriNetUnfolderBase]: 6339/9541 cut-off events. [2024-06-14 12:15:35,133 INFO L125 PetriNetUnfolderBase]: For 591046/591054 co-relation queries the response was YES. [2024-06-14 12:15:35,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88053 conditions, 9541 events. 6339/9541 cut-off events. For 591046/591054 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 56133 event pairs, 1334 based on Foata normal form. 45/9585 useless extension candidates. Maximal degree in co-relation 87948. Up to 6628 conditions per place. [2024-06-14 12:15:35,229 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 369 selfloop transitions, 187 changer transitions 0/559 dead transitions. [2024-06-14 12:15:35,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 213 places, 559 transitions, 9814 flow [2024-06-14 12:15:35,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:15:35,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:15:35,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 222 transitions. [2024-06-14 12:15:35,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4805194805194805 [2024-06-14 12:15:35,234 INFO L175 Difference]: Start difference. First operand has 203 places, 437 transitions, 7129 flow. Second operand 11 states and 222 transitions. [2024-06-14 12:15:35,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 213 places, 559 transitions, 9814 flow [2024-06-14 12:15:36,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 559 transitions, 9589 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:36,308 INFO L231 Difference]: Finished difference. Result has 212 places, 448 transitions, 7637 flow [2024-06-14 12:15:36,308 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=6904, PETRI_DIFFERENCE_MINUEND_PLACES=200, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7637, PETRI_PLACES=212, PETRI_TRANSITIONS=448} [2024-06-14 12:15:36,309 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 169 predicate places. [2024-06-14 12:15:36,309 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 448 transitions, 7637 flow [2024-06-14 12:15:36,309 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:15:36,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:36,309 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 12:15:36,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 12:15:36,309 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 12:15:36,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:36,309 INFO L85 PathProgramCache]: Analyzing trace with hash 845556822, now seen corresponding path program 1 times [2024-06-14 12:15:36,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:36,309 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116422629] [2024-06-14 12:15:36,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:36,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:36,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:36,779 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 12:15:36,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:36,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116422629] [2024-06-14 12:15:36,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116422629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:36,779 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:36,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:36,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477389836] [2024-06-14 12:15:36,779 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:36,780 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:36,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:36,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:36,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:36,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:36,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 448 transitions, 7637 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 12:15:36,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:36,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:36,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:38,815 INFO L124 PetriNetUnfolderBase]: 6502/9776 cut-off events. [2024-06-14 12:15:38,815 INFO L125 PetriNetUnfolderBase]: For 596661/596673 co-relation queries the response was YES. [2024-06-14 12:15:38,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90494 conditions, 9776 events. 6502/9776 cut-off events. For 596661/596673 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 57772 event pairs, 1427 based on Foata normal form. 17/9792 useless extension candidates. Maximal degree in co-relation 90387. Up to 8987 conditions per place. [2024-06-14 12:15:38,923 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 427 selfloop transitions, 120 changer transitions 0/550 dead transitions. [2024-06-14 12:15:38,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 550 transitions, 10466 flow [2024-06-14 12:15:38,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:38,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:38,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 155 transitions. [2024-06-14 12:15:38,924 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.46130952380952384 [2024-06-14 12:15:38,924 INFO L175 Difference]: Start difference. First operand has 212 places, 448 transitions, 7637 flow. Second operand 8 states and 155 transitions. [2024-06-14 12:15:38,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 550 transitions, 10466 flow [2024-06-14 12:15:40,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 212 places, 550 transitions, 10072 flow, removed 53 selfloop flow, removed 7 redundant places. [2024-06-14 12:15:40,132 INFO L231 Difference]: Finished difference. Result has 216 places, 515 transitions, 9135 flow [2024-06-14 12:15:40,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7325, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9135, PETRI_PLACES=216, PETRI_TRANSITIONS=515} [2024-06-14 12:15:40,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 173 predicate places. [2024-06-14 12:15:40,132 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 515 transitions, 9135 flow [2024-06-14 12:15:40,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 12:15:40,133 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:40,133 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 12:15:40,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 12:15:40,133 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 12:15:40,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:40,133 INFO L85 PathProgramCache]: Analyzing trace with hash -711274944, now seen corresponding path program 2 times [2024-06-14 12:15:40,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:40,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6015973] [2024-06-14 12:15:40,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:40,133 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:40,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:40,728 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:40,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:40,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6015973] [2024-06-14 12:15:40,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6015973] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:40,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:40,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 12:15:40,729 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571067009] [2024-06-14 12:15:40,729 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:40,729 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 12:15:40,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:40,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 12:15:40,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 12:15:40,784 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:40,784 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 515 transitions, 9135 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 12:15:40,784 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:40,784 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:40,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:43,193 INFO L124 PetriNetUnfolderBase]: 6554/9856 cut-off events. [2024-06-14 12:15:43,194 INFO L125 PetriNetUnfolderBase]: For 593278/593290 co-relation queries the response was YES. [2024-06-14 12:15:43,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93294 conditions, 9856 events. 6554/9856 cut-off events. For 593278/593290 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 58301 event pairs, 1593 based on Foata normal form. 17/9872 useless extension candidates. Maximal degree in co-relation 93182. Up to 8793 conditions per place. [2024-06-14 12:15:43,299 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 415 selfloop transitions, 184 changer transitions 0/602 dead transitions. [2024-06-14 12:15:43,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 602 transitions, 11708 flow [2024-06-14 12:15:43,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 12:15:43,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 12:15:43,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 12:15:43,300 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4642857142857143 [2024-06-14 12:15:43,300 INFO L175 Difference]: Start difference. First operand has 216 places, 515 transitions, 9135 flow. Second operand 8 states and 156 transitions. [2024-06-14 12:15:43,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 602 transitions, 11708 flow [2024-06-14 12:15:44,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 602 transitions, 11618 flow, removed 37 selfloop flow, removed 2 redundant places. [2024-06-14 12:15:44,450 INFO L231 Difference]: Finished difference. Result has 224 places, 554 transitions, 10440 flow [2024-06-14 12:15:44,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9075, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=145, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10440, PETRI_PLACES=224, PETRI_TRANSITIONS=554} [2024-06-14 12:15:44,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 181 predicate places. [2024-06-14 12:15:44,451 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 554 transitions, 10440 flow [2024-06-14 12:15:44,451 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 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 12:15:44,451 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:44,452 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 12:15:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 12:15:44,452 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:44,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:44,452 INFO L85 PathProgramCache]: Analyzing trace with hash 316707014, now seen corresponding path program 5 times [2024-06-14 12:15:44,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:44,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568625173] [2024-06-14 12:15:44,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:44,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:44,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:45,016 INFO 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 12:15:45,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:45,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568625173] [2024-06-14 12:15:45,017 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568625173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:45,017 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:45,017 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:45,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [467145890] [2024-06-14 12:15:45,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:45,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:45,019 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:45,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:45,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:45,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:45,125 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 554 transitions, 10440 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:45,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:45,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:45,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:48,091 INFO L124 PetriNetUnfolderBase]: 8498/12997 cut-off events. [2024-06-14 12:15:48,091 INFO L125 PetriNetUnfolderBase]: For 894808/894818 co-relation queries the response was YES. [2024-06-14 12:15:48,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 124993 conditions, 12997 events. 8498/12997 cut-off events. For 894808/894818 co-relation queries the response was YES. Maximal size of possible extension queue 698. Compared 83798 event pairs, 1648 based on Foata normal form. 31/13027 useless extension candidates. Maximal degree in co-relation 124877. Up to 4276 conditions per place. [2024-06-14 12:15:48,264 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 369 selfloop transitions, 309 changer transitions 0/681 dead transitions. [2024-06-14 12:15:48,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 681 transitions, 13701 flow [2024-06-14 12:15:48,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:48,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:48,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 190 transitions. [2024-06-14 12:15:48,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5026455026455027 [2024-06-14 12:15:48,265 INFO L175 Difference]: Start difference. First operand has 224 places, 554 transitions, 10440 flow. Second operand 9 states and 190 transitions. [2024-06-14 12:15:48,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 681 transitions, 13701 flow [2024-06-14 12:15:50,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 681 transitions, 13467 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 12:15:50,042 INFO L231 Difference]: Finished difference. Result has 232 places, 588 transitions, 11762 flow [2024-06-14 12:15:50,042 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10206, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=276, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11762, PETRI_PLACES=232, PETRI_TRANSITIONS=588} [2024-06-14 12:15:50,042 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 189 predicate places. [2024-06-14 12:15:50,042 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 588 transitions, 11762 flow [2024-06-14 12:15:50,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:50,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:50,043 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 12:15:50,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 12:15:50,043 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:15:50,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:50,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1749188272, now seen corresponding path program 6 times [2024-06-14 12:15:50,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:50,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339730992] [2024-06-14 12:15:50,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:50,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:50,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:50,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:50,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:50,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339730992] [2024-06-14 12:15:50,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339730992] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:50,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:50,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:50,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724264641] [2024-06-14 12:15:50,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:50,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:50,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:50,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:50,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:50,741 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:50,741 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 588 transitions, 11762 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:50,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:50,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:50,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:15:54,907 INFO L124 PetriNetUnfolderBase]: 10093/15411 cut-off events. [2024-06-14 12:15:54,907 INFO L125 PetriNetUnfolderBase]: For 1170666/1170676 co-relation queries the response was YES. [2024-06-14 12:15:55,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156727 conditions, 15411 events. 10093/15411 cut-off events. For 1170666/1170676 co-relation queries the response was YES. Maximal size of possible extension queue 854. Compared 102275 event pairs, 2642 based on Foata normal form. 47/15457 useless extension candidates. Maximal degree in co-relation 156607. Up to 6831 conditions per place. [2024-06-14 12:15:55,119 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 403 selfloop transitions, 373 changer transitions 0/779 dead transitions. [2024-06-14 12:15:55,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 779 transitions, 16451 flow [2024-06-14 12:15:55,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:15:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:15:55,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 189 transitions. [2024-06-14 12:15:55,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 12:15:55,120 INFO L175 Difference]: Start difference. First operand has 232 places, 588 transitions, 11762 flow. Second operand 9 states and 189 transitions. [2024-06-14 12:15:55,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 779 transitions, 16451 flow [2024-06-14 12:15:57,752 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 779 transitions, 15942 flow, removed 101 selfloop flow, removed 3 redundant places. [2024-06-14 12:15:57,762 INFO L231 Difference]: Finished difference. Result has 241 places, 662 transitions, 13984 flow [2024-06-14 12:15:57,763 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11398, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=301, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13984, PETRI_PLACES=241, PETRI_TRANSITIONS=662} [2024-06-14 12:15:57,763 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 198 predicate places. [2024-06-14 12:15:57,763 INFO L495 AbstractCegarLoop]: Abstraction has has 241 places, 662 transitions, 13984 flow [2024-06-14 12:15:57,763 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:57,763 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:15:57,763 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 12:15:57,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 12:15:57,764 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 12:15:57,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:15:57,764 INFO L85 PathProgramCache]: Analyzing trace with hash 2123751352, now seen corresponding path program 7 times [2024-06-14 12:15:57,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:15:57,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890627753] [2024-06-14 12:15:57,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:15:57,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:15:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:15:58,434 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:15:58,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:15:58,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890627753] [2024-06-14 12:15:58,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890627753] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:15:58,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:15:58,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:15:58,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166632058] [2024-06-14 12:15:58,435 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:15:58,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:15:58,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:15:58,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:15:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:15:58,522 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:15:58,522 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 241 places, 662 transitions, 13984 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:15:58,522 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:15:58,522 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:15:58,522 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:02,607 INFO L124 PetriNetUnfolderBase]: 10423/15955 cut-off events. [2024-06-14 12:16:02,607 INFO L125 PetriNetUnfolderBase]: For 1280063/1280073 co-relation queries the response was YES. [2024-06-14 12:16:02,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 167459 conditions, 15955 events. 10423/15955 cut-off events. For 1280063/1280073 co-relation queries the response was YES. Maximal size of possible extension queue 889. Compared 106946 event pairs, 3278 based on Foata normal form. 67/16021 useless extension candidates. Maximal degree in co-relation 167334. Up to 12016 conditions per place. [2024-06-14 12:16:02,967 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 412 selfloop transitions, 354 changer transitions 0/769 dead transitions. [2024-06-14 12:16:02,967 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 769 transitions, 16949 flow [2024-06-14 12:16:02,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:02,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:02,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 186 transitions. [2024-06-14 12:16:02,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49206349206349204 [2024-06-14 12:16:02,969 INFO L175 Difference]: Start difference. First operand has 241 places, 662 transitions, 13984 flow. Second operand 9 states and 186 transitions. [2024-06-14 12:16:02,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 769 transitions, 16949 flow [2024-06-14 12:16:06,455 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 769 transitions, 16712 flow, removed 107 selfloop flow, removed 3 redundant places. [2024-06-14 12:16:06,466 INFO L231 Difference]: Finished difference. Result has 250 places, 677 transitions, 15110 flow [2024-06-14 12:16:06,467 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=13747, PETRI_DIFFERENCE_MINUEND_PLACES=238, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=662, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=339, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=315, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15110, PETRI_PLACES=250, PETRI_TRANSITIONS=677} [2024-06-14 12:16:06,467 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 207 predicate places. [2024-06-14 12:16:06,467 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 677 transitions, 15110 flow [2024-06-14 12:16:06,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:06,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:06,467 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 12:16:06,467 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 12:16:06,467 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:06,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:06,468 INFO L85 PathProgramCache]: Analyzing trace with hash 1751062222, now seen corresponding path program 8 times [2024-06-14 12:16:06,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:06,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984639551] [2024-06-14 12:16:06,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:06,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:06,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:07,135 INFO 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 12:16:07,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:07,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984639551] [2024-06-14 12:16:07,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984639551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:07,135 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:07,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 12:16:07,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806527677] [2024-06-14 12:16:07,135 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:07,135 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 12:16:07,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:07,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 12:16:07,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 12:16:07,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:07,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 677 transitions, 15110 flow. Second operand has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:07,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:07,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:07,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:11,536 INFO L124 PetriNetUnfolderBase]: 10767/16489 cut-off events. [2024-06-14 12:16:11,537 INFO L125 PetriNetUnfolderBase]: For 1355199/1355209 co-relation queries the response was YES. [2024-06-14 12:16:11,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177541 conditions, 16489 events. 10767/16489 cut-off events. For 1355199/1355209 co-relation queries the response was YES. Maximal size of possible extension queue 924. Compared 111095 event pairs, 3251 based on Foata normal form. 63/16551 useless extension candidates. Maximal degree in co-relation 177412. Up to 10834 conditions per place. [2024-06-14 12:16:11,789 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 420 selfloop transitions, 361 changer transitions 0/784 dead transitions. [2024-06-14 12:16:11,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 258 places, 784 transitions, 18243 flow [2024-06-14 12:16:11,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:11,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:11,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 187 transitions. [2024-06-14 12:16:11,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4947089947089947 [2024-06-14 12:16:11,791 INFO L175 Difference]: Start difference. First operand has 250 places, 677 transitions, 15110 flow. Second operand 9 states and 187 transitions. [2024-06-14 12:16:11,791 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 258 places, 784 transitions, 18243 flow [2024-06-14 12:16:15,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 253 places, 784 transitions, 17551 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 12:16:15,454 INFO L231 Difference]: Finished difference. Result has 255 places, 686 transitions, 15560 flow [2024-06-14 12:16:15,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=14418, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=677, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=355, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=15560, PETRI_PLACES=255, PETRI_TRANSITIONS=686} [2024-06-14 12:16:15,454 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 212 predicate places. [2024-06-14 12:16:15,455 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 686 transitions, 15560 flow [2024-06-14 12:16:15,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.666666666666666) internal successors, (87), 9 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 12:16:15,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:15,455 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 12:16:15,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 12:16:15,455 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 12:16:15,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:15,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1762607920, now seen corresponding path program 9 times [2024-06-14 12:16:15,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:15,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126937943] [2024-06-14 12:16:15,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:15,456 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:15,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:16,228 INFO 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 12:16:16,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:16,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126937943] [2024-06-14 12:16:16,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126937943] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:16,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:16,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:16,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560091203] [2024-06-14 12:16:16,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:16,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:16,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:16,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:16,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:16,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:16,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 686 transitions, 15560 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:16:16,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:16,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:16,315 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:21,224 INFO L124 PetriNetUnfolderBase]: 11833/18158 cut-off events. [2024-06-14 12:16:21,225 INFO L125 PetriNetUnfolderBase]: For 1617278/1617294 co-relation queries the response was YES. [2024-06-14 12:16:21,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 201152 conditions, 18158 events. 11833/18158 cut-off events. For 1617278/1617294 co-relation queries the response was YES. Maximal size of possible extension queue 1026. Compared 125188 event pairs, 4190 based on Foata normal form. 69/18226 useless extension candidates. Maximal degree in co-relation 201021. Up to 14897 conditions per place. [2024-06-14 12:16:21,496 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 579 selfloop transitions, 223 changer transitions 0/805 dead transitions. [2024-06-14 12:16:21,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 805 transitions, 19443 flow [2024-06-14 12:16:21,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 12:16:21,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 12:16:21,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 206 transitions. [2024-06-14 12:16:21,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49047619047619045 [2024-06-14 12:16:21,498 INFO L175 Difference]: Start difference. First operand has 255 places, 686 transitions, 15560 flow. Second operand 10 states and 206 transitions. [2024-06-14 12:16:21,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 805 transitions, 19443 flow [2024-06-14 12:16:25,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 805 transitions, 18997 flow, removed 77 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:25,724 INFO L231 Difference]: Finished difference. Result has 263 places, 723 transitions, 16867 flow [2024-06-14 12:16:25,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=15151, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=686, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=16867, PETRI_PLACES=263, PETRI_TRANSITIONS=723} [2024-06-14 12:16:25,725 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-14 12:16:25,725 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 723 transitions, 16867 flow [2024-06-14 12:16:25,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:16:25,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:25,726 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 12:16:25,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 12:16:25,726 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 12:16:25,726 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:25,726 INFO L85 PathProgramCache]: Analyzing trace with hash 1504323670, now seen corresponding path program 10 times [2024-06-14 12:16:25,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:25,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222238471] [2024-06-14 12:16:25,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:25,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:25,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:26,490 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 12:16:26,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:26,490 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222238471] [2024-06-14 12:16:26,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222238471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:26,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:26,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:26,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380081727] [2024-06-14 12:16:26,491 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:26,491 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:26,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:26,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:26,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:26,589 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:26,590 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 723 transitions, 16867 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:16:26,590 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:26,590 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:26,590 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:32,042 INFO L124 PetriNetUnfolderBase]: 12314/18964 cut-off events. [2024-06-14 12:16:32,042 INFO L125 PetriNetUnfolderBase]: For 1735689/1735705 co-relation queries the response was YES. [2024-06-14 12:16:32,406 INFO L83 FinitePrefix]: Finished finitePrefix Result has 209866 conditions, 18964 events. 12314/18964 cut-off events. For 1735689/1735705 co-relation queries the response was YES. Maximal size of possible extension queue 1076. Compared 132286 event pairs, 4448 based on Foata normal form. 121/19084 useless extension candidates. Maximal degree in co-relation 209731. Up to 16780 conditions per place. [2024-06-14 12:16:32,501 INFO L140 encePairwiseOnDemand]: 26/42 looper letters, 586 selfloop transitions, 220 changer transitions 0/809 dead transitions. [2024-06-14 12:16:32,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 273 places, 809 transitions, 19636 flow [2024-06-14 12:16:32,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 12:16:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 12:16:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 217 transitions. [2024-06-14 12:16:32,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4696969696969697 [2024-06-14 12:16:32,502 INFO L175 Difference]: Start difference. First operand has 263 places, 723 transitions, 16867 flow. Second operand 11 states and 217 transitions. [2024-06-14 12:16:32,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 273 places, 809 transitions, 19636 flow [2024-06-14 12:16:37,127 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 809 transitions, 19345 flow, removed 82 selfloop flow, removed 4 redundant places. [2024-06-14 12:16:37,140 INFO L231 Difference]: Finished difference. Result has 273 places, 734 transitions, 17488 flow [2024-06-14 12:16:37,140 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=16588, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=209, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=503, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17488, PETRI_PLACES=273, PETRI_TRANSITIONS=734} [2024-06-14 12:16:37,141 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 230 predicate places. [2024-06-14 12:16:37,141 INFO L495 AbstractCegarLoop]: Abstraction has has 273 places, 734 transitions, 17488 flow [2024-06-14 12:16:37,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:16:37,141 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:37,141 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 12:16:37,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 12:16:37,142 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 12:16:37,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:37,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1510037962, now seen corresponding path program 1 times [2024-06-14 12:16:37,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:37,142 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847024920] [2024-06-14 12:16:37,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:37,142 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:37,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:37,929 INFO 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 12:16:37,930 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:37,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847024920] [2024-06-14 12:16:37,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847024920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:37,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:37,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [318501718] [2024-06-14 12:16:37,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:37,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:38,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:38,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 273 places, 734 transitions, 17488 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:16:38,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:38,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:38,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 12:16:43,496 INFO L124 PetriNetUnfolderBase]: 12404/19089 cut-off events. [2024-06-14 12:16:43,497 INFO L125 PetriNetUnfolderBase]: For 1660934/1660950 co-relation queries the response was YES. [2024-06-14 12:16:43,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 212012 conditions, 19089 events. 12404/19089 cut-off events. For 1660934/1660950 co-relation queries the response was YES. Maximal size of possible extension queue 1074. Compared 133118 event pairs, 4470 based on Foata normal form. 25/19113 useless extension candidates. Maximal degree in co-relation 211872. Up to 17593 conditions per place. [2024-06-14 12:16:43,829 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 586 selfloop transitions, 231 changer transitions 0/820 dead transitions. [2024-06-14 12:16:43,830 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 820 transitions, 20528 flow [2024-06-14 12:16:43,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 12:16:43,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 12:16:43,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 173 transitions. [2024-06-14 12:16:43,831 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4576719576719577 [2024-06-14 12:16:43,831 INFO L175 Difference]: Start difference. First operand has 273 places, 734 transitions, 17488 flow. Second operand 9 states and 173 transitions. [2024-06-14 12:16:43,831 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 820 transitions, 20528 flow [2024-06-14 12:16:47,670 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 820 transitions, 20079 flow, removed 52 selfloop flow, removed 6 redundant places. [2024-06-14 12:16:47,683 INFO L231 Difference]: Finished difference. Result has 280 places, 767 transitions, 18632 flow [2024-06-14 12:16:47,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=17058, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=18632, PETRI_PLACES=280, PETRI_TRANSITIONS=767} [2024-06-14 12:16:47,684 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-14 12:16:47,684 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 767 transitions, 18632 flow [2024-06-14 12:16:47,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:16:47,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 12:16:47,684 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 12:16:47,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 12:16:47,684 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 12:16:47,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 12:16:47,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1510045402, now seen corresponding path program 2 times [2024-06-14 12:16:47,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 12:16:47,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783863154] [2024-06-14 12:16:47,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 12:16:47,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 12:16:47,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 12:16:48,482 INFO 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 12:16:48,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 12:16:48,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783863154] [2024-06-14 12:16:48,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783863154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 12:16:48,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 12:16:48,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 12:16:48,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666049382] [2024-06-14 12:16:48,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 12:16:48,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 12:16:48,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 12:16:48,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 12:16:48,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 12:16:48,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-14 12:16:48,606 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 767 transitions, 18632 flow. Second operand has 10 states, 10 states have (on average 9.5) internal successors, (95), 10 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 12:16:48,606 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 12:16:48,606 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-14 12:16:48,606 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand