./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.opt.i --full-output --witness-type correctness_witness --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --validate ./goblint.2024-05-21_14-57-05.files/protection/safe011_power.opt_pso.opt.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/safe011_power.opt_pso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe011_power.opt_pso.opt.yml/witness.yml -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --traceabstraction.compute.hoare.annotation.of.negated.interpolant.automaton,.abstraction.and.cfg false --witnessparser.only.consider.loop.invariants false --cacsl2boogietranslator.check.unreachability.of.reach_error.function false --- Real Ultimate output --- This is Ultimate 0.2.4-tmp.fs.goblint-validation-cde23df-m [2024-06-14 13:03:51,577 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:03:51,645 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:03:51,650 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:03:51,651 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:03:51,676 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:03:51,676 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:03:51,677 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:03:51,677 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:03:51,680 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:03:51,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:03:51,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:03:51,682 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:03:51,683 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:03:51,683 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:03:51,683 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:03:51,683 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:03:51,684 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:03:51,684 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:03:51,684 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:03:51,684 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:03:51,685 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:03:51,685 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:03:51,685 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:03:51,685 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:03:51,685 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:03:51,686 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:03:51,686 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:03:51,686 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:03:51,687 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:03:51,687 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:03:51,688 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:03:51,688 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:03:51,688 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:03:51,688 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:03:51,688 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:03:51,689 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:03:51,689 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:03:51,689 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:03:51,689 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:03:51,689 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:03:51,690 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:03:51,690 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:03:51,690 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:03:51,943 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:03:51,974 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:03:51,976 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:03:51,977 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:03:51,978 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:03:51,979 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.opt.i [2024-06-14 13:03:53,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:03:53,284 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:03:53,287 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe011_power.opt_pso.opt.i [2024-06-14 13:03:53,305 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd4be711f/28fa2a9152c2403bb9c8cee880fe7ca6/FLAG6d3d3df28 [2024-06-14 13:03:53,316 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/bd4be711f/28fa2a9152c2403bb9c8cee880fe7ca6 [2024-06-14 13:03:53,318 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:03:53,319 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:03:53,319 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe011_power.opt_pso.opt.yml/witness.yml [2024-06-14 13:03:53,480 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:03:53,481 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:03:53,482 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:03:53,482 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:03:53,486 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:03:53,487 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:03:53" (1/2) ... [2024-06-14 13:03:53,487 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ec376b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:03:53, skipping insertion in model container [2024-06-14 13:03:53,487 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:03:53" (1/2) ... [2024-06-14 13:03:53,489 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@366b871a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:03:53, skipping insertion in model container [2024-06-14 13:03:53,489 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:03:53" (2/2) ... [2024-06-14 13:03:53,490 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@41ec376b and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:53, skipping insertion in model container [2024-06-14 13:03:53,490 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:03:53" (2/2) ... [2024-06-14 13:03:53,490 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:03:53,560 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:03:53,561 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-14 13:03:53,562 INFO L97 edCorrectnessWitness]: Location invariant before [L821-L821] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-14 13:03:53,562 INFO L97 edCorrectnessWitness]: Location invariant before [L824-L824] ((((((((((((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$r_buff1_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= z && z <= 2) && z <= 127) && ((z == 0 || z == 1) || z == 2)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 1) && (__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1)))) && (! multithreaded || (((0 <= x$mem_tmp && x$mem_tmp <= 2) && x$mem_tmp <= 127) && ((x$mem_tmp == 0 || x$mem_tmp == 1) || x$mem_tmp == 2)))) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0) [2024-06-14 13:03:53,562 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:03:53,562 INFO L106 edCorrectnessWitness]: ghost_update [L819-L819] multithreaded = 1; [2024-06-14 13:03:53,604 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:03:53,929 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:03:53,938 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:03:54,059 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:03:54,091 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:03:54,093 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54 WrapperNode [2024-06-14 13:03:54,093 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:03:54,094 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:03:54,094 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:03:54,094 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:03:54,099 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,116 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,169 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 143 [2024-06-14 13:03:54,169 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:03:54,170 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:03:54,170 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:03:54,170 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:03:54,178 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,178 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,181 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,194 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 13:03:54,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,194 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,201 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,202 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,204 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,205 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,207 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:03:54,208 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:03:54,208 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:03:54,208 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:03:54,209 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (1/1) ... [2024-06-14 13:03:54,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:03:54,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:03:54,237 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 13:03:54,244 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 13:03:54,267 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:03:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:03:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:03:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:03:54,268 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:03:54,268 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:03:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:03:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:03:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:03:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:03:54,269 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:03:54,269 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:03:54,270 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 13:03:54,401 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:03:54,404 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:03:54,759 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:03:54,759 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:03:54,944 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:03:54,944 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:03:54,945 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:03:54 BoogieIcfgContainer [2024-06-14 13:03:54,945 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:03:54,947 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:03:54,947 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:03:54,950 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:03:54,950 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:03:53" (1/4) ... [2024-06-14 13:03:54,950 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef73e5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:03:54, skipping insertion in model container [2024-06-14 13:03:54,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:03:53" (2/4) ... [2024-06-14 13:03:54,951 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef73e5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:03:54, skipping insertion in model container [2024-06-14 13:03:54,951 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:03:54" (3/4) ... [2024-06-14 13:03:54,952 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@ef73e5 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:03:54, skipping insertion in model container [2024-06-14 13:03:54,952 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:03:54" (4/4) ... [2024-06-14 13:03:54,953 INFO L112 eAbstractionObserver]: Analyzing ICFG safe011_power.opt_pso.opt.i [2024-06-14 13:03:54,965 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:03:54,966 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:03:54,966 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:03:55,005 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:03:55,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:03:55,123 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:03:55,124 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:03:55,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 63 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:03:55,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:03:55,130 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:03:55,158 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:03:55,164 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;@5f3bfba6, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:03:55,165 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:03:55,170 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:03:55,184 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:03:55,184 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:03:55,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:55,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:03:55,185 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 13:03:55,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash -1456369184, now seen corresponding path program 1 times [2024-06-14 13:03:55,198 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:55,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835515554] [2024-06-14 13:03:55,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:55,199 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:55,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:56,127 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:56,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:56,128 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835515554] [2024-06-14 13:03:56,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835515554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:56,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:56,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:03:56,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121149434] [2024-06-14 13:03:56,131 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:56,136 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:03:56,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:56,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:03:56,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:03:56,185 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:03:56,187 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:56,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:56,188 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:03:56,189 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:56,535 INFO L124 PetriNetUnfolderBase]: 1407/2119 cut-off events. [2024-06-14 13:03:56,535 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 13:03:56,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4325 conditions, 2119 events. 1407/2119 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9669 event pairs, 989 based on Foata normal form. 1/2076 useless extension candidates. Maximal degree in co-relation 4310. Up to 2105 conditions per place. [2024-06-14 13:03:56,578 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 13:03:56,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 175 flow [2024-06-14 13:03:56,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:03:56,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:03:56,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2024-06-14 13:03:56,590 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:03:56,591 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 68 transitions. [2024-06-14 13:03:56,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 175 flow [2024-06-14 13:03:56,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 170 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:03:56,597 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:03:56,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:03:56,601 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:03:56,601 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:03:56,602 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:56,602 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:56,602 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:56,602 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:03:56,603 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 13:03:56,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:56,604 INFO L85 PathProgramCache]: Analyzing trace with hash 588573823, now seen corresponding path program 1 times [2024-06-14 13:03:56,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:56,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234356738] [2024-06-14 13:03:56,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:56,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:56,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:57,233 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:57,234 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234356738] [2024-06-14 13:03:57,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234356738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:57,234 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:57,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:03:57,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399978847] [2024-06-14 13:03:57,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:57,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:03:57,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:57,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:03:57,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:03:57,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:03:57,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:57,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:57,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:03:57,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:57,541 INFO L124 PetriNetUnfolderBase]: 1415/2130 cut-off events. [2024-06-14 13:03:57,542 INFO L125 PetriNetUnfolderBase]: For 400/408 co-relation queries the response was YES. [2024-06-14 13:03:57,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4915 conditions, 2130 events. 1415/2130 cut-off events. For 400/408 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9623 event pairs, 866 based on Foata normal form. 8/2135 useless extension candidates. Maximal degree in co-relation 4900. Up to 2072 conditions per place. [2024-06-14 13:03:57,552 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 45 selfloop transitions, 11 changer transitions 0/60 dead transitions. [2024-06-14 13:03:57,553 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 60 transitions, 280 flow [2024-06-14 13:03:57,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:03:57,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:03:57,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 93 transitions. [2024-06-14 13:03:57,554 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:03:57,554 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 93 transitions. [2024-06-14 13:03:57,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 60 transitions, 280 flow [2024-06-14 13:03:57,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 60 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:03:57,556 INFO L231 Difference]: Finished difference. Result has 46 places, 43 transitions, 172 flow [2024-06-14 13:03:57,557 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=172, PETRI_PLACES=46, PETRI_TRANSITIONS=43} [2024-06-14 13:03:57,557 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 13:03:57,557 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 43 transitions, 172 flow [2024-06-14 13:03:57,558 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:57,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:57,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:57,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:03:57,558 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 13:03:57,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:57,559 INFO L85 PathProgramCache]: Analyzing trace with hash 1065920051, now seen corresponding path program 1 times [2024-06-14 13:03:57,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:57,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292320868] [2024-06-14 13:03:57,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:57,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:57,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:58,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:58,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292320868] [2024-06-14 13:03:58,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292320868] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:58,119 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:58,119 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:03:58,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247916284] [2024-06-14 13:03:58,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:58,119 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:03:58,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:58,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:03:58,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:03:58,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:03:58,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 43 transitions, 172 flow. Second operand has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:58,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:58,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:03:58,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:58,444 INFO L124 PetriNetUnfolderBase]: 1431/2152 cut-off events. [2024-06-14 13:03:58,445 INFO L125 PetriNetUnfolderBase]: For 1373/1390 co-relation queries the response was YES. [2024-06-14 13:03:58,448 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5809 conditions, 2152 events. 1431/2152 cut-off events. For 1373/1390 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9782 event pairs, 618 based on Foata normal form. 16/2165 useless extension candidates. Maximal degree in co-relation 5791. Up to 2012 conditions per place. [2024-06-14 13:03:58,457 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 56 selfloop transitions, 17 changer transitions 0/77 dead transitions. [2024-06-14 13:03:58,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 77 transitions, 418 flow [2024-06-14 13:03:58,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:03:58,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:03:58,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 117 transitions. [2024-06-14 13:03:58,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2024-06-14 13:03:58,459 INFO L175 Difference]: Start difference. First operand has 46 places, 43 transitions, 172 flow. Second operand 5 states and 117 transitions. [2024-06-14 13:03:58,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 77 transitions, 418 flow [2024-06-14 13:03:58,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 77 transitions, 414 flow, removed 2 selfloop flow, removed 0 redundant places. [2024-06-14 13:03:58,462 INFO L231 Difference]: Finished difference. Result has 51 places, 50 transitions, 251 flow [2024-06-14 13:03:58,463 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=51, PETRI_TRANSITIONS=50} [2024-06-14 13:03:58,463 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-14 13:03:58,463 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 50 transitions, 251 flow [2024-06-14 13:03:58,464 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 10.6) internal successors, (53), 5 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:58,464 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:58,464 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:58,464 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:03:58,464 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 13:03:58,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:58,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2146976690, now seen corresponding path program 1 times [2024-06-14 13:03:58,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:58,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430438736] [2024-06-14 13:03:58,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:58,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:58,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:03:59,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:03:59,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:03:59,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430438736] [2024-06-14 13:03:59,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430438736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:03:59,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:03:59,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:03:59,462 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1402794445] [2024-06-14 13:03:59,462 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:03:59,462 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:03:59,462 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:03:59,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:03:59,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:03:59,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:03:59,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 50 transitions, 251 flow. Second operand has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:59,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:03:59,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:03:59,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:03:59,899 INFO L124 PetriNetUnfolderBase]: 1482/2233 cut-off events. [2024-06-14 13:03:59,899 INFO L125 PetriNetUnfolderBase]: For 2719/2734 co-relation queries the response was YES. [2024-06-14 13:03:59,903 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6799 conditions, 2233 events. 1482/2233 cut-off events. For 2719/2734 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10266 event pairs, 484 based on Foata normal form. 24/2254 useless extension candidates. Maximal degree in co-relation 6778. Up to 1991 conditions per place. [2024-06-14 13:03:59,913 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 19 changer transitions 0/88 dead transitions. [2024-06-14 13:03:59,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 88 transitions, 527 flow [2024-06-14 13:03:59,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:03:59,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:03:59,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:03:59,915 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:03:59,915 INFO L175 Difference]: Start difference. First operand has 51 places, 50 transitions, 251 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:03:59,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 88 transitions, 527 flow [2024-06-14 13:03:59,918 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 88 transitions, 511 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-06-14 13:03:59,919 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 293 flow [2024-06-14 13:03:59,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=227, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=293, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 13:03:59,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 13:03:59,920 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 293 flow [2024-06-14 13:03:59,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.428571428571429) internal successors, (73), 7 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:03:59,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:03:59,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:03:59,920 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:03:59,920 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:03:59,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:03:59,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1906018500, now seen corresponding path program 1 times [2024-06-14 13:03:59,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:03:59,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701731522] [2024-06-14 13:03:59,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:03:59,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:03:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:00,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:00,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701731522] [2024-06-14 13:04:00,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701731522] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:00,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:00,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:04:00,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421303459] [2024-06-14 13:04:00,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:00,523 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:04:00,523 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:00,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:04:00,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:04:00,564 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:00,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 293 flow. Second operand has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 13:04:00,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:00,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:00,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:00,900 INFO L124 PetriNetUnfolderBase]: 1477/2226 cut-off events. [2024-06-14 13:04:00,900 INFO L125 PetriNetUnfolderBase]: For 3973/3988 co-relation queries the response was YES. [2024-06-14 13:04:00,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7279 conditions, 2226 events. 1477/2226 cut-off events. For 3973/3988 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 10087 event pairs, 700 based on Foata normal form. 8/2231 useless extension candidates. Maximal degree in co-relation 7255. Up to 2203 conditions per place. [2024-06-14 13:04:00,910 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 13:04:00,910 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 66 transitions, 474 flow [2024-06-14 13:04:00,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:04:00,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:04:00,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-14 13:04:00,912 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-14 13:04:00,912 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 293 flow. Second operand 6 states and 95 transitions. [2024-06-14 13:04:00,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 66 transitions, 474 flow [2024-06-14 13:04:00,914 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 66 transitions, 430 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:00,915 INFO L231 Difference]: Finished difference. Result has 58 places, 56 transitions, 319 flow [2024-06-14 13:04:00,915 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=251, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=58, PETRI_TRANSITIONS=56} [2024-06-14 13:04:00,916 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 13:04:00,916 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 56 transitions, 319 flow [2024-06-14 13:04:00,916 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.666666666666666) internal successors, (58), 6 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 13:04:00,916 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:00,916 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:00,917 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:04:00,917 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 13:04:00,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:00,917 INFO L85 PathProgramCache]: Analyzing trace with hash -1081397346, now seen corresponding path program 1 times [2024-06-14 13:04:00,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:00,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586753210] [2024-06-14 13:04:00,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:00,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:00,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:01,530 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:01,530 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:01,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586753210] [2024-06-14 13:04:01,531 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586753210] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:01,531 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:01,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:04:01,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598233612] [2024-06-14 13:04:01,531 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:01,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:04:01,532 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:01,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:04:01,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:04:01,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:01,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 56 transitions, 319 flow. Second operand has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:01,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:01,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:01,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:01,893 INFO L124 PetriNetUnfolderBase]: 1704/2551 cut-off events. [2024-06-14 13:04:01,894 INFO L125 PetriNetUnfolderBase]: For 5472/5472 co-relation queries the response was YES. [2024-06-14 13:04:01,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8524 conditions, 2551 events. 1704/2551 cut-off events. For 5472/5472 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11697 event pairs, 828 based on Foata normal form. 2/2551 useless extension candidates. Maximal degree in co-relation 8497. Up to 2520 conditions per place. [2024-06-14 13:04:01,907 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 64 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-06-14 13:04:01,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 79 transitions, 560 flow [2024-06-14 13:04:01,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:04:01,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:04:01,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 13:04:01,908 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:04:01,908 INFO L175 Difference]: Start difference. First operand has 58 places, 56 transitions, 319 flow. Second operand 6 states and 96 transitions. [2024-06-14 13:04:01,908 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 79 transitions, 560 flow [2024-06-14 13:04:01,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 79 transitions, 525 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:04:01,912 INFO L231 Difference]: Finished difference. Result has 63 places, 65 transitions, 392 flow [2024-06-14 13:04:01,912 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=392, PETRI_PLACES=63, PETRI_TRANSITIONS=65} [2024-06-14 13:04:01,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 21 predicate places. [2024-06-14 13:04:01,913 INFO L495 AbstractCegarLoop]: Abstraction has has 63 places, 65 transitions, 392 flow [2024-06-14 13:04:01,913 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 8.571428571428571) internal successors, (60), 7 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:01,913 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:01,913 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:01,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:04:01,914 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 13:04:01,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:01,914 INFO L85 PathProgramCache]: Analyzing trace with hash 830700505, now seen corresponding path program 1 times [2024-06-14 13:04:01,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:01,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012061664] [2024-06-14 13:04:01,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:01,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:01,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:02,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:02,552 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:02,553 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012061664] [2024-06-14 13:04:02,553 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012061664] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:02,553 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:02,553 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:04:02,553 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509951830] [2024-06-14 13:04:02,553 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:02,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:04:02,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:02,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:04:02,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:04:02,594 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:02,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 65 transitions, 392 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 13:04:02,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:02,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:02,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:02,999 INFO L124 PetriNetUnfolderBase]: 1650/2482 cut-off events. [2024-06-14 13:04:03,000 INFO L125 PetriNetUnfolderBase]: For 7654/7703 co-relation queries the response was YES. [2024-06-14 13:04:03,006 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9095 conditions, 2482 events. 1650/2482 cut-off events. For 7654/7703 co-relation queries the response was YES. Maximal size of possible extension queue 127. Compared 11431 event pairs, 720 based on Foata normal form. 16/2487 useless extension candidates. Maximal degree in co-relation 9065. Up to 2412 conditions per place. [2024-06-14 13:04:03,024 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 69 selfloop transitions, 19 changer transitions 0/95 dead transitions. [2024-06-14 13:04:03,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 95 transitions, 696 flow [2024-06-14 13:04:03,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:04:03,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:04:03,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:04:03,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:04:03,026 INFO L175 Difference]: Start difference. First operand has 63 places, 65 transitions, 392 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:04:03,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 95 transitions, 696 flow [2024-06-14 13:04:03,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 95 transitions, 688 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-06-14 13:04:03,031 INFO L231 Difference]: Finished difference. Result has 70 places, 76 transitions, 538 flow [2024-06-14 13:04:03,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=384, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=70, PETRI_TRANSITIONS=76} [2024-06-14 13:04:03,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 28 predicate places. [2024-06-14 13:04:03,033 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 76 transitions, 538 flow [2024-06-14 13:04:03,033 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 13:04:03,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:03,033 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:03,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:04:03,034 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 13:04:03,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash -807277655, now seen corresponding path program 2 times [2024-06-14 13:04:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:03,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [65395097] [2024-06-14 13:04:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:03,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:03,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:03,683 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:03,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:03,684 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [65395097] [2024-06-14 13:04:03,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [65395097] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:03,684 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:03,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:04:03,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954368661] [2024-06-14 13:04:03,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:03,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:04:03,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:03,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:04:03,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:04:03,726 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:03,727 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 76 transitions, 538 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 13:04:03,727 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:03,727 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:03,727 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:04,110 INFO L124 PetriNetUnfolderBase]: 1704/2560 cut-off events. [2024-06-14 13:04:04,111 INFO L125 PetriNetUnfolderBase]: For 10263/10327 co-relation queries the response was YES. [2024-06-14 13:04:04,118 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10571 conditions, 2560 events. 1704/2560 cut-off events. For 10263/10327 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 11833 event pairs, 721 based on Foata normal form. 13/2562 useless extension candidates. Maximal degree in co-relation 10536. Up to 2428 conditions per place. [2024-06-14 13:04:04,128 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 71 selfloop transitions, 25 changer transitions 0/103 dead transitions. [2024-06-14 13:04:04,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 103 transitions, 878 flow [2024-06-14 13:04:04,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:04:04,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:04:04,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:04:04,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:04:04,131 INFO L175 Difference]: Start difference. First operand has 70 places, 76 transitions, 538 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:04:04,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 103 transitions, 878 flow [2024-06-14 13:04:04,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 103 transitions, 846 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:04,143 INFO L231 Difference]: Finished difference. Result has 75 places, 84 transitions, 657 flow [2024-06-14 13:04:04,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=657, PETRI_PLACES=75, PETRI_TRANSITIONS=84} [2024-06-14 13:04:04,147 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 33 predicate places. [2024-06-14 13:04:04,147 INFO L495 AbstractCegarLoop]: Abstraction has has 75 places, 84 transitions, 657 flow [2024-06-14 13:04:04,147 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 13:04:04,147 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:04,147 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:04,147 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:04:04,148 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 13:04:04,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:04,149 INFO L85 PathProgramCache]: Analyzing trace with hash 2027764451, now seen corresponding path program 1 times [2024-06-14 13:04:04,149 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:04,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162190621] [2024-06-14 13:04:04,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:04,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:04,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:04,938 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:04,938 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:04,938 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162190621] [2024-06-14 13:04:04,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162190621] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:04,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:04,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:04,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417036562] [2024-06-14 13:04:04,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:04,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:04,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:04,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:04,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:04,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:04,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 84 transitions, 657 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:04,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:04,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:04,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:05,380 INFO L124 PetriNetUnfolderBase]: 1751/2618 cut-off events. [2024-06-14 13:04:05,380 INFO L125 PetriNetUnfolderBase]: For 12782/12782 co-relation queries the response was YES. [2024-06-14 13:04:05,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11277 conditions, 2618 events. 1751/2618 cut-off events. For 12782/12782 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 11946 event pairs, 792 based on Foata normal form. 2/2618 useless extension candidates. Maximal degree in co-relation 11239. Up to 2578 conditions per place. [2024-06-14 13:04:05,393 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 87 selfloop transitions, 15 changer transitions 0/105 dead transitions. [2024-06-14 13:04:05,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 105 transitions, 925 flow [2024-06-14 13:04:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:05,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:04:05,394 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 13:04:05,394 INFO L175 Difference]: Start difference. First operand has 75 places, 84 transitions, 657 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:04:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 105 transitions, 925 flow [2024-06-14 13:04:05,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 880 flow, removed 17 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:05,406 INFO L231 Difference]: Finished difference. Result has 80 places, 87 transitions, 674 flow [2024-06-14 13:04:05,406 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=612, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=674, PETRI_PLACES=80, PETRI_TRANSITIONS=87} [2024-06-14 13:04:05,407 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-14 13:04:05,407 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 87 transitions, 674 flow [2024-06-14 13:04:05,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:05,407 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:05,407 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:05,407 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:04:05,407 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 13:04:05,408 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:05,408 INFO L85 PathProgramCache]: Analyzing trace with hash -18206589, now seen corresponding path program 1 times [2024-06-14 13:04:05,408 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:05,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991325448] [2024-06-14 13:04:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:05,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:05,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:06,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:06,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:06,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991325448] [2024-06-14 13:04:06,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991325448] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:06,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:06,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:06,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [536575773] [2024-06-14 13:04:06,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:06,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:06,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:06,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:06,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:06,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:06,089 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 87 transitions, 674 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 13:04:06,089 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:06,089 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:06,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:06,611 INFO L124 PetriNetUnfolderBase]: 1731/2602 cut-off events. [2024-06-14 13:04:06,612 INFO L125 PetriNetUnfolderBase]: For 17051/17088 co-relation queries the response was YES. [2024-06-14 13:04:06,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11980 conditions, 2602 events. 1731/2602 cut-off events. For 17051/17088 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 12168 event pairs, 572 based on Foata normal form. 27/2580 useless extension candidates. Maximal degree in co-relation 11940. Up to 2368 conditions per place. [2024-06-14 13:04:06,630 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 85 selfloop transitions, 34 changer transitions 0/127 dead transitions. [2024-06-14 13:04:06,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 127 transitions, 1085 flow [2024-06-14 13:04:06,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:06,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:06,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 137 transitions. [2024-06-14 13:04:06,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47735191637630664 [2024-06-14 13:04:06,632 INFO L175 Difference]: Start difference. First operand has 80 places, 87 transitions, 674 flow. Second operand 7 states and 137 transitions. [2024-06-14 13:04:06,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 127 transitions, 1085 flow [2024-06-14 13:04:06,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 127 transitions, 1047 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:06,643 INFO L231 Difference]: Finished difference. Result has 83 places, 96 transitions, 795 flow [2024-06-14 13:04:06,643 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=636, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=795, PETRI_PLACES=83, PETRI_TRANSITIONS=96} [2024-06-14 13:04:06,644 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 41 predicate places. [2024-06-14 13:04:06,644 INFO L495 AbstractCegarLoop]: Abstraction has has 83 places, 96 transitions, 795 flow [2024-06-14 13:04:06,644 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 13:04:06,644 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:06,644 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:06,645 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:04:06,645 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 13:04:06,645 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:06,645 INFO L85 PathProgramCache]: Analyzing trace with hash -18086433, now seen corresponding path program 1 times [2024-06-14 13:04:06,645 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:06,646 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160493644] [2024-06-14 13:04:06,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:06,646 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:06,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:07,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:07,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:07,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160493644] [2024-06-14 13:04:07,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160493644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:07,284 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:07,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:07,284 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [741108126] [2024-06-14 13:04:07,284 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:07,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:07,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:07,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:07,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:07,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:07,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 96 transitions, 795 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:07,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:07,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:07,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:07,797 INFO L124 PetriNetUnfolderBase]: 1829/2730 cut-off events. [2024-06-14 13:04:07,797 INFO L125 PetriNetUnfolderBase]: For 18220/18220 co-relation queries the response was YES. [2024-06-14 13:04:07,804 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13356 conditions, 2730 events. 1829/2730 cut-off events. For 18220/18220 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 12442 event pairs, 617 based on Foata normal form. 2/2730 useless extension candidates. Maximal degree in co-relation 13314. Up to 2684 conditions per place. [2024-06-14 13:04:07,812 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 108 selfloop transitions, 15 changer transitions 0/126 dead transitions. [2024-06-14 13:04:07,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 126 transitions, 1168 flow [2024-06-14 13:04:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:07,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:04:07,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 13:04:07,814 INFO L175 Difference]: Start difference. First operand has 83 places, 96 transitions, 795 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:04:07,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 126 transitions, 1168 flow [2024-06-14 13:04:07,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 126 transitions, 1094 flow, removed 17 selfloop flow, removed 3 redundant places. [2024-06-14 13:04:07,828 INFO L231 Difference]: Finished difference. Result has 89 places, 105 transitions, 853 flow [2024-06-14 13:04:07,828 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=722, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=853, PETRI_PLACES=89, PETRI_TRANSITIONS=105} [2024-06-14 13:04:07,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 47 predicate places. [2024-06-14 13:04:07,828 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 105 transitions, 853 flow [2024-06-14 13:04:07,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:07,829 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:07,829 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:07,829 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:04:07,829 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 13:04:07,830 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:07,830 INFO L85 PathProgramCache]: Analyzing trace with hash -18086619, now seen corresponding path program 2 times [2024-06-14 13:04:07,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:07,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005127987] [2024-06-14 13:04:07,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:07,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:07,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:08,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:08,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:08,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005127987] [2024-06-14 13:04:08,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005127987] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:08,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:08,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:08,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507771228] [2024-06-14 13:04:08,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:08,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:08,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:08,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:08,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:08,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:08,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 105 transitions, 853 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 13:04:08,533 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:08,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:08,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:09,056 INFO L124 PetriNetUnfolderBase]: 1844/2768 cut-off events. [2024-06-14 13:04:09,056 INFO L125 PetriNetUnfolderBase]: For 24742/24800 co-relation queries the response was YES. [2024-06-14 13:04:09,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14292 conditions, 2768 events. 1844/2768 cut-off events. For 24742/24800 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 13008 event pairs, 545 based on Foata normal form. 34/2755 useless extension candidates. Maximal degree in co-relation 14247. Up to 2419 conditions per place. [2024-06-14 13:04:09,101 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 89 selfloop transitions, 46 changer transitions 0/146 dead transitions. [2024-06-14 13:04:09,101 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 146 transitions, 1401 flow [2024-06-14 13:04:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:09,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:09,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 138 transitions. [2024-06-14 13:04:09,103 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4808362369337979 [2024-06-14 13:04:09,103 INFO L175 Difference]: Start difference. First operand has 89 places, 105 transitions, 853 flow. Second operand 7 states and 138 transitions. [2024-06-14 13:04:09,103 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 146 transitions, 1401 flow [2024-06-14 13:04:09,115 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 146 transitions, 1374 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:09,117 INFO L231 Difference]: Finished difference. Result has 95 places, 114 transitions, 1061 flow [2024-06-14 13:04:09,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=826, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1061, PETRI_PLACES=95, PETRI_TRANSITIONS=114} [2024-06-14 13:04:09,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 13:04:09,117 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 114 transitions, 1061 flow [2024-06-14 13:04:09,118 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 13:04:09,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:09,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:09,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:04:09,118 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 13:04:09,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:09,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1564055973, now seen corresponding path program 3 times [2024-06-14 13:04:09,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:09,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610603931] [2024-06-14 13:04:09,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:09,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:09,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:09,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:09,792 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:09,792 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610603931] [2024-06-14 13:04:09,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610603931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:09,792 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:09,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499684060] [2024-06-14 13:04:09,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:09,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:09,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:09,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:09,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:09,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:09,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 114 transitions, 1061 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 13:04:09,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:09,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:09,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:10,258 INFO L124 PetriNetUnfolderBase]: 1886/2832 cut-off events. [2024-06-14 13:04:10,259 INFO L125 PetriNetUnfolderBase]: For 30982/31059 co-relation queries the response was YES. [2024-06-14 13:04:10,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15857 conditions, 2832 events. 1886/2832 cut-off events. For 30982/31059 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 13386 event pairs, 560 based on Foata normal form. 37/2815 useless extension candidates. Maximal degree in co-relation 15809. Up to 2296 conditions per place. [2024-06-14 13:04:10,278 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 92 selfloop transitions, 53 changer transitions 0/156 dead transitions. [2024-06-14 13:04:10,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 156 transitions, 1701 flow [2024-06-14 13:04:10,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:10,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:10,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 135 transitions. [2024-06-14 13:04:10,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47038327526132406 [2024-06-14 13:04:10,279 INFO L175 Difference]: Start difference. First operand has 95 places, 114 transitions, 1061 flow. Second operand 7 states and 135 transitions. [2024-06-14 13:04:10,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 156 transitions, 1701 flow [2024-06-14 13:04:10,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1619 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:04:10,301 INFO L231 Difference]: Finished difference. Result has 101 places, 125 transitions, 1293 flow [2024-06-14 13:04:10,302 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=979, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1293, PETRI_PLACES=101, PETRI_TRANSITIONS=125} [2024-06-14 13:04:10,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 13:04:10,302 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 125 transitions, 1293 flow [2024-06-14 13:04:10,302 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 13:04:10,302 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:10,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:10,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:04:10,303 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:10,303 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:10,303 INFO L85 PathProgramCache]: Analyzing trace with hash 159045087, now seen corresponding path program 2 times [2024-06-14 13:04:10,303 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:10,303 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067841694] [2024-06-14 13:04:10,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:10,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:10,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:11,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:11,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:11,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067841694] [2024-06-14 13:04:11,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067841694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:11,014 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:11,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:11,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865575809] [2024-06-14 13:04:11,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:11,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:11,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:11,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:11,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:11,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:11,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 125 transitions, 1293 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:11,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:11,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:11,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:11,537 INFO L124 PetriNetUnfolderBase]: 1976/2941 cut-off events. [2024-06-14 13:04:11,537 INFO L125 PetriNetUnfolderBase]: For 32928/32942 co-relation queries the response was YES. [2024-06-14 13:04:11,545 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17277 conditions, 2941 events. 1976/2941 cut-off events. For 32928/32942 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13584 event pairs, 625 based on Foata normal form. 12/2950 useless extension candidates. Maximal degree in co-relation 17225. Up to 2846 conditions per place. [2024-06-14 13:04:11,554 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 126 selfloop transitions, 25 changer transitions 0/154 dead transitions. [2024-06-14 13:04:11,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 154 transitions, 1774 flow [2024-06-14 13:04:11,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:11,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:11,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:04:11,555 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 13:04:11,555 INFO L175 Difference]: Start difference. First operand has 101 places, 125 transitions, 1293 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:04:11,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 154 transitions, 1774 flow [2024-06-14 13:04:11,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 154 transitions, 1688 flow, removed 33 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:11,577 INFO L231 Difference]: Finished difference. Result has 107 places, 133 transitions, 1355 flow [2024-06-14 13:04:11,577 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1207, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1355, PETRI_PLACES=107, PETRI_TRANSITIONS=133} [2024-06-14 13:04:11,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 65 predicate places. [2024-06-14 13:04:11,578 INFO L495 AbstractCegarLoop]: Abstraction has has 107 places, 133 transitions, 1355 flow [2024-06-14 13:04:11,578 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:11,578 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:11,578 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:11,578 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:04:11,579 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 13:04:11,579 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:11,579 INFO L85 PathProgramCache]: Analyzing trace with hash 744204669, now seen corresponding path program 3 times [2024-06-14 13:04:11,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:11,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955620019] [2024-06-14 13:04:11,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:11,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:11,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:12,208 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:12,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:12,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955620019] [2024-06-14 13:04:12,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955620019] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:12,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:12,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:12,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193607294] [2024-06-14 13:04:12,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:12,209 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:12,209 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:12,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:12,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:12,291 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:12,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 133 transitions, 1355 flow. Second operand has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:12,292 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:12,292 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:12,292 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:12,683 INFO L124 PetriNetUnfolderBase]: 1971/2934 cut-off events. [2024-06-14 13:04:12,683 INFO L125 PetriNetUnfolderBase]: For 34840/34854 co-relation queries the response was YES. [2024-06-14 13:04:12,694 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17535 conditions, 2934 events. 1971/2934 cut-off events. For 34840/34854 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13549 event pairs, 625 based on Foata normal form. 12/2943 useless extension candidates. Maximal degree in co-relation 17480. Up to 2841 conditions per place. [2024-06-14 13:04:12,704 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 123 selfloop transitions, 27 changer transitions 0/153 dead transitions. [2024-06-14 13:04:12,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 153 transitions, 1716 flow [2024-06-14 13:04:12,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:12,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:12,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:04:12,706 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 13:04:12,707 INFO L175 Difference]: Start difference. First operand has 107 places, 133 transitions, 1355 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:04:12,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 153 transitions, 1716 flow [2024-06-14 13:04:12,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 108 places, 153 transitions, 1627 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:12,740 INFO L231 Difference]: Finished difference. Result has 109 places, 134 transitions, 1339 flow [2024-06-14 13:04:12,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1272, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=133, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1339, PETRI_PLACES=109, PETRI_TRANSITIONS=134} [2024-06-14 13:04:12,742 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 67 predicate places. [2024-06-14 13:04:12,742 INFO L495 AbstractCegarLoop]: Abstraction has has 109 places, 134 transitions, 1339 flow [2024-06-14 13:04:12,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.5) internal successors, (68), 8 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:12,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:12,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:12,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:04:12,742 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 13:04:12,743 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:12,743 INFO L85 PathProgramCache]: Analyzing trace with hash 159291165, now seen corresponding path program 1 times [2024-06-14 13:04:12,743 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:12,743 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62391451] [2024-06-14 13:04:12,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:12,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:12,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:13,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:13,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:13,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62391451] [2024-06-14 13:04:13,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62391451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:13,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:13,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:13,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895787290] [2024-06-14 13:04:13,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:13,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:13,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:13,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:13,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:13,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:13,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 134 transitions, 1339 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:13,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:13,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:13,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:14,253 INFO L124 PetriNetUnfolderBase]: 1963/2920 cut-off events. [2024-06-14 13:04:14,253 INFO L125 PetriNetUnfolderBase]: For 36483/36483 co-relation queries the response was YES. [2024-06-14 13:04:14,265 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17413 conditions, 2920 events. 1963/2920 cut-off events. For 36483/36483 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13420 event pairs, 600 based on Foata normal form. 4/2922 useless extension candidates. Maximal degree in co-relation 17358. Up to 2862 conditions per place. [2024-06-14 13:04:14,276 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 17 changer transitions 0/159 dead transitions. [2024-06-14 13:04:14,276 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 159 transitions, 1729 flow [2024-06-14 13:04:14,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:14,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:14,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:04:14,279 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 13:04:14,279 INFO L175 Difference]: Start difference. First operand has 109 places, 134 transitions, 1339 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:04:14,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 159 transitions, 1729 flow [2024-06-14 13:04:14,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 1685 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:14,310 INFO L231 Difference]: Finished difference. Result has 113 places, 136 transitions, 1360 flow [2024-06-14 13:04:14,310 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1295, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=117, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1360, PETRI_PLACES=113, PETRI_TRANSITIONS=136} [2024-06-14 13:04:14,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 13:04:14,311 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 136 transitions, 1360 flow [2024-06-14 13:04:14,312 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:14,312 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:14,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:14,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:04:14,312 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 13:04:14,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:14,313 INFO L85 PathProgramCache]: Analyzing trace with hash -564492936, now seen corresponding path program 1 times [2024-06-14 13:04:14,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:14,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560360850] [2024-06-14 13:04:14,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:14,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:14,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:15,147 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:15,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:15,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560360850] [2024-06-14 13:04:15,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1560360850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:15,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:15,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:15,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237593856] [2024-06-14 13:04:15,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:15,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:15,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:15,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:15,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:15,259 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:15,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 136 transitions, 1360 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 13:04:15,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:15,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:15,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:15,933 INFO L124 PetriNetUnfolderBase]: 1864/2795 cut-off events. [2024-06-14 13:04:15,933 INFO L125 PetriNetUnfolderBase]: For 40900/40960 co-relation queries the response was YES. [2024-06-14 13:04:15,941 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17159 conditions, 2795 events. 1864/2795 cut-off events. For 40900/40960 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 13068 event pairs, 553 based on Foata normal form. 36/2803 useless extension candidates. Maximal degree in co-relation 17103. Up to 2513 conditions per place. [2024-06-14 13:04:15,949 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 116 selfloop transitions, 38 changer transitions 0/169 dead transitions. [2024-06-14 13:04:15,949 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 169 transitions, 1834 flow [2024-06-14 13:04:15,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:04:15,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:04:15,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 136 transitions. [2024-06-14 13:04:15,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4738675958188153 [2024-06-14 13:04:15,952 INFO L175 Difference]: Start difference. First operand has 113 places, 136 transitions, 1360 flow. Second operand 7 states and 136 transitions. [2024-06-14 13:04:15,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 169 transitions, 1834 flow [2024-06-14 13:04:15,976 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 169 transitions, 1787 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:15,980 INFO L231 Difference]: Finished difference. Result has 114 places, 138 transitions, 1437 flow [2024-06-14 13:04:15,980 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1313, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=136, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1437, PETRI_PLACES=114, PETRI_TRANSITIONS=138} [2024-06-14 13:04:15,981 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 13:04:15,981 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 138 transitions, 1437 flow [2024-06-14 13:04:15,981 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 13:04:15,981 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:15,981 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:15,981 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:04:15,981 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 13:04:15,982 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:15,982 INFO L85 PathProgramCache]: Analyzing trace with hash -564402571, now seen corresponding path program 1 times [2024-06-14 13:04:15,982 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:15,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1856329240] [2024-06-14 13:04:15,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:15,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:16,627 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:16,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:16,628 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1856329240] [2024-06-14 13:04:16,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1856329240] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:16,628 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:16,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:16,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677031058] [2024-06-14 13:04:16,628 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:16,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:16,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:16,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:16,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:16,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:16,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 138 transitions, 1437 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:16,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:16,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:16,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:17,270 INFO L124 PetriNetUnfolderBase]: 1974/2938 cut-off events. [2024-06-14 13:04:17,270 INFO L125 PetriNetUnfolderBase]: For 43926/43926 co-relation queries the response was YES. [2024-06-14 13:04:17,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18160 conditions, 2938 events. 1974/2938 cut-off events. For 43926/43926 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 13403 event pairs, 583 based on Foata normal form. 4/2940 useless extension candidates. Maximal degree in co-relation 18103. Up to 2839 conditions per place. [2024-06-14 13:04:17,288 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 21 changer transitions 0/180 dead transitions. [2024-06-14 13:04:17,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 180 transitions, 1997 flow [2024-06-14 13:04:17,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:17,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:17,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:04:17,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 13:04:17,290 INFO L175 Difference]: Start difference. First operand has 114 places, 138 transitions, 1437 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:04:17,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 180 transitions, 1997 flow [2024-06-14 13:04:17,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 180 transitions, 1901 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:17,324 INFO L231 Difference]: Finished difference. Result has 120 places, 150 transitions, 1548 flow [2024-06-14 13:04:17,324 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1347, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1548, PETRI_PLACES=120, PETRI_TRANSITIONS=150} [2024-06-14 13:04:17,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 78 predicate places. [2024-06-14 13:04:17,325 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 150 transitions, 1548 flow [2024-06-14 13:04:17,325 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:17,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:17,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:17,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:04:17,326 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 13:04:17,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:17,326 INFO L85 PathProgramCache]: Analyzing trace with hash 273191529, now seen corresponding path program 2 times [2024-06-14 13:04:17,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:17,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843885687] [2024-06-14 13:04:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:17,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:17,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:17,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:17,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843885687] [2024-06-14 13:04:17,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843885687] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:17,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:17,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:17,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074730016] [2024-06-14 13:04:17,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:17,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:17,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:17,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:17,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:18,069 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:18,070 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 150 transitions, 1548 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:18,070 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:18,070 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:18,070 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:18,623 INFO L124 PetriNetUnfolderBase]: 2124/3154 cut-off events. [2024-06-14 13:04:18,624 INFO L125 PetriNetUnfolderBase]: For 51339/51339 co-relation queries the response was YES. [2024-06-14 13:04:18,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19884 conditions, 3154 events. 2124/3154 cut-off events. For 51339/51339 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 14501 event pairs, 541 based on Foata normal form. 4/3156 useless extension candidates. Maximal degree in co-relation 19823. Up to 2855 conditions per place. [2024-06-14 13:04:18,647 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 160 selfloop transitions, 35 changer transitions 0/198 dead transitions. [2024-06-14 13:04:18,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 198 transitions, 2328 flow [2024-06-14 13:04:18,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:18,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:18,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:04:18,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 13:04:18,649 INFO L175 Difference]: Start difference. First operand has 120 places, 150 transitions, 1548 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:04:18,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 198 transitions, 2328 flow [2024-06-14 13:04:18,694 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 198 transitions, 2285 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:18,697 INFO L231 Difference]: Finished difference. Result has 128 places, 164 transitions, 1766 flow [2024-06-14 13:04:18,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1505, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1766, PETRI_PLACES=128, PETRI_TRANSITIONS=164} [2024-06-14 13:04:18,698 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 13:04:18,698 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 164 transitions, 1766 flow [2024-06-14 13:04:18,698 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:18,698 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:18,698 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:18,698 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:04:18,698 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 13:04:18,699 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:18,699 INFO L85 PathProgramCache]: Analyzing trace with hash -560677921, now seen corresponding path program 3 times [2024-06-14 13:04:18,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:18,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383132243] [2024-06-14 13:04:18,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:18,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:18,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:19,312 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:19,312 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:19,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383132243] [2024-06-14 13:04:19,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383132243] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:19,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:19,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:19,313 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036420449] [2024-06-14 13:04:19,313 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:19,313 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:19,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:19,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:19,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:19,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:19,353 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 164 transitions, 1766 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:19,353 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:19,353 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:19,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:19,863 INFO L124 PetriNetUnfolderBase]: 2110/3136 cut-off events. [2024-06-14 13:04:19,863 INFO L125 PetriNetUnfolderBase]: For 57836/57836 co-relation queries the response was YES. [2024-06-14 13:04:19,876 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20890 conditions, 3136 events. 2110/3136 cut-off events. For 57836/57836 co-relation queries the response was YES. Maximal size of possible extension queue 148. Compared 14424 event pairs, 532 based on Foata normal form. 8/3142 useless extension candidates. Maximal degree in co-relation 20825. Up to 2851 conditions per place. [2024-06-14 13:04:19,888 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 157 selfloop transitions, 38 changer transitions 0/198 dead transitions. [2024-06-14 13:04:19,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 198 transitions, 2366 flow [2024-06-14 13:04:19,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:19,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:19,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:04:19,889 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:04:19,889 INFO L175 Difference]: Start difference. First operand has 128 places, 164 transitions, 1766 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:04:19,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 198 transitions, 2366 flow [2024-06-14 13:04:19,947 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 198 transitions, 2284 flow, removed 33 selfloop flow, removed 3 redundant places. [2024-06-14 13:04:19,950 INFO L231 Difference]: Finished difference. Result has 134 places, 167 transitions, 1824 flow [2024-06-14 13:04:19,950 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1692, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1824, PETRI_PLACES=134, PETRI_TRANSITIONS=167} [2024-06-14 13:04:19,950 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 92 predicate places. [2024-06-14 13:04:19,950 INFO L495 AbstractCegarLoop]: Abstraction has has 134 places, 167 transitions, 1824 flow [2024-06-14 13:04:19,951 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:19,951 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:19,951 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:19,951 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:04:19,951 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:19,951 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:19,952 INFO L85 PathProgramCache]: Analyzing trace with hash 1451417638, now seen corresponding path program 1 times [2024-06-14 13:04:19,952 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:19,952 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154417013] [2024-06-14 13:04:19,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:19,952 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:19,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:20,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:20,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:20,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154417013] [2024-06-14 13:04:20,819 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154417013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:20,819 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:20,819 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:20,819 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248147991] [2024-06-14 13:04:20,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:20,819 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:20,820 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:20,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:20,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:20,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:20,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 167 transitions, 1824 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:20,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:20,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:20,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:21,451 INFO L124 PetriNetUnfolderBase]: 2099/3119 cut-off events. [2024-06-14 13:04:21,452 INFO L125 PetriNetUnfolderBase]: For 60320/60320 co-relation queries the response was YES. [2024-06-14 13:04:21,464 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20980 conditions, 3119 events. 2099/3119 cut-off events. For 60320/60320 co-relation queries the response was YES. Maximal size of possible extension queue 147. Compared 14355 event pairs, 576 based on Foata normal form. 2/3119 useless extension candidates. Maximal degree in co-relation 20912. Up to 3064 conditions per place. [2024-06-14 13:04:21,474 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 173 selfloop transitions, 18 changer transitions 0/194 dead transitions. [2024-06-14 13:04:21,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 194 transitions, 2296 flow [2024-06-14 13:04:21,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:21,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:21,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:04:21,475 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 13:04:21,476 INFO L175 Difference]: Start difference. First operand has 134 places, 167 transitions, 1824 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:04:21,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 194 transitions, 2296 flow [2024-06-14 13:04:21,535 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 194 transitions, 2237 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:21,537 INFO L231 Difference]: Finished difference. Result has 138 places, 169 transitions, 1837 flow [2024-06-14 13:04:21,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1767, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=167, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1837, PETRI_PLACES=138, PETRI_TRANSITIONS=169} [2024-06-14 13:04:21,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 13:04:21,538 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 169 transitions, 1837 flow [2024-06-14 13:04:21,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:21,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:21,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:21,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:04:21,539 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 13:04:21,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:21,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1233735989, now seen corresponding path program 4 times [2024-06-14 13:04:21,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:21,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457633630] [2024-06-14 13:04:21,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:21,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:21,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:22,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:22,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:22,235 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457633630] [2024-06-14 13:04:22,235 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457633630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:22,235 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:22,235 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:22,235 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973149748] [2024-06-14 13:04:22,235 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:22,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:22,236 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:22,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:22,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:22,303 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:22,303 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 169 transitions, 1837 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:22,303 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:22,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:22,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:22,942 INFO L124 PetriNetUnfolderBase]: 2197/3265 cut-off events. [2024-06-14 13:04:22,943 INFO L125 PetriNetUnfolderBase]: For 68682/68684 co-relation queries the response was YES. [2024-06-14 13:04:22,958 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21918 conditions, 3265 events. 2197/3265 cut-off events. For 68682/68684 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15153 event pairs, 523 based on Foata normal form. 10/3273 useless extension candidates. Maximal degree in co-relation 21849. Up to 2741 conditions per place. [2024-06-14 13:04:22,969 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 61 changer transitions 0/216 dead transitions. [2024-06-14 13:04:22,970 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 216 transitions, 2689 flow [2024-06-14 13:04:22,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:22,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:22,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:04:22,971 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 13:04:22,971 INFO L175 Difference]: Start difference. First operand has 138 places, 169 transitions, 1837 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:04:22,971 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 216 transitions, 2689 flow [2024-06-14 13:04:23,025 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 216 transitions, 2641 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:23,028 INFO L231 Difference]: Finished difference. Result has 142 places, 183 transitions, 2108 flow [2024-06-14 13:04:23,028 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1789, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2108, PETRI_PLACES=142, PETRI_TRANSITIONS=183} [2024-06-14 13:04:23,029 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 100 predicate places. [2024-06-14 13:04:23,029 INFO L495 AbstractCegarLoop]: Abstraction has has 142 places, 183 transitions, 2108 flow [2024-06-14 13:04:23,029 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:23,029 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:23,029 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:23,029 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:04:23,029 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 13:04:23,030 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:23,030 INFO L85 PathProgramCache]: Analyzing trace with hash -1233735772, now seen corresponding path program 2 times [2024-06-14 13:04:23,030 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:23,030 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788110462] [2024-06-14 13:04:23,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:23,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:23,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:23,922 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:23,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:23,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788110462] [2024-06-14 13:04:23,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1788110462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:23,923 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:23,923 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:23,923 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340075539] [2024-06-14 13:04:23,923 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:23,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:23,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:23,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:23,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:23,995 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:23,995 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 183 transitions, 2108 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:23,995 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:23,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:23,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:24,594 INFO L124 PetriNetUnfolderBase]: 2198/3268 cut-off events. [2024-06-14 13:04:24,594 INFO L125 PetriNetUnfolderBase]: For 75473/75493 co-relation queries the response was YES. [2024-06-14 13:04:24,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23081 conditions, 3268 events. 2198/3268 cut-off events. For 75473/75493 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15160 event pairs, 526 based on Foata normal form. 13/3278 useless extension candidates. Maximal degree in co-relation 23009. Up to 2921 conditions per place. [2024-06-14 13:04:24,621 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 162 selfloop transitions, 59 changer transitions 0/224 dead transitions. [2024-06-14 13:04:24,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 149 places, 224 transitions, 2884 flow [2024-06-14 13:04:24,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:24,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:24,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:04:24,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:04:24,623 INFO L175 Difference]: Start difference. First operand has 142 places, 183 transitions, 2108 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:04:24,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 149 places, 224 transitions, 2884 flow [2024-06-14 13:04:24,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 224 transitions, 2758 flow, removed 57 selfloop flow, removed 2 redundant places. [2024-06-14 13:04:24,701 INFO L231 Difference]: Finished difference. Result has 150 places, 195 transitions, 2334 flow [2024-06-14 13:04:24,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2022, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2334, PETRI_PLACES=150, PETRI_TRANSITIONS=195} [2024-06-14 13:04:24,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-14 13:04:24,702 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 195 transitions, 2334 flow [2024-06-14 13:04:24,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:24,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:24,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:24,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:04:24,703 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 13:04:24,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:24,703 INFO L85 PathProgramCache]: Analyzing trace with hash -1233468862, now seen corresponding path program 3 times [2024-06-14 13:04:24,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:24,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044228324] [2024-06-14 13:04:24,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:24,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:24,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:25,545 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:25,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:25,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044228324] [2024-06-14 13:04:25,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044228324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:25,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:25,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:25,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808205680] [2024-06-14 13:04:25,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:25,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:25,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:25,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:25,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:25,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:25,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 195 transitions, 2334 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:25,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:25,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:25,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:26,265 INFO L124 PetriNetUnfolderBase]: 2219/3297 cut-off events. [2024-06-14 13:04:26,265 INFO L125 PetriNetUnfolderBase]: For 79597/79617 co-relation queries the response was YES. [2024-06-14 13:04:26,281 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23546 conditions, 3297 events. 2219/3297 cut-off events. For 79597/79617 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15336 event pairs, 519 based on Foata normal form. 9/3303 useless extension candidates. Maximal degree in co-relation 23470. Up to 2823 conditions per place. [2024-06-14 13:04:26,293 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 152 selfloop transitions, 74 changer transitions 0/229 dead transitions. [2024-06-14 13:04:26,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 229 transitions, 3104 flow [2024-06-14 13:04:26,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:26,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:26,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-14 13:04:26,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 13:04:26,295 INFO L175 Difference]: Start difference. First operand has 150 places, 195 transitions, 2334 flow. Second operand 8 states and 140 transitions. [2024-06-14 13:04:26,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 229 transitions, 3104 flow [2024-06-14 13:04:26,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 229 transitions, 2998 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:26,371 INFO L231 Difference]: Finished difference. Result has 155 places, 199 transitions, 2472 flow [2024-06-14 13:04:26,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2472, PETRI_PLACES=155, PETRI_TRANSITIONS=199} [2024-06-14 13:04:26,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 113 predicate places. [2024-06-14 13:04:26,372 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 199 transitions, 2472 flow [2024-06-14 13:04:26,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:26,373 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:26,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:26,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:04:26,373 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 13:04:26,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:26,373 INFO L85 PathProgramCache]: Analyzing trace with hash 635426323, now seen corresponding path program 5 times [2024-06-14 13:04:26,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:26,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138155622] [2024-06-14 13:04:26,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:26,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:26,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:27,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138155622] [2024-06-14 13:04:27,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138155622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:27,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:27,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:27,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1508968307] [2024-06-14 13:04:27,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:27,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:27,071 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:27,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:27,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:27,161 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:27,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 199 transitions, 2472 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:27,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:27,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:27,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:27,737 INFO L124 PetriNetUnfolderBase]: 2241/3329 cut-off events. [2024-06-14 13:04:27,737 INFO L125 PetriNetUnfolderBase]: For 87271/87291 co-relation queries the response was YES. [2024-06-14 13:04:27,754 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24344 conditions, 3329 events. 2241/3329 cut-off events. For 87271/87291 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15465 event pairs, 531 based on Foata normal form. 11/3337 useless extension candidates. Maximal degree in co-relation 24266. Up to 2765 conditions per place. [2024-06-14 13:04:27,768 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 156 selfloop transitions, 77 changer transitions 0/236 dead transitions. [2024-06-14 13:04:27,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 236 transitions, 3386 flow [2024-06-14 13:04:27,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:27,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:27,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 146 transitions. [2024-06-14 13:04:27,769 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4451219512195122 [2024-06-14 13:04:27,770 INFO L175 Difference]: Start difference. First operand has 155 places, 199 transitions, 2472 flow. Second operand 8 states and 146 transitions. [2024-06-14 13:04:27,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 236 transitions, 3386 flow [2024-06-14 13:04:27,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 236 transitions, 3216 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:27,863 INFO L231 Difference]: Finished difference. Result has 157 places, 203 transitions, 2538 flow [2024-06-14 13:04:27,864 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=199, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2538, PETRI_PLACES=157, PETRI_TRANSITIONS=203} [2024-06-14 13:04:27,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 115 predicate places. [2024-06-14 13:04:27,865 INFO L495 AbstractCegarLoop]: Abstraction has has 157 places, 203 transitions, 2538 flow [2024-06-14 13:04:27,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:27,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:27,865 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:27,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:04:27,866 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 13:04:27,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:27,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1595308168, now seen corresponding path program 4 times [2024-06-14 13:04:27,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:27,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310729320] [2024-06-14 13:04:27,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:27,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:27,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:28,789 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:28,790 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:28,790 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310729320] [2024-06-14 13:04:28,790 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [310729320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:28,790 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:28,790 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:28,790 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434212704] [2024-06-14 13:04:28,790 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:28,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:28,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:28,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:28,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:28,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:28,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 203 transitions, 2538 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:28,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:28,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:28,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:29,478 INFO L124 PetriNetUnfolderBase]: 2236/3320 cut-off events. [2024-06-14 13:04:29,479 INFO L125 PetriNetUnfolderBase]: For 91255/91277 co-relation queries the response was YES. [2024-06-14 13:04:29,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24463 conditions, 3320 events. 2236/3320 cut-off events. For 91255/91277 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15429 event pairs, 561 based on Foata normal form. 18/3335 useless extension candidates. Maximal degree in co-relation 24384. Up to 3218 conditions per place. [2024-06-14 13:04:29,503 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 29 changer transitions 0/228 dead transitions. [2024-06-14 13:04:29,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 228 transitions, 3074 flow [2024-06-14 13:04:29,504 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:29,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:29,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:04:29,505 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:04:29,505 INFO L175 Difference]: Start difference. First operand has 157 places, 203 transitions, 2538 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:04:29,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 228 transitions, 3074 flow [2024-06-14 13:04:29,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 228 transitions, 2902 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:29,598 INFO L231 Difference]: Finished difference. Result has 161 places, 205 transitions, 2462 flow [2024-06-14 13:04:29,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2372, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2462, PETRI_PLACES=161, PETRI_TRANSITIONS=205} [2024-06-14 13:04:29,599 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 119 predicate places. [2024-06-14 13:04:29,599 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 205 transitions, 2462 flow [2024-06-14 13:04:29,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:29,599 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:29,599 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:29,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:04:29,599 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 13:04:29,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:29,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1595307951, now seen corresponding path program 6 times [2024-06-14 13:04:29,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:29,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91710530] [2024-06-14 13:04:29,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:29,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:29,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:30,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:30,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:30,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91710530] [2024-06-14 13:04:30,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91710530] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:30,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:30,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:30,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860985204] [2024-06-14 13:04:30,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:30,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:30,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:30,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:30,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:30,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:30,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 205 transitions, 2462 flow. Second operand has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:30,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:30,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:30,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:30,886 INFO L124 PetriNetUnfolderBase]: 2216/3294 cut-off events. [2024-06-14 13:04:30,886 INFO L125 PetriNetUnfolderBase]: For 94955/94975 co-relation queries the response was YES. [2024-06-14 13:04:30,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23789 conditions, 3294 events. 2216/3294 cut-off events. For 94955/94975 co-relation queries the response was YES. Maximal size of possible extension queue 149. Compared 15270 event pairs, 534 based on Foata normal form. 15/3306 useless extension candidates. Maximal degree in co-relation 23710. Up to 2750 conditions per place. [2024-06-14 13:04:30,915 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 159 selfloop transitions, 74 changer transitions 0/236 dead transitions. [2024-06-14 13:04:30,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 236 transitions, 3220 flow [2024-06-14 13:04:30,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:30,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:30,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:04:30,917 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 13:04:30,917 INFO L175 Difference]: Start difference. First operand has 161 places, 205 transitions, 2462 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:04:30,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 236 transitions, 3220 flow [2024-06-14 13:04:31,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 236 transitions, 3128 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:31,020 INFO L231 Difference]: Finished difference. Result has 163 places, 205 transitions, 2530 flow [2024-06-14 13:04:31,020 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2370, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2530, PETRI_PLACES=163, PETRI_TRANSITIONS=205} [2024-06-14 13:04:31,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 13:04:31,021 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 205 transitions, 2530 flow [2024-06-14 13:04:31,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:31,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:31,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:31,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:04:31,021 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:31,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:31,022 INFO L85 PathProgramCache]: Analyzing trace with hash -924280083, now seen corresponding path program 1 times [2024-06-14 13:04:31,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:31,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1015396714] [2024-06-14 13:04:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:31,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:31,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:31,665 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 13:04:31,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:31,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1015396714] [2024-06-14 13:04:31,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1015396714] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:31,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:31,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:04:31,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511308313] [2024-06-14 13:04:31,668 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:31,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:04:31,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:31,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:04:31,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:04:31,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:31,718 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 205 transitions, 2530 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:31,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:31,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:31,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:32,362 INFO L124 PetriNetUnfolderBase]: 2152/3194 cut-off events. [2024-06-14 13:04:32,362 INFO L125 PetriNetUnfolderBase]: For 96428/96450 co-relation queries the response was YES. [2024-06-14 13:04:32,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23475 conditions, 3194 events. 2152/3194 cut-off events. For 96428/96450 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 14772 event pairs, 546 based on Foata normal form. 20/3211 useless extension candidates. Maximal degree in co-relation 23395. Up to 3136 conditions per place. [2024-06-14 13:04:32,386 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 190 selfloop transitions, 20 changer transitions 0/213 dead transitions. [2024-06-14 13:04:32,386 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 167 places, 213 transitions, 2972 flow [2024-06-14 13:04:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:04:32,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:04:32,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 84 transitions. [2024-06-14 13:04:32,387 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-14 13:04:32,387 INFO L175 Difference]: Start difference. First operand has 163 places, 205 transitions, 2530 flow. Second operand 5 states and 84 transitions. [2024-06-14 13:04:32,388 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 167 places, 213 transitions, 2972 flow [2024-06-14 13:04:32,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 213 transitions, 2820 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:32,475 INFO L231 Difference]: Finished difference. Result has 163 places, 205 transitions, 2429 flow [2024-06-14 13:04:32,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2378, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2429, PETRI_PLACES=163, PETRI_TRANSITIONS=205} [2024-06-14 13:04:32,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 13:04:32,476 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 205 transitions, 2429 flow [2024-06-14 13:04:32,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:32,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:32,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:32,477 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:04:32,477 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 13:04:32,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:32,477 INFO L85 PathProgramCache]: Analyzing trace with hash -451885852, now seen corresponding path program 1 times [2024-06-14 13:04:32,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:32,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967176296] [2024-06-14 13:04:32,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:32,478 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:32,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:33,314 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:33,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:33,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967176296] [2024-06-14 13:04:33,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967176296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:33,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:33,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:33,315 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123147818] [2024-06-14 13:04:33,315 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:33,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:33,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:33,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:33,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:33,401 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:33,402 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 205 transitions, 2429 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 13:04:33,402 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:33,402 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:33,402 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:34,193 INFO L124 PetriNetUnfolderBase]: 2172/3249 cut-off events. [2024-06-14 13:04:34,193 INFO L125 PetriNetUnfolderBase]: For 111922/111944 co-relation queries the response was YES. [2024-06-14 13:04:34,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23956 conditions, 3249 events. 2172/3249 cut-off events. For 111922/111944 co-relation queries the response was YES. Maximal size of possible extension queue 153. Compared 15405 event pairs, 361 based on Foata normal form. 22/3220 useless extension candidates. Maximal degree in co-relation 23875. Up to 2833 conditions per place. [2024-06-14 13:04:34,220 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 177 selfloop transitions, 39 changer transitions 0/253 dead transitions. [2024-06-14 13:04:34,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 253 transitions, 3155 flow [2024-06-14 13:04:34,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:34,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 158 transitions. [2024-06-14 13:04:34,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4817073170731707 [2024-06-14 13:04:34,226 INFO L175 Difference]: Start difference. First operand has 163 places, 205 transitions, 2429 flow. Second operand 8 states and 158 transitions. [2024-06-14 13:04:34,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 253 transitions, 3155 flow [2024-06-14 13:04:34,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 166 places, 253 transitions, 3102 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:34,320 INFO L231 Difference]: Finished difference. Result has 168 places, 210 transitions, 2535 flow [2024-06-14 13:04:34,321 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2376, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2535, PETRI_PLACES=168, PETRI_TRANSITIONS=210} [2024-06-14 13:04:34,323 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-14 13:04:34,323 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 210 transitions, 2535 flow [2024-06-14 13:04:34,323 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 13:04:34,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:34,323 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:34,324 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:04:34,324 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 13:04:34,324 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:34,324 INFO L85 PathProgramCache]: Analyzing trace with hash 1926003314, now seen corresponding path program 1 times [2024-06-14 13:04:34,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:34,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025178279] [2024-06-14 13:04:34,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:34,325 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:34,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:35,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:35,238 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:35,238 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025178279] [2024-06-14 13:04:35,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025178279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:35,238 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:35,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:35,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188647431] [2024-06-14 13:04:35,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:35,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:35,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:35,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:35,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:35,348 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:35,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 210 transitions, 2535 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:35,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:35,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:35,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:36,033 INFO L124 PetriNetUnfolderBase]: 2244/3336 cut-off events. [2024-06-14 13:04:36,034 INFO L125 PetriNetUnfolderBase]: For 106291/106291 co-relation queries the response was YES. [2024-06-14 13:04:36,051 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24979 conditions, 3336 events. 2244/3336 cut-off events. For 106291/106291 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 15662 event pairs, 532 based on Foata normal form. 2/3336 useless extension candidates. Maximal degree in co-relation 24897. Up to 3219 conditions per place. [2024-06-14 13:04:36,063 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 211 selfloop transitions, 26 changer transitions 0/240 dead transitions. [2024-06-14 13:04:36,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 240 transitions, 3097 flow [2024-06-14 13:04:36,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:36,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:36,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:04:36,067 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 13:04:36,067 INFO L175 Difference]: Start difference. First operand has 168 places, 210 transitions, 2535 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:04:36,067 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 240 transitions, 3097 flow [2024-06-14 13:04:36,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 240 transitions, 2996 flow, removed 17 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:36,172 INFO L231 Difference]: Finished difference. Result has 171 places, 210 transitions, 2498 flow [2024-06-14 13:04:36,175 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2434, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2498, PETRI_PLACES=171, PETRI_TRANSITIONS=210} [2024-06-14 13:04:36,176 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 13:04:36,176 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 210 transitions, 2498 flow [2024-06-14 13:04:36,176 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:36,176 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:36,177 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:36,177 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:04:36,177 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 13:04:36,177 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:36,177 INFO L85 PathProgramCache]: Analyzing trace with hash -319410268, now seen corresponding path program 2 times [2024-06-14 13:04:36,177 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:36,177 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054941164] [2024-06-14 13:04:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:36,178 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:36,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:37,158 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:37,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:37,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054941164] [2024-06-14 13:04:37,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1054941164] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:37,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:37,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:37,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775501981] [2024-06-14 13:04:37,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:37,159 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:37,159 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:37,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:37,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:37,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:37,240 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 210 transitions, 2498 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 13:04:37,240 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:37,240 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:37,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:38,131 INFO L124 PetriNetUnfolderBase]: 2221/3332 cut-off events. [2024-06-14 13:04:38,131 INFO L125 PetriNetUnfolderBase]: For 126512/126537 co-relation queries the response was YES. [2024-06-14 13:04:38,149 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25364 conditions, 3332 events. 2221/3332 cut-off events. For 126512/126537 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15992 event pairs, 489 based on Foata normal form. 20/3304 useless extension candidates. Maximal degree in co-relation 25281. Up to 2937 conditions per place. [2024-06-14 13:04:38,162 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 169 selfloop transitions, 47 changer transitions 0/253 dead transitions. [2024-06-14 13:04:38,163 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 253 transitions, 3206 flow [2024-06-14 13:04:38,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:38,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:38,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 156 transitions. [2024-06-14 13:04:38,164 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47560975609756095 [2024-06-14 13:04:38,164 INFO L175 Difference]: Start difference. First operand has 171 places, 210 transitions, 2498 flow. Second operand 8 states and 156 transitions. [2024-06-14 13:04:38,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 253 transitions, 3206 flow [2024-06-14 13:04:38,265 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 253 transitions, 3158 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:04:38,268 INFO L231 Difference]: Finished difference. Result has 175 places, 212 transitions, 2600 flow [2024-06-14 13:04:38,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2450, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=163, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2600, PETRI_PLACES=175, PETRI_TRANSITIONS=212} [2024-06-14 13:04:38,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 133 predicate places. [2024-06-14 13:04:38,269 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 212 transitions, 2600 flow [2024-06-14 13:04:38,269 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 13:04:38,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:38,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:38,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:04:38,269 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:38,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:38,269 INFO L85 PathProgramCache]: Analyzing trace with hash -316608798, now seen corresponding path program 1 times [2024-06-14 13:04:38,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:38,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708970826] [2024-06-14 13:04:38,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:38,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:38,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:39,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:39,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:39,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708970826] [2024-06-14 13:04:39,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708970826] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:39,170 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:39,170 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:39,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913087893] [2024-06-14 13:04:39,170 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:39,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:39,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:39,228 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:39,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 212 transitions, 2600 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:39,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:39,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:39,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:39,950 INFO L124 PetriNetUnfolderBase]: 2335/3475 cut-off events. [2024-06-14 13:04:39,951 INFO L125 PetriNetUnfolderBase]: For 122026/122026 co-relation queries the response was YES. [2024-06-14 13:04:39,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26395 conditions, 3475 events. 2335/3475 cut-off events. For 122026/122026 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16516 event pairs, 523 based on Foata normal form. 4/3477 useless extension candidates. Maximal degree in co-relation 26311. Up to 3353 conditions per place. [2024-06-14 13:04:39,981 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 223 selfloop transitions, 24 changer transitions 0/250 dead transitions. [2024-06-14 13:04:39,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 250 transitions, 3239 flow [2024-06-14 13:04:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:39,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:04:39,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 13:04:39,983 INFO L175 Difference]: Start difference. First operand has 175 places, 212 transitions, 2600 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:04:39,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 250 transitions, 3239 flow [2024-06-14 13:04:40,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 250 transitions, 3095 flow, removed 10 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:40,095 INFO L231 Difference]: Finished difference. Result has 177 places, 215 transitions, 2559 flow [2024-06-14 13:04:40,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2459, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=212, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2559, PETRI_PLACES=177, PETRI_TRANSITIONS=215} [2024-06-14 13:04:40,096 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-14 13:04:40,096 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 215 transitions, 2559 flow [2024-06-14 13:04:40,096 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:40,096 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:40,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:40,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:04:40,096 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 13:04:40,097 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:40,097 INFO L85 PathProgramCache]: Analyzing trace with hash -201144648, now seen corresponding path program 2 times [2024-06-14 13:04:40,097 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:40,097 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342127729] [2024-06-14 13:04:40,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:40,097 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:40,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:41,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:41,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:41,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342127729] [2024-06-14 13:04:41,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342127729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:41,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:41,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:41,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058821808] [2024-06-14 13:04:41,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:41,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:41,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:41,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:41,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:41,169 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:41,169 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 215 transitions, 2559 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:41,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:41,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:41,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:41,806 INFO L124 PetriNetUnfolderBase]: 2357/3507 cut-off events. [2024-06-14 13:04:41,806 INFO L125 PetriNetUnfolderBase]: For 126917/126917 co-relation queries the response was YES. [2024-06-14 13:04:41,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26620 conditions, 3507 events. 2357/3507 cut-off events. For 126917/126917 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16700 event pairs, 516 based on Foata normal form. 4/3509 useless extension candidates. Maximal degree in co-relation 26535. Up to 3290 conditions per place. [2024-06-14 13:04:41,835 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 206 selfloop transitions, 42 changer transitions 0/251 dead transitions. [2024-06-14 13:04:41,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 251 transitions, 3199 flow [2024-06-14 13:04:41,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:41,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:41,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:04:41,837 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 13:04:41,837 INFO L175 Difference]: Start difference. First operand has 177 places, 215 transitions, 2559 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:04:41,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 251 transitions, 3199 flow [2024-06-14 13:04:41,958 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 251 transitions, 3149 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:41,961 INFO L231 Difference]: Finished difference. Result has 181 places, 218 transitions, 2651 flow [2024-06-14 13:04:41,961 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2509, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2651, PETRI_PLACES=181, PETRI_TRANSITIONS=218} [2024-06-14 13:04:41,961 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 139 predicate places. [2024-06-14 13:04:41,961 INFO L495 AbstractCegarLoop]: Abstraction has has 181 places, 218 transitions, 2651 flow [2024-06-14 13:04:41,961 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:41,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:41,962 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:41,962 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:04:41,962 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 13:04:41,962 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:41,962 INFO L85 PathProgramCache]: Analyzing trace with hash -201137890, now seen corresponding path program 1 times [2024-06-14 13:04:41,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:41,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662395452] [2024-06-14 13:04:41,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:41,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:41,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:42,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:42,886 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:42,886 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662395452] [2024-06-14 13:04:42,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662395452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:42,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:42,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:42,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290699349] [2024-06-14 13:04:42,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:42,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:42,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:42,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:42,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:42,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:42,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 218 transitions, 2651 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:42,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:42,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:42,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:43,652 INFO L124 PetriNetUnfolderBase]: 2374/3534 cut-off events. [2024-06-14 13:04:43,653 INFO L125 PetriNetUnfolderBase]: For 134939/134939 co-relation queries the response was YES. [2024-06-14 13:04:43,669 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27116 conditions, 3534 events. 2374/3534 cut-off events. For 134939/134939 co-relation queries the response was YES. Maximal size of possible extension queue 155. Compared 16834 event pairs, 536 based on Foata normal form. 4/3536 useless extension candidates. Maximal degree in co-relation 27030. Up to 3461 conditions per place. [2024-06-14 13:04:43,682 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 227 selfloop transitions, 20 changer transitions 0/250 dead transitions. [2024-06-14 13:04:43,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 250 transitions, 3255 flow [2024-06-14 13:04:43,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:43,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:43,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:04:43,684 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 13:04:43,684 INFO L175 Difference]: Start difference. First operand has 181 places, 218 transitions, 2651 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:04:43,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 250 transitions, 3255 flow [2024-06-14 13:04:43,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 250 transitions, 3159 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:43,838 INFO L231 Difference]: Finished difference. Result has 184 places, 220 transitions, 2638 flow [2024-06-14 13:04:43,838 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2555, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2638, PETRI_PLACES=184, PETRI_TRANSITIONS=220} [2024-06-14 13:04:43,838 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 142 predicate places. [2024-06-14 13:04:43,839 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 220 transitions, 2638 flow [2024-06-14 13:04:43,839 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:43,839 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:43,839 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:43,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:04:43,839 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 13:04:43,839 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:43,839 INFO L85 PathProgramCache]: Analyzing trace with hash -201322588, now seen corresponding path program 3 times [2024-06-14 13:04:43,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:43,840 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425083988] [2024-06-14 13:04:43,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:43,840 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:44,653 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:44,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:44,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425083988] [2024-06-14 13:04:44,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425083988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:44,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:44,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:44,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918414637] [2024-06-14 13:04:44,654 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:44,654 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:44,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:44,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:44,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:44,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:44,746 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 220 transitions, 2638 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 13:04:44,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:44,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:44,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:45,553 INFO L124 PetriNetUnfolderBase]: 2355/3542 cut-off events. [2024-06-14 13:04:45,554 INFO L125 PetriNetUnfolderBase]: For 158858/158887 co-relation queries the response was YES. [2024-06-14 13:04:45,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27743 conditions, 3542 events. 2355/3542 cut-off events. For 158858/158887 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17259 event pairs, 490 based on Foata normal form. 20/3512 useless extension candidates. Maximal degree in co-relation 27656. Up to 3073 conditions per place. [2024-06-14 13:04:45,582 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 164 selfloop transitions, 59 changer transitions 0/263 dead transitions. [2024-06-14 13:04:45,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 263 transitions, 3448 flow [2024-06-14 13:04:45,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:45,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:45,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2024-06-14 13:04:45,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.47865853658536583 [2024-06-14 13:04:45,583 INFO L175 Difference]: Start difference. First operand has 184 places, 220 transitions, 2638 flow. Second operand 8 states and 157 transitions. [2024-06-14 13:04:45,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 263 transitions, 3448 flow [2024-06-14 13:04:45,705 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 263 transitions, 3383 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:45,708 INFO L231 Difference]: Finished difference. Result has 185 places, 222 transitions, 2748 flow [2024-06-14 13:04:45,709 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=220, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2748, PETRI_PLACES=185, PETRI_TRANSITIONS=222} [2024-06-14 13:04:45,709 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-14 13:04:45,709 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 222 transitions, 2748 flow [2024-06-14 13:04:45,709 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 13:04:45,709 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:45,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:45,710 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:04:45,710 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 13:04:45,710 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:45,710 INFO L85 PathProgramCache]: Analyzing trace with hash 2044095830, now seen corresponding path program 3 times [2024-06-14 13:04:45,710 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:45,710 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775108485] [2024-06-14 13:04:45,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:45,710 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:45,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:46,448 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:46,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:46,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775108485] [2024-06-14 13:04:46,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775108485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:46,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:46,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:04:46,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347438973] [2024-06-14 13:04:46,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:46,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:04:46,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:04:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:04:46,506 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:46,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 222 transitions, 2748 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:46,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:46,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:46,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:47,179 INFO L124 PetriNetUnfolderBase]: 2446/3650 cut-off events. [2024-06-14 13:04:47,179 INFO L125 PetriNetUnfolderBase]: For 149679/149679 co-relation queries the response was YES. [2024-06-14 13:04:47,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28459 conditions, 3650 events. 2446/3650 cut-off events. For 149679/149679 co-relation queries the response was YES. Maximal size of possible extension queue 159. Compared 17570 event pairs, 549 based on Foata normal form. 4/3652 useless extension candidates. Maximal degree in co-relation 28371. Up to 3373 conditions per place. [2024-06-14 13:04:47,218 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 197 selfloop transitions, 50 changer transitions 0/250 dead transitions. [2024-06-14 13:04:47,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 250 transitions, 3326 flow [2024-06-14 13:04:47,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:47,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:47,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:04:47,220 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 13:04:47,220 INFO L175 Difference]: Start difference. First operand has 185 places, 222 transitions, 2748 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:04:47,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 250 transitions, 3326 flow [2024-06-14 13:04:47,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 186 places, 250 transitions, 3181 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:47,404 INFO L231 Difference]: Finished difference. Result has 187 places, 222 transitions, 2724 flow [2024-06-14 13:04:47,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2603, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2724, PETRI_PLACES=187, PETRI_TRANSITIONS=222} [2024-06-14 13:04:47,404 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 145 predicate places. [2024-06-14 13:04:47,404 INFO L495 AbstractCegarLoop]: Abstraction has has 187 places, 222 transitions, 2724 flow [2024-06-14 13:04:47,404 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:47,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:47,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:47,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:04:47,405 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 13:04:47,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:47,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1548537860, now seen corresponding path program 2 times [2024-06-14 13:04:47,405 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:47,405 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457976551] [2024-06-14 13:04:47,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:47,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:47,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:48,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:48,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:48,386 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457976551] [2024-06-14 13:04:48,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457976551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:48,386 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:48,386 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:48,386 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34447194] [2024-06-14 13:04:48,387 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:48,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:48,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:48,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:48,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:48,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:48,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 222 transitions, 2724 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:48,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:48,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:48,464 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:49,188 INFO L124 PetriNetUnfolderBase]: 2538/3805 cut-off events. [2024-06-14 13:04:49,188 INFO L125 PetriNetUnfolderBase]: For 169527/169529 co-relation queries the response was YES. [2024-06-14 13:04:49,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29133 conditions, 3805 events. 2538/3805 cut-off events. For 169527/169529 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18644 event pairs, 532 based on Foata normal form. 26/3829 useless extension candidates. Maximal degree in co-relation 29044. Up to 3316 conditions per place. [2024-06-14 13:04:49,222 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 192 selfloop transitions, 65 changer transitions 0/260 dead transitions. [2024-06-14 13:04:49,222 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 260 transitions, 3398 flow [2024-06-14 13:04:49,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:04:49,224 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:04:49,224 INFO L175 Difference]: Start difference. First operand has 187 places, 222 transitions, 2724 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:04:49,224 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 260 transitions, 3398 flow [2024-06-14 13:04:49,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 260 transitions, 3247 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 13:04:49,379 INFO L231 Difference]: Finished difference. Result has 188 places, 224 transitions, 2751 flow [2024-06-14 13:04:49,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2573, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=222, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2751, PETRI_PLACES=188, PETRI_TRANSITIONS=224} [2024-06-14 13:04:49,379 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 13:04:49,379 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 224 transitions, 2751 flow [2024-06-14 13:04:49,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:49,379 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:49,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:49,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:04:49,380 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 13:04:49,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:49,380 INFO L85 PathProgramCache]: Analyzing trace with hash -1540263650, now seen corresponding path program 3 times [2024-06-14 13:04:49,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:49,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624538829] [2024-06-14 13:04:49,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:49,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:50,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:50,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:50,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624538829] [2024-06-14 13:04:50,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624538829] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:50,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:50,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:50,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [722834700] [2024-06-14 13:04:50,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:50,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:50,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:50,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:50,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:50,451 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:50,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 224 transitions, 2751 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:50,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:50,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:50,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:51,218 INFO L124 PetriNetUnfolderBase]: 2555/3830 cut-off events. [2024-06-14 13:04:51,218 INFO L125 PetriNetUnfolderBase]: For 144789/144793 co-relation queries the response was YES. [2024-06-14 13:04:51,242 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29173 conditions, 3830 events. 2555/3830 cut-off events. For 144789/144793 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18809 event pairs, 580 based on Foata normal form. 8/3836 useless extension candidates. Maximal degree in co-relation 29083. Up to 3657 conditions per place. [2024-06-14 13:04:51,259 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 46 changer transitions 0/261 dead transitions. [2024-06-14 13:04:51,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 261 transitions, 3429 flow [2024-06-14 13:04:51,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:04:51,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:04:51,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:04:51,262 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-14 13:04:51,262 INFO L175 Difference]: Start difference. First operand has 188 places, 224 transitions, 2751 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:04:51,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 261 transitions, 3429 flow [2024-06-14 13:04:51,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 261 transitions, 3265 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:51,415 INFO L231 Difference]: Finished difference. Result has 192 places, 229 transitions, 2787 flow [2024-06-14 13:04:51,415 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2597, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=224, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2787, PETRI_PLACES=192, PETRI_TRANSITIONS=229} [2024-06-14 13:04:51,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 150 predicate places. [2024-06-14 13:04:51,416 INFO L495 AbstractCegarLoop]: Abstraction has has 192 places, 229 transitions, 2787 flow [2024-06-14 13:04:51,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:51,416 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:51,416 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:51,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:04:51,416 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:51,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:51,417 INFO L85 PathProgramCache]: Analyzing trace with hash -1539966980, now seen corresponding path program 4 times [2024-06-14 13:04:51,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:51,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1650935749] [2024-06-14 13:04:51,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:51,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:51,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:52,367 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:52,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:52,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1650935749] [2024-06-14 13:04:52,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1650935749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:52,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:52,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:52,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031837330] [2024-06-14 13:04:52,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:52,368 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:52,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:52,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:52,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:52,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:52,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 192 places, 229 transitions, 2787 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:52,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:52,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:52,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:53,194 INFO L124 PetriNetUnfolderBase]: 2572/3857 cut-off events. [2024-06-14 13:04:53,194 INFO L125 PetriNetUnfolderBase]: For 152462/152466 co-relation queries the response was YES. [2024-06-14 13:04:53,217 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29513 conditions, 3857 events. 2572/3857 cut-off events. For 152462/152466 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 18992 event pairs, 545 based on Foata normal form. 8/3863 useless extension candidates. Maximal degree in co-relation 29421. Up to 3601 conditions per place. [2024-06-14 13:04:53,232 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 209 selfloop transitions, 52 changer transitions 0/264 dead transitions. [2024-06-14 13:04:53,232 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 200 places, 264 transitions, 3613 flow [2024-06-14 13:04:53,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:53,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:53,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:04:53,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 13:04:53,234 INFO L175 Difference]: Start difference. First operand has 192 places, 229 transitions, 2787 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:04:53,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 200 places, 264 transitions, 3613 flow [2024-06-14 13:04:53,426 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 193 places, 264 transitions, 3499 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:04:53,430 INFO L231 Difference]: Finished difference. Result has 194 places, 233 transitions, 2876 flow [2024-06-14 13:04:53,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2673, PETRI_DIFFERENCE_MINUEND_PLACES=185, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=229, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=179, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2876, PETRI_PLACES=194, PETRI_TRANSITIONS=233} [2024-06-14 13:04:53,432 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 152 predicate places. [2024-06-14 13:04:53,432 INFO L495 AbstractCegarLoop]: Abstraction has has 194 places, 233 transitions, 2876 flow [2024-06-14 13:04:53,432 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:53,432 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:53,432 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:53,432 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:04:53,432 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:53,433 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:53,433 INFO L85 PathProgramCache]: Analyzing trace with hash -1776439010, now seen corresponding path program 5 times [2024-06-14 13:04:53,433 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:53,433 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965409549] [2024-06-14 13:04:53,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:53,433 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:53,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:54,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:54,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:54,305 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965409549] [2024-06-14 13:04:54,305 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965409549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:54,305 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:54,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:54,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498738846] [2024-06-14 13:04:54,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:54,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:54,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:54,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:54,408 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:54,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 194 places, 233 transitions, 2876 flow. Second operand has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:54,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:54,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:54,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:55,208 INFO L124 PetriNetUnfolderBase]: 2629/3958 cut-off events. [2024-06-14 13:04:55,208 INFO L125 PetriNetUnfolderBase]: For 170518/170520 co-relation queries the response was YES. [2024-06-14 13:04:55,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29887 conditions, 3958 events. 2629/3958 cut-off events. For 170518/170520 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 19686 event pairs, 555 based on Foata normal form. 30/3986 useless extension candidates. Maximal degree in co-relation 29794. Up to 3459 conditions per place. [2024-06-14 13:04:55,242 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 64 changer transitions 0/270 dead transitions. [2024-06-14 13:04:55,243 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 270 transitions, 3552 flow [2024-06-14 13:04:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:55,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:55,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:04:55,244 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 13:04:55,244 INFO L175 Difference]: Start difference. First operand has 194 places, 233 transitions, 2876 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:04:55,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 270 transitions, 3552 flow [2024-06-14 13:04:55,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 270 transitions, 3426 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:04:55,418 INFO L231 Difference]: Finished difference. Result has 199 places, 234 transitions, 2921 flow [2024-06-14 13:04:55,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2750, PETRI_DIFFERENCE_MINUEND_PLACES=189, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=233, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2921, PETRI_PLACES=199, PETRI_TRANSITIONS=234} [2024-06-14 13:04:55,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 157 predicate places. [2024-06-14 13:04:55,418 INFO L495 AbstractCegarLoop]: Abstraction has has 199 places, 234 transitions, 2921 flow [2024-06-14 13:04:55,419 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.4) internal successors, (84), 10 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:55,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:55,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:55,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:04:55,419 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:04:55,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:55,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1776623708, now seen corresponding path program 4 times [2024-06-14 13:04:55,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:55,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554912115] [2024-06-14 13:04:55,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:55,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:55,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:56,418 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:56,418 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:56,418 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554912115] [2024-06-14 13:04:56,418 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554912115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:56,419 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:56,419 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:04:56,419 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918230327] [2024-06-14 13:04:56,419 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:56,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:04:56,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:56,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:04:56,421 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:04:56,484 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:04:56,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 234 transitions, 2921 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 13:04:56,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:56,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:04:56,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:57,228 INFO L124 PetriNetUnfolderBase]: 2559/3897 cut-off events. [2024-06-14 13:04:57,228 INFO L125 PetriNetUnfolderBase]: For 184498/184539 co-relation queries the response was YES. [2024-06-14 13:04:57,252 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30031 conditions, 3897 events. 2559/3897 cut-off events. For 184498/184539 co-relation queries the response was YES. Maximal size of possible extension queue 173. Compared 19827 event pairs, 535 based on Foata normal form. 20/3859 useless extension candidates. Maximal degree in co-relation 29935. Up to 3224 conditions per place. [2024-06-14 13:04:57,268 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 159 selfloop transitions, 70 changer transitions 0/276 dead transitions. [2024-06-14 13:04:57,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 276 transitions, 3859 flow [2024-06-14 13:04:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:04:57,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:04:57,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-14 13:04:57,270 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4695121951219512 [2024-06-14 13:04:57,270 INFO L175 Difference]: Start difference. First operand has 199 places, 234 transitions, 2921 flow. Second operand 8 states and 154 transitions. [2024-06-14 13:04:57,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 276 transitions, 3859 flow [2024-06-14 13:04:57,485 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 276 transitions, 3603 flow, removed 17 selfloop flow, removed 9 redundant places. [2024-06-14 13:04:57,488 INFO L231 Difference]: Finished difference. Result has 198 places, 236 transitions, 2872 flow [2024-06-14 13:04:57,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2671, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2872, PETRI_PLACES=198, PETRI_TRANSITIONS=236} [2024-06-14 13:04:57,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 13:04:57,489 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 236 transitions, 2872 flow [2024-06-14 13:04:57,489 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 13:04:57,489 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:57,489 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:57,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:04:57,490 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 13:04:57,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:57,490 INFO L85 PathProgramCache]: Analyzing trace with hash -312270390, now seen corresponding path program 1 times [2024-06-14 13:04:57,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:57,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1583393954] [2024-06-14 13:04:57,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:57,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:57,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:04:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:04:58,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:04:58,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1583393954] [2024-06-14 13:04:58,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1583393954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:04:58,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:04:58,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:04:58,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232348021] [2024-06-14 13:04:58,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:04:58,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:04:58,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:04:58,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:04:58,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:04:58,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:04:58,503 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 236 transitions, 2872 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:58,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:04:58,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:04:58,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:04:59,302 INFO L124 PetriNetUnfolderBase]: 2693/4059 cut-off events. [2024-06-14 13:04:59,303 INFO L125 PetriNetUnfolderBase]: For 165302/165302 co-relation queries the response was YES. [2024-06-14 13:04:59,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30830 conditions, 4059 events. 2693/4059 cut-off events. For 165302/165302 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 20258 event pairs, 438 based on Foata normal form. 4/4061 useless extension candidates. Maximal degree in co-relation 30733. Up to 3925 conditions per place. [2024-06-14 13:04:59,349 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 254 selfloop transitions, 20 changer transitions 0/277 dead transitions. [2024-06-14 13:04:59,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 277 transitions, 3616 flow [2024-06-14 13:04:59,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:04:59,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:04:59,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:04:59,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 13:04:59,351 INFO L175 Difference]: Start difference. First operand has 198 places, 236 transitions, 2872 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:04:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 277 transitions, 3616 flow [2024-06-14 13:04:59,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 277 transitions, 3453 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:04:59,516 INFO L231 Difference]: Finished difference. Result has 203 places, 242 transitions, 2874 flow [2024-06-14 13:04:59,517 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2709, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=218, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2874, PETRI_PLACES=203, PETRI_TRANSITIONS=242} [2024-06-14 13:04:59,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 161 predicate places. [2024-06-14 13:04:59,517 INFO L495 AbstractCegarLoop]: Abstraction has has 203 places, 242 transitions, 2874 flow [2024-06-14 13:04:59,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:04:59,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:04:59,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:04:59,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:04:59,520 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 13:04:59,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:04:59,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1311778308, now seen corresponding path program 2 times [2024-06-14 13:04:59,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:04:59,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349297525] [2024-06-14 13:04:59,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:04:59,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:04:59,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:00,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:00,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:00,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349297525] [2024-06-14 13:05:00,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349297525] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:00,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:00,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:00,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915941828] [2024-06-14 13:05:00,455 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:00,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:00,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:00,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:00,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:00,550 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:00,550 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 203 places, 242 transitions, 2874 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:00,550 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:00,550 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:00,550 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:01,432 INFO L124 PetriNetUnfolderBase]: 2710/4086 cut-off events. [2024-06-14 13:05:01,433 INFO L125 PetriNetUnfolderBase]: For 171165/171165 co-relation queries the response was YES. [2024-06-14 13:05:01,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30890 conditions, 4086 events. 2710/4086 cut-off events. For 171165/171165 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 20544 event pairs, 552 based on Foata normal form. 4/4088 useless extension candidates. Maximal degree in co-relation 30790. Up to 3946 conditions per place. [2024-06-14 13:05:01,474 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 248 selfloop transitions, 28 changer transitions 0/279 dead transitions. [2024-06-14 13:05:01,474 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 279 transitions, 3568 flow [2024-06-14 13:05:01,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:01,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:01,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:05:01,476 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 13:05:01,476 INFO L175 Difference]: Start difference. First operand has 203 places, 242 transitions, 2874 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:05:01,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 279 transitions, 3568 flow [2024-06-14 13:05:01,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 279 transitions, 3466 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:01,682 INFO L231 Difference]: Finished difference. Result has 208 places, 244 transitions, 2882 flow [2024-06-14 13:05:01,683 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2772, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2882, PETRI_PLACES=208, PETRI_TRANSITIONS=244} [2024-06-14 13:05:01,683 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-14 13:05:01,683 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 244 transitions, 2882 flow [2024-06-14 13:05:01,683 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:01,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:01,684 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 13:05:01,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:05:01,684 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 13:05:01,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:01,684 INFO L85 PathProgramCache]: Analyzing trace with hash -423441566, now seen corresponding path program 3 times [2024-06-14 13:05:01,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:01,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805264156] [2024-06-14 13:05:01,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:01,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:01,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:02,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:02,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805264156] [2024-06-14 13:05:02,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805264156] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:02,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:02,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:02,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117280800] [2024-06-14 13:05:02,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:02,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:02,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:02,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:02,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:02,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:02,812 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 244 transitions, 2882 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:02,812 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:02,812 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:02,812 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:03,683 INFO L124 PetriNetUnfolderBase]: 2863/4323 cut-off events. [2024-06-14 13:05:03,683 INFO L125 PetriNetUnfolderBase]: For 184503/184503 co-relation queries the response was YES. [2024-06-14 13:05:03,712 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33004 conditions, 4323 events. 2863/4323 cut-off events. For 184503/184503 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 21931 event pairs, 558 based on Foata normal form. 4/4322 useless extension candidates. Maximal degree in co-relation 32902. Up to 4104 conditions per place. [2024-06-14 13:05:03,728 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 264 selfloop transitions, 39 changer transitions 0/306 dead transitions. [2024-06-14 13:05:03,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 306 transitions, 4145 flow [2024-06-14 13:05:03,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:03,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:03,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 158 transitions. [2024-06-14 13:05:03,730 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3853658536585366 [2024-06-14 13:05:03,730 INFO L175 Difference]: Start difference. First operand has 208 places, 244 transitions, 2882 flow. Second operand 10 states and 158 transitions. [2024-06-14 13:05:03,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 306 transitions, 4145 flow [2024-06-14 13:05:03,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 210 places, 306 transitions, 3973 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:03,969 INFO L231 Difference]: Finished difference. Result has 215 places, 270 transitions, 3342 flow [2024-06-14 13:05:03,970 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2792, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=244, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3342, PETRI_PLACES=215, PETRI_TRANSITIONS=270} [2024-06-14 13:05:03,970 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 173 predicate places. [2024-06-14 13:05:03,970 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 270 transitions, 3342 flow [2024-06-14 13:05:03,970 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:03,970 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:03,970 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 13:05:03,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:05:03,971 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 13:05:03,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:03,971 INFO L85 PathProgramCache]: Analyzing trace with hash -336595934, now seen corresponding path program 1 times [2024-06-14 13:05:03,971 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:03,971 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1567209904] [2024-06-14 13:05:03,971 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:03,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:03,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:04,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:04,841 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:04,841 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1567209904] [2024-06-14 13:05:04,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1567209904] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:04,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:04,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:04,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023443410] [2024-06-14 13:05:04,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:04,842 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:04,844 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:04,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:04,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:04,908 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:04,908 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 270 transitions, 3342 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:04,908 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:04,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:04,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:05,867 INFO L124 PetriNetUnfolderBase]: 2938/4446 cut-off events. [2024-06-14 13:05:05,867 INFO L125 PetriNetUnfolderBase]: For 207427/207443 co-relation queries the response was YES. [2024-06-14 13:05:05,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33869 conditions, 4446 events. 2938/4446 cut-off events. For 207427/207443 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 22787 event pairs, 564 based on Foata normal form. 36/4480 useless extension candidates. Maximal degree in co-relation 33762. Up to 4122 conditions per place. [2024-06-14 13:05:05,914 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 272 selfloop transitions, 39 changer transitions 0/314 dead transitions. [2024-06-14 13:05:05,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 314 transitions, 4133 flow [2024-06-14 13:05:05,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:05:05,916 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 13:05:05,916 INFO L175 Difference]: Start difference. First operand has 215 places, 270 transitions, 3342 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:05:05,916 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 314 transitions, 4133 flow [2024-06-14 13:05:06,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 314 transitions, 4057 flow, removed 37 selfloop flow, removed 1 redundant places. [2024-06-14 13:05:06,167 INFO L231 Difference]: Finished difference. Result has 224 places, 271 transitions, 3379 flow [2024-06-14 13:05:06,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3266, PETRI_DIFFERENCE_MINUEND_PLACES=214, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3379, PETRI_PLACES=224, PETRI_TRANSITIONS=271} [2024-06-14 13:05:06,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 13:05:06,168 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 271 transitions, 3379 flow [2024-06-14 13:05:06,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:06,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:06,168 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 13:05:06,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:05:06,168 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:06,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:06,169 INFO L85 PathProgramCache]: Analyzing trace with hash 544103400, now seen corresponding path program 4 times [2024-06-14 13:05:06,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:06,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803161170] [2024-06-14 13:05:06,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:06,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:07,106 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:07,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:07,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803161170] [2024-06-14 13:05:07,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803161170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:07,107 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:07,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:07,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557084311] [2024-06-14 13:05:07,107 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:07,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:07,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:07,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:07,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:07,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:07,176 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 271 transitions, 3379 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:07,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:07,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:07,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:08,093 INFO L124 PetriNetUnfolderBase]: 2955/4475 cut-off events. [2024-06-14 13:05:08,093 INFO L125 PetriNetUnfolderBase]: For 202529/202529 co-relation queries the response was YES. [2024-06-14 13:05:08,124 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34332 conditions, 4475 events. 2955/4475 cut-off events. For 202529/202529 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 22976 event pairs, 580 based on Foata normal form. 4/4477 useless extension candidates. Maximal degree in co-relation 34222. Up to 4050 conditions per place. [2024-06-14 13:05:08,141 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 235 selfloop transitions, 67 changer transitions 0/305 dead transitions. [2024-06-14 13:05:08,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 232 places, 305 transitions, 4127 flow [2024-06-14 13:05:08,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:08,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:05:08,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:05:08,143 INFO L175 Difference]: Start difference. First operand has 224 places, 271 transitions, 3379 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:05:08,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 232 places, 305 transitions, 4127 flow [2024-06-14 13:05:08,381 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 305 transitions, 4025 flow, removed 10 selfloop flow, removed 9 redundant places. [2024-06-14 13:05:08,385 INFO L231 Difference]: Finished difference. Result has 224 places, 273 transitions, 3474 flow [2024-06-14 13:05:08,385 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3277, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3474, PETRI_PLACES=224, PETRI_TRANSITIONS=273} [2024-06-14 13:05:08,385 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 13:05:08,385 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 273 transitions, 3474 flow [2024-06-14 13:05:08,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:08,386 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:08,386 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 13:05:08,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:05:08,386 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:08,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:08,386 INFO L85 PathProgramCache]: Analyzing trace with hash -1945877422, now seen corresponding path program 2 times [2024-06-14 13:05:08,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:08,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104547031] [2024-06-14 13:05:08,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:08,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:08,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:09,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:09,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:09,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104547031] [2024-06-14 13:05:09,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104547031] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:09,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:09,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:09,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781798206] [2024-06-14 13:05:09,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:09,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:09,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:09,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:09,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:09,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:09,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 273 transitions, 3474 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:09,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:09,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:09,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:10,463 INFO L124 PetriNetUnfolderBase]: 3041/4616 cut-off events. [2024-06-14 13:05:10,463 INFO L125 PetriNetUnfolderBase]: For 227641/227641 co-relation queries the response was YES. [2024-06-14 13:05:10,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35365 conditions, 4616 events. 3041/4616 cut-off events. For 227641/227641 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 23995 event pairs, 590 based on Foata normal form. 20/4634 useless extension candidates. Maximal degree in co-relation 35254. Up to 4067 conditions per place. [2024-06-14 13:05:10,514 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 71 changer transitions 0/318 dead transitions. [2024-06-14 13:05:10,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 318 transitions, 4313 flow [2024-06-14 13:05:10,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:10,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:10,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:05:10,515 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:05:10,515 INFO L175 Difference]: Start difference. First operand has 224 places, 273 transitions, 3474 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:05:10,515 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 318 transitions, 4313 flow [2024-06-14 13:05:10,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 318 transitions, 4128 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:10,813 INFO L231 Difference]: Finished difference. Result has 227 places, 277 transitions, 3516 flow [2024-06-14 13:05:10,813 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3295, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3516, PETRI_PLACES=227, PETRI_TRANSITIONS=277} [2024-06-14 13:05:10,813 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 185 predicate places. [2024-06-14 13:05:10,813 INFO L495 AbstractCegarLoop]: Abstraction has has 227 places, 277 transitions, 3516 flow [2024-06-14 13:05:10,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:10,814 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:10,814 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 13:05:10,814 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:05:10,814 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 13:05:10,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:10,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1051965330, now seen corresponding path program 3 times [2024-06-14 13:05:10,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:10,815 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312329138] [2024-06-14 13:05:10,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:10,815 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:10,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:11,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:11,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:11,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312329138] [2024-06-14 13:05:11,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312329138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:11,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:11,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:11,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137059102] [2024-06-14 13:05:11,519 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:11,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:11,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:11,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:11,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:11,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:11,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 227 places, 277 transitions, 3516 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:11,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:11,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:11,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:12,593 INFO L124 PetriNetUnfolderBase]: 3235/4934 cut-off events. [2024-06-14 13:05:12,593 INFO L125 PetriNetUnfolderBase]: For 260378/260378 co-relation queries the response was YES. [2024-06-14 13:05:12,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38391 conditions, 4934 events. 3235/4934 cut-off events. For 260378/260378 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26243 event pairs, 621 based on Foata normal form. 16/4948 useless extension candidates. Maximal degree in co-relation 38279. Up to 3850 conditions per place. [2024-06-14 13:05:12,644 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 243 selfloop transitions, 75 changer transitions 0/321 dead transitions. [2024-06-14 13:05:12,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 321 transitions, 4558 flow [2024-06-14 13:05:12,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:12,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:12,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:05:12,646 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:05:12,646 INFO L175 Difference]: Start difference. First operand has 227 places, 277 transitions, 3516 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:05:12,646 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 321 transitions, 4558 flow [2024-06-14 13:05:12,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 229 places, 321 transitions, 4427 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:05:12,923 INFO L231 Difference]: Finished difference. Result has 230 places, 279 transitions, 3607 flow [2024-06-14 13:05:12,923 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3385, PETRI_DIFFERENCE_MINUEND_PLACES=221, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=203, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3607, PETRI_PLACES=230, PETRI_TRANSITIONS=279} [2024-06-14 13:05:12,924 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:05:12,924 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 279 transitions, 3607 flow [2024-06-14 13:05:12,924 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:12,924 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:12,924 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 13:05:12,924 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:05:12,924 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 13:05:12,925 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:12,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1940313232, now seen corresponding path program 4 times [2024-06-14 13:05:12,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:12,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890905334] [2024-06-14 13:05:12,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:12,925 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:12,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:13,754 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:13,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:13,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890905334] [2024-06-14 13:05:13,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890905334] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:13,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:13,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:13,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819922821] [2024-06-14 13:05:13,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:13,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:13,756 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:13,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:13,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:13,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:13,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 279 transitions, 3607 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:13,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:13,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:13,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:14,957 INFO L124 PetriNetUnfolderBase]: 3302/5047 cut-off events. [2024-06-14 13:05:14,958 INFO L125 PetriNetUnfolderBase]: For 275930/275930 co-relation queries the response was YES. [2024-06-14 13:05:14,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38962 conditions, 5047 events. 3302/5047 cut-off events. For 275930/275930 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 27162 event pairs, 652 based on Foata normal form. 24/5069 useless extension candidates. Maximal degree in co-relation 38849. Up to 4498 conditions per place. [2024-06-14 13:05:15,015 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 247 selfloop transitions, 77 changer transitions 0/327 dead transitions. [2024-06-14 13:05:15,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 327 transitions, 4467 flow [2024-06-14 13:05:15,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:05:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:05:15,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 183 transitions. [2024-06-14 13:05:15,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4057649667405765 [2024-06-14 13:05:15,017 INFO L175 Difference]: Start difference. First operand has 230 places, 279 transitions, 3607 flow. Second operand 11 states and 183 transitions. [2024-06-14 13:05:15,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 327 transitions, 4467 flow [2024-06-14 13:05:15,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 327 transitions, 4356 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:15,368 INFO L231 Difference]: Finished difference. Result has 236 places, 281 transitions, 3723 flow [2024-06-14 13:05:15,368 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3498, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=3723, PETRI_PLACES=236, PETRI_TRANSITIONS=281} [2024-06-14 13:05:15,368 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 13:05:15,369 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 281 transitions, 3723 flow [2024-06-14 13:05:15,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:15,369 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:15,369 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:15,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:05:15,369 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 13:05:15,369 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:15,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1052174580, now seen corresponding path program 5 times [2024-06-14 13:05:15,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:15,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604803996] [2024-06-14 13:05:15,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:15,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:15,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:16,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:16,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604803996] [2024-06-14 13:05:16,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604803996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:16,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:16,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:16,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [952921542] [2024-06-14 13:05:16,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:16,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:16,291 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:16,291 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:16,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:16,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:16,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 281 transitions, 3723 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:16,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:16,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:16,366 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:17,464 INFO L124 PetriNetUnfolderBase]: 3327/5094 cut-off events. [2024-06-14 13:05:17,464 INFO L125 PetriNetUnfolderBase]: For 274668/274668 co-relation queries the response was YES. [2024-06-14 13:05:17,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39246 conditions, 5094 events. 3327/5094 cut-off events. For 274668/274668 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 27495 event pairs, 655 based on Foata normal form. 20/5112 useless extension candidates. Maximal degree in co-relation 39131. Up to 4313 conditions per place. [2024-06-14 13:05:17,521 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 243 selfloop transitions, 77 changer transitions 0/323 dead transitions. [2024-06-14 13:05:17,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 323 transitions, 4533 flow [2024-06-14 13:05:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:17,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:17,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-14 13:05:17,532 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4097560975609756 [2024-06-14 13:05:17,532 INFO L175 Difference]: Start difference. First operand has 236 places, 281 transitions, 3723 flow. Second operand 10 states and 168 transitions. [2024-06-14 13:05:17,532 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 323 transitions, 4533 flow [2024-06-14 13:05:17,891 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 323 transitions, 4330 flow, removed 25 selfloop flow, removed 9 redundant places. [2024-06-14 13:05:17,896 INFO L231 Difference]: Finished difference. Result has 237 places, 282 transitions, 3728 flow [2024-06-14 13:05:17,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3520, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=281, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3728, PETRI_PLACES=237, PETRI_TRANSITIONS=282} [2024-06-14 13:05:17,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 13:05:17,897 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 282 transitions, 3728 flow [2024-06-14 13:05:17,897 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:17,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:17,898 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 13:05:17,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:05:17,898 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 13:05:17,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:17,898 INFO L85 PathProgramCache]: Analyzing trace with hash -1057690782, now seen corresponding path program 5 times [2024-06-14 13:05:17,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:17,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146289864] [2024-06-14 13:05:17,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:17,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:17,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:18,822 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:18,823 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:18,823 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146289864] [2024-06-14 13:05:18,823 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146289864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:18,823 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:18,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:18,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601917919] [2024-06-14 13:05:18,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:18,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:18,824 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:18,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:18,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:18,971 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:18,971 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 282 transitions, 3728 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:18,971 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:18,972 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:18,972 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:20,020 INFO L124 PetriNetUnfolderBase]: 3344/5121 cut-off events. [2024-06-14 13:05:20,020 INFO L125 PetriNetUnfolderBase]: For 265649/265649 co-relation queries the response was YES. [2024-06-14 13:05:20,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39424 conditions, 5121 events. 3344/5121 cut-off events. For 265649/265649 co-relation queries the response was YES. Maximal size of possible extension queue 248. Compared 27758 event pairs, 669 based on Foata normal form. 4/5123 useless extension candidates. Maximal degree in co-relation 39308. Up to 4513 conditions per place. [2024-06-14 13:05:20,075 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 244 selfloop transitions, 75 changer transitions 0/322 dead transitions. [2024-06-14 13:05:20,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 322 transitions, 4592 flow [2024-06-14 13:05:20,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:20,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:20,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:05:20,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:05:20,077 INFO L175 Difference]: Start difference. First operand has 237 places, 282 transitions, 3728 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:05:20,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 322 transitions, 4592 flow [2024-06-14 13:05:20,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 322 transitions, 4430 flow, removed 11 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:20,449 INFO L231 Difference]: Finished difference. Result has 239 places, 286 transitions, 3850 flow [2024-06-14 13:05:20,449 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3566, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=282, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=208, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3850, PETRI_PLACES=239, PETRI_TRANSITIONS=286} [2024-06-14 13:05:20,450 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 13:05:20,450 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 286 transitions, 3850 flow [2024-06-14 13:05:20,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:20,450 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:20,450 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 13:05:20,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:05:20,450 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 13:05:20,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:20,451 INFO L85 PathProgramCache]: Analyzing trace with hash 759245308, now seen corresponding path program 6 times [2024-06-14 13:05:20,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:20,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740906588] [2024-06-14 13:05:20,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:20,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:20,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:21,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:21,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:21,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740906588] [2024-06-14 13:05:21,334 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740906588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:21,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:21,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:21,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101851204] [2024-06-14 13:05:21,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:21,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:21,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:21,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:21,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:21,421 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:21,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 286 transitions, 3850 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:21,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:21,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:21,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:22,535 INFO L124 PetriNetUnfolderBase]: 3361/5150 cut-off events. [2024-06-14 13:05:22,536 INFO L125 PetriNetUnfolderBase]: For 277357/277359 co-relation queries the response was YES. [2024-06-14 13:05:22,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39948 conditions, 5150 events. 3361/5150 cut-off events. For 277357/277359 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 27858 event pairs, 658 based on Foata normal form. 6/5152 useless extension candidates. Maximal degree in co-relation 39830. Up to 4464 conditions per place. [2024-06-14 13:05:22,593 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 208 selfloop transitions, 108 changer transitions 0/319 dead transitions. [2024-06-14 13:05:22,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 319 transitions, 4640 flow [2024-06-14 13:05:22,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:22,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:22,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:05:22,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 13:05:22,594 INFO L175 Difference]: Start difference. First operand has 239 places, 286 transitions, 3850 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:05:22,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 319 transitions, 4640 flow [2024-06-14 13:05:22,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 319 transitions, 4475 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:23,000 INFO L231 Difference]: Finished difference. Result has 243 places, 288 transitions, 3978 flow [2024-06-14 13:05:23,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3685, PETRI_DIFFERENCE_MINUEND_PLACES=234, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=286, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3978, PETRI_PLACES=243, PETRI_TRANSITIONS=288} [2024-06-14 13:05:23,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 13:05:23,001 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 288 transitions, 3978 flow [2024-06-14 13:05:23,001 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:23,001 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:23,001 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 13:05:23,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:05:23,001 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 13:05:23,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:23,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1310226046, now seen corresponding path program 7 times [2024-06-14 13:05:23,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:23,002 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226000462] [2024-06-14 13:05:23,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:23,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:23,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:23,862 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:23,862 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226000462] [2024-06-14 13:05:23,862 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226000462] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:23,862 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:23,862 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:23,862 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080733688] [2024-06-14 13:05:23,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:23,863 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:23,863 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:23,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:23,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:23,974 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:23,974 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 288 transitions, 3978 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:23,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:23,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:23,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:25,036 INFO L124 PetriNetUnfolderBase]: 3514/5397 cut-off events. [2024-06-14 13:05:25,036 INFO L125 PetriNetUnfolderBase]: For 321978/321980 co-relation queries the response was YES. [2024-06-14 13:05:25,078 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43393 conditions, 5397 events. 3514/5397 cut-off events. For 321978/321980 co-relation queries the response was YES. Maximal size of possible extension queue 267. Compared 29601 event pairs, 705 based on Foata normal form. 6/5399 useless extension candidates. Maximal degree in co-relation 43273. Up to 4460 conditions per place. [2024-06-14 13:05:25,100 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 215 selfloop transitions, 112 changer transitions 0/330 dead transitions. [2024-06-14 13:05:25,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 330 transitions, 5100 flow [2024-06-14 13:05:25,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:25,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:05:25,115 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 13:05:25,115 INFO L175 Difference]: Start difference. First operand has 243 places, 288 transitions, 3978 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:05:25,116 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 330 transitions, 5100 flow [2024-06-14 13:05:25,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 330 transitions, 4825 flow, removed 31 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:25,494 INFO L231 Difference]: Finished difference. Result has 246 places, 293 transitions, 4107 flow [2024-06-14 13:05:25,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3703, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=178, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4107, PETRI_PLACES=246, PETRI_TRANSITIONS=293} [2024-06-14 13:05:25,495 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:05:25,495 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 293 transitions, 4107 flow [2024-06-14 13:05:25,495 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:25,495 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:25,495 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 13:05:25,495 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:05:25,495 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 13:05:25,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:25,496 INFO L85 PathProgramCache]: Analyzing trace with hash 764751838, now seen corresponding path program 8 times [2024-06-14 13:05:25,496 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:25,496 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140779495] [2024-06-14 13:05:25,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:25,496 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:25,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:26,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:26,485 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:26,485 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140779495] [2024-06-14 13:05:26,485 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140779495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:26,485 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:26,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:26,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193298896] [2024-06-14 13:05:26,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:26,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:26,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:26,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:26,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:26,569 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:26,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 293 transitions, 4107 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:26,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:26,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:26,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:27,666 INFO L124 PetriNetUnfolderBase]: 3606/5549 cut-off events. [2024-06-14 13:05:27,666 INFO L125 PetriNetUnfolderBase]: For 364561/364563 co-relation queries the response was YES. [2024-06-14 13:05:27,710 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44842 conditions, 5549 events. 3606/5549 cut-off events. For 364561/364563 co-relation queries the response was YES. Maximal size of possible extension queue 278. Compared 30694 event pairs, 722 based on Foata normal form. 26/5571 useless extension candidates. Maximal degree in co-relation 44720. Up to 4743 conditions per place. [2024-06-14 13:05:27,731 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 103 changer transitions 0/330 dead transitions. [2024-06-14 13:05:27,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 330 transitions, 4957 flow [2024-06-14 13:05:27,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:27,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:27,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:05:27,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 13:05:27,732 INFO L175 Difference]: Start difference. First operand has 246 places, 293 transitions, 4107 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:05:27,732 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 330 transitions, 4957 flow [2024-06-14 13:05:28,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 330 transitions, 4726 flow, removed 53 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:28,258 INFO L231 Difference]: Finished difference. Result has 250 places, 295 transitions, 4171 flow [2024-06-14 13:05:28,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3894, PETRI_DIFFERENCE_MINUEND_PLACES=241, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=293, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4171, PETRI_PLACES=250, PETRI_TRANSITIONS=295} [2024-06-14 13:05:28,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 208 predicate places. [2024-06-14 13:05:28,259 INFO L495 AbstractCegarLoop]: Abstraction has has 250 places, 295 transitions, 4171 flow [2024-06-14 13:05:28,259 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:28,259 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:28,259 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 13:05:28,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:05:28,259 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 13:05:28,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:28,259 INFO L85 PathProgramCache]: Analyzing trace with hash 56649836, now seen corresponding path program 6 times [2024-06-14 13:05:28,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:28,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709392017] [2024-06-14 13:05:28,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:28,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:28,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:29,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:29,137 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:29,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709392017] [2024-06-14 13:05:29,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709392017] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:29,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:29,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:29,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509689846] [2024-06-14 13:05:29,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:29,138 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:29,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:29,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:29,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:29,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:29,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 250 places, 295 transitions, 4171 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:29,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:29,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:29,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:30,380 INFO L124 PetriNetUnfolderBase]: 3725/5750 cut-off events. [2024-06-14 13:05:30,380 INFO L125 PetriNetUnfolderBase]: For 378948/378950 co-relation queries the response was YES. [2024-06-14 13:05:30,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46535 conditions, 5750 events. 3725/5750 cut-off events. For 378948/378950 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 32103 event pairs, 651 based on Foata normal form. 18/5764 useless extension candidates. Maximal degree in co-relation 46411. Up to 3287 conditions per place. [2024-06-14 13:05:30,465 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 203 selfloop transitions, 137 changer transitions 0/343 dead transitions. [2024-06-14 13:05:30,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 343 transitions, 5318 flow [2024-06-14 13:05:30,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:30,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:30,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2024-06-14 13:05:30,467 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.424390243902439 [2024-06-14 13:05:30,467 INFO L175 Difference]: Start difference. First operand has 250 places, 295 transitions, 4171 flow. Second operand 10 states and 174 transitions. [2024-06-14 13:05:30,467 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 343 transitions, 5318 flow [2024-06-14 13:05:30,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 252 places, 343 transitions, 5075 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:31,004 INFO L231 Difference]: Finished difference. Result has 254 places, 298 transitions, 4376 flow [2024-06-14 13:05:31,004 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3928, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=295, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4376, PETRI_PLACES=254, PETRI_TRANSITIONS=298} [2024-06-14 13:05:31,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 212 predicate places. [2024-06-14 13:05:31,004 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 298 transitions, 4376 flow [2024-06-14 13:05:31,005 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:31,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:31,005 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 13:05:31,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:05:31,005 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:31,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:31,005 INFO L85 PathProgramCache]: Analyzing trace with hash 764967040, now seen corresponding path program 7 times [2024-06-14 13:05:31,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:31,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142122791] [2024-06-14 13:05:31,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:31,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:31,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:31,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:31,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:31,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142122791] [2024-06-14 13:05:31,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142122791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:31,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:31,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:31,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826650326] [2024-06-14 13:05:31,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:31,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:31,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:31,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:31,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:31,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:31,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 298 transitions, 4376 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:31,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:31,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:31,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:33,097 INFO L124 PetriNetUnfolderBase]: 3844/5951 cut-off events. [2024-06-14 13:05:33,098 INFO L125 PetriNetUnfolderBase]: For 410907/410909 co-relation queries the response was YES. [2024-06-14 13:05:33,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49064 conditions, 5951 events. 3844/5951 cut-off events. For 410907/410909 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33784 event pairs, 809 based on Foata normal form. 18/5965 useless extension candidates. Maximal degree in co-relation 48938. Up to 4792 conditions per place. [2024-06-14 13:05:33,176 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 232 selfloop transitions, 105 changer transitions 0/340 dead transitions. [2024-06-14 13:05:33,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 340 transitions, 5484 flow [2024-06-14 13:05:33,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:33,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:33,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:05:33,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:05:33,178 INFO L175 Difference]: Start difference. First operand has 254 places, 298 transitions, 4376 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:05:33,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 340 transitions, 5484 flow [2024-06-14 13:05:33,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 340 transitions, 5290 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:33,861 INFO L231 Difference]: Finished difference. Result has 256 places, 300 transitions, 4486 flow [2024-06-14 13:05:33,861 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4190, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=298, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=194, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4486, PETRI_PLACES=256, PETRI_TRANSITIONS=300} [2024-06-14 13:05:33,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 13:05:33,861 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 300 transitions, 4486 flow [2024-06-14 13:05:33,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:33,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:33,862 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 13:05:33,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:05:33,862 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:33,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:33,862 INFO L85 PathProgramCache]: Analyzing trace with hash 958691248, now seen corresponding path program 9 times [2024-06-14 13:05:33,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:33,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622764368] [2024-06-14 13:05:33,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:33,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:33,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:34,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:34,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:34,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622764368] [2024-06-14 13:05:34,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622764368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:34,841 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:34,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:34,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45714387] [2024-06-14 13:05:34,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:34,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:34,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:34,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:34,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:34,939 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:34,939 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 300 transitions, 4486 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:34,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:34,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:34,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:36,049 INFO L124 PetriNetUnfolderBase]: 3800/5883 cut-off events. [2024-06-14 13:05:36,049 INFO L125 PetriNetUnfolderBase]: For 399350/399352 co-relation queries the response was YES. [2024-06-14 13:05:36,096 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47457 conditions, 5883 events. 3800/5883 cut-off events. For 399350/399352 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 33412 event pairs, 770 based on Foata normal form. 26/5905 useless extension candidates. Maximal degree in co-relation 47331. Up to 5077 conditions per place. [2024-06-14 13:05:36,119 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 224 selfloop transitions, 108 changer transitions 0/335 dead transitions. [2024-06-14 13:05:36,119 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 335 transitions, 5270 flow [2024-06-14 13:05:36,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:36,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:36,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:05:36,120 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:05:36,120 INFO L175 Difference]: Start difference. First operand has 256 places, 300 transitions, 4486 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:05:36,120 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 335 transitions, 5270 flow [2024-06-14 13:05:36,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 259 places, 335 transitions, 5063 flow, removed 48 selfloop flow, removed 5 redundant places. [2024-06-14 13:05:36,788 INFO L231 Difference]: Finished difference. Result has 260 places, 300 transitions, 4504 flow [2024-06-14 13:05:36,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4279, PETRI_DIFFERENCE_MINUEND_PLACES=251, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4504, PETRI_PLACES=260, PETRI_TRANSITIONS=300} [2024-06-14 13:05:36,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 218 predicate places. [2024-06-14 13:05:36,789 INFO L495 AbstractCegarLoop]: Abstraction has has 260 places, 300 transitions, 4504 flow [2024-06-14 13:05:36,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:36,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:36,790 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 13:05:36,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:05:36,790 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:36,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:36,790 INFO L85 PathProgramCache]: Analyzing trace with hash -11030222, now seen corresponding path program 8 times [2024-06-14 13:05:36,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:36,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724646860] [2024-06-14 13:05:36,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:36,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:36,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:37,572 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:37,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:37,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724646860] [2024-06-14 13:05:37,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724646860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:37,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:37,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:05:37,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117476708] [2024-06-14 13:05:37,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:37,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:05:37,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:37,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:05:37,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:05:37,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:37,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 260 places, 300 transitions, 4504 flow. Second operand has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:37,674 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:37,674 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:37,674 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:38,810 INFO L124 PetriNetUnfolderBase]: 3808/5903 cut-off events. [2024-06-14 13:05:38,810 INFO L125 PetriNetUnfolderBase]: For 385279/385281 co-relation queries the response was YES. [2024-06-14 13:05:38,859 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47189 conditions, 5903 events. 3808/5903 cut-off events. For 385279/385281 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 33572 event pairs, 762 based on Foata normal form. 18/5917 useless extension candidates. Maximal degree in co-relation 47061. Up to 4744 conditions per place. [2024-06-14 13:05:38,882 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 110 changer transitions 0/341 dead transitions. [2024-06-14 13:05:38,882 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 341 transitions, 5577 flow [2024-06-14 13:05:38,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:05:38,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:05:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:05:38,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 13:05:38,884 INFO L175 Difference]: Start difference. First operand has 260 places, 300 transitions, 4504 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:05:38,884 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 341 transitions, 5577 flow [2024-06-14 13:05:39,521 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 261 places, 341 transitions, 5358 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:05:39,525 INFO L231 Difference]: Finished difference. Result has 262 places, 301 transitions, 4553 flow [2024-06-14 13:05:39,526 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4285, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=300, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4553, PETRI_PLACES=262, PETRI_TRANSITIONS=301} [2024-06-14 13:05:39,526 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 220 predicate places. [2024-06-14 13:05:39,526 INFO L495 AbstractCegarLoop]: Abstraction has has 262 places, 301 transitions, 4553 flow [2024-06-14 13:05:39,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.5) internal successors, (85), 10 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:39,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:39,527 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:05:39,527 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:05:39,527 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:39,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:39,527 INFO L85 PathProgramCache]: Analyzing trace with hash -29093810, now seen corresponding path program 10 times [2024-06-14 13:05:39,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:39,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365429282] [2024-06-14 13:05:39,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:39,528 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:39,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:40,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:40,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365429282] [2024-06-14 13:05:40,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365429282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:40,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:40,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:40,509 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417779976] [2024-06-14 13:05:40,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:40,509 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:40,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:40,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:40,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:40,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:40,563 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 262 places, 301 transitions, 4553 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:40,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:40,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:40,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:41,913 INFO L124 PetriNetUnfolderBase]: 4038/6247 cut-off events. [2024-06-14 13:05:41,913 INFO L125 PetriNetUnfolderBase]: For 386344/386360 co-relation queries the response was YES. [2024-06-14 13:05:41,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50487 conditions, 6247 events. 4038/6247 cut-off events. For 386344/386360 co-relation queries the response was YES. Maximal size of possible extension queue 321. Compared 35842 event pairs, 866 based on Foata normal form. 20/6265 useless extension candidates. Maximal degree in co-relation 50358. Up to 5931 conditions per place. [2024-06-14 13:05:41,998 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 315 selfloop transitions, 67 changer transitions 0/385 dead transitions. [2024-06-14 13:05:41,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 385 transitions, 6369 flow [2024-06-14 13:05:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:41,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:42,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:05:42,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:05:42,007 INFO L175 Difference]: Start difference. First operand has 262 places, 301 transitions, 4553 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:05:42,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 385 transitions, 6369 flow [2024-06-14 13:05:42,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 263 places, 385 transitions, 5900 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-14 13:05:42,844 INFO L231 Difference]: Finished difference. Result has 267 places, 345 transitions, 5249 flow [2024-06-14 13:05:42,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4168, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=301, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=245, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5249, PETRI_PLACES=267, PETRI_TRANSITIONS=345} [2024-06-14 13:05:42,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 13:05:42,845 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 345 transitions, 5249 flow [2024-06-14 13:05:42,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:42,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:42,845 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 13:05:42,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:05:42,845 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:42,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:42,846 INFO L85 PathProgramCache]: Analyzing trace with hash 780820738, now seen corresponding path program 11 times [2024-06-14 13:05:42,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:42,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848630557] [2024-06-14 13:05:42,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:42,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:42,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:43,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:43,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:43,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848630557] [2024-06-14 13:05:43,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848630557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:43,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:43,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:05:43,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245956952] [2024-06-14 13:05:43,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:43,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:05:43,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:43,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:05:43,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:05:43,901 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:43,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 345 transitions, 5249 flow. Second operand has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:43,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:43,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:43,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:45,367 INFO L124 PetriNetUnfolderBase]: 4215/6510 cut-off events. [2024-06-14 13:05:45,367 INFO L125 PetriNetUnfolderBase]: For 395224/395228 co-relation queries the response was YES. [2024-06-14 13:05:45,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52395 conditions, 6510 events. 4215/6510 cut-off events. For 395224/395228 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37456 event pairs, 876 based on Foata normal form. 8/6516 useless extension candidates. Maximal degree in co-relation 52263. Up to 6100 conditions per place. [2024-06-14 13:05:45,439 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 336 selfloop transitions, 97 changer transitions 0/436 dead transitions. [2024-06-14 13:05:45,439 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 436 transitions, 7465 flow [2024-06-14 13:05:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:05:45,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:05:45,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 165 transitions. [2024-06-14 13:05:45,440 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4024390243902439 [2024-06-14 13:05:45,440 INFO L175 Difference]: Start difference. First operand has 267 places, 345 transitions, 5249 flow. Second operand 10 states and 165 transitions. [2024-06-14 13:05:45,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 436 transitions, 7465 flow [2024-06-14 13:05:46,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 272 places, 436 transitions, 7193 flow, removed 109 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:46,247 INFO L231 Difference]: Finished difference. Result has 277 places, 397 transitions, 6538 flow [2024-06-14 13:05:46,248 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5101, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6538, PETRI_PLACES=277, PETRI_TRANSITIONS=397} [2024-06-14 13:05:46,249 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 235 predicate places. [2024-06-14 13:05:46,249 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 397 transitions, 6538 flow [2024-06-14 13:05:46,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.363636363636363) internal successors, (92), 11 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:46,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:46,250 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 13:05:46,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:05:46,250 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:46,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:46,250 INFO L85 PathProgramCache]: Analyzing trace with hash 818418856, now seen corresponding path program 1 times [2024-06-14 13:05:46,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:46,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066267528] [2024-06-14 13:05:46,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:46,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:46,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:46,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:46,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:46,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066267528] [2024-06-14 13:05:46,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066267528] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:46,910 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:46,910 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:46,910 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039212568] [2024-06-14 13:05:46,910 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:46,911 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:46,911 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:46,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:46,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:46,967 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:46,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 397 transitions, 6538 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:46,967 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:46,967 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:46,967 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:48,250 INFO L124 PetriNetUnfolderBase]: 4220/6523 cut-off events. [2024-06-14 13:05:48,251 INFO L125 PetriNetUnfolderBase]: For 405352/405352 co-relation queries the response was YES. [2024-06-14 13:05:48,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53350 conditions, 6523 events. 4220/6523 cut-off events. For 405352/405352 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37632 event pairs, 1076 based on Foata normal form. 1/6522 useless extension candidates. Maximal degree in co-relation 53212. Up to 6460 conditions per place. [2024-06-14 13:05:48,331 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 394 selfloop transitions, 22 changer transitions 0/419 dead transitions. [2024-06-14 13:05:48,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 283 places, 419 transitions, 7700 flow [2024-06-14 13:05:48,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:48,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:48,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:05:48,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 13:05:48,332 INFO L175 Difference]: Start difference. First operand has 277 places, 397 transitions, 6538 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:05:48,333 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 283 places, 419 transitions, 7700 flow [2024-06-14 13:05:49,165 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 419 transitions, 7580 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 13:05:49,170 INFO L231 Difference]: Finished difference. Result has 281 places, 403 transitions, 6638 flow [2024-06-14 13:05:49,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6418, PETRI_DIFFERENCE_MINUEND_PLACES=274, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=397, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=378, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6638, PETRI_PLACES=281, PETRI_TRANSITIONS=403} [2024-06-14 13:05:49,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 13:05:49,171 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 403 transitions, 6638 flow [2024-06-14 13:05:49,171 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:49,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:49,171 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 13:05:49,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:05:49,172 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:49,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:49,173 INFO L85 PathProgramCache]: Analyzing trace with hash -1924145346, now seen corresponding path program 2 times [2024-06-14 13:05:49,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:49,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195858680] [2024-06-14 13:05:49,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:49,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:49,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:49,845 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:49,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:49,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195858680] [2024-06-14 13:05:49,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195858680] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:49,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:49,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:49,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144053672] [2024-06-14 13:05:49,846 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:49,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:49,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:49,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:49,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:49,900 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:49,901 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 403 transitions, 6638 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:49,901 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:49,901 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:49,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:51,235 INFO L124 PetriNetUnfolderBase]: 4230/6537 cut-off events. [2024-06-14 13:05:51,235 INFO L125 PetriNetUnfolderBase]: For 415736/415736 co-relation queries the response was YES. [2024-06-14 13:05:51,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53644 conditions, 6537 events. 4230/6537 cut-off events. For 415736/415736 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37691 event pairs, 1076 based on Foata normal form. 1/6536 useless extension candidates. Maximal degree in co-relation 53505. Up to 6486 conditions per place. [2024-06-14 13:05:51,329 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 398 selfloop transitions, 20 changer transitions 0/421 dead transitions. [2024-06-14 13:05:51,329 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 287 places, 421 transitions, 7636 flow [2024-06-14 13:05:51,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:51,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-14 13:05:51,330 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 13:05:51,330 INFO L175 Difference]: Start difference. First operand has 281 places, 403 transitions, 6638 flow. Second operand 7 states and 105 transitions. [2024-06-14 13:05:51,330 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 287 places, 421 transitions, 7636 flow [2024-06-14 13:05:52,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 421 transitions, 7525 flow, removed 46 selfloop flow, removed 3 redundant places. [2024-06-14 13:05:52,241 INFO L231 Difference]: Finished difference. Result has 285 places, 409 transitions, 6703 flow [2024-06-14 13:05:52,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6538, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=403, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6703, PETRI_PLACES=285, PETRI_TRANSITIONS=409} [2024-06-14 13:05:52,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-14 13:05:52,242 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 409 transitions, 6703 flow [2024-06-14 13:05:52,242 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:52,242 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:52,242 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 13:05:52,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:05:52,242 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:52,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:52,243 INFO L85 PathProgramCache]: Analyzing trace with hash -846854048, now seen corresponding path program 1 times [2024-06-14 13:05:52,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:52,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702612930] [2024-06-14 13:05:52,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:52,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:52,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:52,924 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:52,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702612930] [2024-06-14 13:05:52,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702612930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:52,924 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:52,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:52,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970292005] [2024-06-14 13:05:52,924 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:52,924 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:52,924 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:52,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:52,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:52,985 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:52,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 409 transitions, 6703 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:52,986 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:52,986 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:52,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:54,269 INFO L124 PetriNetUnfolderBase]: 4270/6591 cut-off events. [2024-06-14 13:05:54,270 INFO L125 PetriNetUnfolderBase]: For 431795/431803 co-relation queries the response was YES. [2024-06-14 13:05:54,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54151 conditions, 6591 events. 4270/6591 cut-off events. For 431795/431803 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 38007 event pairs, 987 based on Foata normal form. 12/6599 useless extension candidates. Maximal degree in co-relation 54010. Up to 6402 conditions per place. [2024-06-14 13:05:54,359 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 385 selfloop transitions, 48 changer transitions 0/436 dead transitions. [2024-06-14 13:05:54,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 436 transitions, 7876 flow [2024-06-14 13:05:54,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:05:54,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:05:54,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:05:54,361 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 13:05:54,361 INFO L175 Difference]: Start difference. First operand has 285 places, 409 transitions, 6703 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:05:54,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 436 transitions, 7876 flow [2024-06-14 13:05:55,161 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 436 transitions, 7770 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:05:55,167 INFO L231 Difference]: Finished difference. Result has 289 places, 420 transitions, 6840 flow [2024-06-14 13:05:55,167 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6597, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=409, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6840, PETRI_PLACES=289, PETRI_TRANSITIONS=420} [2024-06-14 13:05:55,167 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 247 predicate places. [2024-06-14 13:05:55,167 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 420 transitions, 6840 flow [2024-06-14 13:05:55,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:55,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:55,168 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 13:05:55,168 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:05:55,168 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:55,168 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:55,168 INFO L85 PathProgramCache]: Analyzing trace with hash 388453792, now seen corresponding path program 2 times [2024-06-14 13:05:55,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:55,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168190323] [2024-06-14 13:05:55,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:55,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:55,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:55,801 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:55,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:55,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168190323] [2024-06-14 13:05:55,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168190323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:55,801 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:55,802 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:55,802 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125548683] [2024-06-14 13:05:55,802 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:55,802 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:55,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:55,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:55,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:55,851 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:55,851 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 420 transitions, 6840 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:55,851 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:55,851 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:55,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:05:57,142 INFO L124 PetriNetUnfolderBase]: 4290/6618 cut-off events. [2024-06-14 13:05:57,142 INFO L125 PetriNetUnfolderBase]: For 443026/443034 co-relation queries the response was YES. [2024-06-14 13:05:57,204 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54676 conditions, 6618 events. 4290/6618 cut-off events. For 443026/443034 co-relation queries the response was YES. Maximal size of possible extension queue 337. Compared 38125 event pairs, 1001 based on Foata normal form. 12/6627 useless extension candidates. Maximal degree in co-relation 54533. Up to 6418 conditions per place. [2024-06-14 13:05:57,233 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 52 changer transitions 0/438 dead transitions. [2024-06-14 13:05:57,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 438 transitions, 7941 flow [2024-06-14 13:05:57,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:05:57,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:05:57,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:05:57,235 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:05:57,235 INFO L175 Difference]: Start difference. First operand has 289 places, 420 transitions, 6840 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:05:57,235 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 438 transitions, 7941 flow [2024-06-14 13:05:58,073 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 438 transitions, 7865 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:05:58,079 INFO L231 Difference]: Finished difference. Result has 292 places, 424 transitions, 6939 flow [2024-06-14 13:05:58,079 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6767, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6939, PETRI_PLACES=292, PETRI_TRANSITIONS=424} [2024-06-14 13:05:58,080 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 13:05:58,081 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 424 transitions, 6939 flow [2024-06-14 13:05:58,081 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:58,081 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:05:58,081 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 13:05:58,081 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:05:58,081 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:05:58,082 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:05:58,082 INFO L85 PathProgramCache]: Analyzing trace with hash 388453606, now seen corresponding path program 3 times [2024-06-14 13:05:58,082 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:05:58,082 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102461863] [2024-06-14 13:05:58,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:05:58,082 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:05:58,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:05:58,755 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:05:58,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:05:58,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102461863] [2024-06-14 13:05:58,755 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102461863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:05:58,755 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:05:58,755 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:05:58,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203551050] [2024-06-14 13:05:58,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:05:58,755 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:05:58,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:05:58,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:05:58,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:05:58,811 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:05:58,811 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 424 transitions, 6939 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:05:58,811 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:05:58,811 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:05:58,811 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:00,116 INFO L124 PetriNetUnfolderBase]: 4287/6617 cut-off events. [2024-06-14 13:06:00,116 INFO L125 PetriNetUnfolderBase]: For 447893/447893 co-relation queries the response was YES. [2024-06-14 13:06:00,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54805 conditions, 6617 events. 4287/6617 cut-off events. For 447893/447893 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 38143 event pairs, 1072 based on Foata normal form. 1/6616 useless extension candidates. Maximal degree in co-relation 54661. Up to 6560 conditions per place. [2024-06-14 13:06:00,208 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 415 selfloop transitions, 20 changer transitions 0/438 dead transitions. [2024-06-14 13:06:00,208 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 438 transitions, 7857 flow [2024-06-14 13:06:00,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:00,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:00,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 98 transitions. [2024-06-14 13:06:00,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 13:06:00,210 INFO L175 Difference]: Start difference. First operand has 292 places, 424 transitions, 6939 flow. Second operand 6 states and 98 transitions. [2024-06-14 13:06:00,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 438 transitions, 7857 flow [2024-06-14 13:06:01,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 294 places, 438 transitions, 7725 flow, removed 39 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:01,265 INFO L231 Difference]: Finished difference. Result has 295 places, 424 transitions, 6857 flow [2024-06-14 13:06:01,265 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6807, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6857, PETRI_PLACES=295, PETRI_TRANSITIONS=424} [2024-06-14 13:06:01,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 253 predicate places. [2024-06-14 13:06:01,266 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 424 transitions, 6857 flow [2024-06-14 13:06:01,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:01,266 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:01,266 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 13:06:01,266 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:06:01,266 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:01,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:01,267 INFO L85 PathProgramCache]: Analyzing trace with hash 2044137652, now seen corresponding path program 3 times [2024-06-14 13:06:01,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:01,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218696518] [2024-06-14 13:06:01,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:01,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:01,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:01,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:01,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:01,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218696518] [2024-06-14 13:06:01,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218696518] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:01,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:01,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:06:01,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583879870] [2024-06-14 13:06:01,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:01,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:06:01,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:01,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:06:01,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:06:01,870 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:01,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 424 transitions, 6857 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:01,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:01,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:01,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:03,358 INFO L124 PetriNetUnfolderBase]: 4264/6581 cut-off events. [2024-06-14 13:06:03,358 INFO L125 PetriNetUnfolderBase]: For 444516/444524 co-relation queries the response was YES. [2024-06-14 13:06:03,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54165 conditions, 6581 events. 4264/6581 cut-off events. For 444516/444524 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 37898 event pairs, 990 based on Foata normal form. 12/6590 useless extension candidates. Maximal degree in co-relation 54020. Up to 6499 conditions per place. [2024-06-14 13:06:03,449 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 24 changer transitions 0/433 dead transitions. [2024-06-14 13:06:03,449 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 433 transitions, 7751 flow [2024-06-14 13:06:03,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:03,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:03,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-14 13:06:03,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3861788617886179 [2024-06-14 13:06:03,450 INFO L175 Difference]: Start difference. First operand has 295 places, 424 transitions, 6857 flow. Second operand 6 states and 95 transitions. [2024-06-14 13:06:03,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 433 transitions, 7751 flow [2024-06-14 13:06:04,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 433 transitions, 7697 flow, removed 5 selfloop flow, removed 5 redundant places. [2024-06-14 13:06:04,392 INFO L231 Difference]: Finished difference. Result has 296 places, 424 transitions, 6858 flow [2024-06-14 13:06:04,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6803, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6858, PETRI_PLACES=296, PETRI_TRANSITIONS=424} [2024-06-14 13:06:04,393 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:06:04,393 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 424 transitions, 6858 flow [2024-06-14 13:06:04,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:04,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:04,394 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 13:06:04,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:06:04,394 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:04,394 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:04,394 INFO L85 PathProgramCache]: Analyzing trace with hash 2044146580, now seen corresponding path program 1 times [2024-06-14 13:06:04,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:04,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825937986] [2024-06-14 13:06:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:04,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:04,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:05,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:05,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:05,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825937986] [2024-06-14 13:06:05,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825937986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:05,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:05,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:05,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264344989] [2024-06-14 13:06:05,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:05,431 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:05,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:05,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:05,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:05,496 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:05,496 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 424 transitions, 6858 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:05,496 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:05,496 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:05,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:06,920 INFO L124 PetriNetUnfolderBase]: 4267/6586 cut-off events. [2024-06-14 13:06:06,920 INFO L125 PetriNetUnfolderBase]: For 453255/453263 co-relation queries the response was YES. [2024-06-14 13:06:06,992 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54319 conditions, 6586 events. 4267/6586 cut-off events. For 453255/453263 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 37859 event pairs, 1016 based on Foata normal form. 12/6595 useless extension candidates. Maximal degree in co-relation 54173. Up to 6493 conditions per place. [2024-06-14 13:06:07,021 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 405 selfloop transitions, 28 changer transitions 0/436 dead transitions. [2024-06-14 13:06:07,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 436 transitions, 7808 flow [2024-06-14 13:06:07,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:07,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:07,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 13:06:07,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:06:07,022 INFO L175 Difference]: Start difference. First operand has 296 places, 424 transitions, 6858 flow. Second operand 6 states and 96 transitions. [2024-06-14 13:06:07,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 436 transitions, 7808 flow [2024-06-14 13:06:08,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 436 transitions, 7678 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:08,021 INFO L231 Difference]: Finished difference. Result has 296 places, 427 transitions, 6854 flow [2024-06-14 13:06:08,021 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6728, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=424, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6854, PETRI_PLACES=296, PETRI_TRANSITIONS=427} [2024-06-14 13:06:08,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:06:08,022 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 427 transitions, 6854 flow [2024-06-14 13:06:08,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:08,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:08,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:08,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:06:08,022 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:08,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:08,023 INFO L85 PathProgramCache]: Analyzing trace with hash 786336871, now seen corresponding path program 1 times [2024-06-14 13:06:08,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:08,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455229321] [2024-06-14 13:06:08,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:08,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:08,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:09,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:09,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:09,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455229321] [2024-06-14 13:06:09,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455229321] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:09,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:09,269 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:06:09,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484457648] [2024-06-14 13:06:09,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:09,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:06:09,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:09,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:06:09,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:06:09,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:09,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 427 transitions, 6854 flow. Second operand has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:09,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:09,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:09,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:10,885 INFO L124 PetriNetUnfolderBase]: 4308/6660 cut-off events. [2024-06-14 13:06:10,886 INFO L125 PetriNetUnfolderBase]: For 481118/481122 co-relation queries the response was YES. [2024-06-14 13:06:10,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55067 conditions, 6660 events. 4308/6660 cut-off events. For 481118/481122 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 38383 event pairs, 853 based on Foata normal form. 16/6674 useless extension candidates. Maximal degree in co-relation 54921. Up to 6350 conditions per place. [2024-06-14 13:06:10,985 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 411 selfloop transitions, 54 changer transitions 0/468 dead transitions. [2024-06-14 13:06:10,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 305 places, 468 transitions, 7962 flow [2024-06-14 13:06:10,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:10,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:10,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:06:10,987 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:06:10,987 INFO L175 Difference]: Start difference. First operand has 296 places, 427 transitions, 6854 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:06:10,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 305 places, 468 transitions, 7962 flow [2024-06-14 13:06:11,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 468 transitions, 7858 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:11,919 INFO L231 Difference]: Finished difference. Result has 302 places, 428 transitions, 6912 flow [2024-06-14 13:06:11,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6750, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=427, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6912, PETRI_PLACES=302, PETRI_TRANSITIONS=428} [2024-06-14 13:06:11,920 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 13:06:11,920 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 428 transitions, 6912 flow [2024-06-14 13:06:11,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.333333333333334) internal successors, (100), 12 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:11,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:11,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:11,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:06:11,921 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:11,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:11,921 INFO L85 PathProgramCache]: Analyzing trace with hash 97252789, now seen corresponding path program 2 times [2024-06-14 13:06:11,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:11,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074087442] [2024-06-14 13:06:11,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:11,921 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:11,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:13,025 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 13:06:13,025 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:13,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074087442] [2024-06-14 13:06:13,025 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074087442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:13,025 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:13,025 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:13,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372711753] [2024-06-14 13:06:13,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:13,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:13,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:13,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:13,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:13,084 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:13,084 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 428 transitions, 6912 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:13,084 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:13,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:13,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:14,576 INFO L124 PetriNetUnfolderBase]: 4349/6727 cut-off events. [2024-06-14 13:06:14,576 INFO L125 PetriNetUnfolderBase]: For 495546/495546 co-relation queries the response was YES. [2024-06-14 13:06:14,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55764 conditions, 6727 events. 4349/6727 cut-off events. For 495546/495546 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38950 event pairs, 855 based on Foata normal form. 12/6737 useless extension candidates. Maximal degree in co-relation 55617. Up to 5708 conditions per place. [2024-06-14 13:06:14,672 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 302 selfloop transitions, 159 changer transitions 0/464 dead transitions. [2024-06-14 13:06:14,672 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 310 places, 464 transitions, 8013 flow [2024-06-14 13:06:14,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:14,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:14,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:06:14,673 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 13:06:14,673 INFO L175 Difference]: Start difference. First operand has 302 places, 428 transitions, 6912 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:06:14,674 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 310 places, 464 transitions, 8013 flow [2024-06-14 13:06:15,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 464 transitions, 7867 flow, removed 20 selfloop flow, removed 8 redundant places. [2024-06-14 13:06:15,766 INFO L231 Difference]: Finished difference. Result has 304 places, 430 transitions, 7220 flow [2024-06-14 13:06:15,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6766, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=428, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7220, PETRI_PLACES=304, PETRI_TRANSITIONS=430} [2024-06-14 13:06:15,767 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 13:06:15,767 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 430 transitions, 7220 flow [2024-06-14 13:06:15,767 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:15,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:15,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:15,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:06:15,767 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:15,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash -427358589, now seen corresponding path program 3 times [2024-06-14 13:06:15,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:15,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22259421] [2024-06-14 13:06:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:15,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:16,878 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 13:06:16,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:16,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22259421] [2024-06-14 13:06:16,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22259421] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:16,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:16,879 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:06:16,879 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124033696] [2024-06-14 13:06:16,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:16,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:06:16,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:16,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:06:16,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:06:16,988 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:16,988 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 430 transitions, 7220 flow. Second operand has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:16,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:16,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:16,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:18,473 INFO L124 PetriNetUnfolderBase]: 4329/6695 cut-off events. [2024-06-14 13:06:18,473 INFO L125 PetriNetUnfolderBase]: For 490491/490491 co-relation queries the response was YES. [2024-06-14 13:06:18,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55572 conditions, 6695 events. 4329/6695 cut-off events. For 490491/490491 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38791 event pairs, 850 based on Foata normal form. 12/6705 useless extension candidates. Maximal degree in co-relation 55423. Up to 5923 conditions per place. [2024-06-14 13:06:18,570 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 326 selfloop transitions, 135 changer transitions 0/464 dead transitions. [2024-06-14 13:06:18,571 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 464 transitions, 8262 flow [2024-06-14 13:06:18,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:18,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:18,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:06:18,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 13:06:18,572 INFO L175 Difference]: Start difference. First operand has 304 places, 430 transitions, 7220 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:06:18,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 464 transitions, 8262 flow [2024-06-14 13:06:19,700 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 464 transitions, 7943 flow, removed 33 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:19,706 INFO L231 Difference]: Finished difference. Result has 307 places, 430 transitions, 7184 flow [2024-06-14 13:06:19,707 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6901, PETRI_DIFFERENCE_MINUEND_PLACES=298, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7184, PETRI_PLACES=307, PETRI_TRANSITIONS=430} [2024-06-14 13:06:19,707 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 265 predicate places. [2024-06-14 13:06:19,707 INFO L495 AbstractCegarLoop]: Abstraction has has 307 places, 430 transitions, 7184 flow [2024-06-14 13:06:19,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.6) internal successors, (86), 10 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:19,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:19,708 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:19,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:06:19,708 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:19,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:19,708 INFO L85 PathProgramCache]: Analyzing trace with hash -730052620, now seen corresponding path program 1 times [2024-06-14 13:06:19,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:19,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689659113] [2024-06-14 13:06:19,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:19,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:19,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:20,352 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 13:06:20,353 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:20,353 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689659113] [2024-06-14 13:06:20,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689659113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:20,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:20,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:20,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268490030] [2024-06-14 13:06:20,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:20,353 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:20,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:20,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:20,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:20,407 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:20,408 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 307 places, 430 transitions, 7184 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:20,408 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:20,408 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:20,408 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:21,828 INFO L124 PetriNetUnfolderBase]: 4359/6742 cut-off events. [2024-06-14 13:06:21,829 INFO L125 PetriNetUnfolderBase]: For 488742/488750 co-relation queries the response was YES. [2024-06-14 13:06:21,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55749 conditions, 6742 events. 4359/6742 cut-off events. For 488742/488750 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 39178 event pairs, 998 based on Foata normal form. 12/6751 useless extension candidates. Maximal degree in co-relation 55599. Up to 6468 conditions per place. [2024-06-14 13:06:21,927 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 387 selfloop transitions, 68 changer transitions 0/458 dead transitions. [2024-06-14 13:06:21,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 458 transitions, 8394 flow [2024-06-14 13:06:21,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:06:21,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:06:21,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:06:21,928 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 13:06:21,928 INFO L175 Difference]: Start difference. First operand has 307 places, 430 transitions, 7184 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:06:21,928 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 458 transitions, 8394 flow [2024-06-14 13:06:23,033 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 306 places, 458 transitions, 8105 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:23,039 INFO L231 Difference]: Finished difference. Result has 308 places, 438 transitions, 7142 flow [2024-06-14 13:06:23,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6895, PETRI_DIFFERENCE_MINUEND_PLACES=300, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7142, PETRI_PLACES=308, PETRI_TRANSITIONS=438} [2024-06-14 13:06:23,041 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 266 predicate places. [2024-06-14 13:06:23,041 INFO L495 AbstractCegarLoop]: Abstraction has has 308 places, 438 transitions, 7142 flow [2024-06-14 13:06:23,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:23,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:23,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:06:23,042 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:23,042 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:23,042 INFO L85 PathProgramCache]: Analyzing trace with hash 1383597388, now seen corresponding path program 2 times [2024-06-14 13:06:23,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:23,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319438313] [2024-06-14 13:06:23,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:23,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:23,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:23,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:23,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:23,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319438313] [2024-06-14 13:06:23,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319438313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:23,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:23,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:23,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279287717] [2024-06-14 13:06:23,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:23,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:23,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:23,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:23,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:23,746 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:23,747 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 308 places, 438 transitions, 7142 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:23,747 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:23,747 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:23,747 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:25,209 INFO L124 PetriNetUnfolderBase]: 4379/6768 cut-off events. [2024-06-14 13:06:25,209 INFO L125 PetriNetUnfolderBase]: For 496541/496543 co-relation queries the response was YES. [2024-06-14 13:06:25,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55621 conditions, 6768 events. 4379/6768 cut-off events. For 496541/496543 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 39217 event pairs, 945 based on Foata normal form. 6/6769 useless extension candidates. Maximal degree in co-relation 55469. Up to 6484 conditions per place. [2024-06-14 13:06:25,303 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 394 selfloop transitions, 59 changer transitions 0/456 dead transitions. [2024-06-14 13:06:25,303 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 456 transitions, 8287 flow [2024-06-14 13:06:25,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:25,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:25,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 102 transitions. [2024-06-14 13:06:25,304 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:06:25,305 INFO L175 Difference]: Start difference. First operand has 308 places, 438 transitions, 7142 flow. Second operand 6 states and 102 transitions. [2024-06-14 13:06:25,305 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 456 transitions, 8287 flow [2024-06-14 13:06:26,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 310 places, 456 transitions, 8199 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:26,570 INFO L231 Difference]: Finished difference. Result has 311 places, 441 transitions, 7210 flow [2024-06-14 13:06:26,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7061, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=438, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=382, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7210, PETRI_PLACES=311, PETRI_TRANSITIONS=441} [2024-06-14 13:06:26,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 269 predicate places. [2024-06-14 13:06:26,570 INFO L495 AbstractCegarLoop]: Abstraction has has 311 places, 441 transitions, 7210 flow [2024-06-14 13:06:26,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:26,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:26,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:26,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:06:26,571 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:26,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:26,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1383586228, now seen corresponding path program 3 times [2024-06-14 13:06:26,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:26,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [576326956] [2024-06-14 13:06:26,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:26,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:26,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:27,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:27,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:27,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [576326956] [2024-06-14 13:06:27,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [576326956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:27,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:27,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:27,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53737628] [2024-06-14 13:06:27,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:27,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:27,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:27,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:27,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:27,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:27,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 311 places, 441 transitions, 7210 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:27,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:27,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:27,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:28,833 INFO L124 PetriNetUnfolderBase]: 4367/6754 cut-off events. [2024-06-14 13:06:28,833 INFO L125 PetriNetUnfolderBase]: For 501193/501201 co-relation queries the response was YES. [2024-06-14 13:06:28,900 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55433 conditions, 6754 events. 4367/6754 cut-off events. For 501193/501201 co-relation queries the response was YES. Maximal size of possible extension queue 347. Compared 39237 event pairs, 984 based on Foata normal form. 12/6763 useless extension candidates. Maximal degree in co-relation 55280. Up to 6476 conditions per place. [2024-06-14 13:06:28,929 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 394 selfloop transitions, 61 changer transitions 0/458 dead transitions. [2024-06-14 13:06:28,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 458 transitions, 8194 flow [2024-06-14 13:06:28,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:06:28,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:06:28,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:06:28,930 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 13:06:28,930 INFO L175 Difference]: Start difference. First operand has 311 places, 441 transitions, 7210 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:06:28,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 458 transitions, 8194 flow [2024-06-14 13:06:30,278 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 458 transitions, 8071 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:30,284 INFO L231 Difference]: Finished difference. Result has 313 places, 441 transitions, 7221 flow [2024-06-14 13:06:30,285 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7087, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7221, PETRI_PLACES=313, PETRI_TRANSITIONS=441} [2024-06-14 13:06:30,285 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 13:06:30,285 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 441 transitions, 7221 flow [2024-06-14 13:06:30,285 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:30,285 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:30,285 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:30,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:06:30,286 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:30,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:30,286 INFO L85 PathProgramCache]: Analyzing trace with hash 2102794285, now seen corresponding path program 4 times [2024-06-14 13:06:30,286 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:30,286 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151249108] [2024-06-14 13:06:30,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:30,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:30,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:31,342 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:31,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:31,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151249108] [2024-06-14 13:06:31,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151249108] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:31,343 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:31,343 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:31,343 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71593416] [2024-06-14 13:06:31,343 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:31,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:31,344 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:31,480 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:31,481 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 441 transitions, 7221 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:31,481 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:31,481 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:31,481 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:32,956 INFO L124 PetriNetUnfolderBase]: 4347/6720 cut-off events. [2024-06-14 13:06:32,956 INFO L125 PetriNetUnfolderBase]: For 500923/500925 co-relation queries the response was YES. [2024-06-14 13:06:33,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54707 conditions, 6720 events. 4347/6720 cut-off events. For 500923/500925 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 38957 event pairs, 788 based on Foata normal form. 14/6729 useless extension candidates. Maximal degree in co-relation 54554. Up to 6007 conditions per place. [2024-06-14 13:06:33,053 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 330 selfloop transitions, 142 changer transitions 0/475 dead transitions. [2024-06-14 13:06:33,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 475 transitions, 8299 flow [2024-06-14 13:06:33,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:33,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:33,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:06:33,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:06:33,054 INFO L175 Difference]: Start difference. First operand has 313 places, 441 transitions, 7221 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:06:33,055 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 475 transitions, 8299 flow [2024-06-14 13:06:34,313 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 475 transitions, 8145 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:34,319 INFO L231 Difference]: Finished difference. Result has 317 places, 442 transitions, 7376 flow [2024-06-14 13:06:34,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7067, PETRI_DIFFERENCE_MINUEND_PLACES=307, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=299, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7376, PETRI_PLACES=317, PETRI_TRANSITIONS=442} [2024-06-14 13:06:34,320 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-14 13:06:34,320 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 442 transitions, 7376 flow [2024-06-14 13:06:34,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:34,320 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:34,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:34,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:06:34,321 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:34,321 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:34,321 INFO L85 PathProgramCache]: Analyzing trace with hash -2062495079, now seen corresponding path program 5 times [2024-06-14 13:06:34,321 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:34,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138771034] [2024-06-14 13:06:34,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:34,322 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:34,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:35,439 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:35,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:35,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138771034] [2024-06-14 13:06:35,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138771034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:35,440 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:35,440 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:35,440 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361288014] [2024-06-14 13:06:35,440 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:35,440 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:35,440 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:35,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:35,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:35,527 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:35,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 442 transitions, 7376 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:35,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:35,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:35,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:37,026 INFO L124 PetriNetUnfolderBase]: 4327/6688 cut-off events. [2024-06-14 13:06:37,027 INFO L125 PetriNetUnfolderBase]: For 479114/479116 co-relation queries the response was YES. [2024-06-14 13:06:37,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54128 conditions, 6688 events. 4327/6688 cut-off events. For 479114/479116 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 38694 event pairs, 827 based on Foata normal form. 14/6697 useless extension candidates. Maximal degree in co-relation 53974. Up to 5947 conditions per place. [2024-06-14 13:06:37,131 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 333 selfloop transitions, 140 changer transitions 0/476 dead transitions. [2024-06-14 13:06:37,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 476 transitions, 8456 flow [2024-06-14 13:06:37,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:37,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:37,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:06:37,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:06:37,133 INFO L175 Difference]: Start difference. First operand has 317 places, 442 transitions, 7376 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:06:37,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 476 transitions, 8456 flow [2024-06-14 13:06:38,457 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 476 transitions, 8132 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:38,464 INFO L231 Difference]: Finished difference. Result has 320 places, 443 transitions, 7361 flow [2024-06-14 13:06:38,464 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7052, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=302, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7361, PETRI_PLACES=320, PETRI_TRANSITIONS=443} [2024-06-14 13:06:38,464 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 278 predicate places. [2024-06-14 13:06:38,464 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 443 transitions, 7361 flow [2024-06-14 13:06:38,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:38,465 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:38,465 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:38,465 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:06:38,465 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:38,465 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:38,465 INFO L85 PathProgramCache]: Analyzing trace with hash 2061654467, now seen corresponding path program 6 times [2024-06-14 13:06:38,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:38,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926624140] [2024-06-14 13:06:38,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:38,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:38,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:39,525 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:39,525 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:39,525 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926624140] [2024-06-14 13:06:39,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926624140] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:39,525 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:39,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:06:39,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854188175] [2024-06-14 13:06:39,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:39,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:06:39,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:39,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:06:39,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:06:39,613 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:39,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 443 transitions, 7361 flow. Second operand has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:39,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:39,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:39,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:41,096 INFO L124 PetriNetUnfolderBase]: 4307/6656 cut-off events. [2024-06-14 13:06:41,096 INFO L125 PetriNetUnfolderBase]: For 464593/464595 co-relation queries the response was YES. [2024-06-14 13:06:41,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53092 conditions, 6656 events. 4307/6656 cut-off events. For 464593/464595 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38435 event pairs, 801 based on Foata normal form. 14/6665 useless extension candidates. Maximal degree in co-relation 52936. Up to 5866 conditions per place. [2024-06-14 13:06:41,193 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 328 selfloop transitions, 144 changer transitions 0/475 dead transitions. [2024-06-14 13:06:41,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 475 transitions, 8297 flow [2024-06-14 13:06:41,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:06:41,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:06:41,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:06:41,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 13:06:41,201 INFO L175 Difference]: Start difference. First operand has 320 places, 443 transitions, 7361 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:06:41,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 475 transitions, 8297 flow [2024-06-14 13:06:42,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 475 transitions, 7998 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:06:42,496 INFO L231 Difference]: Finished difference. Result has 321 places, 442 transitions, 7230 flow [2024-06-14 13:06:42,496 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6938, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=144, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=298, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7230, PETRI_PLACES=321, PETRI_TRANSITIONS=442} [2024-06-14 13:06:42,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 13:06:42,497 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 442 transitions, 7230 flow [2024-06-14 13:06:42,497 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.454545454545455) internal successors, (93), 11 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:42,497 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:42,497 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:42,497 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:06:42,497 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:42,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:42,498 INFO L85 PathProgramCache]: Analyzing trace with hash 477227837, now seen corresponding path program 1 times [2024-06-14 13:06:42,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:42,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226500964] [2024-06-14 13:06:42,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:42,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:42,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:43,617 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:43,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:43,618 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226500964] [2024-06-14 13:06:43,618 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226500964] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:43,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:43,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:43,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180753172] [2024-06-14 13:06:43,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:43,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:43,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:43,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:43,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:43,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:43,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 442 transitions, 7230 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:43,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:43,716 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:43,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:45,058 INFO L124 PetriNetUnfolderBase]: 4312/6664 cut-off events. [2024-06-14 13:06:45,058 INFO L125 PetriNetUnfolderBase]: For 453349/453349 co-relation queries the response was YES. [2024-06-14 13:06:45,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53275 conditions, 6664 events. 4312/6664 cut-off events. For 453349/453349 co-relation queries the response was YES. Maximal size of possible extension queue 344. Compared 38573 event pairs, 1057 based on Foata normal form. 1/6663 useless extension candidates. Maximal degree in co-relation 53118. Up to 6578 conditions per place. [2024-06-14 13:06:45,157 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 429 selfloop transitions, 36 changer transitions 0/468 dead transitions. [2024-06-14 13:06:45,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 468 transitions, 8484 flow [2024-06-14 13:06:45,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:45,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:45,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:06:45,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 13:06:45,159 INFO L175 Difference]: Start difference. First operand has 321 places, 442 transitions, 7230 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:06:45,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 468 transitions, 8484 flow [2024-06-14 13:06:46,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 468 transitions, 7933 flow, removed 27 selfloop flow, removed 10 redundant places. [2024-06-14 13:06:46,569 INFO L231 Difference]: Finished difference. Result has 319 places, 448 transitions, 6879 flow [2024-06-14 13:06:46,569 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6679, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=442, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6879, PETRI_PLACES=319, PETRI_TRANSITIONS=448} [2024-06-14 13:06:46,570 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 13:06:46,570 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 448 transitions, 6879 flow [2024-06-14 13:06:46,570 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:46,570 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:46,570 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:46,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:06:46,570 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:46,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:46,571 INFO L85 PathProgramCache]: Analyzing trace with hash 477318202, now seen corresponding path program 1 times [2024-06-14 13:06:46,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:46,571 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156747197] [2024-06-14 13:06:46,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:46,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:46,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:47,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:47,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:47,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156747197] [2024-06-14 13:06:47,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156747197] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:47,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:47,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:47,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991961743] [2024-06-14 13:06:47,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:47,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:47,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:47,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:47,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:47,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:47,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 448 transitions, 6879 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:47,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:47,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:47,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:48,825 INFO L124 PetriNetUnfolderBase]: 4376/6750 cut-off events. [2024-06-14 13:06:48,825 INFO L125 PetriNetUnfolderBase]: For 483727/483735 co-relation queries the response was YES. [2024-06-14 13:06:48,879 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53690 conditions, 6750 events. 4376/6750 cut-off events. For 483727/483735 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39042 event pairs, 963 based on Foata normal form. 12/6759 useless extension candidates. Maximal degree in co-relation 53535. Up to 6402 conditions per place. [2024-06-14 13:06:48,903 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 410 selfloop transitions, 70 changer transitions 0/483 dead transitions. [2024-06-14 13:06:48,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 483 transitions, 8593 flow [2024-06-14 13:06:48,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:06:48,904 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 13:06:48,904 INFO L175 Difference]: Start difference. First operand has 319 places, 448 transitions, 6879 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:06:48,905 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 483 transitions, 8593 flow [2024-06-14 13:06:50,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 483 transitions, 8492 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-14 13:06:50,035 INFO L231 Difference]: Finished difference. Result has 324 places, 459 transitions, 7265 flow [2024-06-14 13:06:50,036 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6782, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=448, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=384, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7265, PETRI_PLACES=324, PETRI_TRANSITIONS=459} [2024-06-14 13:06:50,036 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 13:06:50,036 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 459 transitions, 7265 flow [2024-06-14 13:06:50,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:50,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:50,037 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:06:50,037 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:50,037 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:50,037 INFO L85 PathProgramCache]: Analyzing trace with hash -486395849, now seen corresponding path program 2 times [2024-06-14 13:06:50,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:50,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539383072] [2024-06-14 13:06:50,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:50,038 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:50,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:50,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539383072] [2024-06-14 13:06:50,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539383072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:50,856 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:50,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:50,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826208312] [2024-06-14 13:06:50,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:50,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:50,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:50,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:50,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:50,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:50,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 459 transitions, 7265 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:50,911 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:50,911 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:50,911 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:52,409 INFO L124 PetriNetUnfolderBase]: 4381/6760 cut-off events. [2024-06-14 13:06:52,409 INFO L125 PetriNetUnfolderBase]: For 481178/481178 co-relation queries the response was YES. [2024-06-14 13:06:52,476 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54426 conditions, 6760 events. 4381/6760 cut-off events. For 481178/481178 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 39100 event pairs, 1064 based on Foata normal form. 1/6759 useless extension candidates. Maximal degree in co-relation 54268. Up to 6691 conditions per place. [2024-06-14 13:06:52,502 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 444 selfloop transitions, 31 changer transitions 0/478 dead transitions. [2024-06-14 13:06:52,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 478 transitions, 8321 flow [2024-06-14 13:06:52,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:06:52,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:06:52,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:06:52,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-14 13:06:52,503 INFO L175 Difference]: Start difference. First operand has 324 places, 459 transitions, 7265 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:06:52,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 478 transitions, 8321 flow [2024-06-14 13:06:53,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 328 places, 478 transitions, 8109 flow, removed 80 selfloop flow, removed 3 redundant places. [2024-06-14 13:06:53,903 INFO L231 Difference]: Finished difference. Result has 329 places, 462 transitions, 7181 flow [2024-06-14 13:06:53,903 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7053, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7181, PETRI_PLACES=329, PETRI_TRANSITIONS=462} [2024-06-14 13:06:53,903 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 287 predicate places. [2024-06-14 13:06:53,904 INFO L495 AbstractCegarLoop]: Abstraction has has 329 places, 462 transitions, 7181 flow [2024-06-14 13:06:53,904 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:53,904 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:53,904 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:53,904 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:06:53,904 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:53,904 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:53,904 INFO L85 PathProgramCache]: Analyzing trace with hash 481042852, now seen corresponding path program 2 times [2024-06-14 13:06:53,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:53,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074216823] [2024-06-14 13:06:53,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:53,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:53,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:54,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:54,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074216823] [2024-06-14 13:06:54,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074216823] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:54,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:54,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:54,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34331215] [2024-06-14 13:06:54,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:54,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:54,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:54,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:54,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:54,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:54,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 329 places, 462 transitions, 7181 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:54,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:54,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:54,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:06:56,229 INFO L124 PetriNetUnfolderBase]: 4457/6862 cut-off events. [2024-06-14 13:06:56,229 INFO L125 PetriNetUnfolderBase]: For 516181/516189 co-relation queries the response was YES. [2024-06-14 13:06:56,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55666 conditions, 6862 events. 4457/6862 cut-off events. For 516181/516189 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39702 event pairs, 967 based on Foata normal form. 12/6871 useless extension candidates. Maximal degree in co-relation 55506. Up to 6604 conditions per place. [2024-06-14 13:06:56,323 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 429 selfloop transitions, 65 changer transitions 0/497 dead transitions. [2024-06-14 13:06:56,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 338 places, 497 transitions, 8869 flow [2024-06-14 13:06:56,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:06:56,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:06:56,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:06:56,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-14 13:06:56,325 INFO L175 Difference]: Start difference. First operand has 329 places, 462 transitions, 7181 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:06:56,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 338 places, 497 transitions, 8869 flow [2024-06-14 13:06:57,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 497 transitions, 8769 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:06:57,749 INFO L231 Difference]: Finished difference. Result has 334 places, 474 transitions, 7539 flow [2024-06-14 13:06:57,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7081, PETRI_DIFFERENCE_MINUEND_PLACES=323, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=462, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7539, PETRI_PLACES=334, PETRI_TRANSITIONS=474} [2024-06-14 13:06:57,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 292 predicate places. [2024-06-14 13:06:57,750 INFO L495 AbstractCegarLoop]: Abstraction has has 334 places, 474 transitions, 7539 flow [2024-06-14 13:06:57,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:57,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:06:57,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:06:57,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:06:57,751 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:06:57,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:06:57,751 INFO L85 PathProgramCache]: Analyzing trace with hash 481037117, now seen corresponding path program 3 times [2024-06-14 13:06:57,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:06:57,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818262690] [2024-06-14 13:06:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:06:57,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:06:57,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:06:58,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:06:58,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:06:58,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818262690] [2024-06-14 13:06:58,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818262690] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:06:58,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:06:58,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:06:58,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9528732] [2024-06-14 13:06:58,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:06:58,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:06:58,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:06:58,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:06:58,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:06:58,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:06:58,886 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 334 places, 474 transitions, 7539 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:06:58,886 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:06:58,886 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:06:58,886 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:00,598 INFO L124 PetriNetUnfolderBase]: 4462/6872 cut-off events. [2024-06-14 13:07:00,598 INFO L125 PetriNetUnfolderBase]: For 523221/523221 co-relation queries the response was YES. [2024-06-14 13:07:00,667 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56272 conditions, 6872 events. 4462/6872 cut-off events. For 523221/523221 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 39835 event pairs, 1076 based on Foata normal form. 1/6871 useless extension candidates. Maximal degree in co-relation 56110. Up to 6818 conditions per place. [2024-06-14 13:07:00,694 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 464 selfloop transitions, 23 changer transitions 0/490 dead transitions. [2024-06-14 13:07:00,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 341 places, 490 transitions, 8613 flow [2024-06-14 13:07:00,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:00,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:00,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 115 transitions. [2024-06-14 13:07:00,695 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35060975609756095 [2024-06-14 13:07:00,695 INFO L175 Difference]: Start difference. First operand has 334 places, 474 transitions, 7539 flow. Second operand 8 states and 115 transitions. [2024-06-14 13:07:00,695 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 341 places, 490 transitions, 8613 flow [2024-06-14 13:07:02,126 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 490 transitions, 8423 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:02,133 INFO L231 Difference]: Finished difference. Result has 337 places, 477 transitions, 7467 flow [2024-06-14 13:07:02,133 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7349, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=474, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=451, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7467, PETRI_PLACES=337, PETRI_TRANSITIONS=477} [2024-06-14 13:07:02,133 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:07:02,134 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 477 transitions, 7467 flow [2024-06-14 13:07:02,134 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:02,134 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:02,134 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:02,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:07:02,134 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:02,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:02,134 INFO L85 PathProgramCache]: Analyzing trace with hash 481037272, now seen corresponding path program 3 times [2024-06-14 13:07:02,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:02,135 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49959315] [2024-06-14 13:07:02,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:02,135 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:02,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:02,799 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:02,799 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:02,799 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49959315] [2024-06-14 13:07:02,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49959315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:02,800 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:02,800 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:02,800 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907099474] [2024-06-14 13:07:02,800 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:02,800 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:02,800 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:02,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:02,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:02,855 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:02,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 477 transitions, 7467 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:02,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:02,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:02,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:04,364 INFO L124 PetriNetUnfolderBase]: 4454/6859 cut-off events. [2024-06-14 13:07:04,365 INFO L125 PetriNetUnfolderBase]: For 528982/528990 co-relation queries the response was YES. [2024-06-14 13:07:04,433 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55705 conditions, 6859 events. 4454/6859 cut-off events. For 528982/528990 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 39680 event pairs, 967 based on Foata normal form. 12/6868 useless extension candidates. Maximal degree in co-relation 55541. Up to 6608 conditions per place. [2024-06-14 13:07:04,460 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 432 selfloop transitions, 60 changer transitions 0/495 dead transitions. [2024-06-14 13:07:04,460 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 495 transitions, 8683 flow [2024-06-14 13:07:04,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:04,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:04,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:07:04,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 13:07:04,461 INFO L175 Difference]: Start difference. First operand has 337 places, 477 transitions, 7467 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:07:04,461 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 495 transitions, 8683 flow [2024-06-14 13:07:05,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 495 transitions, 8535 flow, removed 53 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:05,967 INFO L231 Difference]: Finished difference. Result has 339 places, 477 transitions, 7447 flow [2024-06-14 13:07:05,967 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7319, PETRI_DIFFERENCE_MINUEND_PLACES=331, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=417, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7447, PETRI_PLACES=339, PETRI_TRANSITIONS=477} [2024-06-14 13:07:05,967 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 297 predicate places. [2024-06-14 13:07:05,967 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 477 transitions, 7447 flow [2024-06-14 13:07:05,968 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:05,968 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:05,968 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:05,968 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:07:05,968 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:05,968 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:05,968 INFO L85 PathProgramCache]: Analyzing trace with hash -1063593210, now seen corresponding path program 4 times [2024-06-14 13:07:05,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:05,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283046556] [2024-06-14 13:07:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:05,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:05,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:06,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:06,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:06,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283046556] [2024-06-14 13:07:06,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283046556] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:06,729 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:06,729 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:06,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920953919] [2024-06-14 13:07:06,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:06,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:06,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:06,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:06,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:06,801 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:06,801 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 477 transitions, 7447 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:06,801 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:06,801 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:06,801 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:08,435 INFO L124 PetriNetUnfolderBase]: 4506/6931 cut-off events. [2024-06-14 13:07:08,435 INFO L125 PetriNetUnfolderBase]: For 557107/557115 co-relation queries the response was YES. [2024-06-14 13:07:08,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56994 conditions, 6931 events. 4506/6931 cut-off events. For 557107/557115 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40111 event pairs, 990 based on Foata normal form. 12/6940 useless extension candidates. Maximal degree in co-relation 56829. Up to 6716 conditions per place. [2024-06-14 13:07:08,528 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 449 selfloop transitions, 50 changer transitions 0/502 dead transitions. [2024-06-14 13:07:08,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 502 transitions, 9083 flow [2024-06-14 13:07:08,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:07:08,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:07:08,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:07:08,531 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-14 13:07:08,531 INFO L175 Difference]: Start difference. First operand has 339 places, 477 transitions, 7447 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:07:08,531 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 502 transitions, 9083 flow [2024-06-14 13:07:10,171 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 502 transitions, 8963 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:07:10,193 INFO L231 Difference]: Finished difference. Result has 343 places, 486 transitions, 7720 flow [2024-06-14 13:07:10,194 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7327, PETRI_DIFFERENCE_MINUEND_PLACES=332, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=434, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7720, PETRI_PLACES=343, PETRI_TRANSITIONS=486} [2024-06-14 13:07:10,194 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 13:07:10,194 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 486 transitions, 7720 flow [2024-06-14 13:07:10,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:10,195 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:10,195 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:10,195 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:07:10,195 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:10,195 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:10,195 INFO L85 PathProgramCache]: Analyzing trace with hash -2061671921, now seen corresponding path program 1 times [2024-06-14 13:07:10,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:10,196 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [800990028] [2024-06-14 13:07:10,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:10,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:10,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:11,086 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:11,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:11,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [800990028] [2024-06-14 13:07:11,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [800990028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:11,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:11,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:11,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812984246] [2024-06-14 13:07:11,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:11,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:11,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:11,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:11,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:11,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:11,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 486 transitions, 7720 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:11,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:11,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:11,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:12,740 INFO L124 PetriNetUnfolderBase]: 4500/6923 cut-off events. [2024-06-14 13:07:12,740 INFO L125 PetriNetUnfolderBase]: For 560711/560719 co-relation queries the response was YES. [2024-06-14 13:07:12,810 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57221 conditions, 6923 events. 4500/6923 cut-off events. For 560711/560719 co-relation queries the response was YES. Maximal size of possible extension queue 364. Compared 40092 event pairs, 993 based on Foata normal form. 10/6930 useless extension candidates. Maximal degree in co-relation 57053. Up to 6824 conditions per place. [2024-06-14 13:07:12,839 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 462 selfloop transitions, 33 changer transitions 0/498 dead transitions. [2024-06-14 13:07:12,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 498 transitions, 8806 flow [2024-06-14 13:07:12,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:07:12,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:07:12,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-14 13:07:12,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:07:12,840 INFO L175 Difference]: Start difference. First operand has 343 places, 486 transitions, 7720 flow. Second operand 6 states and 96 transitions. [2024-06-14 13:07:12,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 498 transitions, 8806 flow [2024-06-14 13:07:14,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 498 transitions, 8568 flow, removed 74 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:14,381 INFO L231 Difference]: Finished difference. Result has 343 places, 489 transitions, 7628 flow [2024-06-14 13:07:14,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7482, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=486, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7628, PETRI_PLACES=343, PETRI_TRANSITIONS=489} [2024-06-14 13:07:14,381 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 13:07:14,381 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 489 transitions, 7628 flow [2024-06-14 13:07:14,381 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:14,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:14,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:14,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:07:14,382 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:14,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:14,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1056241560, now seen corresponding path program 5 times [2024-06-14 13:07:14,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:14,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507857461] [2024-06-14 13:07:14,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:14,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:14,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:15,007 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:15,007 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:15,008 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507857461] [2024-06-14 13:07:15,008 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507857461] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:15,008 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:15,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:15,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1395785123] [2024-06-14 13:07:15,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:15,008 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:15,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:15,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:15,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:15,064 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:15,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 489 transitions, 7628 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:15,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:15,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:15,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:16,763 INFO L124 PetriNetUnfolderBase]: 4504/6930 cut-off events. [2024-06-14 13:07:16,763 INFO L125 PetriNetUnfolderBase]: For 571012/571020 co-relation queries the response was YES. [2024-06-14 13:07:16,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56770 conditions, 6930 events. 4504/6930 cut-off events. For 571012/571020 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40153 event pairs, 969 based on Foata normal form. 12/6938 useless extension candidates. Maximal degree in co-relation 56604. Up to 6831 conditions per place. [2024-06-14 13:07:16,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 473 selfloop transitions, 28 changer transitions 0/504 dead transitions. [2024-06-14 13:07:16,853 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 504 transitions, 8778 flow [2024-06-14 13:07:16,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:16,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:16,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 13:07:16,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-14 13:07:16,854 INFO L175 Difference]: Start difference. First operand has 343 places, 489 transitions, 7628 flow. Second operand 7 states and 107 transitions. [2024-06-14 13:07:16,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 504 transitions, 8778 flow [2024-06-14 13:07:18,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 504 transitions, 8665 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:18,330 INFO L231 Difference]: Finished difference. Result has 345 places, 493 transitions, 7688 flow [2024-06-14 13:07:18,330 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7515, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=489, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7688, PETRI_PLACES=345, PETRI_TRANSITIONS=493} [2024-06-14 13:07:18,330 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 303 predicate places. [2024-06-14 13:07:18,331 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 493 transitions, 7688 flow [2024-06-14 13:07:18,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:18,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:18,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:18,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:07:18,332 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:18,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:18,332 INFO L85 PathProgramCache]: Analyzing trace with hash -1063598945, now seen corresponding path program 4 times [2024-06-14 13:07:18,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:18,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994839535] [2024-06-14 13:07:18,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:18,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:18,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:19,159 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 13:07:19,159 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:19,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994839535] [2024-06-14 13:07:19,159 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994839535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:19,159 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:19,159 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:19,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1723997664] [2024-06-14 13:07:19,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:19,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:19,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:19,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:19,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:19,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:19,245 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 493 transitions, 7688 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:19,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:19,246 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:19,246 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:21,092 INFO L124 PetriNetUnfolderBase]: 4501/6928 cut-off events. [2024-06-14 13:07:21,093 INFO L125 PetriNetUnfolderBase]: For 559880/559880 co-relation queries the response was YES. [2024-06-14 13:07:21,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56672 conditions, 6928 events. 4501/6928 cut-off events. For 559880/559880 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 40206 event pairs, 1056 based on Foata normal form. 1/6927 useless extension candidates. Maximal degree in co-relation 56506. Up to 6859 conditions per place. [2024-06-14 13:07:21,180 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 482 selfloop transitions, 26 changer transitions 0/511 dead transitions. [2024-06-14 13:07:21,181 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 351 places, 511 transitions, 8766 flow [2024-06-14 13:07:21,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:21,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:07:21,182 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:07:21,182 INFO L175 Difference]: Start difference. First operand has 345 places, 493 transitions, 7688 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:07:21,182 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 351 places, 511 transitions, 8766 flow [2024-06-14 13:07:22,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 511 transitions, 8595 flow, removed 60 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:22,933 INFO L231 Difference]: Finished difference. Result has 347 places, 493 transitions, 7579 flow [2024-06-14 13:07:22,933 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7517, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7579, PETRI_PLACES=347, PETRI_TRANSITIONS=493} [2024-06-14 13:07:22,933 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:07:22,934 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 493 transitions, 7579 flow [2024-06-14 13:07:22,934 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:22,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:22,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:22,934 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:07:22,934 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:22,934 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:22,935 INFO L85 PathProgramCache]: Analyzing trace with hash -1063598790, now seen corresponding path program 6 times [2024-06-14 13:07:22,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:22,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248971037] [2024-06-14 13:07:22,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:22,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:22,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:23,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:23,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:23,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248971037] [2024-06-14 13:07:23,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248971037] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:23,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:23,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:23,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709969743] [2024-06-14 13:07:23,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:23,619 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:23,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:23,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:23,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:23,677 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:23,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 493 transitions, 7579 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:23,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:23,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:23,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:25,319 INFO L124 PetriNetUnfolderBase]: 4493/6915 cut-off events. [2024-06-14 13:07:25,319 INFO L125 PetriNetUnfolderBase]: For 564973/564981 co-relation queries the response was YES. [2024-06-14 13:07:25,386 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56159 conditions, 6915 events. 4493/6915 cut-off events. For 564973/564981 co-relation queries the response was YES. Maximal size of possible extension queue 362. Compared 40057 event pairs, 965 based on Foata normal form. 12/6924 useless extension candidates. Maximal degree in co-relation 55992. Up to 6637 conditions per place. [2024-06-14 13:07:25,413 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 444 selfloop transitions, 65 changer transitions 0/512 dead transitions. [2024-06-14 13:07:25,414 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 512 transitions, 8837 flow [2024-06-14 13:07:25,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:07:25,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:07:25,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:07:25,415 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:07:25,415 INFO L175 Difference]: Start difference. First operand has 347 places, 493 transitions, 7579 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:07:25,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 512 transitions, 8837 flow [2024-06-14 13:07:27,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 512 transitions, 8707 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:07:27,370 INFO L231 Difference]: Finished difference. Result has 348 places, 493 transitions, 7587 flow [2024-06-14 13:07:27,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7449, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7587, PETRI_PLACES=348, PETRI_TRANSITIONS=493} [2024-06-14 13:07:27,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 306 predicate places. [2024-06-14 13:07:27,371 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 493 transitions, 7587 flow [2024-06-14 13:07:27,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:27,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:27,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:27,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:07:27,372 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:27,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:27,372 INFO L85 PathProgramCache]: Analyzing trace with hash 268414877, now seen corresponding path program 1 times [2024-06-14 13:07:27,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:27,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348325034] [2024-06-14 13:07:27,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:27,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:27,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:28,023 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:28,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:28,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348325034] [2024-06-14 13:07:28,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348325034] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:28,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:28,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:28,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519932370] [2024-06-14 13:07:28,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:28,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:28,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:28,026 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:28,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:28,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:28,086 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 493 transitions, 7587 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:28,086 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:28,086 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:28,086 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:29,639 INFO L124 PetriNetUnfolderBase]: 4530/6965 cut-off events. [2024-06-14 13:07:29,639 INFO L125 PetriNetUnfolderBase]: For 583536/583540 co-relation queries the response was YES. [2024-06-14 13:07:29,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57329 conditions, 6965 events. 4530/6965 cut-off events. For 583536/583540 co-relation queries the response was YES. Maximal size of possible extension queue 366. Compared 40299 event pairs, 968 based on Foata normal form. 5/6968 useless extension candidates. Maximal degree in co-relation 57161. Up to 6836 conditions per place. [2024-06-14 13:07:29,742 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 480 selfloop transitions, 44 changer transitions 0/527 dead transitions. [2024-06-14 13:07:29,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 527 transitions, 9192 flow [2024-06-14 13:07:29,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:29,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:29,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:07:29,743 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 13:07:29,743 INFO L175 Difference]: Start difference. First operand has 348 places, 493 transitions, 7587 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:07:29,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 527 transitions, 9192 flow [2024-06-14 13:07:31,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 527 transitions, 9016 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:31,521 INFO L231 Difference]: Finished difference. Result has 352 places, 503 transitions, 7843 flow [2024-06-14 13:07:31,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7429, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7843, PETRI_PLACES=352, PETRI_TRANSITIONS=503} [2024-06-14 13:07:31,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:07:31,522 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 503 transitions, 7843 flow [2024-06-14 13:07:31,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:31,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:31,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:31,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:07:31,522 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:31,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash -1046925825, now seen corresponding path program 2 times [2024-06-14 13:07:31,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:31,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047591632] [2024-06-14 13:07:31,523 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:31,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:32,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:32,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:32,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047591632] [2024-06-14 13:07:32,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047591632] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:32,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:32,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:32,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269074359] [2024-06-14 13:07:32,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:32,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:32,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:32,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:32,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:32,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:32,336 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 503 transitions, 7843 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:32,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:32,336 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:32,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:34,005 INFO L124 PetriNetUnfolderBase]: 4527/6961 cut-off events. [2024-06-14 13:07:34,005 INFO L125 PetriNetUnfolderBase]: For 593283/593287 co-relation queries the response was YES. [2024-06-14 13:07:34,072 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57236 conditions, 6961 events. 4527/6961 cut-off events. For 593283/593287 co-relation queries the response was YES. Maximal size of possible extension queue 367. Compared 40238 event pairs, 989 based on Foata normal form. 5/6964 useless extension candidates. Maximal degree in co-relation 57066. Up to 6860 conditions per place. [2024-06-14 13:07:34,097 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 484 selfloop transitions, 35 changer transitions 0/522 dead transitions. [2024-06-14 13:07:34,097 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 522 transitions, 8949 flow [2024-06-14 13:07:34,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:34,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:34,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:07:34,112 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 13:07:34,112 INFO L175 Difference]: Start difference. First operand has 352 places, 503 transitions, 7843 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:07:34,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 522 transitions, 8949 flow [2024-06-14 13:07:35,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 522 transitions, 8794 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:35,956 INFO L231 Difference]: Finished difference. Result has 355 places, 503 transitions, 7764 flow [2024-06-14 13:07:35,956 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7688, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=468, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7764, PETRI_PLACES=355, PETRI_TRANSITIONS=503} [2024-06-14 13:07:35,957 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 13:07:35,957 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 503 transitions, 7764 flow [2024-06-14 13:07:35,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:35,957 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:35,957 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:35,957 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:07:35,957 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:35,958 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:35,958 INFO L85 PathProgramCache]: Analyzing trace with hash -206006213, now seen corresponding path program 3 times [2024-06-14 13:07:35,958 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:35,958 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498149482] [2024-06-14 13:07:35,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:35,958 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:35,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:36,657 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:36,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:36,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498149482] [2024-06-14 13:07:36,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498149482] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:36,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:36,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:36,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900712620] [2024-06-14 13:07:36,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:36,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:36,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:36,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:36,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:36,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:36,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 503 transitions, 7764 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:36,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:36,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:36,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:38,342 INFO L124 PetriNetUnfolderBase]: 4542/6982 cut-off events. [2024-06-14 13:07:38,343 INFO L125 PetriNetUnfolderBase]: For 605798/605802 co-relation queries the response was YES. [2024-06-14 13:07:38,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57528 conditions, 6982 events. 4542/6982 cut-off events. For 605798/605802 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 40364 event pairs, 993 based on Foata normal form. 5/6985 useless extension candidates. Maximal degree in co-relation 57357. Up to 6904 conditions per place. [2024-06-14 13:07:38,448 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 490 selfloop transitions, 34 changer transitions 0/527 dead transitions. [2024-06-14 13:07:38,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 527 transitions, 9065 flow [2024-06-14 13:07:38,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:38,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:38,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:07:38,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 13:07:38,450 INFO L175 Difference]: Start difference. First operand has 355 places, 503 transitions, 7764 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:07:38,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 527 transitions, 9065 flow [2024-06-14 13:07:40,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 357 places, 527 transitions, 8923 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:40,424 INFO L231 Difference]: Finished difference. Result has 359 places, 512 transitions, 7919 flow [2024-06-14 13:07:40,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7634, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7919, PETRI_PLACES=359, PETRI_TRANSITIONS=512} [2024-06-14 13:07:40,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 317 predicate places. [2024-06-14 13:07:40,425 INFO L495 AbstractCegarLoop]: Abstraction has has 359 places, 512 transitions, 7919 flow [2024-06-14 13:07:40,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:40,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:40,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:40,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:07:40,426 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:40,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:40,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1900521531, now seen corresponding path program 4 times [2024-06-14 13:07:40,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:40,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172513342] [2024-06-14 13:07:40,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:40,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:40,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:41,109 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:41,109 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:41,109 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172513342] [2024-06-14 13:07:41,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1172513342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:41,109 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:41,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:41,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758366076] [2024-06-14 13:07:41,110 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:41,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:41,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:41,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:41,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:41,184 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:41,185 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 359 places, 512 transitions, 7919 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:41,185 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:41,185 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:41,185 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:42,796 INFO L124 PetriNetUnfolderBase]: 4603/7067 cut-off events. [2024-06-14 13:07:42,797 INFO L125 PetriNetUnfolderBase]: For 647583/647591 co-relation queries the response was YES. [2024-06-14 13:07:42,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59315 conditions, 7067 events. 4603/7067 cut-off events. For 647583/647591 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40923 event pairs, 947 based on Foata normal form. 9/7073 useless extension candidates. Maximal degree in co-relation 59142. Up to 6595 conditions per place. [2024-06-14 13:07:42,900 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 119 changer transitions 0/550 dead transitions. [2024-06-14 13:07:42,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 550 transitions, 9854 flow [2024-06-14 13:07:42,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:42,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:42,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 135 transitions. [2024-06-14 13:07:42,901 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4115853658536585 [2024-06-14 13:07:42,901 INFO L175 Difference]: Start difference. First operand has 359 places, 512 transitions, 7919 flow. Second operand 8 states and 135 transitions. [2024-06-14 13:07:42,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 550 transitions, 9854 flow [2024-06-14 13:07:44,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 362 places, 550 transitions, 9726 flow, removed 37 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:44,911 INFO L231 Difference]: Finished difference. Result has 364 places, 526 transitions, 8477 flow [2024-06-14 13:07:44,911 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7791, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=512, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=106, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=404, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8477, PETRI_PLACES=364, PETRI_TRANSITIONS=526} [2024-06-14 13:07:44,911 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 13:07:44,912 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 526 transitions, 8477 flow [2024-06-14 13:07:44,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:44,912 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:44,912 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:44,912 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:07:44,912 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:44,912 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:44,912 INFO L85 PathProgramCache]: Analyzing trace with hash 1911949371, now seen corresponding path program 5 times [2024-06-14 13:07:44,913 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:44,913 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240550930] [2024-06-14 13:07:44,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:44,913 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:44,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:45,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:45,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:45,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240550930] [2024-06-14 13:07:45,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [240550930] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:45,604 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:45,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:45,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819621852] [2024-06-14 13:07:45,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:45,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:45,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:45,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:45,656 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:45,656 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 526 transitions, 8477 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:45,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:45,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:45,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:47,205 INFO L124 PetriNetUnfolderBase]: 4594/7056 cut-off events. [2024-06-14 13:07:47,205 INFO L125 PetriNetUnfolderBase]: For 658599/658607 co-relation queries the response was YES. [2024-06-14 13:07:47,291 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59565 conditions, 7056 events. 4594/7056 cut-off events. For 658599/658607 co-relation queries the response was YES. Maximal size of possible extension queue 373. Compared 40864 event pairs, 947 based on Foata normal form. 11/7063 useless extension candidates. Maximal degree in co-relation 59390. Up to 6588 conditions per place. [2024-06-14 13:07:47,321 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 434 selfloop transitions, 111 changer transitions 0/548 dead transitions. [2024-06-14 13:07:47,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 548 transitions, 9999 flow [2024-06-14 13:07:47,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:47,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:47,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-14 13:07:47,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40853658536585363 [2024-06-14 13:07:47,323 INFO L175 Difference]: Start difference. First operand has 364 places, 526 transitions, 8477 flow. Second operand 8 states and 134 transitions. [2024-06-14 13:07:47,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 548 transitions, 9999 flow [2024-06-14 13:07:49,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 367 places, 548 transitions, 9750 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-14 13:07:49,359 INFO L231 Difference]: Finished difference. Result has 368 places, 526 transitions, 8458 flow [2024-06-14 13:07:49,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8228, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=415, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8458, PETRI_PLACES=368, PETRI_TRANSITIONS=526} [2024-06-14 13:07:49,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 326 predicate places. [2024-06-14 13:07:49,360 INFO L495 AbstractCegarLoop]: Abstraction has has 368 places, 526 transitions, 8458 flow [2024-06-14 13:07:49,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:49,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:49,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:49,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:07:49,360 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:49,361 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:49,361 INFO L85 PathProgramCache]: Analyzing trace with hash 1862260677, now seen corresponding path program 6 times [2024-06-14 13:07:49,361 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:49,361 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081900236] [2024-06-14 13:07:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:49,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:49,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:50,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:50,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:50,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081900236] [2024-06-14 13:07:50,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081900236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:50,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:50,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:50,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860423490] [2024-06-14 13:07:50,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:50,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:50,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:50,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:50,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:50,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:50,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 368 places, 526 transitions, 8458 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:50,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:50,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:50,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:51,667 INFO L124 PetriNetUnfolderBase]: 4587/7046 cut-off events. [2024-06-14 13:07:51,667 INFO L125 PetriNetUnfolderBase]: For 661477/661485 co-relation queries the response was YES. [2024-06-14 13:07:51,746 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59495 conditions, 7046 events. 4587/7046 cut-off events. For 661477/661485 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 40725 event pairs, 972 based on Foata normal form. 9/7051 useless extension candidates. Maximal degree in co-relation 59319. Up to 6581 conditions per place. [2024-06-14 13:07:51,773 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 428 selfloop transitions, 120 changer transitions 0/551 dead transitions. [2024-06-14 13:07:51,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 551 transitions, 10164 flow [2024-06-14 13:07:51,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:51,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:51,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:07:51,775 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 13:07:51,775 INFO L175 Difference]: Start difference. First operand has 368 places, 526 transitions, 8458 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:07:51,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 551 transitions, 10164 flow [2024-06-14 13:07:53,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 551 transitions, 9823 flow, removed 71 selfloop flow, removed 5 redundant places. [2024-06-14 13:07:53,683 INFO L231 Difference]: Finished difference. Result has 371 places, 526 transitions, 8363 flow [2024-06-14 13:07:53,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8117, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8363, PETRI_PLACES=371, PETRI_TRANSITIONS=526} [2024-06-14 13:07:53,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:07:53,684 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 526 transitions, 8363 flow [2024-06-14 13:07:53,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:53,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:53,685 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:53,685 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:07:53,685 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:53,685 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:53,685 INFO L85 PathProgramCache]: Analyzing trace with hash 1862380647, now seen corresponding path program 7 times [2024-06-14 13:07:53,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:53,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464165188] [2024-06-14 13:07:53,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:53,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:53,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:54,378 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:54,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:54,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464165188] [2024-06-14 13:07:54,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464165188] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:54,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:54,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:54,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438794264] [2024-06-14 13:07:54,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:54,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:54,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:54,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:54,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:54,455 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:54,455 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 526 transitions, 8363 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:54,455 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:54,455 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:54,455 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:07:56,170 INFO L124 PetriNetUnfolderBase]: 4597/7060 cut-off events. [2024-06-14 13:07:56,170 INFO L125 PetriNetUnfolderBase]: For 674163/674171 co-relation queries the response was YES. [2024-06-14 13:07:56,247 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59640 conditions, 7060 events. 4597/7060 cut-off events. For 674163/674171 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40903 event pairs, 959 based on Foata normal form. 9/7065 useless extension candidates. Maximal degree in co-relation 59463. Up to 6854 conditions per place. [2024-06-14 13:07:56,274 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 484 selfloop transitions, 63 changer transitions 0/550 dead transitions. [2024-06-14 13:07:56,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 550 transitions, 9678 flow [2024-06-14 13:07:56,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:07:56,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:07:56,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:07:56,275 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 13:07:56,275 INFO L175 Difference]: Start difference. First operand has 371 places, 526 transitions, 8363 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:07:56,275 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 550 transitions, 9678 flow [2024-06-14 13:07:58,331 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 550 transitions, 9238 flow, removed 29 selfloop flow, removed 10 redundant places. [2024-06-14 13:07:58,338 INFO L231 Difference]: Finished difference. Result has 369 places, 532 transitions, 8210 flow [2024-06-14 13:07:58,338 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7948, PETRI_DIFFERENCE_MINUEND_PLACES=361, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=466, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8210, PETRI_PLACES=369, PETRI_TRANSITIONS=532} [2024-06-14 13:07:58,338 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 13:07:58,338 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 532 transitions, 8210 flow [2024-06-14 13:07:58,338 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:58,338 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:07:58,339 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:07:58,339 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:07:58,339 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:07:58,339 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:07:58,339 INFO L85 PathProgramCache]: Analyzing trace with hash -2078086459, now seen corresponding path program 8 times [2024-06-14 13:07:58,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:07:58,339 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138649438] [2024-06-14 13:07:58,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:07:58,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:07:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:07:59,079 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:07:59,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:07:59,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138649438] [2024-06-14 13:07:59,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138649438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:07:59,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:07:59,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:07:59,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [683185871] [2024-06-14 13:07:59,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:07:59,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:07:59,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:07:59,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:07:59,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:07:59,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:07:59,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 532 transitions, 8210 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:07:59,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:07:59,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:07:59,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:00,966 INFO L124 PetriNetUnfolderBase]: 4588/7048 cut-off events. [2024-06-14 13:08:00,966 INFO L125 PetriNetUnfolderBase]: For 682732/682740 co-relation queries the response was YES. [2024-06-14 13:08:01,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58843 conditions, 7048 events. 4588/7048 cut-off events. For 682732/682740 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40814 event pairs, 963 based on Foata normal form. 11/7055 useless extension candidates. Maximal degree in co-relation 58667. Up to 6770 conditions per place. [2024-06-14 13:08:01,057 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 473 selfloop transitions, 74 changer transitions 0/550 dead transitions. [2024-06-14 13:08:01,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 550 transitions, 9560 flow [2024-06-14 13:08:01,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:08:01,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:08:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:08:01,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 13:08:01,058 INFO L175 Difference]: Start difference. First operand has 369 places, 532 transitions, 8210 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:08:01,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 550 transitions, 9560 flow [2024-06-14 13:08:03,483 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 550 transitions, 9374 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:03,490 INFO L231 Difference]: Finished difference. Result has 372 places, 532 transitions, 8181 flow [2024-06-14 13:08:03,490 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8024, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8181, PETRI_PLACES=372, PETRI_TRANSITIONS=532} [2024-06-14 13:08:03,491 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 13:08:03,491 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 532 transitions, 8181 flow [2024-06-14 13:08:03,491 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:03,491 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:03,491 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:03,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:08:03,491 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:03,492 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:03,492 INFO L85 PathProgramCache]: Analyzing trace with hash 1682917341, now seen corresponding path program 9 times [2024-06-14 13:08:03,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:03,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [928024908] [2024-06-14 13:08:03,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:03,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:03,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:04,229 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:04,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:04,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [928024908] [2024-06-14 13:08:04,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [928024908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:04,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:04,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:04,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449396356] [2024-06-14 13:08:04,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:04,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:04,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:04,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:04,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:04,279 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:04,279 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 532 transitions, 8181 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:04,279 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:04,279 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:04,279 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:05,918 INFO L124 PetriNetUnfolderBase]: 4575/7030 cut-off events. [2024-06-14 13:08:05,918 INFO L125 PetriNetUnfolderBase]: For 684975/684983 co-relation queries the response was YES. [2024-06-14 13:08:05,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58586 conditions, 7030 events. 4575/7030 cut-off events. For 684975/684983 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40663 event pairs, 961 based on Foata normal form. 11/7037 useless extension candidates. Maximal degree in co-relation 58409. Up to 6758 conditions per place. [2024-06-14 13:08:06,026 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 472 selfloop transitions, 78 changer transitions 0/553 dead transitions. [2024-06-14 13:08:06,026 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 553 transitions, 9385 flow [2024-06-14 13:08:06,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:06,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:06,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 154 transitions. [2024-06-14 13:08:06,027 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375609756097561 [2024-06-14 13:08:06,027 INFO L175 Difference]: Start difference. First operand has 372 places, 532 transitions, 8181 flow. Second operand 10 states and 154 transitions. [2024-06-14 13:08:06,027 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 553 transitions, 9385 flow [2024-06-14 13:08:08,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 376 places, 553 transitions, 9127 flow, removed 70 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:08,489 INFO L231 Difference]: Finished difference. Result has 377 places, 532 transitions, 8086 flow [2024-06-14 13:08:08,489 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7923, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8086, PETRI_PLACES=377, PETRI_TRANSITIONS=532} [2024-06-14 13:08:08,489 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 335 predicate places. [2024-06-14 13:08:08,489 INFO L495 AbstractCegarLoop]: Abstraction has has 377 places, 532 transitions, 8086 flow [2024-06-14 13:08:08,490 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:08,490 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:08,490 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:08,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:08:08,490 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:08,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:08,490 INFO L85 PathProgramCache]: Analyzing trace with hash -390440769, now seen corresponding path program 10 times [2024-06-14 13:08:08,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:08,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848297125] [2024-06-14 13:08:08,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:08,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:08,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:09,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:09,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:09,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848297125] [2024-06-14 13:08:09,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848297125] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:09,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:09,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:09,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675122957] [2024-06-14 13:08:09,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:09,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:09,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:09,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:09,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:09,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:09,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 377 places, 532 transitions, 8086 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:09,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:09,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:09,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:10,983 INFO L124 PetriNetUnfolderBase]: 4566/7016 cut-off events. [2024-06-14 13:08:10,983 INFO L125 PetriNetUnfolderBase]: For 684462/684466 co-relation queries the response was YES. [2024-06-14 13:08:11,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58102 conditions, 7016 events. 4566/7016 cut-off events. For 684462/684466 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40597 event pairs, 991 based on Foata normal form. 7/7021 useless extension candidates. Maximal degree in co-relation 57924. Up to 6892 conditions per place. [2024-06-14 13:08:11,082 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 506 selfloop transitions, 45 changer transitions 0/554 dead transitions. [2024-06-14 13:08:11,083 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 383 places, 554 transitions, 9276 flow [2024-06-14 13:08:11,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:11,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:11,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:08:11,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 13:08:11,084 INFO L175 Difference]: Start difference. First operand has 377 places, 532 transitions, 8086 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:08:11,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 383 places, 554 transitions, 9276 flow [2024-06-14 13:08:13,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 554 transitions, 8992 flow, removed 39 selfloop flow, removed 10 redundant places. [2024-06-14 13:08:13,481 INFO L231 Difference]: Finished difference. Result has 374 places, 532 transitions, 7907 flow [2024-06-14 13:08:13,482 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7802, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7907, PETRI_PLACES=374, PETRI_TRANSITIONS=532} [2024-06-14 13:08:13,482 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-14 13:08:13,482 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 532 transitions, 7907 flow [2024-06-14 13:08:13,482 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:13,483 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:13,483 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:13,483 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:08:13,483 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:13,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:13,483 INFO L85 PathProgramCache]: Analyzing trace with hash 1387925725, now seen corresponding path program 11 times [2024-06-14 13:08:13,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:13,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321246350] [2024-06-14 13:08:13,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:13,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:13,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:14,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:14,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:14,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321246350] [2024-06-14 13:08:14,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321246350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:14,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:14,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:14,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028187379] [2024-06-14 13:08:14,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:14,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:14,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:14,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:14,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:14,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:14,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 532 transitions, 7907 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:14,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:14,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:14,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:15,761 INFO L124 PetriNetUnfolderBase]: 4557/7006 cut-off events. [2024-06-14 13:08:15,761 INFO L125 PetriNetUnfolderBase]: For 685684/685692 co-relation queries the response was YES. [2024-06-14 13:08:16,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57548 conditions, 7006 events. 4557/7006 cut-off events. For 685684/685692 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40528 event pairs, 993 based on Foata normal form. 11/7013 useless extension candidates. Maximal degree in co-relation 57369. Up to 6700 conditions per place. [2024-06-14 13:08:16,032 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 472 selfloop transitions, 79 changer transitions 0/554 dead transitions. [2024-06-14 13:08:16,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 380 places, 554 transitions, 9283 flow [2024-06-14 13:08:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:16,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:08:16,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:08:16,033 INFO L175 Difference]: Start difference. First operand has 374 places, 532 transitions, 7907 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:08:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 380 places, 554 transitions, 9283 flow [2024-06-14 13:08:17,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 554 transitions, 9109 flow, removed 40 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:17,941 INFO L231 Difference]: Finished difference. Result has 375 places, 532 transitions, 7904 flow [2024-06-14 13:08:17,942 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7735, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=79, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=453, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7904, PETRI_PLACES=375, PETRI_TRANSITIONS=532} [2024-06-14 13:08:17,942 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-14 13:08:17,942 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 532 transitions, 7904 flow [2024-06-14 13:08:17,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:17,942 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:17,942 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:17,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:08:17,942 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:17,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:17,943 INFO L85 PathProgramCache]: Analyzing trace with hash -385792629, now seen corresponding path program 12 times [2024-06-14 13:08:17,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:17,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1387205434] [2024-06-14 13:08:17,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:17,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:17,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:18,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:18,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1387205434] [2024-06-14 13:08:18,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1387205434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:18,660 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:18,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:08:18,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016001787] [2024-06-14 13:08:18,660 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:18,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:08:18,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:18,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:08:18,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:08:18,719 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:18,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 532 transitions, 7904 flow. Second operand has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:18,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:18,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:18,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:20,302 INFO L124 PetriNetUnfolderBase]: 4544/6988 cut-off events. [2024-06-14 13:08:20,302 INFO L125 PetriNetUnfolderBase]: For 672812/672820 co-relation queries the response was YES. [2024-06-14 13:08:20,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57139 conditions, 6988 events. 4544/6988 cut-off events. For 672812/672820 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 40477 event pairs, 985 based on Foata normal form. 11/6995 useless extension candidates. Maximal degree in co-relation 56959. Up to 6688 conditions per place. [2024-06-14 13:08:20,411 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 470 selfloop transitions, 80 changer transitions 0/553 dead transitions. [2024-06-14 13:08:20,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 553 transitions, 9096 flow [2024-06-14 13:08:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:08:20,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:08:20,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:08:20,412 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 13:08:20,413 INFO L175 Difference]: Start difference. First operand has 375 places, 532 transitions, 7904 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:08:20,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 553 transitions, 9096 flow [2024-06-14 13:08:22,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 553 transitions, 8866 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 13:08:22,776 INFO L231 Difference]: Finished difference. Result has 376 places, 532 transitions, 7848 flow [2024-06-14 13:08:22,777 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7674, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7848, PETRI_PLACES=376, PETRI_TRANSITIONS=532} [2024-06-14 13:08:22,777 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 13:08:22,777 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 532 transitions, 7848 flow [2024-06-14 13:08:22,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:22,777 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:22,778 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:22,778 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:08:22,778 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:22,778 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:22,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1222658959, now seen corresponding path program 1 times [2024-06-14 13:08:22,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:22,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659377259] [2024-06-14 13:08:22,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:22,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:22,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:23,788 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:23,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:23,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659377259] [2024-06-14 13:08:23,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659377259] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:23,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:23,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:23,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602969867] [2024-06-14 13:08:23,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:23,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:23,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:23,790 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:23,790 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:23,873 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:23,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 532 transitions, 7848 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:23,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:23,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:23,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:25,466 INFO L124 PetriNetUnfolderBase]: 4552/6998 cut-off events. [2024-06-14 13:08:25,466 INFO L125 PetriNetUnfolderBase]: For 666955/666959 co-relation queries the response was YES. [2024-06-14 13:08:25,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57128 conditions, 6998 events. 4552/6998 cut-off events. For 666955/666959 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 40519 event pairs, 973 based on Foata normal form. 6/7002 useless extension candidates. Maximal degree in co-relation 56948. Up to 6909 conditions per place. [2024-06-14 13:08:25,565 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 513 selfloop transitions, 32 changer transitions 0/548 dead transitions. [2024-06-14 13:08:25,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 548 transitions, 9028 flow [2024-06-14 13:08:25,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:08:25,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:08:25,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 13:08:25,567 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-14 13:08:25,567 INFO L175 Difference]: Start difference. First operand has 376 places, 532 transitions, 7848 flow. Second operand 6 states and 101 transitions. [2024-06-14 13:08:25,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 548 transitions, 9028 flow [2024-06-14 13:08:27,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 548 transitions, 8805 flow, removed 1 selfloop flow, removed 8 redundant places. [2024-06-14 13:08:27,908 INFO L231 Difference]: Finished difference. Result has 374 places, 534 transitions, 7744 flow [2024-06-14 13:08:27,909 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7625, PETRI_DIFFERENCE_MINUEND_PLACES=368, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=532, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7744, PETRI_PLACES=374, PETRI_TRANSITIONS=534} [2024-06-14 13:08:27,909 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-14 13:08:27,909 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 534 transitions, 7744 flow [2024-06-14 13:08:27,909 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:27,909 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:27,909 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:27,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:08:27,910 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:27,910 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:27,910 INFO L85 PathProgramCache]: Analyzing trace with hash 1624822579, now seen corresponding path program 2 times [2024-06-14 13:08:27,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:27,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127752618] [2024-06-14 13:08:27,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:27,910 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:27,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:28,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:28,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127752618] [2024-06-14 13:08:28,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127752618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:28,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:28,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:28,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706979382] [2024-06-14 13:08:28,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:28,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:28,990 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 534 transitions, 7744 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:28,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:28,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:28,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:30,552 INFO L124 PetriNetUnfolderBase]: 4547/6992 cut-off events. [2024-06-14 13:08:30,552 INFO L125 PetriNetUnfolderBase]: For 660184/660192 co-relation queries the response was YES. [2024-06-14 13:08:30,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56705 conditions, 6992 events. 4547/6992 cut-off events. For 660184/660192 co-relation queries the response was YES. Maximal size of possible extension queue 376. Compared 40482 event pairs, 979 based on Foata normal form. 10/6999 useless extension candidates. Maximal degree in co-relation 56525. Up to 6882 conditions per place. [2024-06-14 13:08:30,646 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 513 selfloop transitions, 30 changer transitions 0/546 dead transitions. [2024-06-14 13:08:30,647 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 546 transitions, 8908 flow [2024-06-14 13:08:30,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:08:30,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:08:30,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 93 transitions. [2024-06-14 13:08:30,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 13:08:30,649 INFO L175 Difference]: Start difference. First operand has 374 places, 534 transitions, 7744 flow. Second operand 6 states and 93 transitions. [2024-06-14 13:08:30,649 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 546 transitions, 8908 flow [2024-06-14 13:08:32,842 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 546 transitions, 8805 flow, removed 21 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:32,848 INFO L231 Difference]: Finished difference. Result has 376 places, 536 transitions, 7760 flow [2024-06-14 13:08:32,849 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7641, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=7760, PETRI_PLACES=376, PETRI_TRANSITIONS=536} [2024-06-14 13:08:32,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 13:08:32,849 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 536 transitions, 7760 flow [2024-06-14 13:08:32,849 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:32,849 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:32,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:32,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:08:32,850 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:32,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:32,850 INFO L85 PathProgramCache]: Analyzing trace with hash 1909101339, now seen corresponding path program 1 times [2024-06-14 13:08:32,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:32,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491085377] [2024-06-14 13:08:32,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:32,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:32,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:33,990 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:33,990 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:33,990 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491085377] [2024-06-14 13:08:33,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1491085377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:33,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:33,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:33,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900974194] [2024-06-14 13:08:33,991 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:33,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:33,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:33,991 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:33,991 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:34,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:34,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 536 transitions, 7760 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:34,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:34,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:34,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:35,805 INFO L124 PetriNetUnfolderBase]: 4555/7007 cut-off events. [2024-06-14 13:08:35,805 INFO L125 PetriNetUnfolderBase]: For 675293/675293 co-relation queries the response was YES. [2024-06-14 13:08:35,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57046 conditions, 7007 events. 4555/7007 cut-off events. For 675293/675293 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 40653 event pairs, 1011 based on Foata normal form. 2/7007 useless extension candidates. Maximal degree in co-relation 56865. Up to 6879 conditions per place. [2024-06-14 13:08:35,898 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 47 changer transitions 0/566 dead transitions. [2024-06-14 13:08:35,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 384 places, 566 transitions, 9296 flow [2024-06-14 13:08:35,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:35,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:35,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:08:35,899 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-14 13:08:35,900 INFO L175 Difference]: Start difference. First operand has 376 places, 536 transitions, 7760 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:08:35,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 384 places, 566 transitions, 9296 flow [2024-06-14 13:08:38,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 566 transitions, 9193 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:08:38,304 INFO L231 Difference]: Finished difference. Result has 381 places, 540 transitions, 7904 flow [2024-06-14 13:08:38,305 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7657, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=491, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7904, PETRI_PLACES=381, PETRI_TRANSITIONS=540} [2024-06-14 13:08:38,305 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-14 13:08:38,305 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 540 transitions, 7904 flow [2024-06-14 13:08:38,305 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:38,305 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:38,305 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:38,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:08:38,306 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:38,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:38,306 INFO L85 PathProgramCache]: Analyzing trace with hash 2098802085, now seen corresponding path program 2 times [2024-06-14 13:08:38,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:38,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117005727] [2024-06-14 13:08:38,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:38,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:38,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:39,175 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:39,175 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:39,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117005727] [2024-06-14 13:08:39,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117005727] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:39,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:39,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:39,176 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623431487] [2024-06-14 13:08:39,176 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:39,176 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:39,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:39,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:39,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:39,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:39,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 540 transitions, 7904 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:39,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:39,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:39,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:40,938 INFO L124 PetriNetUnfolderBase]: 4563/7019 cut-off events. [2024-06-14 13:08:40,939 INFO L125 PetriNetUnfolderBase]: For 690554/690554 co-relation queries the response was YES. [2024-06-14 13:08:41,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57426 conditions, 7019 events. 4563/7019 cut-off events. For 690554/690554 co-relation queries the response was YES. Maximal size of possible extension queue 380. Compared 40720 event pairs, 1050 based on Foata normal form. 2/7019 useless extension candidates. Maximal degree in co-relation 57244. Up to 6926 conditions per place. [2024-06-14 13:08:41,031 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 516 selfloop transitions, 44 changer transitions 0/563 dead transitions. [2024-06-14 13:08:41,031 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 389 places, 563 transitions, 9168 flow [2024-06-14 13:08:41,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:41,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:41,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 134 transitions. [2024-06-14 13:08:41,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36314363143631434 [2024-06-14 13:08:41,032 INFO L175 Difference]: Start difference. First operand has 381 places, 540 transitions, 7904 flow. Second operand 9 states and 134 transitions. [2024-06-14 13:08:41,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 389 places, 563 transitions, 9168 flow [2024-06-14 13:08:43,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 563 transitions, 9001 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:43,662 INFO L231 Difference]: Finished difference. Result has 385 places, 542 transitions, 7910 flow [2024-06-14 13:08:43,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7761, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=540, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=496, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7910, PETRI_PLACES=385, PETRI_TRANSITIONS=542} [2024-06-14 13:08:43,663 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 343 predicate places. [2024-06-14 13:08:43,663 INFO L495 AbstractCegarLoop]: Abstraction has has 385 places, 542 transitions, 7910 flow [2024-06-14 13:08:43,664 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:43,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:43,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:43,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:08:43,664 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:43,664 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:43,664 INFO L85 PathProgramCache]: Analyzing trace with hash 2098802209, now seen corresponding path program 1 times [2024-06-14 13:08:43,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:43,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561064626] [2024-06-14 13:08:43,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:43,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:43,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:44,533 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:44,534 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:44,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561064626] [2024-06-14 13:08:44,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561064626] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:44,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:44,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:44,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710114123] [2024-06-14 13:08:44,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:44,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:44,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:44,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:44,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:44,623 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:44,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 385 places, 542 transitions, 7910 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:44,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:44,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:44,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:46,289 INFO L124 PetriNetUnfolderBase]: 4703/7213 cut-off events. [2024-06-14 13:08:46,289 INFO L125 PetriNetUnfolderBase]: For 773509/773511 co-relation queries the response was YES. [2024-06-14 13:08:46,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60022 conditions, 7213 events. 4703/7213 cut-off events. For 773509/773511 co-relation queries the response was YES. Maximal size of possible extension queue 387. Compared 41880 event pairs, 781 based on Foata normal form. 10/7218 useless extension candidates. Maximal degree in co-relation 59838. Up to 5145 conditions per place. [2024-06-14 13:08:46,399 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 363 selfloop transitions, 234 changer transitions 0/600 dead transitions. [2024-06-14 13:08:46,399 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 600 transitions, 10588 flow [2024-06-14 13:08:46,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:46,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:46,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-14 13:08:46,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45257452574525747 [2024-06-14 13:08:46,400 INFO L175 Difference]: Start difference. First operand has 385 places, 542 transitions, 7910 flow. Second operand 9 states and 167 transitions. [2024-06-14 13:08:46,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 600 transitions, 10588 flow [2024-06-14 13:08:48,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 600 transitions, 10459 flow, removed 22 selfloop flow, removed 7 redundant places. [2024-06-14 13:08:48,938 INFO L231 Difference]: Finished difference. Result has 389 places, 560 transitions, 8811 flow [2024-06-14 13:08:48,938 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7781, PETRI_DIFFERENCE_MINUEND_PLACES=378, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=221, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8811, PETRI_PLACES=389, PETRI_TRANSITIONS=560} [2024-06-14 13:08:48,939 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 13:08:48,939 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 560 transitions, 8811 flow [2024-06-14 13:08:48,939 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:48,939 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:48,939 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:48,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:08:48,939 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:48,940 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:48,940 INFO L85 PathProgramCache]: Analyzing trace with hash 1911963073, now seen corresponding path program 2 times [2024-06-14 13:08:48,940 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:48,940 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145682506] [2024-06-14 13:08:48,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:48,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:48,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:49,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:49,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:49,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145682506] [2024-06-14 13:08:49,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145682506] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:49,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:49,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:49,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089755633] [2024-06-14 13:08:49,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:49,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:49,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:49,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:49,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:49,949 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:49,949 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 560 transitions, 8811 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:49,949 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:49,949 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:49,949 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:51,710 INFO L124 PetriNetUnfolderBase]: 4831/7392 cut-off events. [2024-06-14 13:08:51,710 INFO L125 PetriNetUnfolderBase]: For 847789/847791 co-relation queries the response was YES. [2024-06-14 13:08:51,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65254 conditions, 7392 events. 4831/7392 cut-off events. For 847789/847791 co-relation queries the response was YES. Maximal size of possible extension queue 395. Compared 42904 event pairs, 789 based on Foata normal form. 10/7396 useless extension candidates. Maximal degree in co-relation 65067. Up to 5752 conditions per place. [2024-06-14 13:08:51,838 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 382 selfloop transitions, 222 changer transitions 0/607 dead transitions. [2024-06-14 13:08:51,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 607 transitions, 11333 flow [2024-06-14 13:08:51,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:08:51,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:08:51,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:08:51,840 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:08:51,840 INFO L175 Difference]: Start difference. First operand has 389 places, 560 transitions, 8811 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:08:51,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 607 transitions, 11333 flow [2024-06-14 13:08:55,182 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 607 transitions, 10856 flow, removed 128 selfloop flow, removed 5 redundant places. [2024-06-14 13:08:55,189 INFO L231 Difference]: Finished difference. Result has 394 places, 572 transitions, 9160 flow [2024-06-14 13:08:55,189 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8382, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=344, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9160, PETRI_PLACES=394, PETRI_TRANSITIONS=572} [2024-06-14 13:08:55,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 352 predicate places. [2024-06-14 13:08:55,189 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 572 transitions, 9160 flow [2024-06-14 13:08:55,189 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:55,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:08:55,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:08:55,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:08:55,190 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:08:55,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:08:55,190 INFO L85 PathProgramCache]: Analyzing trace with hash 2101598719, now seen corresponding path program 3 times [2024-06-14 13:08:55,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:08:55,190 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9321945] [2024-06-14 13:08:55,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:08:55,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:08:55,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:08:56,238 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:08:56,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:08:56,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9321945] [2024-06-14 13:08:56,239 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9321945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:08:56,239 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:08:56,239 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:08:56,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338561818] [2024-06-14 13:08:56,239 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:08:56,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:08:56,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:08:56,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:08:56,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:08:56,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:08:56,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 572 transitions, 9160 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:08:56,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:08:56,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:08:56,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:08:58,329 INFO L124 PetriNetUnfolderBase]: 4879/7457 cut-off events. [2024-06-14 13:08:58,330 INFO L125 PetriNetUnfolderBase]: For 863410/863418 co-relation queries the response was YES. [2024-06-14 13:08:58,404 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66280 conditions, 7457 events. 4879/7457 cut-off events. For 863410/863418 co-relation queries the response was YES. Maximal size of possible extension queue 400. Compared 43295 event pairs, 980 based on Foata normal form. 12/7465 useless extension candidates. Maximal degree in co-relation 66092. Up to 6947 conditions per place. [2024-06-14 13:08:58,432 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 472 selfloop transitions, 132 changer transitions 0/607 dead transitions. [2024-06-14 13:08:58,432 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 607 transitions, 10898 flow [2024-06-14 13:08:58,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:08:58,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:08:58,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:08:58,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:08:58,433 INFO L175 Difference]: Start difference. First operand has 394 places, 572 transitions, 9160 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:08:58,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 607 transitions, 10898 flow [2024-06-14 13:09:01,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 607 transitions, 10495 flow, removed 63 selfloop flow, removed 4 redundant places. [2024-06-14 13:09:01,227 INFO L231 Difference]: Finished difference. Result has 401 places, 582 transitions, 9283 flow [2024-06-14 13:09:01,227 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8773, PETRI_DIFFERENCE_MINUEND_PLACES=390, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=443, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9283, PETRI_PLACES=401, PETRI_TRANSITIONS=582} [2024-06-14 13:09:01,228 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 359 predicate places. [2024-06-14 13:09:01,228 INFO L495 AbstractCegarLoop]: Abstraction has has 401 places, 582 transitions, 9283 flow [2024-06-14 13:09:01,228 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:01,228 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:01,228 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:01,228 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:09:01,228 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:01,229 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:01,229 INFO L85 PathProgramCache]: Analyzing trace with hash 2101598595, now seen corresponding path program 3 times [2024-06-14 13:09:01,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:01,229 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015262157] [2024-06-14 13:09:01,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:01,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:01,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:02,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:02,271 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:02,271 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015262157] [2024-06-14 13:09:02,271 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015262157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:02,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:02,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:02,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108525966] [2024-06-14 13:09:02,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:02,272 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:02,272 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:02,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:02,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:02,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:02,346 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 401 places, 582 transitions, 9283 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:02,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:02,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:02,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:04,150 INFO L124 PetriNetUnfolderBase]: 4887/7471 cut-off events. [2024-06-14 13:09:04,150 INFO L125 PetriNetUnfolderBase]: For 868648/868648 co-relation queries the response was YES. [2024-06-14 13:09:04,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66116 conditions, 7471 events. 4887/7471 cut-off events. For 868648/868648 co-relation queries the response was YES. Maximal size of possible extension queue 401. Compared 43296 event pairs, 1125 based on Foata normal form. 2/7471 useless extension candidates. Maximal degree in co-relation 65926. Up to 7396 conditions per place. [2024-06-14 13:09:04,275 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 33 changer transitions 0/602 dead transitions. [2024-06-14 13:09:04,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 409 places, 602 transitions, 10593 flow [2024-06-14 13:09:04,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:04,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:04,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 130 transitions. [2024-06-14 13:09:04,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3523035230352303 [2024-06-14 13:09:04,276 INFO L175 Difference]: Start difference. First operand has 401 places, 582 transitions, 9283 flow. Second operand 9 states and 130 transitions. [2024-06-14 13:09:04,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 409 places, 602 transitions, 10593 flow [2024-06-14 13:09:07,563 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 602 transitions, 10346 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:07,570 INFO L231 Difference]: Finished difference. Result has 404 places, 584 transitions, 9167 flow [2024-06-14 13:09:07,570 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9036, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=582, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=549, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9167, PETRI_PLACES=404, PETRI_TRANSITIONS=584} [2024-06-14 13:09:07,571 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 13:09:07,571 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 584 transitions, 9167 flow [2024-06-14 13:09:07,571 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:07,571 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:07,571 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:07,571 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:09:07,571 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:07,572 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:07,572 INFO L85 PathProgramCache]: Analyzing trace with hash 2027427223, now seen corresponding path program 4 times [2024-06-14 13:09:07,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:07,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363209033] [2024-06-14 13:09:07,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:07,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:07,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:08,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:08,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:08,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363209033] [2024-06-14 13:09:08,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363209033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:08,546 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:08,546 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:08,546 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463758112] [2024-06-14 13:09:08,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:08,547 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:08,547 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:08,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:08,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:08,654 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:08,654 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 584 transitions, 9167 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:08,654 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:08,654 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:08,654 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:10,559 INFO L124 PetriNetUnfolderBase]: 4907/7496 cut-off events. [2024-06-14 13:09:10,559 INFO L125 PetriNetUnfolderBase]: For 894500/894508 co-relation queries the response was YES. [2024-06-14 13:09:10,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66301 conditions, 7496 events. 4907/7496 cut-off events. For 894500/894508 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 43532 event pairs, 991 based on Foata normal form. 12/7505 useless extension candidates. Maximal degree in co-relation 66109. Up to 7209 conditions per place. [2024-06-14 13:09:10,674 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 522 selfloop transitions, 86 changer transitions 0/611 dead transitions. [2024-06-14 13:09:10,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 611 transitions, 10601 flow [2024-06-14 13:09:10,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:09:10,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:09:10,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 167 transitions. [2024-06-14 13:09:10,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37028824833702884 [2024-06-14 13:09:10,676 INFO L175 Difference]: Start difference. First operand has 404 places, 584 transitions, 9167 flow. Second operand 11 states and 167 transitions. [2024-06-14 13:09:10,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 611 transitions, 10601 flow [2024-06-14 13:09:14,478 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 611 transitions, 10490 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:14,485 INFO L231 Difference]: Finished difference. Result has 408 places, 588 transitions, 9345 flow [2024-06-14 13:09:14,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9056, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=498, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9345, PETRI_PLACES=408, PETRI_TRANSITIONS=588} [2024-06-14 13:09:14,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 13:09:14,486 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 588 transitions, 9345 flow [2024-06-14 13:09:14,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:14,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:14,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:14,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:09:14,487 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:14,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:14,487 INFO L85 PathProgramCache]: Analyzing trace with hash 2027254243, now seen corresponding path program 5 times [2024-06-14 13:09:14,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:14,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613041864] [2024-06-14 13:09:14,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:14,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:14,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:15,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:15,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:15,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613041864] [2024-06-14 13:09:15,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613041864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:15,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:15,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:15,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421788867] [2024-06-14 13:09:15,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:15,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:15,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:15,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:15,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:15,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 588 transitions, 9345 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:15,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:15,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:15,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:17,404 INFO L124 PetriNetUnfolderBase]: 4927/7525 cut-off events. [2024-06-14 13:09:17,405 INFO L125 PetriNetUnfolderBase]: For 913068/913076 co-relation queries the response was YES. [2024-06-14 13:09:17,492 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67044 conditions, 7525 events. 4927/7525 cut-off events. For 913068/913076 co-relation queries the response was YES. Maximal size of possible extension queue 408. Compared 43695 event pairs, 1012 based on Foata normal form. 12/7533 useless extension candidates. Maximal degree in co-relation 66851. Up to 7237 conditions per place. [2024-06-14 13:09:17,522 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 528 selfloop transitions, 80 changer transitions 0/611 dead transitions. [2024-06-14 13:09:17,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 611 transitions, 10763 flow [2024-06-14 13:09:17,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:09:17,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 13:09:17,523 INFO L175 Difference]: Start difference. First operand has 408 places, 588 transitions, 9345 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:09:17,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 611 transitions, 10763 flow [2024-06-14 13:09:21,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 407 places, 611 transitions, 10508 flow, removed 44 selfloop flow, removed 9 redundant places. [2024-06-14 13:09:21,105 INFO L231 Difference]: Finished difference. Result has 408 places, 592 transitions, 9375 flow [2024-06-14 13:09:21,105 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9090, PETRI_DIFFERENCE_MINUEND_PLACES=399, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=508, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9375, PETRI_PLACES=408, PETRI_TRANSITIONS=592} [2024-06-14 13:09:21,105 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 366 predicate places. [2024-06-14 13:09:21,105 INFO L495 AbstractCegarLoop]: Abstraction has has 408 places, 592 transitions, 9375 flow [2024-06-14 13:09:21,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:21,106 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:21,106 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:21,106 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:09:21,106 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:21,106 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:21,106 INFO L85 PathProgramCache]: Analyzing trace with hash 2027249593, now seen corresponding path program 6 times [2024-06-14 13:09:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1764544543] [2024-06-14 13:09:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:21,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:22,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:22,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:22,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1764544543] [2024-06-14 13:09:22,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1764544543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:22,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:22,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:22,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [83465020] [2024-06-14 13:09:22,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:22,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:22,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:22,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:22,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:22,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:22,072 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 408 places, 592 transitions, 9375 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:22,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:22,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:22,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:24,100 INFO L124 PetriNetUnfolderBase]: 5186/7887 cut-off events. [2024-06-14 13:09:24,100 INFO L125 PetriNetUnfolderBase]: For 1039444/1039446 co-relation queries the response was YES. [2024-06-14 13:09:24,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72202 conditions, 7887 events. 5186/7887 cut-off events. For 1039444/1039446 co-relation queries the response was YES. Maximal size of possible extension queue 428. Compared 45874 event pairs, 857 based on Foata normal form. 10/7891 useless extension candidates. Maximal degree in co-relation 72008. Up to 6704 conditions per place. [2024-06-14 13:09:24,225 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 479 selfloop transitions, 170 changer transitions 0/652 dead transitions. [2024-06-14 13:09:24,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 416 places, 652 transitions, 12184 flow [2024-06-14 13:09:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:24,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:24,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:09:24,226 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 13:09:24,226 INFO L175 Difference]: Start difference. First operand has 408 places, 592 transitions, 9375 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:09:24,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 416 places, 652 transitions, 12184 flow [2024-06-14 13:09:27,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 652 transitions, 11933 flow, removed 48 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:27,426 INFO L231 Difference]: Finished difference. Result has 412 places, 617 transitions, 10037 flow [2024-06-14 13:09:27,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9124, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10037, PETRI_PLACES=412, PETRI_TRANSITIONS=617} [2024-06-14 13:09:27,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 13:09:27,426 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 617 transitions, 10037 flow [2024-06-14 13:09:27,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:27,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:27,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:27,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:09:27,427 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:27,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:27,427 INFO L85 PathProgramCache]: Analyzing trace with hash 2027434167, now seen corresponding path program 1 times [2024-06-14 13:09:27,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:27,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494087967] [2024-06-14 13:09:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:27,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:27,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:28,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:28,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:28,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494087967] [2024-06-14 13:09:28,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494087967] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:28,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:28,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:28,372 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145767390] [2024-06-14 13:09:28,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:28,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:28,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:28,373 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:28,373 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:28,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:28,431 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 617 transitions, 10037 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:28,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:28,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:28,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:30,310 INFO L124 PetriNetUnfolderBase]: 5202/7909 cut-off events. [2024-06-14 13:09:30,311 INFO L125 PetriNetUnfolderBase]: For 1049054/1049062 co-relation queries the response was YES. [2024-06-14 13:09:30,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73523 conditions, 7909 events. 5202/7909 cut-off events. For 1049054/1049062 co-relation queries the response was YES. Maximal size of possible extension queue 431. Compared 45960 event pairs, 1015 based on Foata normal form. 12/7917 useless extension candidates. Maximal degree in co-relation 73326. Up to 7694 conditions per place. [2024-06-14 13:09:30,435 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 573 selfloop transitions, 61 changer transitions 0/637 dead transitions. [2024-06-14 13:09:30,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 419 places, 637 transitions, 11475 flow [2024-06-14 13:09:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:09:30,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:09:30,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 126 transitions. [2024-06-14 13:09:30,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38414634146341464 [2024-06-14 13:09:30,437 INFO L175 Difference]: Start difference. First operand has 412 places, 617 transitions, 10037 flow. Second operand 8 states and 126 transitions. [2024-06-14 13:09:30,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 419 places, 637 transitions, 11475 flow [2024-06-14 13:09:33,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 637 transitions, 11252 flow, removed 86 selfloop flow, removed 2 redundant places. [2024-06-14 13:09:33,501 INFO L231 Difference]: Finished difference. Result has 418 places, 620 transitions, 10046 flow [2024-06-14 13:09:33,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9814, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=617, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10046, PETRI_PLACES=418, PETRI_TRANSITIONS=620} [2024-06-14 13:09:33,502 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-14 13:09:33,502 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 620 transitions, 10046 flow [2024-06-14 13:09:33,502 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:33,502 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:33,502 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:33,502 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:09:33,503 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:33,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:33,503 INFO L85 PathProgramCache]: Analyzing trace with hash 2027249469, now seen corresponding path program 4 times [2024-06-14 13:09:33,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:33,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488166296] [2024-06-14 13:09:33,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:33,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:33,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:34,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:34,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:34,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488166296] [2024-06-14 13:09:34,366 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488166296] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:34,366 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:34,366 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:34,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2071032123] [2024-06-14 13:09:34,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:34,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:34,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:34,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:34,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:34,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:34,423 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 620 transitions, 10046 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:34,423 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:34,423 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:34,423 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:36,441 INFO L124 PetriNetUnfolderBase]: 5210/7923 cut-off events. [2024-06-14 13:09:36,441 INFO L125 PetriNetUnfolderBase]: For 1054476/1054476 co-relation queries the response was YES. [2024-06-14 13:09:36,539 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73520 conditions, 7923 events. 5210/7923 cut-off events. For 1054476/1054476 co-relation queries the response was YES. Maximal size of possible extension queue 432. Compared 46082 event pairs, 1144 based on Foata normal form. 2/7923 useless extension candidates. Maximal degree in co-relation 73321. Up to 7863 conditions per place. [2024-06-14 13:09:36,573 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 609 selfloop transitions, 25 changer transitions 0/637 dead transitions. [2024-06-14 13:09:36,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 426 places, 637 transitions, 11418 flow [2024-06-14 13:09:36,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:36,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:36,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-14 13:09:36,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-14 13:09:36,574 INFO L175 Difference]: Start difference. First operand has 418 places, 620 transitions, 10046 flow. Second operand 9 states and 126 transitions. [2024-06-14 13:09:36,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 426 places, 637 transitions, 11418 flow [2024-06-14 13:09:39,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 420 places, 637 transitions, 11208 flow, removed 46 selfloop flow, removed 6 redundant places. [2024-06-14 13:09:39,674 INFO L231 Difference]: Finished difference. Result has 421 places, 622 transitions, 9955 flow [2024-06-14 13:09:39,674 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9836, PETRI_DIFFERENCE_MINUEND_PLACES=412, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=620, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9955, PETRI_PLACES=421, PETRI_TRANSITIONS=622} [2024-06-14 13:09:39,674 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 379 predicate places. [2024-06-14 13:09:39,675 INFO L495 AbstractCegarLoop]: Abstraction has has 421 places, 622 transitions, 9955 flow [2024-06-14 13:09:39,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:39,675 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:39,675 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:39,675 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:09:39,675 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:39,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:39,675 INFO L85 PathProgramCache]: Analyzing trace with hash -351776179, now seen corresponding path program 2 times [2024-06-14 13:09:39,676 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:39,676 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [317669451] [2024-06-14 13:09:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:39,676 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:39,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:40,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:40,612 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:40,612 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [317669451] [2024-06-14 13:09:40,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [317669451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:40,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:40,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:40,612 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834583592] [2024-06-14 13:09:40,612 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:40,612 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:40,613 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:40,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:40,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:40,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:40,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 421 places, 622 transitions, 9955 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:40,717 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:40,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:40,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:42,696 INFO L124 PetriNetUnfolderBase]: 5226/7944 cut-off events. [2024-06-14 13:09:42,696 INFO L125 PetriNetUnfolderBase]: For 1080997/1081005 co-relation queries the response was YES. [2024-06-14 13:09:42,798 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73635 conditions, 7944 events. 5226/7944 cut-off events. For 1080997/1081005 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 46200 event pairs, 1050 based on Foata normal form. 12/7953 useless extension candidates. Maximal degree in co-relation 73435. Up to 7847 conditions per place. [2024-06-14 13:09:42,833 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 598 selfloop transitions, 36 changer transitions 0/637 dead transitions. [2024-06-14 13:09:42,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 637 transitions, 11367 flow [2024-06-14 13:09:42,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:09:42,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:09:42,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 126 transitions. [2024-06-14 13:09:42,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34146341463414637 [2024-06-14 13:09:42,834 INFO L175 Difference]: Start difference. First operand has 421 places, 622 transitions, 9955 flow. Second operand 9 states and 126 transitions. [2024-06-14 13:09:42,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 637 transitions, 11367 flow [2024-06-14 13:09:46,009 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 637 transitions, 11268 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:46,016 INFO L231 Difference]: Finished difference. Result has 423 places, 625 transitions, 10044 flow [2024-06-14 13:09:46,017 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9856, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10044, PETRI_PLACES=423, PETRI_TRANSITIONS=625} [2024-06-14 13:09:46,017 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 13:09:46,017 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 625 transitions, 10044 flow [2024-06-14 13:09:46,017 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:46,017 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:46,017 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:46,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:09:46,018 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:46,018 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:46,018 INFO L85 PathProgramCache]: Analyzing trace with hash -1649222547, now seen corresponding path program 3 times [2024-06-14 13:09:46,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:46,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108516187] [2024-06-14 13:09:46,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:46,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:46,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:47,046 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:47,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:47,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108516187] [2024-06-14 13:09:47,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108516187] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:47,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:47,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:47,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823182606] [2024-06-14 13:09:47,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:47,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:47,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:47,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:47,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:47,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:47,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 625 transitions, 10044 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:47,106 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:47,106 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:47,106 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:48,989 INFO L124 PetriNetUnfolderBase]: 5242/7969 cut-off events. [2024-06-14 13:09:48,989 INFO L125 PetriNetUnfolderBase]: For 1104653/1104661 co-relation queries the response was YES. [2024-06-14 13:09:49,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74246 conditions, 7969 events. 5242/7969 cut-off events. For 1104653/1104661 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46344 event pairs, 1059 based on Foata normal form. 12/7977 useless extension candidates. Maximal degree in co-relation 74045. Up to 7842 conditions per place. [2024-06-14 13:09:49,126 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 594 selfloop transitions, 42 changer transitions 0/639 dead transitions. [2024-06-14 13:09:49,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 639 transitions, 11464 flow [2024-06-14 13:09:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:49,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:49,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-14 13:09:49,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37630662020905925 [2024-06-14 13:09:49,127 INFO L175 Difference]: Start difference. First operand has 423 places, 625 transitions, 10044 flow. Second operand 7 states and 108 transitions. [2024-06-14 13:09:49,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 639 transitions, 11464 flow [2024-06-14 13:09:52,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 639 transitions, 11299 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-14 13:09:52,452 INFO L231 Difference]: Finished difference. Result has 423 places, 628 transitions, 10089 flow [2024-06-14 13:09:52,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9879, PETRI_DIFFERENCE_MINUEND_PLACES=416, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=625, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=583, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10089, PETRI_PLACES=423, PETRI_TRANSITIONS=628} [2024-06-14 13:09:52,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 13:09:52,453 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 628 transitions, 10089 flow [2024-06-14 13:09:52,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:52,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:52,453 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:52,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:09:52,454 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:52,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:52,454 INFO L85 PathProgramCache]: Analyzing trace with hash 1624531613, now seen corresponding path program 1 times [2024-06-14 13:09:52,454 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:52,454 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1477371931] [2024-06-14 13:09:52,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:52,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:52,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:53,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:53,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1477371931] [2024-06-14 13:09:53,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1477371931] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:53,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:53,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:53,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1774318185] [2024-06-14 13:09:53,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:53,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:53,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:53,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:53,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:53,464 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:53,464 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 628 transitions, 10089 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:53,464 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:53,464 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:53,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:09:55,489 INFO L124 PetriNetUnfolderBase]: 5244/7972 cut-off events. [2024-06-14 13:09:55,489 INFO L125 PetriNetUnfolderBase]: For 1110943/1110951 co-relation queries the response was YES. [2024-06-14 13:09:55,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74347 conditions, 7972 events. 5244/7972 cut-off events. For 1110943/1110951 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 46356 event pairs, 1090 based on Foata normal form. 10/7978 useless extension candidates. Maximal degree in co-relation 74145. Up to 7847 conditions per place. [2024-06-14 13:09:55,628 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 596 selfloop transitions, 44 changer transitions 0/643 dead transitions. [2024-06-14 13:09:55,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 429 places, 643 transitions, 11557 flow [2024-06-14 13:09:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:09:55,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:09:55,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:09:55,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-14 13:09:55,629 INFO L175 Difference]: Start difference. First operand has 423 places, 628 transitions, 10089 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:09:55,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 429 places, 643 transitions, 11557 flow [2024-06-14 13:09:58,397 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 424 places, 643 transitions, 11373 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 13:09:58,405 INFO L231 Difference]: Finished difference. Result has 425 places, 632 transitions, 10155 flow [2024-06-14 13:09:58,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9907, PETRI_DIFFERENCE_MINUEND_PLACES=418, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=628, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10155, PETRI_PLACES=425, PETRI_TRANSITIONS=632} [2024-06-14 13:09:58,406 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 383 predicate places. [2024-06-14 13:09:58,406 INFO L495 AbstractCegarLoop]: Abstraction has has 425 places, 632 transitions, 10155 flow [2024-06-14 13:09:58,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:58,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:09:58,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:09:58,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:09:58,406 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:09:58,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:09:58,407 INFO L85 PathProgramCache]: Analyzing trace with hash -1193024257, now seen corresponding path program 4 times [2024-06-14 13:09:58,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:09:58,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065825755] [2024-06-14 13:09:58,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:09:58,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:09:58,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:09:59,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:09:59,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:09:59,431 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065825755] [2024-06-14 13:09:59,431 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065825755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:09:59,431 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:09:59,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:09:59,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103339072] [2024-06-14 13:09:59,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:09:59,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:09:59,432 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:09:59,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:09:59,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:09:59,503 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:09:59,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 425 places, 632 transitions, 10155 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:09:59,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:09:59,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:09:59,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:01,480 INFO L124 PetriNetUnfolderBase]: 5260/7996 cut-off events. [2024-06-14 13:10:01,480 INFO L125 PetriNetUnfolderBase]: For 1120760/1120768 co-relation queries the response was YES. [2024-06-14 13:10:01,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74391 conditions, 7996 events. 5260/7996 cut-off events. For 1120760/1120768 co-relation queries the response was YES. Maximal size of possible extension queue 439. Compared 46526 event pairs, 1077 based on Foata normal form. 12/8004 useless extension candidates. Maximal degree in co-relation 74188. Up to 7852 conditions per place. [2024-06-14 13:10:01,621 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 597 selfloop transitions, 48 changer transitions 0/648 dead transitions. [2024-06-14 13:10:01,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 648 transitions, 11607 flow [2024-06-14 13:10:01,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:01,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:01,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 128 transitions. [2024-06-14 13:10:01,623 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34688346883468835 [2024-06-14 13:10:01,623 INFO L175 Difference]: Start difference. First operand has 425 places, 632 transitions, 10155 flow. Second operand 9 states and 128 transitions. [2024-06-14 13:10:01,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 648 transitions, 11607 flow [2024-06-14 13:10:05,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 428 places, 648 transitions, 11413 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:05,112 INFO L231 Difference]: Finished difference. Result has 429 places, 635 transitions, 10181 flow [2024-06-14 13:10:05,112 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9961, PETRI_DIFFERENCE_MINUEND_PLACES=420, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=584, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10181, PETRI_PLACES=429, PETRI_TRANSITIONS=635} [2024-06-14 13:10:05,112 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 387 predicate places. [2024-06-14 13:10:05,112 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 635 transitions, 10181 flow [2024-06-14 13:10:05,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:05,113 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:05,113 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:05,113 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:10:05,113 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:05,113 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:05,113 INFO L85 PathProgramCache]: Analyzing trace with hash 680027253, now seen corresponding path program 7 times [2024-06-14 13:10:05,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:05,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081120682] [2024-06-14 13:10:05,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:05,114 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:05,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:06,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:06,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:06,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081120682] [2024-06-14 13:10:06,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081120682] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:06,085 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:06,085 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:06,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175505415] [2024-06-14 13:10:06,085 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:06,085 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:06,085 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:06,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:06,086 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:06,166 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:06,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 635 transitions, 10181 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:06,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:06,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:06,167 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:08,205 INFO L124 PetriNetUnfolderBase]: 5280/8024 cut-off events. [2024-06-14 13:10:08,205 INFO L125 PetriNetUnfolderBase]: For 1143479/1143487 co-relation queries the response was YES. [2024-06-14 13:10:08,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74975 conditions, 8024 events. 5280/8024 cut-off events. For 1143479/1143487 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 46687 event pairs, 1079 based on Foata normal form. 12/8032 useless extension candidates. Maximal degree in co-relation 74771. Up to 7906 conditions per place. [2024-06-14 13:10:08,340 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 614 selfloop transitions, 35 changer transitions 0/652 dead transitions. [2024-06-14 13:10:08,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 652 transitions, 11671 flow [2024-06-14 13:10:08,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:08,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:08,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:10:08,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 13:10:08,342 INFO L175 Difference]: Start difference. First operand has 429 places, 635 transitions, 10181 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:10:08,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 652 transitions, 11671 flow [2024-06-14 13:10:10,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 652 transitions, 11416 flow, removed 57 selfloop flow, removed 10 redundant places. [2024-06-14 13:10:10,869 INFO L231 Difference]: Finished difference. Result has 427 places, 639 transitions, 10145 flow [2024-06-14 13:10:10,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9926, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=635, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=600, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10145, PETRI_PLACES=427, PETRI_TRANSITIONS=639} [2024-06-14 13:10:10,870 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 385 predicate places. [2024-06-14 13:10:10,870 INFO L495 AbstractCegarLoop]: Abstraction has has 427 places, 639 transitions, 10145 flow [2024-06-14 13:10:10,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:10,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:10,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:10,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:10:10,870 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:10,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:10,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1624828531, now seen corresponding path program 5 times [2024-06-14 13:10:10,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:10,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430911060] [2024-06-14 13:10:10,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:10,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:10,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:11,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:11,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:11,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430911060] [2024-06-14 13:10:11,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430911060] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:11,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:11,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:11,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500640958] [2024-06-14 13:10:11,778 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:11,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:11,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:11,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:11,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:11,845 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:11,845 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 427 places, 639 transitions, 10145 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:11,845 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:11,845 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:11,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:13,756 INFO L124 PetriNetUnfolderBase]: 5283/8029 cut-off events. [2024-06-14 13:10:13,757 INFO L125 PetriNetUnfolderBase]: For 1151601/1151609 co-relation queries the response was YES. [2024-06-14 13:10:13,854 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74733 conditions, 8029 events. 5283/8029 cut-off events. For 1151601/1151609 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 46686 event pairs, 1092 based on Foata normal form. 12/8037 useless extension candidates. Maximal degree in co-relation 74530. Up to 7916 conditions per place. [2024-06-14 13:10:13,887 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 616 selfloop transitions, 34 changer transitions 0/653 dead transitions. [2024-06-14 13:10:13,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 433 places, 653 transitions, 11595 flow [2024-06-14 13:10:13,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:10:13,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:10:13,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 107 transitions. [2024-06-14 13:10:13,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37282229965156793 [2024-06-14 13:10:13,888 INFO L175 Difference]: Start difference. First operand has 427 places, 639 transitions, 10145 flow. Second operand 7 states and 107 transitions. [2024-06-14 13:10:13,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 433 places, 653 transitions, 11595 flow [2024-06-14 13:10:17,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 653 transitions, 11410 flow, removed 60 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:17,877 INFO L231 Difference]: Finished difference. Result has 428 places, 642 transitions, 10160 flow [2024-06-14 13:10:17,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9960, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=639, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=605, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10160, PETRI_PLACES=428, PETRI_TRANSITIONS=642} [2024-06-14 13:10:17,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-14 13:10:17,877 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 642 transitions, 10160 flow [2024-06-14 13:10:17,878 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:17,878 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:17,878 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:17,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:10:17,878 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:17,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:17,879 INFO L85 PathProgramCache]: Analyzing trace with hash 1388176577, now seen corresponding path program 8 times [2024-06-14 13:10:17,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:17,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1629269048] [2024-06-14 13:10:17,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:17,879 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:17,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:18,758 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:18,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:18,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1629269048] [2024-06-14 13:10:18,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1629269048] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:18,758 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:18,758 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:18,758 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1979885749] [2024-06-14 13:10:18,759 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:18,759 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:18,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:18,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:18,759 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:18,853 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:18,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 642 transitions, 10160 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:18,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:18,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:18,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:21,113 INFO L124 PetriNetUnfolderBase]: 5363/8143 cut-off events. [2024-06-14 13:10:21,113 INFO L125 PetriNetUnfolderBase]: For 1216402/1216404 co-relation queries the response was YES. [2024-06-14 13:10:21,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76421 conditions, 8143 events. 5363/8143 cut-off events. For 1216402/1216404 co-relation queries the response was YES. Maximal size of possible extension queue 447. Compared 47464 event pairs, 877 based on Foata normal form. 10/8147 useless extension candidates. Maximal degree in co-relation 76217. Up to 6835 conditions per place. [2024-06-14 13:10:21,267 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 469 selfloop transitions, 212 changer transitions 0/684 dead transitions. [2024-06-14 13:10:21,267 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 684 transitions, 12617 flow [2024-06-14 13:10:21,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:21,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:21,268 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-14 13:10:21,268 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4420731707317073 [2024-06-14 13:10:21,268 INFO L175 Difference]: Start difference. First operand has 428 places, 642 transitions, 10160 flow. Second operand 8 states and 145 transitions. [2024-06-14 13:10:21,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 684 transitions, 12617 flow [2024-06-14 13:10:24,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 684 transitions, 12439 flow, removed 57 selfloop flow, removed 5 redundant places. [2024-06-14 13:10:24,837 INFO L231 Difference]: Finished difference. Result has 432 places, 651 transitions, 10819 flow [2024-06-14 13:10:24,837 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9982, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=642, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=203, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10819, PETRI_PLACES=432, PETRI_TRANSITIONS=651} [2024-06-14 13:10:24,837 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 390 predicate places. [2024-06-14 13:10:24,838 INFO L495 AbstractCegarLoop]: Abstraction has has 432 places, 651 transitions, 10819 flow [2024-06-14 13:10:24,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:24,838 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:24,838 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:24,838 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:10:24,838 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:24,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:24,839 INFO L85 PathProgramCache]: Analyzing trace with hash 1388171927, now seen corresponding path program 9 times [2024-06-14 13:10:24,839 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:24,839 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090639545] [2024-06-14 13:10:24,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:24,839 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:24,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:25,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:25,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:25,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090639545] [2024-06-14 13:10:25,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090639545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:25,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:25,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:25,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275298393] [2024-06-14 13:10:25,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:25,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:25,927 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:25,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:25,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:25,983 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:25,983 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 432 places, 651 transitions, 10819 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:25,983 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:25,983 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:25,983 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:28,255 INFO L124 PetriNetUnfolderBase]: 5403/8197 cut-off events. [2024-06-14 13:10:28,256 INFO L125 PetriNetUnfolderBase]: For 1242905/1242913 co-relation queries the response was YES. [2024-06-14 13:10:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78946 conditions, 8197 events. 5403/8197 cut-off events. For 1242905/1242913 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 47851 event pairs, 1063 based on Foata normal form. 12/8205 useless extension candidates. Maximal degree in co-relation 78740. Up to 7739 conditions per place. [2024-06-14 13:10:28,382 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 579 selfloop transitions, 104 changer transitions 0/686 dead transitions. [2024-06-14 13:10:28,382 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 686 transitions, 12911 flow [2024-06-14 13:10:28,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:28,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:28,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:10:28,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 13:10:28,383 INFO L175 Difference]: Start difference. First operand has 432 places, 651 transitions, 10819 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:10:28,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 686 transitions, 12911 flow [2024-06-14 13:10:31,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 686 transitions, 12240 flow, removed 109 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:31,745 INFO L231 Difference]: Finished difference. Result has 435 places, 661 transitions, 10761 flow [2024-06-14 13:10:31,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10186, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=651, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10761, PETRI_PLACES=435, PETRI_TRANSITIONS=661} [2024-06-14 13:10:31,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-14 13:10:31,746 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 661 transitions, 10761 flow [2024-06-14 13:10:31,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:31,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:31,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:31,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:10:31,747 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:31,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:31,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1193208955, now seen corresponding path program 5 times [2024-06-14 13:10:31,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:31,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605994650] [2024-06-14 13:10:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:31,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:31,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:32,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:32,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:32,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605994650] [2024-06-14 13:10:32,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605994650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:32,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:32,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:32,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681832789] [2024-06-14 13:10:32,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:32,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:32,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:32,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:32,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:32,660 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:32,660 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 661 transitions, 10761 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:32,660 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:32,660 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:32,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:34,819 INFO L124 PetriNetUnfolderBase]: 5398/8192 cut-off events. [2024-06-14 13:10:34,819 INFO L125 PetriNetUnfolderBase]: For 1234569/1234569 co-relation queries the response was YES. [2024-06-14 13:10:34,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77777 conditions, 8192 events. 5398/8192 cut-off events. For 1234569/1234569 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 47700 event pairs, 1150 based on Foata normal form. 2/8192 useless extension candidates. Maximal degree in co-relation 77570. Up to 8099 conditions per place. [2024-06-14 13:10:34,961 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 651 selfloop transitions, 30 changer transitions 0/684 dead transitions. [2024-06-14 13:10:34,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 442 places, 684 transitions, 12201 flow [2024-06-14 13:10:34,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:34,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:34,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:10:34,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 13:10:34,962 INFO L175 Difference]: Start difference. First operand has 435 places, 661 transitions, 10761 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:10:34,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 442 places, 684 transitions, 12201 flow [2024-06-14 13:10:38,806 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 684 transitions, 11899 flow, removed 105 selfloop flow, removed 4 redundant places. [2024-06-14 13:10:38,814 INFO L231 Difference]: Finished difference. Result has 439 places, 661 transitions, 10527 flow [2024-06-14 13:10:38,814 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10459, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10527, PETRI_PLACES=439, PETRI_TRANSITIONS=661} [2024-06-14 13:10:38,815 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-14 13:10:38,815 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 661 transitions, 10527 flow [2024-06-14 13:10:38,815 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:38,815 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:38,815 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:38,815 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:10:38,815 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:38,816 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:38,816 INFO L85 PathProgramCache]: Analyzing trace with hash -1193031201, now seen corresponding path program 10 times [2024-06-14 13:10:38,816 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:38,816 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72157585] [2024-06-14 13:10:38,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:38,816 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:38,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:39,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:39,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:39,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72157585] [2024-06-14 13:10:39,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72157585] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:39,804 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:39,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:39,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748781811] [2024-06-14 13:10:39,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:39,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:39,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:39,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:39,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:39,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:39,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 661 transitions, 10527 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:39,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:39,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:39,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:41,986 INFO L124 PetriNetUnfolderBase]: 5402/8195 cut-off events. [2024-06-14 13:10:41,986 INFO L125 PetriNetUnfolderBase]: For 1250379/1250387 co-relation queries the response was YES. [2024-06-14 13:10:42,095 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77301 conditions, 8195 events. 5402/8195 cut-off events. For 1250379/1250387 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 47840 event pairs, 1069 based on Foata normal form. 12/8204 useless extension candidates. Maximal degree in co-relation 77092. Up to 7880 conditions per place. [2024-06-14 13:10:42,132 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 597 selfloop transitions, 82 changer transitions 0/682 dead transitions. [2024-06-14 13:10:42,132 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 446 places, 682 transitions, 12114 flow [2024-06-14 13:10:42,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:42,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:10:42,133 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:10:42,133 INFO L175 Difference]: Start difference. First operand has 439 places, 661 transitions, 10527 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:10:42,133 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 446 places, 682 transitions, 12114 flow [2024-06-14 13:10:45,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 682 transitions, 12027 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:10:45,530 INFO L231 Difference]: Finished difference. Result has 440 places, 665 transitions, 10768 flow [2024-06-14 13:10:45,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10768, PETRI_PLACES=440, PETRI_TRANSITIONS=665} [2024-06-14 13:10:45,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-14 13:10:45,531 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 665 transitions, 10768 flow [2024-06-14 13:10:45,532 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:45,532 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:45,532 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:45,532 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:10:45,532 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:45,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:45,532 INFO L85 PathProgramCache]: Analyzing trace with hash -1899851323, now seen corresponding path program 1 times [2024-06-14 13:10:45,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:45,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364132101] [2024-06-14 13:10:45,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:45,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:45,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:46,203 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:46,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:46,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364132101] [2024-06-14 13:10:46,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1364132101] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:46,205 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:46,205 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:46,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308990887] [2024-06-14 13:10:46,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:46,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:46,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:46,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:46,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:46,273 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:46,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 665 transitions, 10768 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:46,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:46,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:46,274 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:48,449 INFO L124 PetriNetUnfolderBase]: 5476/8295 cut-off events. [2024-06-14 13:10:48,450 INFO L125 PetriNetUnfolderBase]: For 1288215/1288219 co-relation queries the response was YES. [2024-06-14 13:10:48,557 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79706 conditions, 8295 events. 5476/8295 cut-off events. For 1288215/1288219 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 48364 event pairs, 951 based on Foata normal form. 6/8299 useless extension candidates. Maximal degree in co-relation 79496. Up to 7696 conditions per place. [2024-06-14 13:10:48,595 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 600 selfloop transitions, 112 changer transitions 0/715 dead transitions. [2024-06-14 13:10:48,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 715 transitions, 12908 flow [2024-06-14 13:10:48,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:10:48,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:10:48,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:10:48,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 13:10:48,596 INFO L175 Difference]: Start difference. First operand has 440 places, 665 transitions, 10768 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:10:48,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 715 transitions, 12908 flow [2024-06-14 13:10:51,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 442 places, 715 transitions, 12625 flow, removed 62 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:51,844 INFO L231 Difference]: Finished difference. Result has 444 places, 675 transitions, 11074 flow [2024-06-14 13:10:51,845 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10485, PETRI_DIFFERENCE_MINUEND_PLACES=434, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=665, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=553, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11074, PETRI_PLACES=444, PETRI_TRANSITIONS=675} [2024-06-14 13:10:51,845 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-14 13:10:51,845 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 675 transitions, 11074 flow [2024-06-14 13:10:51,845 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:51,845 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:51,845 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:51,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:10:51,845 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:51,846 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:51,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1678247819, now seen corresponding path program 1 times [2024-06-14 13:10:51,846 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:51,846 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199379707] [2024-06-14 13:10:51,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:51,846 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:51,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:52,551 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:52,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:52,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199379707] [2024-06-14 13:10:52,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199379707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:52,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:52,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:10:52,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388771244] [2024-06-14 13:10:52,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:52,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:10:52,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:52,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:10:52,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:10:52,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:52,617 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 675 transitions, 11074 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:52,617 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:52,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:52,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:10:54,730 INFO L124 PetriNetUnfolderBase]: 5533/8382 cut-off events. [2024-06-14 13:10:54,730 INFO L125 PetriNetUnfolderBase]: For 1353604/1353614 co-relation queries the response was YES. [2024-06-14 13:10:54,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81271 conditions, 8382 events. 5533/8382 cut-off events. For 1353604/1353614 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48965 event pairs, 965 based on Foata normal form. 14/8392 useless extension candidates. Maximal degree in co-relation 81059. Up to 7910 conditions per place. [2024-06-14 13:10:54,880 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 621 selfloop transitions, 93 changer transitions 0/717 dead transitions. [2024-06-14 13:10:54,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 451 places, 717 transitions, 13044 flow [2024-06-14 13:10:54,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:10:54,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:10:54,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:10:54,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:10:54,881 INFO L175 Difference]: Start difference. First operand has 444 places, 675 transitions, 11074 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:10:54,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 451 places, 717 transitions, 13044 flow [2024-06-14 13:10:58,964 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 717 transitions, 12731 flow, removed 58 selfloop flow, removed 6 redundant places. [2024-06-14 13:10:58,972 INFO L231 Difference]: Finished difference. Result has 449 places, 688 transitions, 11215 flow [2024-06-14 13:10:58,972 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10771, PETRI_DIFFERENCE_MINUEND_PLACES=438, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11215, PETRI_PLACES=449, PETRI_TRANSITIONS=688} [2024-06-14 13:10:58,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 407 predicate places. [2024-06-14 13:10:58,973 INFO L495 AbstractCegarLoop]: Abstraction has has 449 places, 688 transitions, 11215 flow [2024-06-14 13:10:58,973 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:58,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:10:58,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:10:58,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:10:58,973 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:10:58,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:10:58,974 INFO L85 PathProgramCache]: Analyzing trace with hash 446327163, now seen corresponding path program 2 times [2024-06-14 13:10:58,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:10:58,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378041416] [2024-06-14 13:10:58,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:10:58,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:10:58,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:10:59,745 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:10:59,745 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:10:59,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378041416] [2024-06-14 13:10:59,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378041416] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:10:59,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:10:59,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:10:59,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872227439] [2024-06-14 13:10:59,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:10:59,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:10:59,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:10:59,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:10:59,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:10:59,840 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:10:59,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 449 places, 688 transitions, 11215 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:10:59,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:10:59,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:10:59,841 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:02,180 INFO L124 PetriNetUnfolderBase]: 5527/8372 cut-off events. [2024-06-14 13:11:02,180 INFO L125 PetriNetUnfolderBase]: For 1351011/1351015 co-relation queries the response was YES. [2024-06-14 13:11:02,294 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81952 conditions, 8372 events. 5527/8372 cut-off events. For 1351011/1351015 co-relation queries the response was YES. Maximal size of possible extension queue 467. Compared 48916 event pairs, 939 based on Foata normal form. 6/8376 useless extension candidates. Maximal degree in co-relation 81736. Up to 7942 conditions per place. [2024-06-14 13:11:02,331 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 622 selfloop transitions, 98 changer transitions 0/723 dead transitions. [2024-06-14 13:11:02,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 457 places, 723 transitions, 12837 flow [2024-06-14 13:11:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:02,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:02,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:11:02,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 13:11:02,332 INFO L175 Difference]: Start difference. First operand has 449 places, 688 transitions, 11215 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:11:02,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 457 places, 723 transitions, 12837 flow [2024-06-14 13:11:06,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 723 transitions, 12717 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-06-14 13:11:06,141 INFO L231 Difference]: Finished difference. Result has 456 places, 688 transitions, 11313 flow [2024-06-14 13:11:06,141 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11111, PETRI_DIFFERENCE_MINUEND_PLACES=447, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=590, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11313, PETRI_PLACES=456, PETRI_TRANSITIONS=688} [2024-06-14 13:11:06,141 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:11:06,141 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 688 transitions, 11313 flow [2024-06-14 13:11:06,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:06,142 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:06,142 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:06,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:11:06,142 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:06,142 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:06,142 INFO L85 PathProgramCache]: Analyzing trace with hash 1245806955, now seen corresponding path program 2 times [2024-06-14 13:11:06,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:06,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702892551] [2024-06-14 13:11:06,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:06,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:06,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:06,797 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:06,797 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:06,797 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702892551] [2024-06-14 13:11:06,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702892551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:06,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:06,798 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:06,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142213554] [2024-06-14 13:11:06,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:06,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:06,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:06,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:11:06,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 688 transitions, 11313 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:06,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:06,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:11:06,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:09,122 INFO L124 PetriNetUnfolderBase]: 5547/8399 cut-off events. [2024-06-14 13:11:09,123 INFO L125 PetriNetUnfolderBase]: For 1391251/1391261 co-relation queries the response was YES. [2024-06-14 13:11:09,238 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81611 conditions, 8399 events. 5547/8399 cut-off events. For 1391251/1391261 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 48992 event pairs, 1066 based on Foata normal form. 14/8409 useless extension candidates. Maximal degree in co-relation 81393. Up to 8100 conditions per place. [2024-06-14 13:11:09,275 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 632 selfloop transitions, 81 changer transitions 0/716 dead transitions. [2024-06-14 13:11:09,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 463 places, 716 transitions, 12926 flow [2024-06-14 13:11:09,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:09,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:09,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:11:09,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 13:11:09,276 INFO L175 Difference]: Start difference. First operand has 456 places, 688 transitions, 11313 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:11:09,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 463 places, 716 transitions, 12926 flow [2024-06-14 13:11:14,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 455 places, 716 transitions, 12664 flow, removed 31 selfloop flow, removed 8 redundant places. [2024-06-14 13:11:14,268 INFO L231 Difference]: Finished difference. Result has 456 places, 694 transitions, 11306 flow [2024-06-14 13:11:14,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11053, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=75, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11306, PETRI_PLACES=456, PETRI_TRANSITIONS=694} [2024-06-14 13:11:14,268 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 414 predicate places. [2024-06-14 13:11:14,268 INFO L495 AbstractCegarLoop]: Abstraction has has 456 places, 694 transitions, 11306 flow [2024-06-14 13:11:14,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:14,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:14,269 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:14,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:11:14,269 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:14,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:14,269 INFO L85 PathProgramCache]: Analyzing trace with hash 623458683, now seen corresponding path program 3 times [2024-06-14 13:11:14,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:14,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678427185] [2024-06-14 13:11:14,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:14,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:14,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:14,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:14,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:14,994 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678427185] [2024-06-14 13:11:14,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678427185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:14,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:14,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:14,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865289896] [2024-06-14 13:11:14,994 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:14,994 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:14,994 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:14,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:14,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:15,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:11:15,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 456 places, 694 transitions, 11306 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:15,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:15,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:11:15,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:17,387 INFO L124 PetriNetUnfolderBase]: 5567/8425 cut-off events. [2024-06-14 13:11:17,388 INFO L125 PetriNetUnfolderBase]: For 1400729/1400733 co-relation queries the response was YES. [2024-06-14 13:11:17,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81902 conditions, 8425 events. 5567/8425 cut-off events. For 1400729/1400733 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 49174 event pairs, 1029 based on Foata normal form. 6/8429 useless extension candidates. Maximal degree in co-relation 81684. Up to 8128 conditions per place. [2024-06-14 13:11:17,537 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 639 selfloop transitions, 88 changer transitions 0/730 dead transitions. [2024-06-14 13:11:17,537 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 464 places, 730 transitions, 13038 flow [2024-06-14 13:11:17,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:17,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:17,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:11:17,538 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 13:11:17,538 INFO L175 Difference]: Start difference. First operand has 456 places, 694 transitions, 11306 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:11:17,538 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 464 places, 730 transitions, 13038 flow [2024-06-14 13:11:21,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 460 places, 730 transitions, 12864 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:11:21,694 INFO L231 Difference]: Finished difference. Result has 462 places, 700 transitions, 11470 flow [2024-06-14 13:11:21,694 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11132, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=694, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11470, PETRI_PLACES=462, PETRI_TRANSITIONS=700} [2024-06-14 13:11:21,694 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 13:11:21,695 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 700 transitions, 11470 flow [2024-06-14 13:11:21,695 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:21,695 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:21,695 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:21,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:11:21,695 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:21,696 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:21,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1501116299, now seen corresponding path program 3 times [2024-06-14 13:11:21,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:21,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964410994] [2024-06-14 13:11:21,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:21,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:21,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:22,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:22,360 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:22,360 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964410994] [2024-06-14 13:11:22,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964410994] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:22,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:22,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:22,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74714476] [2024-06-14 13:11:22,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:22,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:22,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:22,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:22,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:22,439 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:11:22,440 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 700 transitions, 11470 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:22,440 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:22,440 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:11:22,440 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:24,992 INFO L124 PetriNetUnfolderBase]: 5587/8456 cut-off events. [2024-06-14 13:11:24,993 INFO L125 PetriNetUnfolderBase]: For 1438754/1438764 co-relation queries the response was YES. [2024-06-14 13:11:25,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82385 conditions, 8456 events. 5587/8456 cut-off events. For 1438754/1438764 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 49354 event pairs, 1037 based on Foata normal form. 14/8465 useless extension candidates. Maximal degree in co-relation 82165. Up to 8134 conditions per place. [2024-06-14 13:11:25,153 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 638 selfloop transitions, 86 changer transitions 0/727 dead transitions. [2024-06-14 13:11:25,154 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 727 transitions, 13101 flow [2024-06-14 13:11:25,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:25,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:25,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:11:25,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 13:11:25,157 INFO L175 Difference]: Start difference. First operand has 462 places, 700 transitions, 11470 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:11:25,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 727 transitions, 13101 flow [2024-06-14 13:11:30,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 727 transitions, 12866 flow, removed 35 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:30,115 INFO L231 Difference]: Finished difference. Result has 464 places, 703 transitions, 11480 flow [2024-06-14 13:11:30,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11235, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=614, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11480, PETRI_PLACES=464, PETRI_TRANSITIONS=703} [2024-06-14 13:11:30,115 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 422 predicate places. [2024-06-14 13:11:30,116 INFO L495 AbstractCegarLoop]: Abstraction has has 464 places, 703 transitions, 11480 flow [2024-06-14 13:11:30,116 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:30,116 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:30,116 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:30,116 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:11:30,116 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:30,116 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:30,116 INFO L85 PathProgramCache]: Analyzing trace with hash -274733833, now seen corresponding path program 4 times [2024-06-14 13:11:30,117 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:30,117 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738809371] [2024-06-14 13:11:30,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:30,117 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:30,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:30,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738809371] [2024-06-14 13:11:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738809371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1424526949] [2024-06-14 13:11:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:30,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:30,896 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:11:30,897 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 464 places, 703 transitions, 11480 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:30,897 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:30,897 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:11:30,897 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:33,370 INFO L124 PetriNetUnfolderBase]: 5981/8993 cut-off events. [2024-06-14 13:11:33,370 INFO L125 PetriNetUnfolderBase]: For 1779115/1779115 co-relation queries the response was YES. [2024-06-14 13:11:33,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94611 conditions, 8993 events. 5981/8993 cut-off events. For 1779115/1779115 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 52426 event pairs, 991 based on Foata normal form. 2/8993 useless extension candidates. Maximal degree in co-relation 94390. Up to 7530 conditions per place. [2024-06-14 13:11:33,538 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 588 selfloop transitions, 204 changer transitions 0/795 dead transitions. [2024-06-14 13:11:33,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 795 transitions, 15487 flow [2024-06-14 13:11:33,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:33,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:33,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:11:33,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-14 13:11:33,539 INFO L175 Difference]: Start difference. First operand has 464 places, 703 transitions, 11480 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:11:33,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 795 transitions, 15487 flow [2024-06-14 13:11:39,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 466 places, 795 transitions, 15291 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:11:39,019 INFO L231 Difference]: Finished difference. Result has 470 places, 753 transitions, 13377 flow [2024-06-14 13:11:39,019 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11284, PETRI_DIFFERENCE_MINUEND_PLACES=458, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=161, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=516, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13377, PETRI_PLACES=470, PETRI_TRANSITIONS=753} [2024-06-14 13:11:39,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 428 predicate places. [2024-06-14 13:11:39,020 INFO L495 AbstractCegarLoop]: Abstraction has has 470 places, 753 transitions, 13377 flow [2024-06-14 13:11:39,020 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:39,020 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:39,020 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:39,020 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:11:39,020 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:39,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:39,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1895778451, now seen corresponding path program 4 times [2024-06-14 13:11:39,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:39,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159630085] [2024-06-14 13:11:39,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:39,021 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:39,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:39,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:39,751 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:39,751 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159630085] [2024-06-14 13:11:39,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159630085] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:39,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:39,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:11:39,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370876259] [2024-06-14 13:11:39,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:39,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:11:39,751 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:39,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:11:39,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:11:39,796 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:11:39,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 470 places, 753 transitions, 13377 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:39,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:39,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:11:39,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:42,394 INFO L124 PetriNetUnfolderBase]: 6061/9108 cut-off events. [2024-06-14 13:11:42,395 INFO L125 PetriNetUnfolderBase]: For 1871039/1871041 co-relation queries the response was YES. [2024-06-14 13:11:42,529 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98602 conditions, 9108 events. 6061/9108 cut-off events. For 1871039/1871041 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 53209 event pairs, 923 based on Foata normal form. 6/9108 useless extension candidates. Maximal degree in co-relation 98377. Up to 8124 conditions per place. [2024-06-14 13:11:42,576 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 622 selfloop transitions, 170 changer transitions 0/795 dead transitions. [2024-06-14 13:11:42,576 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 477 places, 795 transitions, 15793 flow [2024-06-14 13:11:42,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:11:42,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:11:42,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:11:42,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 13:11:42,577 INFO L175 Difference]: Start difference. First operand has 470 places, 753 transitions, 13377 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:11:42,577 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 477 places, 795 transitions, 15793 flow [2024-06-14 13:11:49,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 474 places, 795 transitions, 15458 flow, removed 129 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:49,537 INFO L231 Difference]: Finished difference. Result has 476 places, 768 transitions, 13639 flow [2024-06-14 13:11:49,537 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13042, PETRI_DIFFERENCE_MINUEND_PLACES=467, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=753, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=596, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=13639, PETRI_PLACES=476, PETRI_TRANSITIONS=768} [2024-06-14 13:11:49,538 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 434 predicate places. [2024-06-14 13:11:49,538 INFO L495 AbstractCegarLoop]: Abstraction has has 476 places, 768 transitions, 13639 flow [2024-06-14 13:11:49,538 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:49,538 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:49,538 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:49,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:11:49,538 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:49,539 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:49,539 INFO L85 PathProgramCache]: Analyzing trace with hash -274613863, now seen corresponding path program 5 times [2024-06-14 13:11:49,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:49,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965653692] [2024-06-14 13:11:49,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:49,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:49,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:11:50,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:11:50,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:11:50,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965653692] [2024-06-14 13:11:50,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965653692] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:11:50,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:11:50,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:11:50,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563757918] [2024-06-14 13:11:50,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:11:50,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:11:50,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:11:50,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:11:50,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:11:50,572 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:11:50,572 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 476 places, 768 transitions, 13639 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:50,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:11:50,573 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:11:50,573 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:11:53,246 INFO L124 PetriNetUnfolderBase]: 6071/9118 cut-off events. [2024-06-14 13:11:53,246 INFO L125 PetriNetUnfolderBase]: For 1879946/1879946 co-relation queries the response was YES. [2024-06-14 13:11:53,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99060 conditions, 9118 events. 6071/9118 cut-off events. For 1879946/1879946 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 53178 event pairs, 973 based on Foata normal form. 2/9118 useless extension candidates. Maximal degree in co-relation 98832. Up to 8520 conditions per place. [2024-06-14 13:11:53,425 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 676 selfloop transitions, 125 changer transitions 0/804 dead transitions. [2024-06-14 13:11:53,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 484 places, 804 transitions, 15714 flow [2024-06-14 13:11:53,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:11:53,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:11:53,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:11:53,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 13:11:53,426 INFO L175 Difference]: Start difference. First operand has 476 places, 768 transitions, 13639 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:11:53,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 484 places, 804 transitions, 15714 flow [2024-06-14 13:11:59,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 804 transitions, 15494 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:11:59,769 INFO L231 Difference]: Finished difference. Result has 482 places, 771 transitions, 13768 flow [2024-06-14 13:11:59,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13419, PETRI_DIFFERENCE_MINUEND_PLACES=473, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=768, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=122, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=643, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13768, PETRI_PLACES=482, PETRI_TRANSITIONS=771} [2024-06-14 13:11:59,769 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-14 13:11:59,769 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 771 transitions, 13768 flow [2024-06-14 13:11:59,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:11:59,770 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:11:59,770 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:11:59,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:11:59,770 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:11:59,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:11:59,770 INFO L85 PathProgramCache]: Analyzing trace with hash -655042538, now seen corresponding path program 1 times [2024-06-14 13:11:59,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:11:59,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573150114] [2024-06-14 13:11:59,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:11:59,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:11:59,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:00,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:00,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:00,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573150114] [2024-06-14 13:12:00,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573150114] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:00,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:00,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:00,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375586970] [2024-06-14 13:12:00,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:00,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:00,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:00,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:00,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:00,882 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:12:00,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 771 transitions, 13768 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:00,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:00,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:12:00,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:03,759 INFO L124 PetriNetUnfolderBase]: 6068/9114 cut-off events. [2024-06-14 13:12:03,760 INFO L125 PetriNetUnfolderBase]: For 1903585/1903589 co-relation queries the response was YES. [2024-06-14 13:12:03,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98922 conditions, 9114 events. 6068/9114 cut-off events. For 1903585/1903589 co-relation queries the response was YES. Maximal size of possible extension queue 512. Compared 53157 event pairs, 1221 based on Foata normal form. 5/9117 useless extension candidates. Maximal degree in co-relation 98693. Up to 8944 conditions per place. [2024-06-14 13:12:03,952 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 733 selfloop transitions, 68 changer transitions 0/804 dead transitions. [2024-06-14 13:12:03,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 804 transitions, 15822 flow [2024-06-14 13:12:03,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:03,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:03,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:12:03,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:12:03,954 INFO L175 Difference]: Start difference. First operand has 482 places, 771 transitions, 13768 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:12:03,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 804 transitions, 15822 flow [2024-06-14 13:12:10,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 485 places, 804 transitions, 15583 flow, removed 31 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:10,235 INFO L231 Difference]: Finished difference. Result has 487 places, 775 transitions, 13795 flow [2024-06-14 13:12:10,236 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13529, PETRI_DIFFERENCE_MINUEND_PLACES=477, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=771, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=703, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=13795, PETRI_PLACES=487, PETRI_TRANSITIONS=775} [2024-06-14 13:12:10,236 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 445 predicate places. [2024-06-14 13:12:10,236 INFO L495 AbstractCegarLoop]: Abstraction has has 487 places, 775 transitions, 13795 flow [2024-06-14 13:12:10,236 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:10,236 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:10,236 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:10,237 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:12:10,237 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:10,237 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:10,237 INFO L85 PathProgramCache]: Analyzing trace with hash 1901020675, now seen corresponding path program 6 times [2024-06-14 13:12:10,237 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:10,237 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611443000] [2024-06-14 13:12:10,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:10,237 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:10,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:11,184 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:11,184 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:11,184 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611443000] [2024-06-14 13:12:11,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611443000] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:11,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:11,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:11,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871088110] [2024-06-14 13:12:11,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:11,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:11,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:11,184 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:11,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:11,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:12:11,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 487 places, 775 transitions, 13795 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:11,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:11,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:12:11,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:14,154 INFO L124 PetriNetUnfolderBase]: 6088/9142 cut-off events. [2024-06-14 13:12:14,155 INFO L125 PetriNetUnfolderBase]: For 1951074/1951074 co-relation queries the response was YES. [2024-06-14 13:12:14,280 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99243 conditions, 9142 events. 6088/9142 cut-off events. For 1951074/1951074 co-relation queries the response was YES. Maximal size of possible extension queue 515. Compared 53390 event pairs, 938 based on Foata normal form. 4/9144 useless extension candidates. Maximal degree in co-relation 99012. Up to 7653 conditions per place. [2024-06-14 13:12:14,321 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 597 selfloop transitions, 223 changer transitions 0/823 dead transitions. [2024-06-14 13:12:14,322 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 495 places, 823 transitions, 16631 flow [2024-06-14 13:12:14,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:14,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:14,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-14 13:12:14,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45528455284552843 [2024-06-14 13:12:14,323 INFO L175 Difference]: Start difference. First operand has 487 places, 775 transitions, 13795 flow. Second operand 9 states and 168 transitions. [2024-06-14 13:12:14,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 495 places, 823 transitions, 16631 flow [2024-06-14 13:12:20,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 823 transitions, 16471 flow, removed 23 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:20,184 INFO L231 Difference]: Finished difference. Result has 490 places, 781 transitions, 14249 flow [2024-06-14 13:12:20,184 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13635, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=775, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=558, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14249, PETRI_PLACES=490, PETRI_TRANSITIONS=781} [2024-06-14 13:12:20,185 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-14 13:12:20,185 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 781 transitions, 14249 flow [2024-06-14 13:12:20,185 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:20,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:20,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:20,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:12:20,185 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:20,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:20,186 INFO L85 PathProgramCache]: Analyzing trace with hash -654952545, now seen corresponding path program 7 times [2024-06-14 13:12:20,186 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:20,186 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153411495] [2024-06-14 13:12:20,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:20,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:20,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:20,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:20,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:20,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153411495] [2024-06-14 13:12:20,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153411495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:20,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:20,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:20,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599417701] [2024-06-14 13:12:20,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:20,953 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:20,953 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:20,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:20,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:21,032 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:12:21,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 781 transitions, 14249 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:21,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:21,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:12:21,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:24,374 INFO L124 PetriNetUnfolderBase]: 6112/9176 cut-off events. [2024-06-14 13:12:24,375 INFO L125 PetriNetUnfolderBase]: For 1986418/1986418 co-relation queries the response was YES. [2024-06-14 13:12:24,493 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100786 conditions, 9176 events. 6112/9176 cut-off events. For 1986418/1986418 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 53580 event pairs, 936 based on Foata normal form. 4/9178 useless extension candidates. Maximal degree in co-relation 100554. Up to 7680 conditions per place. [2024-06-14 13:12:24,533 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 587 selfloop transitions, 235 changer transitions 0/825 dead transitions. [2024-06-14 13:12:24,533 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 825 transitions, 17093 flow [2024-06-14 13:12:24,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:24,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:24,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-14 13:12:24,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44173441734417346 [2024-06-14 13:12:24,534 INFO L175 Difference]: Start difference. First operand has 490 places, 781 transitions, 14249 flow. Second operand 9 states and 163 transitions. [2024-06-14 13:12:24,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 825 transitions, 17093 flow [2024-06-14 13:12:30,942 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 825 transitions, 16591 flow, removed 69 selfloop flow, removed 6 redundant places. [2024-06-14 13:12:30,953 INFO L231 Difference]: Finished difference. Result has 493 places, 787 transitions, 14406 flow [2024-06-14 13:12:30,953 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13766, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=781, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=229, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=552, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=14406, PETRI_PLACES=493, PETRI_TRANSITIONS=787} [2024-06-14 13:12:30,954 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 451 predicate places. [2024-06-14 13:12:30,954 INFO L495 AbstractCegarLoop]: Abstraction has has 493 places, 787 transitions, 14406 flow [2024-06-14 13:12:30,954 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:30,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:30,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:30,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:12:30,954 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:30,955 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:30,955 INFO L85 PathProgramCache]: Analyzing trace with hash -1735915036, now seen corresponding path program 2 times [2024-06-14 13:12:30,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:30,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150882833] [2024-06-14 13:12:30,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:30,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:30,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:31,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:31,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:31,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150882833] [2024-06-14 13:12:31,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150882833] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:31,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:31,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:31,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269470164] [2024-06-14 13:12:31,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:31,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:31,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:31,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:31,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:32,020 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:12:32,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 493 places, 787 transitions, 14406 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:32,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:32,021 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:12:32,021 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:35,632 INFO L124 PetriNetUnfolderBase]: 6511/9737 cut-off events. [2024-06-14 13:12:35,632 INFO L125 PetriNetUnfolderBase]: For 2125079/2125079 co-relation queries the response was YES. [2024-06-14 13:12:35,781 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108723 conditions, 9737 events. 6511/9737 cut-off events. For 2125079/2125079 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 56945 event pairs, 1011 based on Foata normal form. 3/9735 useless extension candidates. Maximal degree in co-relation 108490. Up to 8815 conditions per place. [2024-06-14 13:12:35,826 INFO L140 encePairwiseOnDemand]: 27/41 looper letters, 730 selfloop transitions, 209 changer transitions 0/942 dead transitions. [2024-06-14 13:12:35,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 942 transitions, 19994 flow [2024-06-14 13:12:35,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:12:35,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:12:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-14 13:12:35,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:12:35,828 INFO L175 Difference]: Start difference. First operand has 493 places, 787 transitions, 14406 flow. Second operand 10 states and 170 transitions. [2024-06-14 13:12:35,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 942 transitions, 19994 flow [2024-06-14 13:12:42,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 942 transitions, 19346 flow, removed 113 selfloop flow, removed 5 redundant places. [2024-06-14 13:12:42,422 INFO L231 Difference]: Finished difference. Result has 502 places, 895 transitions, 17189 flow [2024-06-14 13:12:42,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=13964, PETRI_DIFFERENCE_MINUEND_PLACES=488, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=787, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=585, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=17189, PETRI_PLACES=502, PETRI_TRANSITIONS=895} [2024-06-14 13:12:42,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 460 predicate places. [2024-06-14 13:12:42,423 INFO L495 AbstractCegarLoop]: Abstraction has has 502 places, 895 transitions, 17189 flow [2024-06-14 13:12:42,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:42,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:42,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:42,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:12:42,423 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:42,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:42,424 INFO L85 PathProgramCache]: Analyzing trace with hash 1905044041, now seen corresponding path program 5 times [2024-06-14 13:12:42,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:42,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981248676] [2024-06-14 13:12:42,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:42,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:42,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:43,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:43,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:43,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981248676] [2024-06-14 13:12:43,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981248676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:43,105 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:43,105 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:12:43,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [203702146] [2024-06-14 13:12:43,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:43,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:12:43,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:43,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:12:43,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:12:43,163 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:12:43,163 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 502 places, 895 transitions, 17189 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:43,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:43,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:12:43,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:46,893 INFO L124 PetriNetUnfolderBase]: 6531/9768 cut-off events. [2024-06-14 13:12:46,893 INFO L125 PetriNetUnfolderBase]: For 2162974/2162976 co-relation queries the response was YES. [2024-06-14 13:12:47,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109760 conditions, 9768 events. 6531/9768 cut-off events. For 2162974/2162976 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 57173 event pairs, 920 based on Foata normal form. 6/9769 useless extension candidates. Maximal degree in co-relation 109522. Up to 8650 conditions per place. [2024-06-14 13:12:47,108 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 706 selfloop transitions, 219 changer transitions 0/928 dead transitions. [2024-06-14 13:12:47,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 928 transitions, 19767 flow [2024-06-14 13:12:47,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:12:47,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:12:47,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:12:47,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:12:47,110 INFO L175 Difference]: Start difference. First operand has 502 places, 895 transitions, 17189 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:12:47,110 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 928 transitions, 19767 flow [2024-06-14 13:12:54,372 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 506 places, 928 transitions, 19491 flow, removed 59 selfloop flow, removed 3 redundant places. [2024-06-14 13:12:54,383 INFO L231 Difference]: Finished difference. Result has 508 places, 903 transitions, 17539 flow [2024-06-14 13:12:54,384 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=16915, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=895, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=17539, PETRI_PLACES=508, PETRI_TRANSITIONS=903} [2024-06-14 13:12:54,384 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 466 predicate places. [2024-06-14 13:12:54,384 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 903 transitions, 17539 flow [2024-06-14 13:12:54,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:54,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:12:54,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:12:54,385 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:12:54,385 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:12:54,385 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:12:54,385 INFO L85 PathProgramCache]: Analyzing trace with hash 664227414, now seen corresponding path program 3 times [2024-06-14 13:12:54,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:12:54,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620108916] [2024-06-14 13:12:54,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:12:54,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:12:54,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:12:55,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:12:55,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:12:55,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620108916] [2024-06-14 13:12:55,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620108916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:12:55,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:12:55,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:12:55,303 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028362186] [2024-06-14 13:12:55,303 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:12:55,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:12:55,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:12:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:12:55,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:12:55,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:12:55,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 903 transitions, 17539 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:12:55,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:12:55,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:12:55,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:12:59,014 INFO L124 PetriNetUnfolderBase]: 6526/9759 cut-off events. [2024-06-14 13:12:59,014 INFO L125 PetriNetUnfolderBase]: For 2171630/2171630 co-relation queries the response was YES. [2024-06-14 13:12:59,311 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109890 conditions, 9759 events. 6526/9759 cut-off events. For 2171630/2171630 co-relation queries the response was YES. Maximal size of possible extension queue 562. Compared 57130 event pairs, 976 based on Foata normal form. 3/9760 useless extension candidates. Maximal degree in co-relation 109650. Up to 8936 conditions per place. [2024-06-14 13:12:59,367 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 716 selfloop transitions, 217 changer transitions 0/936 dead transitions. [2024-06-14 13:12:59,367 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 936 transitions, 20164 flow [2024-06-14 13:12:59,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:12:59,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:12:59,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:12:59,368 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 13:12:59,368 INFO L175 Difference]: Start difference. First operand has 508 places, 903 transitions, 17539 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:12:59,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 936 transitions, 20164 flow [2024-06-14 13:13:06,924 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 936 transitions, 19718 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-06-14 13:13:06,937 INFO L231 Difference]: Finished difference. Result has 513 places, 906 transitions, 17730 flow [2024-06-14 13:13:06,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17093, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=903, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=686, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17730, PETRI_PLACES=513, PETRI_TRANSITIONS=906} [2024-06-14 13:13:06,937 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-14 13:13:06,937 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 906 transitions, 17730 flow [2024-06-14 13:13:06,938 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:06,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:06,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:06,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:13:06,938 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:06,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:06,938 INFO L85 PathProgramCache]: Analyzing trace with hash -1540034601, now seen corresponding path program 8 times [2024-06-14 13:13:06,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:06,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500886393] [2024-06-14 13:13:06,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:06,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:06,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:07,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:07,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:07,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500886393] [2024-06-14 13:13:07,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [500886393] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:07,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:07,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:07,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [635412186] [2024-06-14 13:13:07,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:07,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:07,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:07,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:07,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:07,804 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:13:07,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 906 transitions, 17730 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:07,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:07,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:13:07,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:11,669 INFO L124 PetriNetUnfolderBase]: 6524/9757 cut-off events. [2024-06-14 13:13:11,669 INFO L125 PetriNetUnfolderBase]: For 2196144/2196144 co-relation queries the response was YES. [2024-06-14 13:13:11,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109522 conditions, 9757 events. 6524/9757 cut-off events. For 2196144/2196144 co-relation queries the response was YES. Maximal size of possible extension queue 563. Compared 57057 event pairs, 980 based on Foata normal form. 6/9761 useless extension candidates. Maximal degree in co-relation 109280. Up to 8938 conditions per place. [2024-06-14 13:13:11,870 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 725 selfloop transitions, 211 changer transitions 0/939 dead transitions. [2024-06-14 13:13:11,870 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 521 places, 939 transitions, 20296 flow [2024-06-14 13:13:11,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:13:11,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:13:11,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:13:11,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:13:11,872 INFO L175 Difference]: Start difference. First operand has 513 places, 906 transitions, 17730 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:13:11,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 521 places, 939 transitions, 20296 flow [2024-06-14 13:13:18,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 939 transitions, 19935 flow, removed 65 selfloop flow, removed 4 redundant places. [2024-06-14 13:13:18,414 INFO L231 Difference]: Finished difference. Result has 518 places, 909 transitions, 17874 flow [2024-06-14 13:13:18,414 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17369, PETRI_DIFFERENCE_MINUEND_PLACES=509, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=906, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=208, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=17874, PETRI_PLACES=518, PETRI_TRANSITIONS=909} [2024-06-14 13:13:18,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 476 predicate places. [2024-06-14 13:13:18,415 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 909 transitions, 17874 flow [2024-06-14 13:13:18,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:18,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:18,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:18,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:13:18,415 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:18,415 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:18,415 INFO L85 PathProgramCache]: Analyzing trace with hash -1540040181, now seen corresponding path program 9 times [2024-06-14 13:13:18,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:18,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [435070465] [2024-06-14 13:13:18,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:18,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:18,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:19,181 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:19,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:19,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [435070465] [2024-06-14 13:13:19,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [435070465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:19,182 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:19,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:13:19,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418850722] [2024-06-14 13:13:19,182 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:19,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:13:19,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:19,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:13:19,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:13:19,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:13:19,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 909 transitions, 17874 flow. Second operand has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:19,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:19,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:13:19,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:13:22,823 INFO L124 PetriNetUnfolderBase]: 6510/9738 cut-off events. [2024-06-14 13:13:22,823 INFO L125 PetriNetUnfolderBase]: For 2183155/2183155 co-relation queries the response was YES. [2024-06-14 13:13:22,973 INFO L83 FinitePrefix]: Finished finitePrefix Result has 109066 conditions, 9738 events. 6510/9738 cut-off events. For 2183155/2183155 co-relation queries the response was YES. Maximal size of possible extension queue 564. Compared 56960 event pairs, 972 based on Foata normal form. 4/9740 useless extension candidates. Maximal degree in co-relation 108823. Up to 8930 conditions per place. [2024-06-14 13:13:23,188 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 726 selfloop transitions, 214 changer transitions 0/943 dead transitions. [2024-06-14 13:13:23,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 528 places, 943 transitions, 20404 flow [2024-06-14 13:13:23,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:13:23,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:13:23,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 179 transitions. [2024-06-14 13:13:23,190 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3968957871396896 [2024-06-14 13:13:23,190 INFO L175 Difference]: Start difference. First operand has 518 places, 909 transitions, 17874 flow. Second operand 11 states and 179 transitions. [2024-06-14 13:13:23,190 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 528 places, 943 transitions, 20404 flow [2024-06-14 13:13:31,428 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 522 places, 943 transitions, 19876 flow, removed 77 selfloop flow, removed 6 redundant places. [2024-06-14 13:13:31,441 INFO L231 Difference]: Finished difference. Result has 523 places, 909 transitions, 17784 flow [2024-06-14 13:13:31,441 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=17346, PETRI_DIFFERENCE_MINUEND_PLACES=512, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=909, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=214, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=695, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=17784, PETRI_PLACES=523, PETRI_TRANSITIONS=909} [2024-06-14 13:13:31,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-14 13:13:31,442 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 909 transitions, 17784 flow [2024-06-14 13:13:31,442 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 8.7) internal successors, (87), 10 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:31,442 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:13:31,442 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:13:31,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:13:31,442 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:13:31,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:13:31,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1905032881, now seen corresponding path program 6 times [2024-06-14 13:13:31,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:13:31,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101842549] [2024-06-14 13:13:31,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:13:31,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:13:31,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:13:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:13:32,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:13:32,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101842549] [2024-06-14 13:13:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [101842549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:13:32,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:13:32,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:13:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249969392] [2024-06-14 13:13:32,178 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:13:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:13:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:13:32,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:13:32,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:13:32,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:13:32,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 909 transitions, 17784 flow. Second operand has 9 states, 9 states have (on average 8.88888888888889) internal successors, (80), 9 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:13:32,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:13:32,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:13:32,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand