./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe021_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/safe021_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/safe021_power.opt_pso.opt.i ./goblint.2024-05-21_14-57-05.files/protection/safe021_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 13:26:22,888 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:26:22,959 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:26:22,964 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:26:22,964 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:26:22,999 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:26:22,999 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:26:23,000 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:26:23,001 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:26:23,005 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:26:23,005 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:26:23,005 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:26:23,006 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:26:23,007 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:26:23,007 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:26:23,007 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:26:23,008 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:26:23,008 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:26:23,008 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:26:23,008 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:26:23,008 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:26:23,009 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:26:23,009 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:26:23,009 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:26:23,010 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:26:23,010 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:26:23,010 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:26:23,010 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:26:23,011 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:26:23,011 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:26:23,012 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:26:23,012 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:26:23,012 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:26:23,012 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:26:23,013 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:26:23,013 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:26:23,013 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:26:23,013 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:26:23,013 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:26:23,013 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:26:23,013 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:26:23,014 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:26:23,014 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:26:23,014 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:26:23,272 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:26:23,297 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:26:23,299 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:26:23,300 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:26:23,300 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:26:23,301 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-14 13:26:24,479 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:26:24,781 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:26:24,782 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe021_power.opt_pso.opt.i [2024-06-14 13:26:24,798 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6ff9d9b/af251cf0c0e2485d9218896c28001d18/FLAG35a3d09be [2024-06-14 13:26:24,814 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/fc6ff9d9b/af251cf0c0e2485d9218896c28001d18 [2024-06-14 13:26:24,816 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:26:24,817 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:26:24,820 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/safe021_power.opt_pso.opt.yml/witness.yml [2024-06-14 13:26:25,004 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:26:25,005 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:26:25,008 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:26:25,008 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:26:25,013 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:26:25,014 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:26:24" (1/2) ... [2024-06-14 13:26:25,015 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3431ad4f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:26:25, skipping insertion in model container [2024-06-14 13:26:25,015 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:26:24" (1/2) ... [2024-06-14 13:26:25,016 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@35096d34 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:26:25, skipping insertion in model container [2024-06-14 13:26:25,017 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:26:25" (2/2) ... [2024-06-14 13:26:25,017 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3431ad4f and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:25, skipping insertion in model container [2024-06-14 13:26:25,018 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:26:25" (2/2) ... [2024-06-14 13:26:25,018 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:26:25,106 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:26:25,107 INFO L97 edCorrectnessWitness]: Location invariant before [L826-L826] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)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$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 13:26:25,108 INFO L97 edCorrectnessWitness]: Location invariant before [L823-L823] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! 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 || ((((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$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)0)) && (! multithreaded || x$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$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 13:26:25,108 INFO L97 edCorrectnessWitness]: Location invariant before [L825-L825] (((((((((((((((((! multithreaded || x$r_buff1_thd0 == (_Bool)0) && (! multithreaded || 0 <= __unbuffered_cnt)) && (! multithreaded || ((((0 <= x$w_buff0 && x$w_buff0 <= 2) && x$w_buff0 <= 127) && x$w_buff0 % 2 == 0) && (x$w_buff0 == 0 || x$w_buff0 == 2)))) && (! multithreaded || ((((0 <= x$w_buff1 && x$w_buff1 <= 2) && x$w_buff1 <= 127) && x$w_buff1 % 2 == 0) && (x$w_buff1 == 0 || x$w_buff1 == 2)))) && (! multithreaded || ((0 <= y && y <= 1) && (y == 0 || y == 1)))) && (! multithreaded || x$read_delayed_var == 0)) && (! multithreaded || x$r_buff0_thd3 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff0_thd1 == (_Bool)0)) && (! multithreaded || x$r_buff1_thd3 == (_Bool)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$mem_tmp == 2)))) && (! multithreaded || x$read_delayed == (_Bool)0)) && (! multithreaded || x$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-14 13:26:25,127 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:26:25,127 INFO L106 edCorrectnessWitness]: ghost_update [L821-L821] multithreaded = 1; [2024-06-14 13:26:25,187 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:26:25,551 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:26:25,561 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:26:25,703 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:26:25,758 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:26:25,761 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:26:25 WrapperNode [2024-06-14 13:26:25,762 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:26:25,763 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:26:25,764 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:26:25,764 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:26:25,771 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,799 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,853 INFO L138 Inliner]: procedures = 175, calls = 43, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-14 13:26:25,856 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:26:25,857 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:26:25,857 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:26:25,857 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:26:25,874 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,874 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,887 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,933 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 13:26:25,934 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,934 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,947 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,967 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,969 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,982 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 01:26:25" (1/1) ... [2024-06-14 13:26:25,990 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:26:25,991 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:26:25,996 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:26:25,997 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:26:25,998 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 01:26:25" (1/1) ... [2024-06-14 13:26:26,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:26:26,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:26:26,076 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 13:26:26,102 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 13:26:26,117 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:26:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:26:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:26:26,118 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:26:26,118 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:26:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:26:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:26:26,119 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:26:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:26:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:26:26,119 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:26:26,120 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:26:26,121 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 13:26:26,258 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:26:26,260 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:26:26,648 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:26:26,649 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:26:26,821 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:26:26,822 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:26:26,822 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:26:26 BoogieIcfgContainer [2024-06-14 13:26:26,822 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:26:26,825 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:26:26,826 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:26:26,829 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:26:26,829 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:26:24" (1/4) ... [2024-06-14 13:26:26,829 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a328e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:26:26, skipping insertion in model container [2024-06-14 13:26:26,830 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:26:25" (2/4) ... [2024-06-14 13:26:26,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a328e4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:26:26, skipping insertion in model container [2024-06-14 13:26:26,831 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 01:26:25" (3/4) ... [2024-06-14 13:26:26,831 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@79a328e4 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:26:26, skipping insertion in model container [2024-06-14 13:26:26,831 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:26:26" (4/4) ... [2024-06-14 13:26:26,833 INFO L112 eAbstractionObserver]: Analyzing ICFG safe021_power.opt_pso.opt.i [2024-06-14 13:26:26,851 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:26:26,851 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:26:26,851 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:26:26,932 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:26:26,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:26:27,006 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:26:27,007 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:26:27,010 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 64 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 13:26:27,010 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:26:27,014 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:26:27,028 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:26:27,034 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;@38e7aa70, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:26:27,035 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:26:27,048 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:26:27,049 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:26:27,049 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:26:27,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:27,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:26:27,051 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 13:26:27,056 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:27,057 INFO L85 PathProgramCache]: Analyzing trace with hash -1322398027, now seen corresponding path program 1 times [2024-06-14 13:26:27,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:27,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85617264] [2024-06-14 13:26:27,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:27,069 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:27,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:28,322 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:28,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:28,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85617264] [2024-06-14 13:26:28,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85617264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:28,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:28,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:26:28,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090145410] [2024-06-14 13:26:28,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:28,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:26:28,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:28,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:26:28,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:26:28,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 41 [2024-06-14 13:26:28,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:28,410 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:28,410 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 41 [2024-06-14 13:26:28,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:28,855 INFO L124 PetriNetUnfolderBase]: 1152/1756 cut-off events. [2024-06-14 13:26:28,856 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-14 13:26:28,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3598 conditions, 1756 events. 1152/1756 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 8215 event pairs, 693 based on Foata normal form. 2/1710 useless extension candidates. Maximal degree in co-relation 3583. Up to 1738 conditions per place. [2024-06-14 13:26:28,875 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-14 13:26:28,875 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 43 transitions, 177 flow [2024-06-14 13:26:28,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:26:28,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:26:28,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-14 13:26:28,888 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:26:28,889 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 71 transitions. [2024-06-14 13:26:28,890 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 43 transitions, 177 flow [2024-06-14 13:26:28,893 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:28,896 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:26:28,898 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 13:26:28,901 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:26:28,901 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:26:28,901 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:28,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:28,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:28,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:26:28,902 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 13:26:28,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:28,903 INFO L85 PathProgramCache]: Analyzing trace with hash 485861844, now seen corresponding path program 1 times [2024-06-14 13:26:28,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:28,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447081354] [2024-06-14 13:26:28,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:28,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:29,742 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 13:26:29,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:29,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447081354] [2024-06-14 13:26:29,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447081354] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:29,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:29,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:26:29,744 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000276188] [2024-06-14 13:26:29,744 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:29,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:26:29,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:29,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:26:29,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:26:29,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:26:29,789 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 13:26:29,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:29,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:26:29,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:30,157 INFO L124 PetriNetUnfolderBase]: 1395/2102 cut-off events. [2024-06-14 13:26:30,157 INFO L125 PetriNetUnfolderBase]: For 316/316 co-relation queries the response was YES. [2024-06-14 13:26:30,162 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4856 conditions, 2102 events. 1395/2102 cut-off events. For 316/316 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9499 event pairs, 862 based on Foata normal form. 3/2102 useless extension candidates. Maximal degree in co-relation 4841. Up to 2073 conditions per place. [2024-06-14 13:26:30,174 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 44 selfloop transitions, 7 changer transitions 0/55 dead transitions. [2024-06-14 13:26:30,174 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 55 transitions, 258 flow [2024-06-14 13:26:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:26:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:26:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2024-06-14 13:26:30,179 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:26:30,179 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 87 transitions. [2024-06-14 13:26:30,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 55 transitions, 258 flow [2024-06-14 13:26:30,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 55 transitions, 252 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:26:30,183 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 152 flow [2024-06-14 13:26:30,183 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=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=152, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-06-14 13:26:30,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 13:26:30,184 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 152 flow [2024-06-14 13:26:30,185 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 13:26:30,185 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:30,186 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:30,188 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:26:30,188 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 13:26:30,189 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:30,189 INFO L85 PathProgramCache]: Analyzing trace with hash -2118150516, now seen corresponding path program 1 times [2024-06-14 13:26:30,189 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:30,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722577811] [2024-06-14 13:26:30,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:30,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:30,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:31,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:31,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722577811] [2024-06-14 13:26:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722577811] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:31,040 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:31,040 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:26:31,040 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936948057] [2024-06-14 13:26:31,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:31,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:26:31,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:31,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:26:31,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:26:31,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:26:31,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 152 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 13:26:31,108 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:31,108 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:26:31,108 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:31,514 INFO L124 PetriNetUnfolderBase]: 1383/2084 cut-off events. [2024-06-14 13:26:31,514 INFO L125 PetriNetUnfolderBase]: For 1050/1058 co-relation queries the response was YES. [2024-06-14 13:26:31,519 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5363 conditions, 2084 events. 1383/2084 cut-off events. For 1050/1058 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9456 event pairs, 612 based on Foata normal form. 12/2093 useless extension candidates. Maximal degree in co-relation 5345. Up to 2025 conditions per place. [2024-06-14 13:26:31,528 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 52 selfloop transitions, 10 changer transitions 0/66 dead transitions. [2024-06-14 13:26:31,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 66 transitions, 344 flow [2024-06-14 13:26:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:26:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:26:31,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2024-06-14 13:26:31,530 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 13:26:31,530 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 152 flow. Second operand 5 states and 107 transitions. [2024-06-14 13:26:31,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 66 transitions, 344 flow [2024-06-14 13:26:31,532 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 66 transitions, 342 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:26:31,533 INFO L231 Difference]: Finished difference. Result has 51 places, 44 transitions, 198 flow [2024-06-14 13:26:31,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=198, PETRI_PLACES=51, PETRI_TRANSITIONS=44} [2024-06-14 13:26:31,534 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 9 predicate places. [2024-06-14 13:26:31,535 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 44 transitions, 198 flow [2024-06-14 13:26:31,535 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 13:26:31,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:31,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:31,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:26:31,535 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 13:26:31,536 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:31,536 INFO L85 PathProgramCache]: Analyzing trace with hash 271901579, now seen corresponding path program 1 times [2024-06-14 13:26:31,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:31,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847966588] [2024-06-14 13:26:31,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:31,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:31,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:32,841 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 13:26:32,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:32,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847966588] [2024-06-14 13:26:32,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847966588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:32,846 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:32,846 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:32,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1853815570] [2024-06-14 13:26:32,847 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:32,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:32,848 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:32,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:32,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:32,911 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:26:32,911 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 44 transitions, 198 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 13:26:32,912 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:32,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:26:32,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:33,396 INFO L124 PetriNetUnfolderBase]: 1374/2069 cut-off events. [2024-06-14 13:26:33,397 INFO L125 PetriNetUnfolderBase]: For 1912/1920 co-relation queries the response was YES. [2024-06-14 13:26:33,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5862 conditions, 2069 events. 1374/2069 cut-off events. For 1912/1920 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 9306 event pairs, 472 based on Foata normal form. 12/2078 useless extension candidates. Maximal degree in co-relation 5841. Up to 1980 conditions per place. [2024-06-14 13:26:33,410 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 12 changer transitions 0/72 dead transitions. [2024-06-14 13:26:33,410 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 408 flow [2024-06-14 13:26:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:33,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:33,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 122 transitions. [2024-06-14 13:26:33,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4959349593495935 [2024-06-14 13:26:33,414 INFO L175 Difference]: Start difference. First operand has 51 places, 44 transitions, 198 flow. Second operand 6 states and 122 transitions. [2024-06-14 13:26:33,415 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 408 flow [2024-06-14 13:26:33,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 72 transitions, 386 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:33,421 INFO L231 Difference]: Finished difference. Result has 53 places, 45 transitions, 217 flow [2024-06-14 13:26:33,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=217, PETRI_PLACES=53, PETRI_TRANSITIONS=45} [2024-06-14 13:26:33,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-14 13:26:33,422 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 45 transitions, 217 flow [2024-06-14 13:26:33,423 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 13:26:33,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:33,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:33,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:26:33,424 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 13:26:33,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:33,424 INFO L85 PathProgramCache]: Analyzing trace with hash -713409677, now seen corresponding path program 1 times [2024-06-14 13:26:33,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:33,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457792640] [2024-06-14 13:26:33,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:33,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:33,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:34,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:34,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:34,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457792640] [2024-06-14 13:26:34,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457792640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:34,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:34,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:26:34,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641804666] [2024-06-14 13:26:34,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:34,341 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:26:34,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:34,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:26:34,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:26:34,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 41 [2024-06-14 13:26:34,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 45 transitions, 217 flow. Second operand has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:34,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:34,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 41 [2024-06-14 13:26:34,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:34,794 INFO L124 PetriNetUnfolderBase]: 1245/1902 cut-off events. [2024-06-14 13:26:34,795 INFO L125 PetriNetUnfolderBase]: For 2916/2940 co-relation queries the response was YES. [2024-06-14 13:26:34,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5682 conditions, 1902 events. 1245/1902 cut-off events. For 2916/2940 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 8786 event pairs, 585 based on Foata normal form. 4/1836 useless extension candidates. Maximal degree in co-relation 5660. Up to 1826 conditions per place. [2024-06-14 13:26:34,810 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 10 changer transitions 0/63 dead transitions. [2024-06-14 13:26:34,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 63 transitions, 379 flow [2024-06-14 13:26:34,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:26:34,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:26:34,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-14 13:26:34,813 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44390243902439025 [2024-06-14 13:26:34,813 INFO L175 Difference]: Start difference. First operand has 53 places, 45 transitions, 217 flow. Second operand 5 states and 91 transitions. [2024-06-14 13:26:34,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 63 transitions, 379 flow [2024-06-14 13:26:34,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 63 transitions, 348 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:34,823 INFO L231 Difference]: Finished difference. Result has 55 places, 51 transitions, 257 flow [2024-06-14 13:26:34,823 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=186, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=257, PETRI_PLACES=55, PETRI_TRANSITIONS=51} [2024-06-14 13:26:34,825 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 13 predicate places. [2024-06-14 13:26:34,825 INFO L495 AbstractCegarLoop]: Abstraction has has 55 places, 51 transitions, 257 flow [2024-06-14 13:26:34,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 10.666666666666666) internal successors, (64), 6 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:26:34,827 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:34,827 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:34,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:26:34,828 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 13:26:34,828 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:34,828 INFO L85 PathProgramCache]: Analyzing trace with hash -674824427, now seen corresponding path program 1 times [2024-06-14 13:26:34,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:34,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181046954] [2024-06-14 13:26:34,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:34,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:34,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:35,765 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:35,766 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:35,766 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181046954] [2024-06-14 13:26:35,766 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181046954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:35,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:35,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:35,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014243975] [2024-06-14 13:26:35,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:35,767 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:35,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:35,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:35,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:35,850 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:35,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 51 transitions, 257 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 13:26:35,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:35,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:35,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:36,339 INFO L124 PetriNetUnfolderBase]: 1476/2248 cut-off events. [2024-06-14 13:26:36,340 INFO L125 PetriNetUnfolderBase]: For 4593/4613 co-relation queries the response was YES. [2024-06-14 13:26:36,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7248 conditions, 2248 events. 1476/2248 cut-off events. For 4593/4613 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 10519 event pairs, 721 based on Foata normal form. 2/2213 useless extension candidates. Maximal degree in co-relation 7223. Up to 2148 conditions per place. [2024-06-14 13:26:36,360 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 56 selfloop transitions, 11 changer transitions 0/75 dead transitions. [2024-06-14 13:26:36,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 75 transitions, 477 flow [2024-06-14 13:26:36,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:36,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:36,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 101 transitions. [2024-06-14 13:26:36,362 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4105691056910569 [2024-06-14 13:26:36,362 INFO L175 Difference]: Start difference. First operand has 55 places, 51 transitions, 257 flow. Second operand 6 states and 101 transitions. [2024-06-14 13:26:36,363 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 75 transitions, 477 flow [2024-06-14 13:26:36,366 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 75 transitions, 459 flow, removed 3 selfloop flow, removed 2 redundant places. [2024-06-14 13:26:36,368 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 339 flow [2024-06-14 13:26:36,369 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=339, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-06-14 13:26:36,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 19 predicate places. [2024-06-14 13:26:36,371 INFO L495 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 339 flow [2024-06-14 13:26:36,372 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 13:26:36,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:36,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:36,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:26:36,372 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 13:26:36,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:36,373 INFO L85 PathProgramCache]: Analyzing trace with hash 402277182, now seen corresponding path program 1 times [2024-06-14 13:26:36,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:36,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513392348] [2024-06-14 13:26:36,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:36,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:37,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:37,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:37,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513392348] [2024-06-14 13:26:37,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513392348] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:37,270 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:37,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:37,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622597820] [2024-06-14 13:26:37,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:37,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:37,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:37,271 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:37,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:37,322 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:37,322 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 339 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 13:26:37,322 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:37,322 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:37,322 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:37,827 INFO L124 PetriNetUnfolderBase]: 1530/2301 cut-off events. [2024-06-14 13:26:37,828 INFO L125 PetriNetUnfolderBase]: For 5834/5868 co-relation queries the response was YES. [2024-06-14 13:26:37,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8113 conditions, 2301 events. 1530/2301 cut-off events. For 5834/5868 co-relation queries the response was YES. Maximal size of possible extension queue 116. Compared 10412 event pairs, 699 based on Foata normal form. 14/2304 useless extension candidates. Maximal degree in co-relation 8084. Up to 2251 conditions per place. [2024-06-14 13:26:37,860 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 61 selfloop transitions, 13 changer transitions 0/81 dead transitions. [2024-06-14 13:26:37,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 81 transitions, 549 flow [2024-06-14 13:26:37,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:37,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:37,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:26:37,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 13:26:37,862 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 339 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:26:37,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 81 transitions, 549 flow [2024-06-14 13:26:37,868 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 81 transitions, 543 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:26:37,870 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 389 flow [2024-06-14 13:26:37,870 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=333, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=389, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-06-14 13:26:37,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 24 predicate places. [2024-06-14 13:26:37,872 INFO L495 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 389 flow [2024-06-14 13:26:37,872 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 13:26:37,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:37,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:37,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:26:37,872 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 13:26:37,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:37,873 INFO L85 PathProgramCache]: Analyzing trace with hash 1608086098, now seen corresponding path program 2 times [2024-06-14 13:26:37,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:37,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375433837] [2024-06-14 13:26:37,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:37,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:37,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:38,821 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:38,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:38,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375433837] [2024-06-14 13:26:38,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375433837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:38,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:38,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:26:38,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825278928] [2024-06-14 13:26:38,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:38,822 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:26:38,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:26:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:26:38,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:38,890 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 389 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 13:26:38,890 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:38,890 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:38,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:39,354 INFO L124 PetriNetUnfolderBase]: 1554/2338 cut-off events. [2024-06-14 13:26:39,354 INFO L125 PetriNetUnfolderBase]: For 7859/7920 co-relation queries the response was YES. [2024-06-14 13:26:39,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8912 conditions, 2338 events. 1554/2338 cut-off events. For 7859/7920 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 10652 event pairs, 702 based on Foata normal form. 15/2341 useless extension candidates. Maximal degree in co-relation 8880. Up to 2264 conditions per place. [2024-06-14 13:26:39,370 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 19 changer transitions 0/84 dead transitions. [2024-06-14 13:26:39,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 84 transitions, 625 flow [2024-06-14 13:26:39,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:26:39,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:26:39,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:26:39,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-14 13:26:39,373 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 389 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:26:39,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 84 transitions, 625 flow [2024-06-14 13:26:39,379 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 84 transitions, 593 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:39,380 INFO L231 Difference]: Finished difference. Result has 69 places, 69 transitions, 469 flow [2024-06-14 13:26:39,381 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=357, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=469, PETRI_PLACES=69, PETRI_TRANSITIONS=69} [2024-06-14 13:26:39,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-14 13:26:39,383 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 69 transitions, 469 flow [2024-06-14 13:26:39,383 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 13:26:39,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:39,383 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:39,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:26:39,383 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 13:26:39,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash 555280094, now seen corresponding path program 1 times [2024-06-14 13:26:39,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:39,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995736185] [2024-06-14 13:26:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:39,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:39,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:40,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:40,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:40,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995736185] [2024-06-14 13:26:40,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995736185] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:40,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:40,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:40,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [444380224] [2024-06-14 13:26:40,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:40,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:40,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:40,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:40,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:40,729 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:40,729 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 69 transitions, 469 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 13:26:40,729 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:40,729 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:40,729 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:41,276 INFO L124 PetriNetUnfolderBase]: 1538/2324 cut-off events. [2024-06-14 13:26:41,278 INFO L125 PetriNetUnfolderBase]: For 10438/10488 co-relation queries the response was YES. [2024-06-14 13:26:41,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9196 conditions, 2324 events. 1538/2324 cut-off events. For 10438/10488 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 10920 event pairs, 706 based on Foata normal form. 2/2283 useless extension candidates. Maximal degree in co-relation 9162. Up to 2214 conditions per place. [2024-06-14 13:26:41,291 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 66 selfloop transitions, 14 changer transitions 0/91 dead transitions. [2024-06-14 13:26:41,292 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 91 transitions, 691 flow [2024-06-14 13:26:41,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:41,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:41,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:26:41,296 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 13:26:41,296 INFO L175 Difference]: Start difference. First operand has 69 places, 69 transitions, 469 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:26:41,296 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 91 transitions, 691 flow [2024-06-14 13:26:41,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 91 transitions, 647 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:41,307 INFO L231 Difference]: Finished difference. Result has 73 places, 72 transitions, 481 flow [2024-06-14 13:26:41,307 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=425, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=73, PETRI_TRANSITIONS=72} [2024-06-14 13:26:41,308 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 13:26:41,308 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 72 transitions, 481 flow [2024-06-14 13:26:41,308 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 13:26:41,309 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:41,309 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:41,309 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:26:41,309 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 13:26:41,309 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:41,310 INFO L85 PathProgramCache]: Analyzing trace with hash -143683142, now seen corresponding path program 1 times [2024-06-14 13:26:41,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:41,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1836115555] [2024-06-14 13:26:41,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:41,311 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:41,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:42,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:42,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1836115555] [2024-06-14 13:26:42,229 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1836115555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:42,229 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:42,229 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:42,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414527911] [2024-06-14 13:26:42,229 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:42,230 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:42,230 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:42,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:42,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:42,320 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:42,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 72 transitions, 481 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 13:26:42,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:42,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:42,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:42,842 INFO L124 PetriNetUnfolderBase]: 1546/2329 cut-off events. [2024-06-14 13:26:42,842 INFO L125 PetriNetUnfolderBase]: For 12530/12569 co-relation queries the response was YES. [2024-06-14 13:26:42,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9842 conditions, 2329 events. 1546/2329 cut-off events. For 12530/12569 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 10729 event pairs, 553 based on Foata normal form. 29/2309 useless extension candidates. Maximal degree in co-relation 9807. Up to 2202 conditions per place. [2024-06-14 13:26:42,858 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 77 selfloop transitions, 19 changer transitions 0/104 dead transitions. [2024-06-14 13:26:42,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 104 transitions, 771 flow [2024-06-14 13:26:42,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:42,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:26:42,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:26:42,860 INFO L175 Difference]: Start difference. First operand has 73 places, 72 transitions, 481 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:26:42,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 104 transitions, 771 flow [2024-06-14 13:26:42,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 104 transitions, 739 flow, removed 4 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:42,871 INFO L231 Difference]: Finished difference. Result has 76 places, 78 transitions, 539 flow [2024-06-14 13:26:42,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=449, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=539, PETRI_PLACES=76, PETRI_TRANSITIONS=78} [2024-06-14 13:26:42,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-14 13:26:42,871 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 78 transitions, 539 flow [2024-06-14 13:26:42,872 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 13:26:42,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:42,872 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:42,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:26:42,872 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 13:26:42,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:42,872 INFO L85 PathProgramCache]: Analyzing trace with hash 27139444, now seen corresponding path program 1 times [2024-06-14 13:26:42,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:42,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953432468] [2024-06-14 13:26:42,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:42,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:42,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:43,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:43,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:43,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953432468] [2024-06-14 13:26:43,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1953432468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:43,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:43,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:43,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [16537641] [2024-06-14 13:26:43,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:43,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:43,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:43,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:43,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:43,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:26:43,822 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 78 transitions, 539 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 13:26:43,822 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:43,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:26:43,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:44,263 INFO L124 PetriNetUnfolderBase]: 1644/2457 cut-off events. [2024-06-14 13:26:44,263 INFO L125 PetriNetUnfolderBase]: For 14095/14095 co-relation queries the response was YES. [2024-06-14 13:26:44,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10886 conditions, 2457 events. 1644/2457 cut-off events. For 14095/14095 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11077 event pairs, 602 based on Foata normal form. 2/2456 useless extension candidates. Maximal degree in co-relation 10849. Up to 2411 conditions per place. [2024-06-14 13:26:44,281 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 92 selfloop transitions, 14 changer transitions 0/109 dead transitions. [2024-06-14 13:26:44,281 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 109 transitions, 871 flow [2024-06-14 13:26:44,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:44,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:44,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:26:44,283 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 13:26:44,283 INFO L175 Difference]: Start difference. First operand has 76 places, 78 transitions, 539 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:26:44,283 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 109 transitions, 871 flow [2024-06-14 13:26:44,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 109 transitions, 833 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:44,296 INFO L231 Difference]: Finished difference. Result has 82 places, 87 transitions, 623 flow [2024-06-14 13:26:44,297 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=623, PETRI_PLACES=82, PETRI_TRANSITIONS=87} [2024-06-14 13:26:44,297 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-14 13:26:44,297 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 87 transitions, 623 flow [2024-06-14 13:26:44,297 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 13:26:44,297 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:44,298 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:44,298 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:26:44,298 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 13:26:44,298 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:44,298 INFO L85 PathProgramCache]: Analyzing trace with hash -414308612, now seen corresponding path program 2 times [2024-06-14 13:26:44,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:44,299 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134213636] [2024-06-14 13:26:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:44,299 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:44,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:45,175 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 13:26:45,176 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:45,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134213636] [2024-06-14 13:26:45,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134213636] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:45,176 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:45,176 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:45,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261961209] [2024-06-14 13:26:45,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:45,177 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:45,177 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:45,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:45,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:45,260 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:45,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 87 transitions, 623 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 13:26:45,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:45,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:45,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:45,790 INFO L124 PetriNetUnfolderBase]: 1599/2411 cut-off events. [2024-06-14 13:26:45,791 INFO L125 PetriNetUnfolderBase]: For 18850/18908 co-relation queries the response was YES. [2024-06-14 13:26:45,800 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11449 conditions, 2411 events. 1599/2411 cut-off events. For 18850/18908 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 11096 event pairs, 532 based on Foata normal form. 30/2394 useless extension candidates. Maximal degree in co-relation 11409. Up to 2228 conditions per place. [2024-06-14 13:26:45,809 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 79 selfloop transitions, 29 changer transitions 0/119 dead transitions. [2024-06-14 13:26:45,809 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 119 transitions, 1007 flow [2024-06-14 13:26:45,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:45,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:45,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-14 13:26:45,812 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:26:45,812 INFO L175 Difference]: Start difference. First operand has 82 places, 87 transitions, 623 flow. Second operand 7 states and 126 transitions. [2024-06-14 13:26:45,812 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 119 transitions, 1007 flow [2024-06-14 13:26:45,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 119 transitions, 981 flow, removed 10 selfloop flow, removed 2 redundant places. [2024-06-14 13:26:45,829 INFO L231 Difference]: Finished difference. Result has 87 places, 93 transitions, 726 flow [2024-06-14 13:26:45,829 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=597, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=726, PETRI_PLACES=87, PETRI_TRANSITIONS=93} [2024-06-14 13:26:45,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-14 13:26:45,830 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 93 transitions, 726 flow [2024-06-14 13:26:45,830 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 13:26:45,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:45,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:45,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:26:45,831 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 13:26:45,831 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:45,831 INFO L85 PathProgramCache]: Analyzing trace with hash 33568348, now seen corresponding path program 3 times [2024-06-14 13:26:45,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:45,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453551362] [2024-06-14 13:26:45,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:45,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:45,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:46,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:46,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:46,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453551362] [2024-06-14 13:26:46,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453551362] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:46,762 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:46,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:46,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218730596] [2024-06-14 13:26:46,762 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:46,762 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:46,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:46,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:46,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:46,829 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:46,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 93 transitions, 726 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 13:26:46,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:46,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:46,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:47,328 INFO L124 PetriNetUnfolderBase]: 1605/2424 cut-off events. [2024-06-14 13:26:47,329 INFO L125 PetriNetUnfolderBase]: For 23055/23137 co-relation queries the response was YES. [2024-06-14 13:26:47,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12150 conditions, 2424 events. 1605/2424 cut-off events. For 23055/23137 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 11224 event pairs, 549 based on Foata normal form. 33/2403 useless extension candidates. Maximal degree in co-relation 12108. Up to 2193 conditions per place. [2024-06-14 13:26:47,349 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 72 selfloop transitions, 36 changer transitions 0/119 dead transitions. [2024-06-14 13:26:47,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 119 transitions, 1084 flow [2024-06-14 13:26:47,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:47,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:47,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-14 13:26:47,351 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4355400696864111 [2024-06-14 13:26:47,351 INFO L175 Difference]: Start difference. First operand has 87 places, 93 transitions, 726 flow. Second operand 7 states and 125 transitions. [2024-06-14 13:26:47,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 119 transitions, 1084 flow [2024-06-14 13:26:47,368 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 119 transitions, 1044 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:47,370 INFO L231 Difference]: Finished difference. Result has 91 places, 96 transitions, 806 flow [2024-06-14 13:26:47,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=806, PETRI_PLACES=91, PETRI_TRANSITIONS=96} [2024-06-14 13:26:47,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 49 predicate places. [2024-06-14 13:26:47,372 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 96 transitions, 806 flow [2024-06-14 13:26:47,372 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 13:26:47,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:47,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:47,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:26:47,372 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 13:26:47,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:47,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1688937694, now seen corresponding path program 2 times [2024-06-14 13:26:47,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:47,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601531736] [2024-06-14 13:26:47,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:47,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:47,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:48,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:48,245 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:48,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601531736] [2024-06-14 13:26:48,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601531736] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:48,246 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:48,246 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:48,246 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619986497] [2024-06-14 13:26:48,246 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:48,246 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:48,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:48,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:48,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:48,335 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:26:48,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 96 transitions, 806 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 13:26:48,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:48,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:26:48,336 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:48,763 INFO L124 PetriNetUnfolderBase]: 1695/2533 cut-off events. [2024-06-14 13:26:48,763 INFO L125 PetriNetUnfolderBase]: For 24040/24055 co-relation queries the response was YES. [2024-06-14 13:26:48,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12987 conditions, 2533 events. 1695/2533 cut-off events. For 24040/24055 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11483 event pairs, 600 based on Foata normal form. 12/2540 useless extension candidates. Maximal degree in co-relation 12943. Up to 2438 conditions per place. [2024-06-14 13:26:48,781 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 97 selfloop transitions, 25 changer transitions 0/125 dead transitions. [2024-06-14 13:26:48,781 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 125 transitions, 1217 flow [2024-06-14 13:26:48,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:48,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:48,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:26:48,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 13:26:48,783 INFO L175 Difference]: Start difference. First operand has 91 places, 96 transitions, 806 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:26:48,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 125 transitions, 1217 flow [2024-06-14 13:26:48,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 125 transitions, 1118 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:48,803 INFO L231 Difference]: Finished difference. Result has 94 places, 104 transitions, 845 flow [2024-06-14 13:26:48,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=710, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=845, PETRI_PLACES=94, PETRI_TRANSITIONS=104} [2024-06-14 13:26:48,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-14 13:26:48,804 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 104 transitions, 845 flow [2024-06-14 13:26:48,804 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 13:26:48,804 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:48,804 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:48,804 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:26:48,804 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 13:26:48,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:48,805 INFO L85 PathProgramCache]: Analyzing trace with hash 33805684, now seen corresponding path program 3 times [2024-06-14 13:26:48,805 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:48,805 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333264895] [2024-06-14 13:26:48,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:48,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:48,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:49,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:49,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:49,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333264895] [2024-06-14 13:26:49,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333264895] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:49,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:49,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:26:49,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993398717] [2024-06-14 13:26:49,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:49,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:26:49,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:49,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:26:49,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:26:49,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:26:49,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 104 transitions, 845 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 13:26:49,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:49,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:26:49,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:50,157 INFO L124 PetriNetUnfolderBase]: 1690/2526 cut-off events. [2024-06-14 13:26:50,158 INFO L125 PetriNetUnfolderBase]: For 26969/26984 co-relation queries the response was YES. [2024-06-14 13:26:50,165 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13308 conditions, 2526 events. 1690/2526 cut-off events. For 26969/26984 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11456 event pairs, 600 based on Foata normal form. 12/2533 useless extension candidates. Maximal degree in co-relation 13262. Up to 2433 conditions per place. [2024-06-14 13:26:50,175 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 94 selfloop transitions, 27 changer transitions 0/124 dead transitions. [2024-06-14 13:26:50,175 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 124 transitions, 1146 flow [2024-06-14 13:26:50,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:50,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:50,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-14 13:26:50,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39372822299651566 [2024-06-14 13:26:50,177 INFO L175 Difference]: Start difference. First operand has 94 places, 104 transitions, 845 flow. Second operand 7 states and 113 transitions. [2024-06-14 13:26:50,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 124 transitions, 1146 flow [2024-06-14 13:26:50,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 124 transitions, 1064 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:26:50,206 INFO L231 Difference]: Finished difference. Result has 96 places, 105 transitions, 836 flow [2024-06-14 13:26:50,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=769, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=836, PETRI_PLACES=96, PETRI_TRANSITIONS=105} [2024-06-14 13:26:50,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 54 predicate places. [2024-06-14 13:26:50,207 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 105 transitions, 836 flow [2024-06-14 13:26:50,208 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 13:26:50,208 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:50,208 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:50,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:26:50,208 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 13:26:50,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:50,209 INFO L85 PathProgramCache]: Analyzing trace with hash 33814612, now seen corresponding path program 1 times [2024-06-14 13:26:50,209 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:50,209 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7051121] [2024-06-14 13:26:50,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:50,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:50,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:51,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:51,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:51,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7051121] [2024-06-14 13:26:51,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7051121] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:51,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:51,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:51,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380867394] [2024-06-14 13:26:51,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:51,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:51,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:51,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:51,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:51,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:51,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 105 transitions, 836 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 13:26:51,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:51,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:51,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:52,033 INFO L124 PetriNetUnfolderBase]: 1623/2449 cut-off events. [2024-06-14 13:26:52,034 INFO L125 PetriNetUnfolderBase]: For 30342/30456 co-relation queries the response was YES. [2024-06-14 13:26:52,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12939 conditions, 2449 events. 1623/2449 cut-off events. For 30342/30456 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11380 event pairs, 538 based on Foata normal form. 4/2416 useless extension candidates. Maximal degree in co-relation 12893. Up to 2308 conditions per place. [2024-06-14 13:26:52,050 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 99 selfloop transitions, 16 changer transitions 0/131 dead transitions. [2024-06-14 13:26:52,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 131 transitions, 1142 flow [2024-06-14 13:26:52,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:52,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:52,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-14 13:26:52,053 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39939024390243905 [2024-06-14 13:26:52,053 INFO L175 Difference]: Start difference. First operand has 96 places, 105 transitions, 836 flow. Second operand 8 states and 131 transitions. [2024-06-14 13:26:52,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 131 transitions, 1142 flow [2024-06-14 13:26:52,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 131 transitions, 1100 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:26:52,089 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 853 flow [2024-06-14 13:26:52,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=853, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2024-06-14 13:26:52,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 58 predicate places. [2024-06-14 13:26:52,091 INFO L495 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 853 flow [2024-06-14 13:26:52,092 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 13:26:52,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:52,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:52,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:26:52,094 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 13:26:52,094 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:52,095 INFO L85 PathProgramCache]: Analyzing trace with hash 37526301, now seen corresponding path program 1 times [2024-06-14 13:26:52,095 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:52,095 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834207227] [2024-06-14 13:26:52,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:52,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:52,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:53,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:53,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834207227] [2024-06-14 13:26:53,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834207227] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:53,372 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:53,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:53,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915755933] [2024-06-14 13:26:53,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:53,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:53,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:53,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:53,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:53,477 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:26:53,478 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 853 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 13:26:53,478 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:53,478 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:26:53,478 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:54,048 INFO L124 PetriNetUnfolderBase]: 1586/2390 cut-off events. [2024-06-14 13:26:54,048 INFO L125 PetriNetUnfolderBase]: For 32986/33050 co-relation queries the response was YES. [2024-06-14 13:26:54,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13058 conditions, 2390 events. 1586/2390 cut-off events. For 32986/33050 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 10880 event pairs, 534 based on Foata normal form. 33/2395 useless extension candidates. Maximal degree in co-relation 13011. Up to 2233 conditions per place. [2024-06-14 13:26:54,061 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 95 selfloop transitions, 23 changer transitions 0/133 dead transitions. [2024-06-14 13:26:54,062 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 133 transitions, 1157 flow [2024-06-14 13:26:54,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:26:54,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:26:54,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:26:54,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:26:54,063 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 853 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:26:54,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 133 transitions, 1157 flow [2024-06-14 13:26:54,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 133 transitions, 1106 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:54,088 INFO L231 Difference]: Finished difference. Result has 101 places, 107 transitions, 860 flow [2024-06-14 13:26:54,088 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=802, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=101, PETRI_TRANSITIONS=107} [2024-06-14 13:26:54,089 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 59 predicate places. [2024-06-14 13:26:54,089 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 107 transitions, 860 flow [2024-06-14 13:26:54,089 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 13:26:54,089 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:54,089 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:54,090 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:26:54,090 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 13:26:54,090 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:54,090 INFO L85 PathProgramCache]: Analyzing trace with hash 841173668, now seen corresponding path program 1 times [2024-06-14 13:26:54,090 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:54,091 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006183896] [2024-06-14 13:26:54,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:54,091 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:54,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:54,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:54,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:54,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006183896] [2024-06-14 13:26:54,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1006183896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:54,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:54,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:54,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732411094] [2024-06-14 13:26:54,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:54,929 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:54,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:54,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:54,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:55,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:26:55,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 107 transitions, 860 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 13:26:55,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:55,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:26:55,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:55,557 INFO L124 PetriNetUnfolderBase]: 1696/2533 cut-off events. [2024-06-14 13:26:55,557 INFO L125 PetriNetUnfolderBase]: For 34979/34979 co-relation queries the response was YES. [2024-06-14 13:26:55,564 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13818 conditions, 2533 events. 1696/2533 cut-off events. For 34979/34979 co-relation queries the response was YES. Maximal size of possible extension queue 110. Compared 11379 event pairs, 554 based on Foata normal form. 4/2534 useless extension candidates. Maximal degree in co-relation 13770. Up to 2434 conditions per place. [2024-06-14 13:26:55,572 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 127 selfloop transitions, 20 changer transitions 0/150 dead transitions. [2024-06-14 13:26:55,572 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 150 transitions, 1340 flow [2024-06-14 13:26:55,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:55,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:55,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:26:55,574 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 13:26:55,574 INFO L175 Difference]: Start difference. First operand has 101 places, 107 transitions, 860 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:26:55,574 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 150 transitions, 1340 flow [2024-06-14 13:26:55,593 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 150 transitions, 1271 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:26:55,595 INFO L231 Difference]: Finished difference. Result has 106 places, 119 transitions, 977 flow [2024-06-14 13:26:55,596 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=977, PETRI_PLACES=106, PETRI_TRANSITIONS=119} [2024-06-14 13:26:55,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 64 predicate places. [2024-06-14 13:26:55,596 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 119 transitions, 977 flow [2024-06-14 13:26:55,597 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 13:26:55,597 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:55,597 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:55,597 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:26:55,597 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 13:26:55,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:55,598 INFO L85 PathProgramCache]: Analyzing trace with hash 41341533, now seen corresponding path program 1 times [2024-06-14 13:26:55,598 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:55,598 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [307578712] [2024-06-14 13:26:55,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:55,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:55,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:56,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:26:56,624 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:56,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [307578712] [2024-06-14 13:26:56,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [307578712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:56,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:56,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:56,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [549939331] [2024-06-14 13:26:56,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:56,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:56,625 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:56,625 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:56,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:56,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:26:56,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 119 transitions, 977 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 13:26:56,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:56,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:26:56,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:57,359 INFO L124 PetriNetUnfolderBase]: 1767/2637 cut-off events. [2024-06-14 13:26:57,360 INFO L125 PetriNetUnfolderBase]: For 40583/40583 co-relation queries the response was YES. [2024-06-14 13:26:57,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14938 conditions, 2637 events. 1767/2637 cut-off events. For 40583/40583 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11895 event pairs, 481 based on Foata normal form. 6/2640 useless extension candidates. Maximal degree in co-relation 14886. Up to 2406 conditions per place. [2024-06-14 13:26:57,377 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 125 selfloop transitions, 34 changer transitions 0/162 dead transitions. [2024-06-14 13:26:57,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 162 transitions, 1553 flow [2024-06-14 13:26:57,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:57,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:57,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:26:57,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 13:26:57,379 INFO L175 Difference]: Start difference. First operand has 106 places, 119 transitions, 977 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:26:57,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 162 transitions, 1553 flow [2024-06-14 13:26:57,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 162 transitions, 1511 flow, removed 18 selfloop flow, removed 2 redundant places. [2024-06-14 13:26:57,418 INFO L231 Difference]: Finished difference. Result has 114 places, 131 transitions, 1161 flow [2024-06-14 13:26:57,418 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=935, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1161, PETRI_PLACES=114, PETRI_TRANSITIONS=131} [2024-06-14 13:26:57,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 72 predicate places. [2024-06-14 13:26:57,419 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 131 transitions, 1161 flow [2024-06-14 13:26:57,419 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 13:26:57,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:57,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:57,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:26:57,420 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 13:26:57,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:57,420 INFO L85 PathProgramCache]: Analyzing trace with hash -155484636, now seen corresponding path program 2 times [2024-06-14 13:26:57,420 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:57,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1854640839] [2024-06-14 13:26:57,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:57,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:57,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:58,314 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 13:26:58,314 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:58,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1854640839] [2024-06-14 13:26:58,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1854640839] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:58,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:58,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:58,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962823052] [2024-06-14 13:26:58,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:58,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:58,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:58,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:58,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:58,371 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:26:58,372 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 131 transitions, 1161 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 13:26:58,372 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:58,372 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:26:58,372 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:26:58,886 INFO L124 PetriNetUnfolderBase]: 1811/2701 cut-off events. [2024-06-14 13:26:58,886 INFO L125 PetriNetUnfolderBase]: For 47029/47029 co-relation queries the response was YES. [2024-06-14 13:26:58,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16289 conditions, 2701 events. 1811/2701 cut-off events. For 47029/47029 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12172 event pairs, 483 based on Foata normal form. 8/2706 useless extension candidates. Maximal degree in co-relation 16233. Up to 2429 conditions per place. [2024-06-14 13:26:58,904 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 127 selfloop transitions, 38 changer transitions 0/168 dead transitions. [2024-06-14 13:26:58,904 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 168 transitions, 1723 flow [2024-06-14 13:26:58,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:26:58,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:26:58,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:26:58,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:26:58,906 INFO L175 Difference]: Start difference. First operand has 114 places, 131 transitions, 1161 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:26:58,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 168 transitions, 1723 flow [2024-06-14 13:26:58,950 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 168 transitions, 1667 flow, removed 21 selfloop flow, removed 3 redundant places. [2024-06-14 13:26:58,952 INFO L231 Difference]: Finished difference. Result has 119 places, 137 transitions, 1275 flow [2024-06-14 13:26:58,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1109, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1275, PETRI_PLACES=119, PETRI_TRANSITIONS=137} [2024-06-14 13:26:58,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 77 predicate places. [2024-06-14 13:26:58,953 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 137 transitions, 1275 flow [2024-06-14 13:26:58,953 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 13:26:58,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:26:58,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:26:58,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:26:58,954 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 13:26:58,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:26:58,954 INFO L85 PathProgramCache]: Analyzing trace with hash 41335736, now seen corresponding path program 3 times [2024-06-14 13:26:58,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:26:58,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264456270] [2024-06-14 13:26:58,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:26:58,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:26:58,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:26:59,830 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 13:26:59,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:26:59,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264456270] [2024-06-14 13:26:59,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264456270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:26:59,831 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:26:59,831 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:26:59,831 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354047668] [2024-06-14 13:26:59,831 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:26:59,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:26:59,832 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:26:59,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:26:59,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:26:59,916 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:26:59,917 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 137 transitions, 1275 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 13:26:59,917 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:26:59,917 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:26:59,917 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:00,570 INFO L124 PetriNetUnfolderBase]: 1814/2705 cut-off events. [2024-06-14 13:27:00,570 INFO L125 PetriNetUnfolderBase]: For 50878/50878 co-relation queries the response was YES. [2024-06-14 13:27:00,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16873 conditions, 2705 events. 1814/2705 cut-off events. For 50878/50878 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12221 event pairs, 502 based on Foata normal form. 4/2706 useless extension candidates. Maximal degree in co-relation 16815. Up to 2432 conditions per place. [2024-06-14 13:27:00,585 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 40 changer transitions 0/172 dead transitions. [2024-06-14 13:27:00,585 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 172 transitions, 1832 flow [2024-06-14 13:27:00,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:00,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:00,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:27:00,587 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:27:00,587 INFO L175 Difference]: Start difference. First operand has 119 places, 137 transitions, 1275 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:27:00,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 172 transitions, 1832 flow [2024-06-14 13:27:00,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 172 transitions, 1731 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:00,630 INFO L231 Difference]: Finished difference. Result has 122 places, 141 transitions, 1321 flow [2024-06-14 13:27:00,631 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1178, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1321, PETRI_PLACES=122, PETRI_TRANSITIONS=141} [2024-06-14 13:27:00,631 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-14 13:27:00,631 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 141 transitions, 1321 flow [2024-06-14 13:27:00,631 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 13:27:00,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:00,632 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:00,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:27:00,632 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 13:27:00,632 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:00,632 INFO L85 PathProgramCache]: Analyzing trace with hash -809841551, now seen corresponding path program 2 times [2024-06-14 13:27:00,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:00,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681339151] [2024-06-14 13:27:00,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:00,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:00,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:01,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:01,608 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:01,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681339151] [2024-06-14 13:27:01,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681339151] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:01,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:01,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:01,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1095803253] [2024-06-14 13:27:01,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:01,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:01,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:01,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:01,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:01,715 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:01,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 141 transitions, 1321 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 13:27:01,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:01,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:01,715 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:02,217 INFO L124 PetriNetUnfolderBase]: 1825/2723 cut-off events. [2024-06-14 13:27:02,217 INFO L125 PetriNetUnfolderBase]: For 55411/55435 co-relation queries the response was YES. [2024-06-14 13:27:02,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17114 conditions, 2723 events. 1825/2723 cut-off events. For 55411/55435 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12327 event pairs, 528 based on Foata normal form. 18/2736 useless extension candidates. Maximal degree in co-relation 17055. Up to 2587 conditions per place. [2024-06-14 13:27:02,234 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 136 selfloop transitions, 39 changer transitions 0/178 dead transitions. [2024-06-14 13:27:02,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 178 transitions, 1911 flow [2024-06-14 13:27:02,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:02,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:02,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:27:02,236 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:27:02,236 INFO L175 Difference]: Start difference. First operand has 122 places, 141 transitions, 1321 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:27:02,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 178 transitions, 1911 flow [2024-06-14 13:27:02,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 178 transitions, 1836 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:02,285 INFO L231 Difference]: Finished difference. Result has 128 places, 149 transitions, 1439 flow [2024-06-14 13:27:02,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1248, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1439, PETRI_PLACES=128, PETRI_TRANSITIONS=149} [2024-06-14 13:27:02,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 86 predicate places. [2024-06-14 13:27:02,286 INFO L495 AbstractCegarLoop]: Abstraction has has 128 places, 149 transitions, 1439 flow [2024-06-14 13:27:02,286 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 13:27:02,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:02,287 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:02,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:27:02,287 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 13:27:02,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:02,287 INFO L85 PathProgramCache]: Analyzing trace with hash -810108678, now seen corresponding path program 4 times [2024-06-14 13:27:02,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:02,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130131911] [2024-06-14 13:27:02,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:02,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:02,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:03,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:03,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:03,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130131911] [2024-06-14 13:27:03,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130131911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:03,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:03,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:03,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463257587] [2024-06-14 13:27:03,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:03,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:03,173 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:03,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:03,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:03,219 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:03,219 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 149 transitions, 1439 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 13:27:03,219 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:03,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:03,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:03,738 INFO L124 PetriNetUnfolderBase]: 1901/2835 cut-off events. [2024-06-14 13:27:03,738 INFO L125 PetriNetUnfolderBase]: For 63473/63494 co-relation queries the response was YES. [2024-06-14 13:27:03,751 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18284 conditions, 2835 events. 1901/2835 cut-off events. For 63473/63494 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12936 event pairs, 509 based on Foata normal form. 15/2843 useless extension candidates. Maximal degree in co-relation 18223. Up to 2322 conditions per place. [2024-06-14 13:27:03,761 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 122 selfloop transitions, 69 changer transitions 0/194 dead transitions. [2024-06-14 13:27:03,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 194 transitions, 2245 flow [2024-06-14 13:27:03,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:03,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:03,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-14 13:27:03,764 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43597560975609756 [2024-06-14 13:27:03,765 INFO L175 Difference]: Start difference. First operand has 128 places, 149 transitions, 1439 flow. Second operand 8 states and 143 transitions. [2024-06-14 13:27:03,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 194 transitions, 2245 flow [2024-06-14 13:27:03,818 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 194 transitions, 2179 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:03,820 INFO L231 Difference]: Finished difference. Result has 132 places, 162 transitions, 1709 flow [2024-06-14 13:27:03,821 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1373, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1709, PETRI_PLACES=132, PETRI_TRANSITIONS=162} [2024-06-14 13:27:03,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 90 predicate places. [2024-06-14 13:27:03,821 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 162 transitions, 1709 flow [2024-06-14 13:27:03,821 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 13:27:03,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:03,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:03,822 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:27:03,822 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 13:27:03,822 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:03,822 INFO L85 PathProgramCache]: Analyzing trace with hash -817460328, now seen corresponding path program 5 times [2024-06-14 13:27:03,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:03,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946142103] [2024-06-14 13:27:03,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:03,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:03,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:04,605 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:04,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:04,606 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946142103] [2024-06-14 13:27:04,606 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946142103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:04,606 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:04,606 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:04,606 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290898181] [2024-06-14 13:27:04,606 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:04,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:04,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:04,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:04,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:04,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:04,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 162 transitions, 1709 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 13:27:04,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:04,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:04,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:05,276 INFO L124 PetriNetUnfolderBase]: 1951/2909 cut-off events. [2024-06-14 13:27:05,276 INFO L125 PetriNetUnfolderBase]: For 71439/71460 co-relation queries the response was YES. [2024-06-14 13:27:05,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19747 conditions, 2909 events. 1951/2909 cut-off events. For 71439/71460 co-relation queries the response was YES. Maximal size of possible extension queue 115. Compared 13310 event pairs, 514 based on Foata normal form. 15/2917 useless extension candidates. Maximal degree in co-relation 19683. Up to 2358 conditions per place. [2024-06-14 13:27:05,297 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 129 selfloop transitions, 68 changer transitions 0/200 dead transitions. [2024-06-14 13:27:05,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 200 transitions, 2539 flow [2024-06-14 13:27:05,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:05,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:05,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-14 13:27:05,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4481707317073171 [2024-06-14 13:27:05,299 INFO L175 Difference]: Start difference. First operand has 132 places, 162 transitions, 1709 flow. Second operand 8 states and 147 transitions. [2024-06-14 13:27:05,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 200 transitions, 2539 flow [2024-06-14 13:27:05,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 200 transitions, 2463 flow, removed 32 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:05,366 INFO L231 Difference]: Finished difference. Result has 138 places, 166 transitions, 1841 flow [2024-06-14 13:27:05,366 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=162, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=97, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1841, PETRI_PLACES=138, PETRI_TRANSITIONS=166} [2024-06-14 13:27:05,367 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 13:27:05,367 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 166 transitions, 1841 flow [2024-06-14 13:27:05,367 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 13:27:05,367 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:05,367 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:05,367 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:27:05,367 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 13:27:05,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:05,368 INFO L85 PathProgramCache]: Analyzing trace with hash 1040625405, now seen corresponding path program 3 times [2024-06-14 13:27:05,368 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:05,368 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885916337] [2024-06-14 13:27:05,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:05,368 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:05,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:06,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:06,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:06,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885916337] [2024-06-14 13:27:06,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885916337] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:06,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:06,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:06,309 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234188989] [2024-06-14 13:27:06,309 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:06,309 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:06,309 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:06,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:06,309 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:06,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:06,356 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 166 transitions, 1841 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 13:27:06,356 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:06,356 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:06,356 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:06,947 INFO L124 PetriNetUnfolderBase]: 1940/2890 cut-off events. [2024-06-14 13:27:06,947 INFO L125 PetriNetUnfolderBase]: For 74427/74451 co-relation queries the response was YES. [2024-06-14 13:27:06,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19902 conditions, 2890 events. 1940/2890 cut-off events. For 74427/74451 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13227 event pairs, 545 based on Foata normal form. 18/2903 useless extension candidates. Maximal degree in co-relation 19836. Up to 2788 conditions per place. [2024-06-14 13:27:06,969 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 157 selfloop transitions, 29 changer transitions 0/189 dead transitions. [2024-06-14 13:27:06,969 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 189 transitions, 2271 flow [2024-06-14 13:27:06,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:06,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:06,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:27:06,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:27:06,972 INFO L175 Difference]: Start difference. First operand has 138 places, 166 transitions, 1841 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:27:06,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 189 transitions, 2271 flow [2024-06-14 13:27:07,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 189 transitions, 2065 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:07,051 INFO L231 Difference]: Finished difference. Result has 141 places, 166 transitions, 1701 flow [2024-06-14 13:27:07,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1635, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1701, PETRI_PLACES=141, PETRI_TRANSITIONS=166} [2024-06-14 13:27:07,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 99 predicate places. [2024-06-14 13:27:07,052 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 166 transitions, 1701 flow [2024-06-14 13:27:07,052 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 13:27:07,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:07,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:07,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:27:07,053 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 13:27:07,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:07,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1040619608, now seen corresponding path program 6 times [2024-06-14 13:27:07,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:07,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760081268] [2024-06-14 13:27:07,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:07,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:07,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:07,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:07,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:07,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760081268] [2024-06-14 13:27:07,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760081268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:07,937 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:07,937 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:07,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492214249] [2024-06-14 13:27:07,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:07,938 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:07,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:07,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:07,938 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:08,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:08,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 166 transitions, 1701 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 13:27:08,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:08,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:08,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:08,535 INFO L124 PetriNetUnfolderBase]: 1930/2878 cut-off events. [2024-06-14 13:27:08,536 INFO L125 PetriNetUnfolderBase]: For 76583/76604 co-relation queries the response was YES. [2024-06-14 13:27:08,548 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19422 conditions, 2878 events. 1930/2878 cut-off events. For 76583/76604 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 13140 event pairs, 507 based on Foata normal form. 11/2882 useless extension candidates. Maximal degree in co-relation 19355. Up to 2343 conditions per place. [2024-06-14 13:27:08,557 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 123 selfloop transitions, 74 changer transitions 0/200 dead transitions. [2024-06-14 13:27:08,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 200 transitions, 2421 flow [2024-06-14 13:27:08,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:08,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:08,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-14 13:27:08,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:27:08,559 INFO L175 Difference]: Start difference. First operand has 141 places, 166 transitions, 1701 flow. Second operand 8 states and 144 transitions. [2024-06-14 13:27:08,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 200 transitions, 2421 flow [2024-06-14 13:27:08,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 200 transitions, 2359 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:08,622 INFO L231 Difference]: Finished difference. Result has 143 places, 169 transitions, 1841 flow [2024-06-14 13:27:08,623 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1639, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=166, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1841, PETRI_PLACES=143, PETRI_TRANSITIONS=169} [2024-06-14 13:27:08,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 101 predicate places. [2024-06-14 13:27:08,623 INFO L495 AbstractCegarLoop]: Abstraction has has 143 places, 169 transitions, 1841 flow [2024-06-14 13:27:08,623 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 13:27:08,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:08,624 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:08,624 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:27:08,624 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 13:27:08,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:08,624 INFO L85 PathProgramCache]: Analyzing trace with hash 2110295583, now seen corresponding path program 1 times [2024-06-14 13:27:08,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:08,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713282254] [2024-06-14 13:27:08,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:08,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:08,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:09,816 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:09,816 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:09,816 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713282254] [2024-06-14 13:27:09,816 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713282254] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:09,816 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:09,816 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:09,816 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973039104] [2024-06-14 13:27:09,817 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:09,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:09,817 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:09,817 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:09,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:09,924 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:27:09,924 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 143 places, 169 transitions, 1841 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 13:27:09,924 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:09,924 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:27:09,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:10,611 INFO L124 PetriNetUnfolderBase]: 1987/2988 cut-off events. [2024-06-14 13:27:10,611 INFO L125 PetriNetUnfolderBase]: For 89980/90021 co-relation queries the response was YES. [2024-06-14 13:27:10,625 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21024 conditions, 2988 events. 1987/2988 cut-off events. For 89980/90021 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13988 event pairs, 477 based on Foata normal form. 11/2939 useless extension candidates. Maximal degree in co-relation 20956. Up to 2700 conditions per place. [2024-06-14 13:27:10,636 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 153 selfloop transitions, 45 changer transitions 0/233 dead transitions. [2024-06-14 13:27:10,636 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 233 transitions, 2665 flow [2024-06-14 13:27:10,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:10,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:10,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:27:10,638 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:27:10,638 INFO L175 Difference]: Start difference. First operand has 143 places, 169 transitions, 1841 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:27:10,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 233 transitions, 2665 flow [2024-06-14 13:27:10,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 233 transitions, 2509 flow, removed 19 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:10,720 INFO L231 Difference]: Finished difference. Result has 151 places, 196 transitions, 2140 flow [2024-06-14 13:27:10,721 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1699, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2140, PETRI_PLACES=151, PETRI_TRANSITIONS=196} [2024-06-14 13:27:10,721 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 109 predicate places. [2024-06-14 13:27:10,721 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 196 transitions, 2140 flow [2024-06-14 13:27:10,721 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 13:27:10,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:10,721 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:10,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:27:10,722 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:10,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:10,722 INFO L85 PathProgramCache]: Analyzing trace with hash -640642789, now seen corresponding path program 2 times [2024-06-14 13:27:10,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:10,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336069143] [2024-06-14 13:27:10,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:10,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:10,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:11,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:11,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:11,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336069143] [2024-06-14 13:27:11,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336069143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:11,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:11,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:11,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529892601] [2024-06-14 13:27:11,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:11,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:11,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:11,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:11,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:11,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:27:11,802 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 196 transitions, 2140 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 13:27:11,802 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:11,802 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:27:11,802 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:12,606 INFO L124 PetriNetUnfolderBase]: 1996/3005 cut-off events. [2024-06-14 13:27:12,606 INFO L125 PetriNetUnfolderBase]: For 95919/95973 co-relation queries the response was YES. [2024-06-14 13:27:12,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21397 conditions, 3005 events. 1996/3005 cut-off events. For 95919/95973 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 14125 event pairs, 342 based on Foata normal form. 25/2968 useless extension candidates. Maximal degree in co-relation 21325. Up to 2651 conditions per place. [2024-06-14 13:27:12,629 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 145 selfloop transitions, 49 changer transitions 0/229 dead transitions. [2024-06-14 13:27:12,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 229 transitions, 2660 flow [2024-06-14 13:27:12,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:12,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:12,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:27:12,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:27:12,631 INFO L175 Difference]: Start difference. First operand has 151 places, 196 transitions, 2140 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:27:12,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 229 transitions, 2660 flow [2024-06-14 13:27:12,698 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 229 transitions, 2591 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:27:12,701 INFO L231 Difference]: Finished difference. Result has 156 places, 198 transitions, 2217 flow [2024-06-14 13:27:12,701 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2071, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2217, PETRI_PLACES=156, PETRI_TRANSITIONS=198} [2024-06-14 13:27:12,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 114 predicate places. [2024-06-14 13:27:12,702 INFO L495 AbstractCegarLoop]: Abstraction has has 156 places, 198 transitions, 2217 flow [2024-06-14 13:27:12,702 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 13:27:12,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:12,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:12,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:27:12,703 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 13:27:12,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:12,703 INFO L85 PathProgramCache]: Analyzing trace with hash -643321189, now seen corresponding path program 3 times [2024-06-14 13:27:12,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:12,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [128841775] [2024-06-14 13:27:12,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:12,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:12,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:13,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:13,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [128841775] [2024-06-14 13:27:13,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [128841775] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:13,783 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:13,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:13,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775451385] [2024-06-14 13:27:13,783 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:13,783 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:13,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:13,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:13,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:13,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:27:13,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 156 places, 198 transitions, 2217 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 13:27:13,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:13,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:27:13,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:14,565 INFO L124 PetriNetUnfolderBase]: 2006/3027 cut-off events. [2024-06-14 13:27:14,565 INFO L125 PetriNetUnfolderBase]: For 103196/103257 co-relation queries the response was YES. [2024-06-14 13:27:14,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21903 conditions, 3027 events. 2006/3027 cut-off events. For 103196/103257 co-relation queries the response was YES. Maximal size of possible extension queue 123. Compared 14290 event pairs, 454 based on Foata normal form. 16/2984 useless extension candidates. Maximal degree in co-relation 21830. Up to 2695 conditions per place. [2024-06-14 13:27:14,594 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 143 selfloop transitions, 53 changer transitions 0/231 dead transitions. [2024-06-14 13:27:14,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 231 transitions, 2747 flow [2024-06-14 13:27:14,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:14,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:14,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:27:14,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:27:14,596 INFO L175 Difference]: Start difference. First operand has 156 places, 198 transitions, 2217 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:27:14,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 231 transitions, 2747 flow [2024-06-14 13:27:14,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 231 transitions, 2617 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:14,690 INFO L231 Difference]: Finished difference. Result has 158 places, 200 transitions, 2245 flow [2024-06-14 13:27:14,690 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2091, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2245, PETRI_PLACES=158, PETRI_TRANSITIONS=200} [2024-06-14 13:27:14,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 116 predicate places. [2024-06-14 13:27:14,691 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 200 transitions, 2245 flow [2024-06-14 13:27:14,691 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 13:27:14,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:14,691 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:14,691 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:27:14,692 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 13:27:14,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:14,692 INFO L85 PathProgramCache]: Analyzing trace with hash -643321065, now seen corresponding path program 1 times [2024-06-14 13:27:14,692 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:14,692 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324996350] [2024-06-14 13:27:14,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:14,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:14,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:15,647 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:15,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:15,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324996350] [2024-06-14 13:27:15,648 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [324996350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:15,648 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:15,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:15,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703139411] [2024-06-14 13:27:15,648 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:15,648 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:15,648 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:15,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:15,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:15,717 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:15,717 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 200 transitions, 2245 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 13:27:15,718 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:15,718 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:15,718 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:16,391 INFO L124 PetriNetUnfolderBase]: 2108/3152 cut-off events. [2024-06-14 13:27:16,391 INFO L125 PetriNetUnfolderBase]: For 96405/96409 co-relation queries the response was YES. [2024-06-14 13:27:16,408 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22194 conditions, 3152 events. 2108/3152 cut-off events. For 96405/96409 co-relation queries the response was YES. Maximal size of possible extension queue 129. Compared 14631 event pairs, 495 based on Foata normal form. 6/3155 useless extension candidates. Maximal degree in co-relation 22120. Up to 2966 conditions per place. [2024-06-14 13:27:16,421 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 195 selfloop transitions, 33 changer transitions 0/231 dead transitions. [2024-06-14 13:27:16,421 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 231 transitions, 2803 flow [2024-06-14 13:27:16,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:16,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:16,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:27:16,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 13:27:16,422 INFO L175 Difference]: Start difference. First operand has 158 places, 200 transitions, 2245 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:27:16,422 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 231 transitions, 2803 flow [2024-06-14 13:27:16,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 231 transitions, 2661 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:16,530 INFO L231 Difference]: Finished difference. Result has 160 places, 200 transitions, 2181 flow [2024-06-14 13:27:16,530 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2103, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2181, PETRI_PLACES=160, PETRI_TRANSITIONS=200} [2024-06-14 13:27:16,530 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-14 13:27:16,531 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 200 transitions, 2181 flow [2024-06-14 13:27:16,531 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 13:27:16,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:16,531 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:16,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:27:16,531 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 13:27:16,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:16,532 INFO L85 PathProgramCache]: Analyzing trace with hash -525048811, now seen corresponding path program 1 times [2024-06-14 13:27:16,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:16,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1372081417] [2024-06-14 13:27:16,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:16,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:16,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:17,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:17,483 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:17,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1372081417] [2024-06-14 13:27:17,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1372081417] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:17,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:17,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:17,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793296800] [2024-06-14 13:27:17,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:17,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:17,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:17,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:17,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:17,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:17,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 200 transitions, 2181 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 13:27:17,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:17,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:17,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:18,315 INFO L124 PetriNetUnfolderBase]: 2200/3306 cut-off events. [2024-06-14 13:27:18,316 INFO L125 PetriNetUnfolderBase]: For 111728/111730 co-relation queries the response was YES. [2024-06-14 13:27:18,330 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22952 conditions, 3306 events. 2200/3306 cut-off events. For 111728/111730 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 15638 event pairs, 508 based on Foata normal form. 26/3329 useless extension candidates. Maximal degree in co-relation 22877. Up to 2841 conditions per place. [2024-06-14 13:27:18,340 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 184 selfloop transitions, 52 changer transitions 0/239 dead transitions. [2024-06-14 13:27:18,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 239 transitions, 2819 flow [2024-06-14 13:27:18,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:18,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:18,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:27:18,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:27:18,342 INFO L175 Difference]: Start difference. First operand has 160 places, 200 transitions, 2181 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:27:18,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 239 transitions, 2819 flow [2024-06-14 13:27:18,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 239 transitions, 2725 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:18,419 INFO L231 Difference]: Finished difference. Result has 163 places, 202 transitions, 2234 flow [2024-06-14 13:27:18,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=200, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2234, PETRI_PLACES=163, PETRI_TRANSITIONS=202} [2024-06-14 13:27:18,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 121 predicate places. [2024-06-14 13:27:18,420 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 202 transitions, 2234 flow [2024-06-14 13:27:18,420 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 13:27:18,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:18,420 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:18,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:27:18,420 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 13:27:18,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:18,420 INFO L85 PathProgramCache]: Analyzing trace with hash -525233509, now seen corresponding path program 4 times [2024-06-14 13:27:18,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:18,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483628050] [2024-06-14 13:27:18,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:18,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:18,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:19,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:19,532 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:19,532 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483628050] [2024-06-14 13:27:19,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483628050] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:19,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:19,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:19,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1214411931] [2024-06-14 13:27:19,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:19,532 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:19,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:19,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:19,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:19,624 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:27:19,624 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 202 transitions, 2234 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 13:27:19,624 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:19,624 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:27:19,624 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:20,324 INFO L124 PetriNetUnfolderBase]: 2102/3193 cut-off events. [2024-06-14 13:27:20,324 INFO L125 PetriNetUnfolderBase]: For 117392/117456 co-relation queries the response was YES. [2024-06-14 13:27:20,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23015 conditions, 3193 events. 2102/3193 cut-off events. For 117392/117456 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 15401 event pairs, 473 based on Foata normal form. 15/3141 useless extension candidates. Maximal degree in co-relation 22939. Up to 2813 conditions per place. [2024-06-14 13:27:20,352 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 137 selfloop transitions, 59 changer transitions 0/232 dead transitions. [2024-06-14 13:27:20,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 170 places, 232 transitions, 2750 flow [2024-06-14 13:27:20,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:20,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:20,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-14 13:27:20,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42378048780487804 [2024-06-14 13:27:20,353 INFO L175 Difference]: Start difference. First operand has 163 places, 202 transitions, 2234 flow. Second operand 8 states and 139 transitions. [2024-06-14 13:27:20,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 170 places, 232 transitions, 2750 flow [2024-06-14 13:27:20,441 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 232 transitions, 2637 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:20,444 INFO L231 Difference]: Finished difference. Result has 164 places, 204 transitions, 2289 flow [2024-06-14 13:27:20,444 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2121, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2289, PETRI_PLACES=164, PETRI_TRANSITIONS=204} [2024-06-14 13:27:20,444 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 122 predicate places. [2024-06-14 13:27:20,444 INFO L495 AbstractCegarLoop]: Abstraction has has 164 places, 204 transitions, 2289 flow [2024-06-14 13:27:20,445 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 13:27:20,445 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:20,445 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:20,445 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:27:20,445 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 13:27:20,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:20,446 INFO L85 PathProgramCache]: Analyzing trace with hash 664716577, now seen corresponding path program 2 times [2024-06-14 13:27:20,446 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:20,446 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966093584] [2024-06-14 13:27:20,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:20,446 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:20,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:21,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:21,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966093584] [2024-06-14 13:27:21,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966093584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:21,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:21,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:21,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626507976] [2024-06-14 13:27:21,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:21,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:21,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:21,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:21,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:21,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:21,592 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 204 transitions, 2289 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 13:27:21,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:21,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:21,592 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:22,331 INFO L124 PetriNetUnfolderBase]: 2242/3372 cut-off events. [2024-06-14 13:27:22,332 INFO L125 PetriNetUnfolderBase]: For 118569/118599 co-relation queries the response was YES. [2024-06-14 13:27:22,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24082 conditions, 3372 events. 2242/3372 cut-off events. For 118569/118599 co-relation queries the response was YES. Maximal size of possible extension queue 144. Compared 16080 event pairs, 534 based on Foata normal form. 24/3389 useless extension candidates. Maximal degree in co-relation 24005. Up to 3204 conditions per place. [2024-06-14 13:27:22,423 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 194 selfloop transitions, 43 changer transitions 0/240 dead transitions. [2024-06-14 13:27:22,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 240 transitions, 2905 flow [2024-06-14 13:27:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:27:22,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:27:22,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 156 transitions. [2024-06-14 13:27:22,425 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3804878048780488 [2024-06-14 13:27:22,425 INFO L175 Difference]: Start difference. First operand has 164 places, 204 transitions, 2289 flow. Second operand 10 states and 156 transitions. [2024-06-14 13:27:22,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 240 transitions, 2905 flow [2024-06-14 13:27:22,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 240 transitions, 2757 flow, removed 17 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:22,518 INFO L231 Difference]: Finished difference. Result has 168 places, 206 transitions, 2272 flow [2024-06-14 13:27:22,518 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2141, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=2272, PETRI_PLACES=168, PETRI_TRANSITIONS=206} [2024-06-14 13:27:22,519 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 126 predicate places. [2024-06-14 13:27:22,519 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 206 transitions, 2272 flow [2024-06-14 13:27:22,519 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 13:27:22,519 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:22,519 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:22,519 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:27:22,520 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 13:27:22,520 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:22,520 INFO L85 PathProgramCache]: Analyzing trace with hash 665013247, now seen corresponding path program 3 times [2024-06-14 13:27:22,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:22,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618536215] [2024-06-14 13:27:22,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:22,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:22,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:23,578 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 13:27:23,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:23,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618536215] [2024-06-14 13:27:23,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618536215] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:23,578 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:23,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:23,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528861924] [2024-06-14 13:27:23,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:23,579 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:23,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:23,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:23,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:23,673 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:23,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 206 transitions, 2272 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 13:27:23,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:23,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:23,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:24,333 INFO L124 PetriNetUnfolderBase]: 2259/3399 cut-off events. [2024-06-14 13:27:24,333 INFO L125 PetriNetUnfolderBase]: For 124855/124885 co-relation queries the response was YES. [2024-06-14 13:27:24,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24474 conditions, 3399 events. 2259/3399 cut-off events. For 124855/124885 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16255 event pairs, 490 based on Foata normal form. 24/3416 useless extension candidates. Maximal degree in co-relation 24396. Up to 3148 conditions per place. [2024-06-14 13:27:24,363 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 192 selfloop transitions, 49 changer transitions 0/244 dead transitions. [2024-06-14 13:27:24,363 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 244 transitions, 3072 flow [2024-06-14 13:27:24,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:24,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:24,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:27:24,364 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 13:27:24,364 INFO L175 Difference]: Start difference. First operand has 168 places, 206 transitions, 2272 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:27:24,364 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 244 transitions, 3072 flow [2024-06-14 13:27:24,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 244 transitions, 2959 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-14 13:27:24,475 INFO L231 Difference]: Finished difference. Result has 170 places, 211 transitions, 2370 flow [2024-06-14 13:27:24,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2159, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=206, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2370, PETRI_PLACES=170, PETRI_TRANSITIONS=211} [2024-06-14 13:27:24,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 128 predicate places. [2024-06-14 13:27:24,475 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 211 transitions, 2370 flow [2024-06-14 13:27:24,475 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 13:27:24,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:24,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:24,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:27:24,476 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 13:27:24,476 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:24,476 INFO L85 PathProgramCache]: Analyzing trace with hash -410857977, now seen corresponding path program 4 times [2024-06-14 13:27:24,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:24,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104127782] [2024-06-14 13:27:24,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:24,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:24,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:25,599 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:25,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:25,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104127782] [2024-06-14 13:27:25,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104127782] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:25,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:25,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:25,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744737060] [2024-06-14 13:27:25,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:25,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:25,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:25,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:25,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:25,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:25,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 211 transitions, 2370 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 13:27:25,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:25,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:25,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:26,461 INFO L124 PetriNetUnfolderBase]: 2316/3501 cut-off events. [2024-06-14 13:27:26,461 INFO L125 PetriNetUnfolderBase]: For 141660/141684 co-relation queries the response was YES. [2024-06-14 13:27:26,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25045 conditions, 3501 events. 2316/3501 cut-off events. For 141660/141684 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16972 event pairs, 533 based on Foata normal form. 37/3524 useless extension candidates. Maximal degree in co-relation 24965. Up to 2926 conditions per place. [2024-06-14 13:27:26,493 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 178 selfloop transitions, 71 changer transitions 0/252 dead transitions. [2024-06-14 13:27:26,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 252 transitions, 3048 flow [2024-06-14 13:27:26,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:26,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:26,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:27:26,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 13:27:26,495 INFO L175 Difference]: Start difference. First operand has 170 places, 211 transitions, 2370 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:27:26,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 252 transitions, 3048 flow [2024-06-14 13:27:26,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 252 transitions, 2906 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:26,626 INFO L231 Difference]: Finished difference. Result has 177 places, 216 transitions, 2471 flow [2024-06-14 13:27:26,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2228, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2471, PETRI_PLACES=177, PETRI_TRANSITIONS=216} [2024-06-14 13:27:26,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 135 predicate places. [2024-06-14 13:27:26,627 INFO L495 AbstractCegarLoop]: Abstraction has has 177 places, 216 transitions, 2471 flow [2024-06-14 13:27:26,627 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 13:27:26,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:26,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:26,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:27:26,627 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 13:27:26,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:26,628 INFO L85 PathProgramCache]: Analyzing trace with hash 656435609, now seen corresponding path program 1 times [2024-06-14 13:27:26,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:26,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1485355498] [2024-06-14 13:27:26,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:26,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:26,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:27,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:27,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:27,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1485355498] [2024-06-14 13:27:27,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1485355498] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:27,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:27,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:27,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827460121] [2024-06-14 13:27:27,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:27,632 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:27,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:27,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:27,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:27,708 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:27,709 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 177 places, 216 transitions, 2471 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 13:27:27,709 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:27,709 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:27,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:28,414 INFO L124 PetriNetUnfolderBase]: 2306/3487 cut-off events. [2024-06-14 13:27:28,414 INFO L125 PetriNetUnfolderBase]: For 140690/140714 co-relation queries the response was YES. [2024-06-14 13:27:28,434 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25482 conditions, 3487 events. 2306/3487 cut-off events. For 140690/140714 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 16886 event pairs, 509 based on Foata normal form. 13/3486 useless extension candidates. Maximal degree in co-relation 25397. Up to 2893 conditions per place. [2024-06-14 13:27:28,448 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 159 selfloop transitions, 85 changer transitions 0/247 dead transitions. [2024-06-14 13:27:28,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 247 transitions, 3057 flow [2024-06-14 13:27:28,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:28,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:28,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:27:28,450 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-14 13:27:28,450 INFO L175 Difference]: Start difference. First operand has 177 places, 216 transitions, 2471 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:27:28,450 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 247 transitions, 3057 flow [2024-06-14 13:27:28,589 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 247 transitions, 2846 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 13:27:28,593 INFO L231 Difference]: Finished difference. Result has 178 places, 216 transitions, 2438 flow [2024-06-14 13:27:28,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2260, PETRI_DIFFERENCE_MINUEND_PLACES=169, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2438, PETRI_PLACES=178, PETRI_TRANSITIONS=216} [2024-06-14 13:27:28,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-14 13:27:28,594 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 216 transitions, 2438 flow [2024-06-14 13:27:28,594 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 13:27:28,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:28,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:27:28,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:27:28,594 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 13:27:28,594 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:28,594 INFO L85 PathProgramCache]: Analyzing trace with hash -2100534629, now seen corresponding path program 5 times [2024-06-14 13:27:28,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:28,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805656557] [2024-06-14 13:27:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:28,595 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:29,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:29,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:29,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805656557] [2024-06-14 13:27:29,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805656557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:29,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:29,633 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:29,633 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815783455] [2024-06-14 13:27:29,633 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:29,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:29,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:29,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:29,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:29,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:27:29,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 216 transitions, 2438 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 13:27:29,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:29,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:27:29,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:30,407 INFO L124 PetriNetUnfolderBase]: 2164/3310 cut-off events. [2024-06-14 13:27:30,407 INFO L125 PetriNetUnfolderBase]: For 144141/144231 co-relation queries the response was YES. [2024-06-14 13:27:30,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24269 conditions, 3310 events. 2164/3310 cut-off events. For 144141/144231 co-relation queries the response was YES. Maximal size of possible extension queue 145. Compared 16265 event pairs, 482 based on Foata normal form. 20/3252 useless extension candidates. Maximal degree in co-relation 24184. Up to 2875 conditions per place. [2024-06-14 13:27:30,440 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 131 selfloop transitions, 70 changer transitions 0/244 dead transitions. [2024-06-14 13:27:30,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 244 transitions, 2962 flow [2024-06-14 13:27:30,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:27:30,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:27:30,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:27:30,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:27:30,441 INFO L175 Difference]: Start difference. First operand has 178 places, 216 transitions, 2438 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:27:30,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 244 transitions, 2962 flow [2024-06-14 13:27:30,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 244 transitions, 2779 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-14 13:27:30,572 INFO L231 Difference]: Finished difference. Result has 178 places, 218 transitions, 2449 flow [2024-06-14 13:27:30,572 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2255, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2449, PETRI_PLACES=178, PETRI_TRANSITIONS=218} [2024-06-14 13:27:30,572 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 136 predicate places. [2024-06-14 13:27:30,573 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 218 transitions, 2449 flow [2024-06-14 13:27:30,573 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 13:27:30,573 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:30,573 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 13:27:30,573 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:27:30,573 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 13:27:30,574 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:30,574 INFO L85 PathProgramCache]: Analyzing trace with hash 590052989, now seen corresponding path program 1 times [2024-06-14 13:27:30,574 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:30,574 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [786185644] [2024-06-14 13:27:30,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:30,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:30,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:31,660 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 13:27:31,660 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:31,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [786185644] [2024-06-14 13:27:31,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [786185644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:31,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:31,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:31,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017094728] [2024-06-14 13:27:31,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:31,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:31,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:31,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:31,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:31,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:31,787 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 218 transitions, 2449 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 13:27:31,787 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:31,787 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:31,787 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:32,561 INFO L124 PetriNetUnfolderBase]: 2310/3490 cut-off events. [2024-06-14 13:27:32,561 INFO L125 PetriNetUnfolderBase]: For 142168/142172 co-relation queries the response was YES. [2024-06-14 13:27:32,581 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25335 conditions, 3490 events. 2310/3490 cut-off events. For 142168/142172 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 16836 event pairs, 360 based on Foata normal form. 8/3495 useless extension candidates. Maximal degree in co-relation 25249. Up to 3246 conditions per place. [2024-06-14 13:27:32,595 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 230 selfloop transitions, 29 changer transitions 0/262 dead transitions. [2024-06-14 13:27:32,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 262 transitions, 3193 flow [2024-06-14 13:27:32,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:32,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:32,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:27:32,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 13:27:32,596 INFO L175 Difference]: Start difference. First operand has 178 places, 218 transitions, 2449 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:27:32,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 262 transitions, 3193 flow [2024-06-14 13:27:32,728 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 262 transitions, 3019 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:27:32,731 INFO L231 Difference]: Finished difference. Result has 183 places, 226 transitions, 2478 flow [2024-06-14 13:27:32,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2275, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2478, PETRI_PLACES=183, PETRI_TRANSITIONS=226} [2024-06-14 13:27:32,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 13:27:32,731 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 226 transitions, 2478 flow [2024-06-14 13:27:32,731 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 13:27:32,731 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:32,731 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 13:27:32,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:27:32,732 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 13:27:32,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:32,732 INFO L85 PathProgramCache]: Analyzing trace with hash 1996559801, now seen corresponding path program 2 times [2024-06-14 13:27:32,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:32,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637580893] [2024-06-14 13:27:32,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:32,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:32,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:33,822 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 13:27:33,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:33,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637580893] [2024-06-14 13:27:33,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637580893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:33,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:33,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:33,822 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712313593] [2024-06-14 13:27:33,822 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:33,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:33,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:33,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:33,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:33,909 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:33,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 226 transitions, 2478 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 13:27:33,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:33,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:33,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:34,766 INFO L124 PetriNetUnfolderBase]: 2327/3517 cut-off events. [2024-06-14 13:27:34,766 INFO L125 PetriNetUnfolderBase]: For 149288/149292 co-relation queries the response was YES. [2024-06-14 13:27:34,785 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25718 conditions, 3517 events. 2327/3517 cut-off events. For 149288/149292 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 17080 event pairs, 486 based on Foata normal form. 8/3522 useless extension candidates. Maximal degree in co-relation 25629. Up to 3308 conditions per place. [2024-06-14 13:27:34,797 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 226 selfloop transitions, 35 changer transitions 0/264 dead transitions. [2024-06-14 13:27:34,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 264 transitions, 3160 flow [2024-06-14 13:27:34,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:34,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:34,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:27:34,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 13:27:34,798 INFO L175 Difference]: Start difference. First operand has 183 places, 226 transitions, 2478 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:27:34,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 264 transitions, 3160 flow [2024-06-14 13:27:34,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 264 transitions, 3059 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-14 13:27:34,987 INFO L231 Difference]: Finished difference. Result has 188 places, 228 transitions, 2503 flow [2024-06-14 13:27:34,987 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2377, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=226, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2503, PETRI_PLACES=188, PETRI_TRANSITIONS=228} [2024-06-14 13:27:34,987 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 146 predicate places. [2024-06-14 13:27:34,987 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 228 transitions, 2503 flow [2024-06-14 13:27:34,988 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 13:27:34,988 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:34,988 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 13:27:34,988 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:27:34,988 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 13:27:34,988 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:34,989 INFO L85 PathProgramCache]: Analyzing trace with hash 1703059289, now seen corresponding path program 3 times [2024-06-14 13:27:34,989 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:34,989 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795049157] [2024-06-14 13:27:34,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:34,989 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:35,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:36,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:36,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:36,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795049157] [2024-06-14 13:27:36,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795049157] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:36,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:36,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:36,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050256530] [2024-06-14 13:27:36,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:36,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:36,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:36,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:36,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:36,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:36,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 228 transitions, 2503 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 13:27:36,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:36,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:36,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:37,029 INFO L124 PetriNetUnfolderBase]: 2344/3544 cut-off events. [2024-06-14 13:27:37,030 INFO L125 PetriNetUnfolderBase]: For 158154/158158 co-relation queries the response was YES. [2024-06-14 13:27:37,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26162 conditions, 3544 events. 2344/3544 cut-off events. For 158154/158158 co-relation queries the response was YES. Maximal size of possible extension queue 161. Compared 17247 event pairs, 484 based on Foata normal form. 8/3549 useless extension candidates. Maximal degree in co-relation 26071. Up to 3289 conditions per place. [2024-06-14 13:27:37,067 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 228 selfloop transitions, 37 changer transitions 0/268 dead transitions. [2024-06-14 13:27:37,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 268 transitions, 3225 flow [2024-06-14 13:27:37,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:37,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:37,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:27:37,068 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 13:27:37,068 INFO L175 Difference]: Start difference. First operand has 188 places, 228 transitions, 2503 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:27:37,068 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 268 transitions, 3225 flow [2024-06-14 13:27:37,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 268 transitions, 3119 flow, removed 20 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:37,231 INFO L231 Difference]: Finished difference. Result has 191 places, 232 transitions, 2570 flow [2024-06-14 13:27:37,231 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2397, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=192, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2570, PETRI_PLACES=191, PETRI_TRANSITIONS=232} [2024-06-14 13:27:37,232 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-14 13:27:37,232 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 232 transitions, 2570 flow [2024-06-14 13:27:37,232 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 13:27:37,232 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:37,232 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 13:27:37,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:27:37,232 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 13:27:37,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:37,233 INFO L85 PathProgramCache]: Analyzing trace with hash 1074528085, now seen corresponding path program 1 times [2024-06-14 13:27:37,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:37,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497128342] [2024-06-14 13:27:37,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:37,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:37,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:38,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:38,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:38,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497128342] [2024-06-14 13:27:38,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497128342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:38,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:38,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:38,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929701222] [2024-06-14 13:27:38,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:38,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:38,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:38,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:38,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:38,165 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:38,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 232 transitions, 2570 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 13:27:38,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:38,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:38,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:39,001 INFO L124 PetriNetUnfolderBase]: 2436/3698 cut-off events. [2024-06-14 13:27:39,001 INFO L125 PetriNetUnfolderBase]: For 183914/183916 co-relation queries the response was YES. [2024-06-14 13:27:39,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27330 conditions, 3698 events. 2436/3698 cut-off events. For 183914/183916 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 18311 event pairs, 497 based on Foata normal form. 26/3721 useless extension candidates. Maximal degree in co-relation 27237. Up to 3215 conditions per place. [2024-06-14 13:27:39,041 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 216 selfloop transitions, 52 changer transitions 0/271 dead transitions. [2024-06-14 13:27:39,042 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 199 places, 271 transitions, 3294 flow [2024-06-14 13:27:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:39,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:39,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:27:39,043 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 13:27:39,043 INFO L175 Difference]: Start difference. First operand has 191 places, 232 transitions, 2570 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:27:39,043 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 199 places, 271 transitions, 3294 flow [2024-06-14 13:27:39,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 271 transitions, 3187 flow, removed 33 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:39,211 INFO L231 Difference]: Finished difference. Result has 195 places, 234 transitions, 2632 flow [2024-06-14 13:27:39,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2463, PETRI_DIFFERENCE_MINUEND_PLACES=186, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=232, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2632, PETRI_PLACES=195, PETRI_TRANSITIONS=234} [2024-06-14 13:27:39,212 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-14 13:27:39,212 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 234 transitions, 2632 flow [2024-06-14 13:27:39,212 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 13:27:39,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:39,212 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 13:27:39,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:27:39,213 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 13:27:39,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:39,213 INFO L85 PathProgramCache]: Analyzing trace with hash 903356677, now seen corresponding path program 2 times [2024-06-14 13:27:39,213 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:39,213 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052978055] [2024-06-14 13:27:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:39,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:39,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:40,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:40,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:40,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052978055] [2024-06-14 13:27:40,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1052978055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:40,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:40,054 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:40,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798102512] [2024-06-14 13:27:40,054 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:40,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:40,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:40,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:40,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:40,107 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:40,107 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 234 transitions, 2632 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 13:27:40,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:40,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:40,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:40,943 INFO L124 PetriNetUnfolderBase]: 2580/3938 cut-off events. [2024-06-14 13:27:40,943 INFO L125 PetriNetUnfolderBase]: For 203202/203204 co-relation queries the response was YES. [2024-06-14 13:27:40,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29788 conditions, 3938 events. 2580/3938 cut-off events. For 203202/203204 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 19998 event pairs, 527 based on Foata normal form. 18/3953 useless extension candidates. Maximal degree in co-relation 29693. Up to 3059 conditions per place. [2024-06-14 13:27:40,987 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 222 selfloop transitions, 54 changer transitions 0/279 dead transitions. [2024-06-14 13:27:40,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 203 places, 279 transitions, 3590 flow [2024-06-14 13:27:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:40,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:40,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:27:40,988 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:27:40,988 INFO L175 Difference]: Start difference. First operand has 195 places, 234 transitions, 2632 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:27:40,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 203 places, 279 transitions, 3590 flow [2024-06-14 13:27:41,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 279 transitions, 3453 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:41,223 INFO L231 Difference]: Finished difference. Result has 197 places, 236 transitions, 2671 flow [2024-06-14 13:27:41,224 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=234, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=181, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2671, PETRI_PLACES=197, PETRI_TRANSITIONS=236} [2024-06-14 13:27:41,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 155 predicate places. [2024-06-14 13:27:41,224 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 236 transitions, 2671 flow [2024-06-14 13:27:41,224 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 13:27:41,225 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:41,225 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 13:27:41,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:27:41,225 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 13:27:41,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:41,225 INFO L85 PathProgramCache]: Analyzing trace with hash 897634945, now seen corresponding path program 4 times [2024-06-14 13:27:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713944316] [2024-06-14 13:27:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:41,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:42,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:42,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:42,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713944316] [2024-06-14 13:27:42,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713944316] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:42,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:42,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:42,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015656899] [2024-06-14 13:27:42,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:42,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:42,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:42,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:42,394 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:42,394 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 236 transitions, 2671 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 13:27:42,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:42,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:42,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:43,286 INFO L124 PetriNetUnfolderBase]: 2572/3926 cut-off events. [2024-06-14 13:27:43,286 INFO L125 PetriNetUnfolderBase]: For 196972/196974 co-relation queries the response was YES. [2024-06-14 13:27:43,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29540 conditions, 3926 events. 2572/3926 cut-off events. For 196972/196974 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 19964 event pairs, 556 based on Foata normal form. 6/3929 useless extension candidates. Maximal degree in co-relation 29444. Up to 3563 conditions per place. [2024-06-14 13:27:43,327 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 51 changer transitions 0/271 dead transitions. [2024-06-14 13:27:43,328 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 205 places, 271 transitions, 3367 flow [2024-06-14 13:27:43,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:43,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:43,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:27:43,329 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:27:43,329 INFO L175 Difference]: Start difference. First operand has 197 places, 236 transitions, 2671 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:27:43,329 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 205 places, 271 transitions, 3367 flow [2024-06-14 13:27:43,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 200 places, 271 transitions, 3278 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:43,543 INFO L231 Difference]: Finished difference. Result has 201 places, 238 transitions, 2753 flow [2024-06-14 13:27:43,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2584, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=236, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2753, PETRI_PLACES=201, PETRI_TRANSITIONS=238} [2024-06-14 13:27:43,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 159 predicate places. [2024-06-14 13:27:43,544 INFO L495 AbstractCegarLoop]: Abstraction has has 201 places, 238 transitions, 2753 flow [2024-06-14 13:27:43,545 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 13:27:43,545 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:43,545 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 13:27:43,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:27:43,545 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 13:27:43,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:43,545 INFO L85 PathProgramCache]: Analyzing trace with hash 897631225, now seen corresponding path program 5 times [2024-06-14 13:27:43,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:43,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265905731] [2024-06-14 13:27:43,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:43,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:43,559 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:44,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:44,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:44,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265905731] [2024-06-14 13:27:44,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265905731] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:44,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:44,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:44,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497892509] [2024-06-14 13:27:44,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:44,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:44,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:44,607 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:44,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:44,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:44,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 201 places, 238 transitions, 2753 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 13:27:44,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:44,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:44,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:45,604 INFO L124 PetriNetUnfolderBase]: 2589/3953 cut-off events. [2024-06-14 13:27:45,604 INFO L125 PetriNetUnfolderBase]: For 206037/206039 co-relation queries the response was YES. [2024-06-14 13:27:45,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30095 conditions, 3953 events. 2589/3953 cut-off events. For 206037/206039 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20132 event pairs, 554 based on Foata normal form. 6/3956 useless extension candidates. Maximal degree in co-relation 29997. Up to 3411 conditions per place. [2024-06-14 13:27:45,650 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 220 selfloop transitions, 56 changer transitions 0/279 dead transitions. [2024-06-14 13:27:45,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 209 places, 279 transitions, 3535 flow [2024-06-14 13:27:45,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:45,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:45,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:27:45,651 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:27:45,652 INFO L175 Difference]: Start difference. First operand has 201 places, 238 transitions, 2753 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:27:45,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 209 places, 279 transitions, 3535 flow [2024-06-14 13:27:45,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 279 transitions, 3386 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:45,976 INFO L231 Difference]: Finished difference. Result has 204 places, 242 transitions, 2836 flow [2024-06-14 13:27:45,976 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2604, PETRI_DIFFERENCE_MINUEND_PLACES=194, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2836, PETRI_PLACES=204, PETRI_TRANSITIONS=242} [2024-06-14 13:27:45,976 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 162 predicate places. [2024-06-14 13:27:45,977 INFO L495 AbstractCegarLoop]: Abstraction has has 204 places, 242 transitions, 2836 flow [2024-06-14 13:27:45,977 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 13:27:45,977 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:45,977 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 13:27:45,977 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:27:45,977 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:27:45,978 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:45,978 INFO L85 PathProgramCache]: Analyzing trace with hash -940125740, now seen corresponding path program 1 times [2024-06-14 13:27:45,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:45,978 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714142873] [2024-06-14 13:27:45,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:45,978 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:45,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:46,776 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 13:27:46,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:46,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714142873] [2024-06-14 13:27:46,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714142873] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:46,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:46,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:27:46,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596187315] [2024-06-14 13:27:46,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:46,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:27:46,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:46,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:27:46,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:27:46,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:46,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 204 places, 242 transitions, 2836 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:46,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:46,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:46,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:47,767 INFO L124 PetriNetUnfolderBase]: 2604/3972 cut-off events. [2024-06-14 13:27:47,767 INFO L125 PetriNetUnfolderBase]: For 213320/213324 co-relation queries the response was YES. [2024-06-14 13:27:47,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30539 conditions, 3972 events. 2604/3972 cut-off events. For 213320/213324 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 20246 event pairs, 571 based on Foata normal form. 6/3975 useless extension candidates. Maximal degree in co-relation 30439. Up to 3894 conditions per place. [2024-06-14 13:27:47,803 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 238 selfloop transitions, 30 changer transitions 0/271 dead transitions. [2024-06-14 13:27:47,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 210 places, 271 transitions, 3636 flow [2024-06-14 13:27:47,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:27:47,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:27:47,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:27:47,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 13:27:47,805 INFO L175 Difference]: Start difference. First operand has 204 places, 242 transitions, 2836 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:27:47,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 210 places, 271 transitions, 3636 flow [2024-06-14 13:27:48,042 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 271 transitions, 3497 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:48,046 INFO L231 Difference]: Finished difference. Result has 207 places, 251 transitions, 2891 flow [2024-06-14 13:27:48,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2697, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2891, PETRI_PLACES=207, PETRI_TRANSITIONS=251} [2024-06-14 13:27:48,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 165 predicate places. [2024-06-14 13:27:48,047 INFO L495 AbstractCegarLoop]: Abstraction has has 207 places, 251 transitions, 2891 flow [2024-06-14 13:27:48,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:27:48,047 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:48,047 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 13:27:48,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:27:48,047 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 13:27:48,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:48,048 INFO L85 PathProgramCache]: Analyzing trace with hash -868621959, now seen corresponding path program 3 times [2024-06-14 13:27:48,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:48,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546212750] [2024-06-14 13:27:48,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:48,048 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:48,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:48,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:48,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546212750] [2024-06-14 13:27:48,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546212750] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:48,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:48,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:48,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784706805] [2024-06-14 13:27:48,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:48,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:48,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:48,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:49,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:49,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 207 places, 251 transitions, 2891 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 13:27:49,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:49,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:49,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:49,910 INFO L124 PetriNetUnfolderBase]: 2798/4295 cut-off events. [2024-06-14 13:27:49,910 INFO L125 PetriNetUnfolderBase]: For 261902/261929 co-relation queries the response was YES. [2024-06-14 13:27:49,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33793 conditions, 4295 events. 2798/4295 cut-off events. For 261902/261929 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 22479 event pairs, 578 based on Foata normal form. 26/4307 useless extension candidates. Maximal degree in co-relation 33690. Up to 3372 conditions per place. [2024-06-14 13:27:49,955 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 206 selfloop transitions, 86 changer transitions 0/295 dead transitions. [2024-06-14 13:27:49,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 215 places, 295 transitions, 3905 flow [2024-06-14 13:27:49,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:49,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:49,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:27:49,956 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 13:27:49,956 INFO L175 Difference]: Start difference. First operand has 207 places, 251 transitions, 2891 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:27:49,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 215 places, 295 transitions, 3905 flow [2024-06-14 13:27:50,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 295 transitions, 3853 flow, removed 20 selfloop flow, removed 2 redundant places. [2024-06-14 13:27:50,316 INFO L231 Difference]: Finished difference. Result has 214 places, 253 transitions, 3087 flow [2024-06-14 13:27:50,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2839, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3087, PETRI_PLACES=214, PETRI_TRANSITIONS=253} [2024-06-14 13:27:50,316 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 172 predicate places. [2024-06-14 13:27:50,317 INFO L495 AbstractCegarLoop]: Abstraction has has 214 places, 253 transitions, 3087 flow [2024-06-14 13:27:50,317 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 13:27:50,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:50,317 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 13:27:50,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:27:50,317 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 13:27:50,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:50,317 INFO L85 PathProgramCache]: Analyzing trace with hash -868629399, now seen corresponding path program 4 times [2024-06-14 13:27:50,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:50,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521943136] [2024-06-14 13:27:50,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:50,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:50,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:51,226 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:51,227 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:51,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521943136] [2024-06-14 13:27:51,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1521943136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:51,227 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:51,227 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:27:51,227 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732771418] [2024-06-14 13:27:51,227 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:51,227 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:27:51,228 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:51,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:27:51,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:27:51,282 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:51,284 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 253 transitions, 3087 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 13:27:51,284 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:51,284 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:51,284 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:52,286 INFO L124 PetriNetUnfolderBase]: 2865/4408 cut-off events. [2024-06-14 13:27:52,286 INFO L125 PetriNetUnfolderBase]: For 281139/281166 co-relation queries the response was YES. [2024-06-14 13:27:52,316 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34926 conditions, 4408 events. 2865/4408 cut-off events. For 281139/281166 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 23297 event pairs, 587 based on Foata normal form. 34/4428 useless extension candidates. Maximal degree in co-relation 34821. Up to 3676 conditions per place. [2024-06-14 13:27:52,332 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 201 selfloop transitions, 87 changer transitions 0/291 dead transitions. [2024-06-14 13:27:52,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 291 transitions, 3863 flow [2024-06-14 13:27:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:52,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-14 13:27:52,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4254742547425474 [2024-06-14 13:27:52,334 INFO L175 Difference]: Start difference. First operand has 214 places, 253 transitions, 3087 flow. Second operand 9 states and 157 transitions. [2024-06-14 13:27:52,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 291 transitions, 3863 flow [2024-06-14 13:27:52,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 291 transitions, 3718 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:27:52,590 INFO L231 Difference]: Finished difference. Result has 218 places, 255 transitions, 3195 flow [2024-06-14 13:27:52,591 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2950, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=166, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3195, PETRI_PLACES=218, PETRI_TRANSITIONS=255} [2024-06-14 13:27:52,591 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 13:27:52,591 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 255 transitions, 3195 flow [2024-06-14 13:27:52,591 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 13:27:52,591 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:52,591 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 13:27:52,591 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:27:52,592 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 13:27:52,592 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:52,592 INFO L85 PathProgramCache]: Analyzing trace with hash -692059519, now seen corresponding path program 6 times [2024-06-14 13:27:52,592 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:52,592 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86533625] [2024-06-14 13:27:52,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:52,593 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:52,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:53,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:53,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:53,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86533625] [2024-06-14 13:27:53,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86533625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:53,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:53,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:53,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067444533] [2024-06-14 13:27:53,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:53,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:53,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:53,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:53,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:53,720 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:53,720 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 255 transitions, 3195 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 13:27:53,720 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:53,720 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:53,720 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:54,708 INFO L124 PetriNetUnfolderBase]: 2882/4435 cut-off events. [2024-06-14 13:27:54,708 INFO L125 PetriNetUnfolderBase]: For 270803/270830 co-relation queries the response was YES. [2024-06-14 13:27:54,738 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35498 conditions, 4435 events. 2882/4435 cut-off events. For 270803/270830 co-relation queries the response was YES. Maximal size of possible extension queue 224. Compared 23518 event pairs, 606 based on Foata normal form. 14/4435 useless extension candidates. Maximal degree in co-relation 35391. Up to 3823 conditions per place. [2024-06-14 13:27:54,755 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 199 selfloop transitions, 87 changer transitions 0/289 dead transitions. [2024-06-14 13:27:54,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 289 transitions, 3935 flow [2024-06-14 13:27:54,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:54,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:54,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:27:54,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 13:27:54,756 INFO L175 Difference]: Start difference. First operand has 218 places, 255 transitions, 3195 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:27:54,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 289 transitions, 3935 flow [2024-06-14 13:27:55,055 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 289 transitions, 3724 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:55,059 INFO L231 Difference]: Finished difference. Result has 220 places, 257 transitions, 3237 flow [2024-06-14 13:27:55,060 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2984, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=255, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=85, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3237, PETRI_PLACES=220, PETRI_TRANSITIONS=257} [2024-06-14 13:27:55,060 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 178 predicate places. [2024-06-14 13:27:55,060 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 257 transitions, 3237 flow [2024-06-14 13:27:55,061 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 13:27:55,061 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:55,061 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 13:27:55,061 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:27:55,061 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 13:27:55,061 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:55,062 INFO L85 PathProgramCache]: Analyzing trace with hash 2083421317, now seen corresponding path program 5 times [2024-06-14 13:27:55,062 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:55,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041459848] [2024-06-14 13:27:55,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:55,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:55,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:56,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:56,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:56,259 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041459848] [2024-06-14 13:27:56,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041459848] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:56,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:56,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:56,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139926386] [2024-06-14 13:27:56,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:56,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:56,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:56,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:56,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:56,344 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:56,344 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 257 transitions, 3237 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 13:27:56,344 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:56,344 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:56,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:57,287 INFO L124 PetriNetUnfolderBase]: 2907/4482 cut-off events. [2024-06-14 13:27:57,287 INFO L125 PetriNetUnfolderBase]: For 288700/288727 co-relation queries the response was YES. [2024-06-14 13:27:57,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35426 conditions, 4482 events. 2907/4482 cut-off events. For 288700/288727 co-relation queries the response was YES. Maximal size of possible extension queue 227. Compared 23895 event pairs, 627 based on Foata normal form. 30/4498 useless extension candidates. Maximal degree in co-relation 35318. Up to 3926 conditions per place. [2024-06-14 13:27:57,336 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 223 selfloop transitions, 73 changer transitions 0/299 dead transitions. [2024-06-14 13:27:57,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 229 places, 299 transitions, 4019 flow [2024-06-14 13:27:57,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:27:57,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:27:57,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 167 transitions. [2024-06-14 13:27:57,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4073170731707317 [2024-06-14 13:27:57,337 INFO L175 Difference]: Start difference. First operand has 220 places, 257 transitions, 3237 flow. Second operand 10 states and 167 transitions. [2024-06-14 13:27:57,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 229 places, 299 transitions, 4019 flow [2024-06-14 13:27:57,688 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 299 transitions, 3780 flow, removed 34 selfloop flow, removed 7 redundant places. [2024-06-14 13:27:57,692 INFO L231 Difference]: Finished difference. Result has 223 places, 259 transitions, 3202 flow [2024-06-14 13:27:57,692 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3000, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3202, PETRI_PLACES=223, PETRI_TRANSITIONS=259} [2024-06-14 13:27:57,692 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:27:57,692 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 259 transitions, 3202 flow [2024-06-14 13:27:57,692 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 13:27:57,693 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:27:57,693 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 13:27:57,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:27:57,693 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 13:27:57,693 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:27:57,693 INFO L85 PathProgramCache]: Analyzing trace with hash -692063239, now seen corresponding path program 7 times [2024-06-14 13:27:57,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:27:57,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123507767] [2024-06-14 13:27:57,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:27:57,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:27:57,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:27:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:27:58,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:27:58,744 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123507767] [2024-06-14 13:27:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123507767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:27:58,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:27:58,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:27:58,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001992945] [2024-06-14 13:27:58,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:27:58,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:27:58,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:27:58,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:27:58,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:27:58,846 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:27:58,846 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 259 transitions, 3202 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 13:27:58,846 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:27:58,846 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:27:58,846 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:27:59,807 INFO L124 PetriNetUnfolderBase]: 3035/4690 cut-off events. [2024-06-14 13:27:59,807 INFO L125 PetriNetUnfolderBase]: For 307883/307910 co-relation queries the response was YES. [2024-06-14 13:27:59,838 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37779 conditions, 4690 events. 3035/4690 cut-off events. For 307883/307910 co-relation queries the response was YES. Maximal size of possible extension queue 241. Compared 25336 event pairs, 643 based on Foata normal form. 14/4690 useless extension candidates. Maximal degree in co-relation 37670. Up to 3709 conditions per place. [2024-06-14 13:27:59,855 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 205 selfloop transitions, 94 changer transitions 0/302 dead transitions. [2024-06-14 13:27:59,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 231 places, 302 transitions, 4274 flow [2024-06-14 13:27:59,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:27:59,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:27:59,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-14 13:27:59,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43360433604336046 [2024-06-14 13:27:59,857 INFO L175 Difference]: Start difference. First operand has 223 places, 259 transitions, 3202 flow. Second operand 9 states and 160 transitions. [2024-06-14 13:27:59,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 231 places, 302 transitions, 4274 flow [2024-06-14 13:28:00,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 224 places, 302 transitions, 4124 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:00,275 INFO L231 Difference]: Finished difference. Result has 226 places, 264 transitions, 3417 flow [2024-06-14 13:28:00,275 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3052, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=259, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3417, PETRI_PLACES=226, PETRI_TRANSITIONS=264} [2024-06-14 13:28:00,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 184 predicate places. [2024-06-14 13:28:00,275 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 264 transitions, 3417 flow [2024-06-14 13:28:00,275 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 13:28:00,275 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:00,276 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 13:28:00,276 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:28:00,276 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 13:28:00,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:00,276 INFO L85 PathProgramCache]: Analyzing trace with hash -1945639449, now seen corresponding path program 6 times [2024-06-14 13:28:00,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:00,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709333914] [2024-06-14 13:28:00,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:00,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:00,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:01,134 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:01,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:01,134 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709333914] [2024-06-14 13:28:01,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709333914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:01,134 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:01,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:01,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669294423] [2024-06-14 13:28:01,134 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:01,134 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:01,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:01,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:01,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:01,209 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:01,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 264 transitions, 3417 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 13:28:01,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:01,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:01,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:02,159 INFO L124 PetriNetUnfolderBase]: 3154/4891 cut-off events. [2024-06-14 13:28:02,159 INFO L125 PetriNetUnfolderBase]: For 352725/352752 co-relation queries the response was YES. [2024-06-14 13:28:02,194 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40111 conditions, 4891 events. 3154/4891 cut-off events. For 352725/352752 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26672 event pairs, 609 based on Foata normal form. 26/4903 useless extension candidates. Maximal degree in co-relation 40000. Up to 2646 conditions per place. [2024-06-14 13:28:02,215 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 202 selfloop transitions, 103 changer transitions 0/308 dead transitions. [2024-06-14 13:28:02,215 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 308 transitions, 4498 flow [2024-06-14 13:28:02,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:02,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:28:02,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 13:28:02,217 INFO L175 Difference]: Start difference. First operand has 226 places, 264 transitions, 3417 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:28:02,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 308 transitions, 4498 flow [2024-06-14 13:28:02,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 308 transitions, 4277 flow, removed 49 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:02,676 INFO L231 Difference]: Finished difference. Result has 230 places, 267 transitions, 3576 flow [2024-06-14 13:28:02,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3208, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=264, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=162, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3576, PETRI_PLACES=230, PETRI_TRANSITIONS=267} [2024-06-14 13:28:02,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:28:02,677 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 267 transitions, 3576 flow [2024-06-14 13:28:02,677 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 13:28:02,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:02,678 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 13:28:02,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:28:02,678 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 13:28:02,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:02,678 INFO L85 PathProgramCache]: Analyzing trace with hash 1914166181, now seen corresponding path program 8 times [2024-06-14 13:28:02,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:02,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1240616290] [2024-06-14 13:28:02,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:02,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:03,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:03,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:03,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1240616290] [2024-06-14 13:28:03,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1240616290] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:03,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:03,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:28:03,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627046736] [2024-06-14 13:28:03,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:03,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:28:03,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:03,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:28:03,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:28:03,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:03,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 267 transitions, 3576 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 13:28:03,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:03,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:03,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:04,899 INFO L124 PetriNetUnfolderBase]: 3110/4823 cut-off events. [2024-06-14 13:28:04,899 INFO L125 PetriNetUnfolderBase]: For 341268/341295 co-relation queries the response was YES. [2024-06-14 13:28:04,934 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38957 conditions, 4823 events. 3110/4823 cut-off events. For 341268/341295 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 26340 event pairs, 679 based on Foata normal form. 34/4843 useless extension candidates. Maximal degree in co-relation 38844. Up to 4091 conditions per place. [2024-06-14 13:28:04,954 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 217 selfloop transitions, 83 changer transitions 0/303 dead transitions. [2024-06-14 13:28:04,954 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 303 transitions, 4310 flow [2024-06-14 13:28:04,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:04,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:04,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-14 13:28:04,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43089430894308944 [2024-06-14 13:28:04,955 INFO L175 Difference]: Start difference. First operand has 230 places, 267 transitions, 3576 flow. Second operand 9 states and 159 transitions. [2024-06-14 13:28:04,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 303 transitions, 4310 flow [2024-06-14 13:28:05,468 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 303 transitions, 4126 flow, removed 42 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:05,472 INFO L231 Difference]: Finished difference. Result has 234 places, 267 transitions, 3567 flow [2024-06-14 13:28:05,472 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3392, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=184, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3567, PETRI_PLACES=234, PETRI_TRANSITIONS=267} [2024-06-14 13:28:05,472 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 13:28:05,472 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 267 transitions, 3567 flow [2024-06-14 13:28:05,472 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 13:28:05,472 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:05,472 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 13:28:05,472 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:28:05,473 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 13:28:05,473 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:05,473 INFO L85 PathProgramCache]: Analyzing trace with hash -686337787, now seen corresponding path program 7 times [2024-06-14 13:28:05,473 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:05,473 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [18009884] [2024-06-14 13:28:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:05,473 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:06,348 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:06,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:06,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [18009884] [2024-06-14 13:28:06,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [18009884] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:06,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:06,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:06,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [244403782] [2024-06-14 13:28:06,349 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:06,349 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:06,349 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:06,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:06,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:06,422 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:06,422 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 267 transitions, 3567 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 13:28:06,422 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:06,422 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:06,422 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:07,422 INFO L124 PetriNetUnfolderBase]: 3118/4843 cut-off events. [2024-06-14 13:28:07,422 INFO L125 PetriNetUnfolderBase]: For 328395/328422 co-relation queries the response was YES. [2024-06-14 13:28:07,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38609 conditions, 4843 events. 3118/4843 cut-off events. For 328395/328422 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26505 event pairs, 671 based on Foata normal form. 26/4855 useless extension candidates. Maximal degree in co-relation 38494. Up to 3758 conditions per place. [2024-06-14 13:28:07,479 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 85 changer transitions 0/309 dead transitions. [2024-06-14 13:28:07,479 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 309 transitions, 4578 flow [2024-06-14 13:28:07,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:07,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:07,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 162 transitions. [2024-06-14 13:28:07,480 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:28:07,480 INFO L175 Difference]: Start difference. First operand has 234 places, 267 transitions, 3567 flow. Second operand 9 states and 162 transitions. [2024-06-14 13:28:07,480 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 309 transitions, 4578 flow [2024-06-14 13:28:07,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 309 transitions, 4409 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:07,880 INFO L231 Difference]: Finished difference. Result has 236 places, 268 transitions, 3613 flow [2024-06-14 13:28:07,880 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3398, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=267, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=183, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3613, PETRI_PLACES=236, PETRI_TRANSITIONS=268} [2024-06-14 13:28:07,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 13:28:07,881 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 268 transitions, 3613 flow [2024-06-14 13:28:07,881 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 13:28:07,881 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:07,882 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 13:28:07,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:28:07,882 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:07,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:07,882 INFO L85 PathProgramCache]: Analyzing trace with hash -929948750, now seen corresponding path program 2 times [2024-06-14 13:28:07,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:07,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172994955] [2024-06-14 13:28:07,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:07,882 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:07,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:08,659 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:08,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:08,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172994955] [2024-06-14 13:28:08,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172994955] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:08,659 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:08,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:08,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138673789] [2024-06-14 13:28:08,659 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:08,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:08,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:08,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:08,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:08,735 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:08,735 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 268 transitions, 3613 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:08,736 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:08,736 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:08,736 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:09,707 INFO L124 PetriNetUnfolderBase]: 3128/4852 cut-off events. [2024-06-14 13:28:09,708 INFO L125 PetriNetUnfolderBase]: For 321917/321921 co-relation queries the response was YES. [2024-06-14 13:28:09,744 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38928 conditions, 4852 events. 3128/4852 cut-off events. For 321917/321921 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26603 event pairs, 735 based on Foata normal form. 6/4855 useless extension candidates. Maximal degree in co-relation 38812. Up to 4770 conditions per place. [2024-06-14 13:28:09,763 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 254 selfloop transitions, 33 changer transitions 0/290 dead transitions. [2024-06-14 13:28:09,764 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 241 places, 290 transitions, 4399 flow [2024-06-14 13:28:09,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:28:09,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:28:09,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:28:09,765 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-14 13:28:09,765 INFO L175 Difference]: Start difference. First operand has 236 places, 268 transitions, 3613 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:28:09,765 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 241 places, 290 transitions, 4399 flow [2024-06-14 13:28:10,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 290 transitions, 4162 flow, removed 19 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:10,268 INFO L231 Difference]: Finished difference. Result has 235 places, 271 transitions, 3497 flow [2024-06-14 13:28:10,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3376, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=268, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=238, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3497, PETRI_PLACES=235, PETRI_TRANSITIONS=271} [2024-06-14 13:28:10,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 13:28:10,269 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 271 transitions, 3497 flow [2024-06-14 13:28:10,269 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:10,269 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:10,269 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 13:28:10,269 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:28:10,269 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:10,269 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:10,269 INFO L85 PathProgramCache]: Analyzing trace with hash -268045190, now seen corresponding path program 3 times [2024-06-14 13:28:10,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:10,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456878535] [2024-06-14 13:28:10,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:10,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:10,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456878535] [2024-06-14 13:28:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456878535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:11,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:11,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:28:11,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234146223] [2024-06-14 13:28:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:11,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:28:11,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:11,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:28:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:28:11,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:11,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 271 transitions, 3497 flow. Second operand has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:11,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:11,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:11,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:12,040 INFO L124 PetriNetUnfolderBase]: 3122/4844 cut-off events. [2024-06-14 13:28:12,040 INFO L125 PetriNetUnfolderBase]: For 322890/322894 co-relation queries the response was YES. [2024-06-14 13:28:12,079 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38217 conditions, 4844 events. 3122/4844 cut-off events. For 322890/322894 co-relation queries the response was YES. Maximal size of possible extension queue 253. Compared 26600 event pairs, 734 based on Foata normal form. 6/4847 useless extension candidates. Maximal degree in co-relation 38100. Up to 4779 conditions per place. [2024-06-14 13:28:12,100 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 257 selfloop transitions, 27 changer transitions 0/287 dead transitions. [2024-06-14 13:28:12,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 287 transitions, 4121 flow [2024-06-14 13:28:12,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:28:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:28:12,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-06-14 13:28:12,101 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43902439024390244 [2024-06-14 13:28:12,102 INFO L175 Difference]: Start difference. First operand has 235 places, 271 transitions, 3497 flow. Second operand 5 states and 90 transitions. [2024-06-14 13:28:12,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 287 transitions, 4121 flow [2024-06-14 13:28:12,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 287 transitions, 4023 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:12,562 INFO L231 Difference]: Finished difference. Result has 236 places, 271 transitions, 3475 flow [2024-06-14 13:28:12,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3399, PETRI_DIFFERENCE_MINUEND_PLACES=231, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3475, PETRI_PLACES=236, PETRI_TRANSITIONS=271} [2024-06-14 13:28:12,563 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 194 predicate places. [2024-06-14 13:28:12,563 INFO L495 AbstractCegarLoop]: Abstraction has has 236 places, 271 transitions, 3475 flow [2024-06-14 13:28:12,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.666666666666666) internal successors, (78), 9 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:12,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:12,563 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 13:28:12,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:28:12,563 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:12,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:12,563 INFO L85 PathProgramCache]: Analyzing trace with hash -2049481374, now seen corresponding path program 1 times [2024-06-14 13:28:12,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:12,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940335311] [2024-06-14 13:28:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:12,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:12,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:13,341 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:13,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:13,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940335311] [2024-06-14 13:28:13,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940335311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:13,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:13,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:13,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [961981461] [2024-06-14 13:28:13,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:13,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:13,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:13,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:13,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:13,426 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:28:13,426 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 271 transitions, 3475 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:13,426 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:13,426 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:28:13,426 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:14,247 INFO L124 PetriNetUnfolderBase]: 3023/4757 cut-off events. [2024-06-14 13:28:14,247 INFO L125 PetriNetUnfolderBase]: For 322933/322933 co-relation queries the response was YES. [2024-06-14 13:28:14,282 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37746 conditions, 4757 events. 3023/4757 cut-off events. For 322933/322933 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 26575 event pairs, 725 based on Foata normal form. 3/4754 useless extension candidates. Maximal degree in co-relation 37629. Up to 4549 conditions per place. [2024-06-14 13:28:14,298 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 244 selfloop transitions, 25 changer transitions 0/297 dead transitions. [2024-06-14 13:28:14,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 297 transitions, 4289 flow [2024-06-14 13:28:14,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:14,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:14,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:28:14,299 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:28:14,299 INFO L175 Difference]: Start difference. First operand has 236 places, 271 transitions, 3475 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:28:14,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 297 transitions, 4289 flow [2024-06-14 13:28:14,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 297 transitions, 4235 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:14,767 INFO L231 Difference]: Finished difference. Result has 239 places, 277 transitions, 3591 flow [2024-06-14 13:28:14,767 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3421, PETRI_DIFFERENCE_MINUEND_PLACES=232, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=271, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3591, PETRI_PLACES=239, PETRI_TRANSITIONS=277} [2024-06-14 13:28:14,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 197 predicate places. [2024-06-14 13:28:14,768 INFO L495 AbstractCegarLoop]: Abstraction has has 239 places, 277 transitions, 3591 flow [2024-06-14 13:28:14,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:14,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:14,768 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 13:28:14,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:28:14,769 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:14,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:14,769 INFO L85 PathProgramCache]: Analyzing trace with hash -2049361404, now seen corresponding path program 2 times [2024-06-14 13:28:14,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:14,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163036489] [2024-06-14 13:28:14,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:14,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:14,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:15,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:15,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:15,598 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163036489] [2024-06-14 13:28:15,598 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163036489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:15,598 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:15,598 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:15,598 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689093147] [2024-06-14 13:28:15,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:15,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:15,599 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:15,599 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:15,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:15,653 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:28:15,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 277 transitions, 3591 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:15,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:15,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:28:15,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:16,592 INFO L124 PetriNetUnfolderBase]: 3052/4798 cut-off events. [2024-06-14 13:28:16,593 INFO L125 PetriNetUnfolderBase]: For 338102/338102 co-relation queries the response was YES. [2024-06-14 13:28:16,630 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38496 conditions, 4798 events. 3052/4798 cut-off events. For 338102/338102 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 26869 event pairs, 724 based on Foata normal form. 3/4795 useless extension candidates. Maximal degree in co-relation 38378. Up to 4601 conditions per place. [2024-06-14 13:28:16,649 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 25 changer transitions 0/301 dead transitions. [2024-06-14 13:28:16,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 301 transitions, 4292 flow [2024-06-14 13:28:16,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:28:16,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:28:16,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 114 transitions. [2024-06-14 13:28:16,650 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.397212543554007 [2024-06-14 13:28:16,651 INFO L175 Difference]: Start difference. First operand has 239 places, 277 transitions, 3591 flow. Second operand 7 states and 114 transitions. [2024-06-14 13:28:16,651 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 301 transitions, 4292 flow [2024-06-14 13:28:17,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 242 places, 301 transitions, 4215 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:17,186 INFO L231 Difference]: Finished difference. Result has 243 places, 285 transitions, 3682 flow [2024-06-14 13:28:17,187 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3521, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=277, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3682, PETRI_PLACES=243, PETRI_TRANSITIONS=285} [2024-06-14 13:28:17,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 201 predicate places. [2024-06-14 13:28:17,187 INFO L495 AbstractCegarLoop]: Abstraction has has 243 places, 285 transitions, 3682 flow [2024-06-14 13:28:17,187 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:17,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:17,187 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 13:28:17,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:28:17,187 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:17,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:17,188 INFO L85 PathProgramCache]: Analyzing trace with hash -1525222854, now seen corresponding path program 3 times [2024-06-14 13:28:17,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:17,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085006540] [2024-06-14 13:28:17,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:17,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:17,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:17,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:17,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:17,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085006540] [2024-06-14 13:28:17,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085006540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:17,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:17,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:28:17,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992403168] [2024-06-14 13:28:17,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:17,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:28:17,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:17,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:28:17,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:28:17,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:28:17,996 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 243 places, 285 transitions, 3682 flow. Second operand has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:17,996 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:17,996 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:28:17,996 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:18,901 INFO L124 PetriNetUnfolderBase]: 3048/4791 cut-off events. [2024-06-14 13:28:18,901 INFO L125 PetriNetUnfolderBase]: For 340673/340673 co-relation queries the response was YES. [2024-06-14 13:28:18,942 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38471 conditions, 4791 events. 3048/4791 cut-off events. For 340673/340673 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 26745 event pairs, 725 based on Foata normal form. 3/4788 useless extension candidates. Maximal degree in co-relation 38351. Up to 4591 conditions per place. [2024-06-14 13:28:18,960 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 251 selfloop transitions, 23 changer transitions 0/302 dead transitions. [2024-06-14 13:28:18,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 248 places, 302 transitions, 4284 flow [2024-06-14 13:28:18,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:28:18,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:28:18,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-14 13:28:18,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4268292682926829 [2024-06-14 13:28:18,961 INFO L175 Difference]: Start difference. First operand has 243 places, 285 transitions, 3682 flow. Second operand 6 states and 105 transitions. [2024-06-14 13:28:18,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 248 places, 302 transitions, 4284 flow [2024-06-14 13:28:19,632 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 302 transitions, 4153 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:19,635 INFO L231 Difference]: Finished difference. Result has 245 places, 285 transitions, 3608 flow [2024-06-14 13:28:19,636 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=239, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=262, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3608, PETRI_PLACES=245, PETRI_TRANSITIONS=285} [2024-06-14 13:28:19,636 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-14 13:28:19,636 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 285 transitions, 3608 flow [2024-06-14 13:28:19,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.875) internal successors, (79), 8 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:28:19,636 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:19,637 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 13:28:19,637 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:28:19,637 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:19,637 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:19,637 INFO L85 PathProgramCache]: Analyzing trace with hash -268030310, now seen corresponding path program 1 times [2024-06-14 13:28:19,637 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:19,637 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1262185072] [2024-06-14 13:28:19,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:19,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:19,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:20,656 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:20,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:20,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1262185072] [2024-06-14 13:28:20,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1262185072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:20,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:20,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:20,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327074900] [2024-06-14 13:28:20,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:20,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:20,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:20,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:20,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:20,766 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:20,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 285 transitions, 3608 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 13:28:20,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:20,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:20,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:21,715 INFO L124 PetriNetUnfolderBase]: 3161/4903 cut-off events. [2024-06-14 13:28:21,716 INFO L125 PetriNetUnfolderBase]: For 346383/346383 co-relation queries the response was YES. [2024-06-14 13:28:21,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38997 conditions, 4903 events. 3161/4903 cut-off events. For 346383/346383 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 26842 event pairs, 763 based on Foata normal form. 2/4902 useless extension candidates. Maximal degree in co-relation 38876. Up to 4865 conditions per place. [2024-06-14 13:28:21,776 INFO L140 encePairwiseOnDemand]: 35/41 looper letters, 280 selfloop transitions, 13 changer transitions 0/296 dead transitions. [2024-06-14 13:28:21,776 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 296 transitions, 4246 flow [2024-06-14 13:28:21,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:28:21,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:28:21,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 81 transitions. [2024-06-14 13:28:21,777 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-14 13:28:21,777 INFO L175 Difference]: Start difference. First operand has 245 places, 285 transitions, 3608 flow. Second operand 5 states and 81 transitions. [2024-06-14 13:28:21,777 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 296 transitions, 4246 flow [2024-06-14 13:28:22,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 296 transitions, 4189 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:22,336 INFO L231 Difference]: Finished difference. Result has 245 places, 287 transitions, 3612 flow [2024-06-14 13:28:22,336 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3551, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=3612, PETRI_PLACES=245, PETRI_TRANSITIONS=287} [2024-06-14 13:28:22,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 203 predicate places. [2024-06-14 13:28:22,336 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 287 transitions, 3612 flow [2024-06-14 13:28:22,337 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 13:28:22,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:22,337 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 13:28:22,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:28:22,337 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 13:28:22,337 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:22,337 INFO L85 PathProgramCache]: Analyzing trace with hash 185561816, now seen corresponding path program 1 times [2024-06-14 13:28:22,337 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:22,337 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1188967149] [2024-06-14 13:28:22,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:22,338 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:22,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:23,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:23,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:23,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1188967149] [2024-06-14 13:28:23,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1188967149] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:23,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:23,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:23,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291694985] [2024-06-14 13:28:23,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:23,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:23,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:23,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:23,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:23,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:23,804 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 287 transitions, 3612 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 13:28:23,804 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:23,804 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:23,804 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:25,033 INFO L124 PetriNetUnfolderBase]: 3202/4970 cut-off events. [2024-06-14 13:28:25,034 INFO L125 PetriNetUnfolderBase]: For 371296/371300 co-relation queries the response was YES. [2024-06-14 13:28:25,067 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39692 conditions, 4970 events. 3202/4970 cut-off events. For 371296/371300 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 27237 event pairs, 582 based on Foata normal form. 16/4983 useless extension candidates. Maximal degree in co-relation 39570. Up to 4657 conditions per place. [2024-06-14 13:28:25,082 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 298 selfloop transitions, 30 changer transitions 0/331 dead transitions. [2024-06-14 13:28:25,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 331 transitions, 4450 flow [2024-06-14 13:28:25,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:25,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:25,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 160 transitions. [2024-06-14 13:28:25,084 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:28:25,084 INFO L175 Difference]: Start difference. First operand has 245 places, 287 transitions, 3612 flow. Second operand 10 states and 160 transitions. [2024-06-14 13:28:25,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 331 transitions, 4450 flow [2024-06-14 13:28:25,578 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 331 transitions, 4405 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:25,582 INFO L231 Difference]: Finished difference. Result has 252 places, 288 transitions, 3677 flow [2024-06-14 13:28:25,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3567, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=257, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3677, PETRI_PLACES=252, PETRI_TRANSITIONS=288} [2024-06-14 13:28:25,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-14 13:28:25,582 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 288 transitions, 3677 flow [2024-06-14 13:28:25,583 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 13:28:25,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:25,583 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 13:28:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:28:25,583 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:25,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:25,583 INFO L85 PathProgramCache]: Analyzing trace with hash -1474689440, now seen corresponding path program 2 times [2024-06-14 13:28:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:25,583 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946361863] [2024-06-14 13:28:25,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:25,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:25,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:26,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:26,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:26,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946361863] [2024-06-14 13:28:26,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946361863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:26,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:26,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:26,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993260425] [2024-06-14 13:28:26,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:26,983 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:26,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:26,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:26,984 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:27,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:27,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 288 transitions, 3677 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 13:28:27,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:27,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:27,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:28,308 INFO L124 PetriNetUnfolderBase]: 3243/5041 cut-off events. [2024-06-14 13:28:28,308 INFO L125 PetriNetUnfolderBase]: For 385512/385516 co-relation queries the response was YES. [2024-06-14 13:28:28,350 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40502 conditions, 5041 events. 3243/5041 cut-off events. For 385512/385516 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 27850 event pairs, 724 based on Foata normal form. 16/5054 useless extension candidates. Maximal degree in co-relation 40379. Up to 4717 conditions per place. [2024-06-14 13:28:28,367 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 291 selfloop transitions, 38 changer transitions 0/332 dead transitions. [2024-06-14 13:28:28,368 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 332 transitions, 4521 flow [2024-06-14 13:28:28,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:28,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:28,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 13:28:28,369 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-14 13:28:28,369 INFO L175 Difference]: Start difference. First operand has 252 places, 288 transitions, 3677 flow. Second operand 10 states and 163 transitions. [2024-06-14 13:28:28,369 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 332 transitions, 4521 flow [2024-06-14 13:28:29,010 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 254 places, 332 transitions, 4437 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:29,014 INFO L231 Difference]: Finished difference. Result has 255 places, 289 transitions, 3721 flow [2024-06-14 13:28:29,014 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3593, PETRI_DIFFERENCE_MINUEND_PLACES=245, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=288, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3721, PETRI_PLACES=255, PETRI_TRANSITIONS=289} [2024-06-14 13:28:29,015 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 213 predicate places. [2024-06-14 13:28:29,015 INFO L495 AbstractCegarLoop]: Abstraction has has 255 places, 289 transitions, 3721 flow [2024-06-14 13:28:29,015 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 13:28:29,015 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:29,015 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 13:28:29,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:28:29,016 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:29,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:29,016 INFO L85 PathProgramCache]: Analyzing trace with hash 243769586, now seen corresponding path program 3 times [2024-06-14 13:28:29,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:29,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619687537] [2024-06-14 13:28:29,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:29,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:29,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:30,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:30,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:30,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619687537] [2024-06-14 13:28:30,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619687537] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:30,379 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:30,379 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:30,380 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761086754] [2024-06-14 13:28:30,380 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:30,380 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:30,380 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:30,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:30,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:30,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:30,542 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 255 places, 289 transitions, 3721 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 13:28:30,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:30,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:30,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:31,742 INFO L124 PetriNetUnfolderBase]: 3284/5112 cut-off events. [2024-06-14 13:28:31,742 INFO L125 PetriNetUnfolderBase]: For 399167/399171 co-relation queries the response was YES. [2024-06-14 13:28:31,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40987 conditions, 5112 events. 3284/5112 cut-off events. For 399167/399171 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 28363 event pairs, 746 based on Foata normal form. 16/5125 useless extension candidates. Maximal degree in co-relation 40863. Up to 4834 conditions per place. [2024-06-14 13:28:31,806 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 294 selfloop transitions, 36 changer transitions 0/333 dead transitions. [2024-06-14 13:28:31,806 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 333 transitions, 4557 flow [2024-06-14 13:28:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:31,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:31,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 162 transitions. [2024-06-14 13:28:31,807 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3951219512195122 [2024-06-14 13:28:31,807 INFO L175 Difference]: Start difference. First operand has 255 places, 289 transitions, 3721 flow. Second operand 10 states and 162 transitions. [2024-06-14 13:28:31,807 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 333 transitions, 4557 flow [2024-06-14 13:28:32,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 333 transitions, 4449 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:32,531 INFO L231 Difference]: Finished difference. Result has 257 places, 290 transitions, 3725 flow [2024-06-14 13:28:32,531 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3613, PETRI_DIFFERENCE_MINUEND_PLACES=247, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=289, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3725, PETRI_PLACES=257, PETRI_TRANSITIONS=290} [2024-06-14 13:28:32,531 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 215 predicate places. [2024-06-14 13:28:32,531 INFO L495 AbstractCegarLoop]: Abstraction has has 257 places, 290 transitions, 3725 flow [2024-06-14 13:28:32,531 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 13:28:32,531 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:32,531 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 13:28:32,531 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:28:32,532 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 13:28:32,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:32,532 INFO L85 PathProgramCache]: Analyzing trace with hash -316782640, now seen corresponding path program 1 times [2024-06-14 13:28:32,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:32,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009160739] [2024-06-14 13:28:32,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:32,532 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:32,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:33,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:33,456 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:33,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009160739] [2024-06-14 13:28:33,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009160739] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:33,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:33,456 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:33,456 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948843600] [2024-06-14 13:28:33,456 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:33,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:33,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:33,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:33,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:33,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:33,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 257 places, 290 transitions, 3725 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 13:28:33,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:33,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:33,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:34,703 INFO L124 PetriNetUnfolderBase]: 3324/5168 cut-off events. [2024-06-14 13:28:34,703 INFO L125 PetriNetUnfolderBase]: For 398302/398306 co-relation queries the response was YES. [2024-06-14 13:28:34,749 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41322 conditions, 5168 events. 3324/5168 cut-off events. For 398302/398306 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 28676 event pairs, 774 based on Foata normal form. 8/5173 useless extension candidates. Maximal degree in co-relation 41197. Up to 4919 conditions per place. [2024-06-14 13:28:34,768 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 265 selfloop transitions, 68 changer transitions 0/336 dead transitions. [2024-06-14 13:28:34,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 336 transitions, 4799 flow [2024-06-14 13:28:34,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:34,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:34,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-14 13:28:34,770 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4176829268292683 [2024-06-14 13:28:34,770 INFO L175 Difference]: Start difference. First operand has 257 places, 290 transitions, 3725 flow. Second operand 8 states and 137 transitions. [2024-06-14 13:28:34,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 336 transitions, 4799 flow [2024-06-14 13:28:35,644 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 336 transitions, 4711 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:35,647 INFO L231 Difference]: Finished difference. Result has 258 places, 306 transitions, 4000 flow [2024-06-14 13:28:35,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3637, PETRI_DIFFERENCE_MINUEND_PLACES=249, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=290, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=231, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4000, PETRI_PLACES=258, PETRI_TRANSITIONS=306} [2024-06-14 13:28:35,648 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-14 13:28:35,648 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 306 transitions, 4000 flow [2024-06-14 13:28:35,648 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 13:28:35,648 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:35,649 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 13:28:35,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:28:35,649 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:35,649 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:35,649 INFO L85 PathProgramCache]: Analyzing trace with hash -2067384496, now seen corresponding path program 4 times [2024-06-14 13:28:35,649 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:35,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834937916] [2024-06-14 13:28:35,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:35,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:37,108 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:37,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:37,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834937916] [2024-06-14 13:28:37,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834937916] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:37,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:37,109 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:37,109 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543392693] [2024-06-14 13:28:37,109 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:37,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:37,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:37,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:37,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:37,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:37,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 306 transitions, 4000 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 13:28:37,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:37,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:37,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:38,445 INFO L124 PetriNetUnfolderBase]: 3365/5241 cut-off events. [2024-06-14 13:28:38,445 INFO L125 PetriNetUnfolderBase]: For 423427/423429 co-relation queries the response was YES. [2024-06-14 13:28:38,489 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42239 conditions, 5241 events. 3365/5241 cut-off events. For 423427/423429 co-relation queries the response was YES. Maximal size of possible extension queue 276. Compared 29241 event pairs, 764 based on Foata normal form. 14/5252 useless extension candidates. Maximal degree in co-relation 42112. Up to 4884 conditions per place. [2024-06-14 13:28:38,508 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 297 selfloop transitions, 48 changer transitions 0/348 dead transitions. [2024-06-14 13:28:38,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 267 places, 348 transitions, 4873 flow [2024-06-14 13:28:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:38,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:38,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 163 transitions. [2024-06-14 13:28:38,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3975609756097561 [2024-06-14 13:28:38,510 INFO L175 Difference]: Start difference. First operand has 258 places, 306 transitions, 4000 flow. Second operand 10 states and 163 transitions. [2024-06-14 13:28:38,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 267 places, 348 transitions, 4873 flow [2024-06-14 13:28:39,259 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 348 transitions, 4786 flow, removed 26 selfloop flow, removed 3 redundant places. [2024-06-14 13:28:39,263 INFO L231 Difference]: Finished difference. Result has 266 places, 308 transitions, 4075 flow [2024-06-14 13:28:39,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3913, PETRI_DIFFERENCE_MINUEND_PLACES=255, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=306, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4075, PETRI_PLACES=266, PETRI_TRANSITIONS=308} [2024-06-14 13:28:39,264 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 224 predicate places. [2024-06-14 13:28:39,264 INFO L495 AbstractCegarLoop]: Abstraction has has 266 places, 308 transitions, 4075 flow [2024-06-14 13:28:39,264 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 13:28:39,264 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:39,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:39,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:28:39,265 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:39,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:39,265 INFO L85 PathProgramCache]: Analyzing trace with hash -1226509934, now seen corresponding path program 5 times [2024-06-14 13:28:39,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:39,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143895642] [2024-06-14 13:28:39,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:39,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:39,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:40,453 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:40,453 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143895642] [2024-06-14 13:28:40,453 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143895642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:40,453 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:40,453 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:28:40,453 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734370389] [2024-06-14 13:28:40,453 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:40,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:28:40,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:40,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:28:40,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:28:40,548 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:40,548 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 266 places, 308 transitions, 4075 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 13:28:40,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:40,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:40,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:41,762 INFO L124 PetriNetUnfolderBase]: 3345/5209 cut-off events. [2024-06-14 13:28:41,763 INFO L125 PetriNetUnfolderBase]: For 417405/417407 co-relation queries the response was YES. [2024-06-14 13:28:41,818 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41732 conditions, 5209 events. 3345/5209 cut-off events. For 417405/417407 co-relation queries the response was YES. Maximal size of possible extension queue 274. Compared 29051 event pairs, 720 based on Foata normal form. 14/5220 useless extension candidates. Maximal degree in co-relation 41602. Up to 4673 conditions per place. [2024-06-14 13:28:41,838 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 287 selfloop transitions, 53 changer transitions 0/343 dead transitions. [2024-06-14 13:28:41,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 343 transitions, 4869 flow [2024-06-14 13:28:41,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:41,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:41,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:28:41,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 13:28:41,839 INFO L175 Difference]: Start difference. First operand has 266 places, 308 transitions, 4075 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:28:41,840 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 343 transitions, 4869 flow [2024-06-14 13:28:42,678 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 267 places, 343 transitions, 4728 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:28:42,682 INFO L231 Difference]: Finished difference. Result has 268 places, 308 transitions, 4050 flow [2024-06-14 13:28:42,682 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3934, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=255, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4050, PETRI_PLACES=268, PETRI_TRANSITIONS=308} [2024-06-14 13:28:42,682 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 226 predicate places. [2024-06-14 13:28:42,682 INFO L495 AbstractCegarLoop]: Abstraction has has 268 places, 308 transitions, 4050 flow [2024-06-14 13:28:42,682 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 13:28:42,683 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:42,683 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:28:42,683 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:28:42,683 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:42,683 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:42,683 INFO L85 PathProgramCache]: Analyzing trace with hash -1226625254, now seen corresponding path program 6 times [2024-06-14 13:28:42,683 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:42,683 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444802076] [2024-06-14 13:28:42,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:42,683 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:42,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:43,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:43,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:43,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444802076] [2024-06-14 13:28:43,893 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444802076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:43,893 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:43,893 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:28:43,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1169334222] [2024-06-14 13:28:43,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:43,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:28:43,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:43,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:28:43,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:28:44,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:44,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 268 places, 308 transitions, 4050 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 13:28:44,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:44,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:44,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:45,339 INFO L124 PetriNetUnfolderBase]: 3386/5280 cut-off events. [2024-06-14 13:28:45,339 INFO L125 PetriNetUnfolderBase]: For 431565/431567 co-relation queries the response was YES. [2024-06-14 13:28:45,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42293 conditions, 5280 events. 3386/5280 cut-off events. For 431565/431567 co-relation queries the response was YES. Maximal size of possible extension queue 280. Compared 29599 event pairs, 731 based on Foata normal form. 14/5291 useless extension candidates. Maximal degree in co-relation 42162. Up to 4726 conditions per place. [2024-06-14 13:28:45,395 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 285 selfloop transitions, 56 changer transitions 0/344 dead transitions. [2024-06-14 13:28:45,395 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 344 transitions, 4890 flow [2024-06-14 13:28:45,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:45,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:45,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:28:45,396 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 13:28:45,396 INFO L175 Difference]: Start difference. First operand has 268 places, 308 transitions, 4050 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:28:45,397 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 344 transitions, 4890 flow [2024-06-14 13:28:46,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 268 places, 344 transitions, 4751 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:28:46,090 INFO L231 Difference]: Finished difference. Result has 269 places, 309 transitions, 4079 flow [2024-06-14 13:28:46,090 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3911, PETRI_DIFFERENCE_MINUEND_PLACES=260, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=308, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4079, PETRI_PLACES=269, PETRI_TRANSITIONS=309} [2024-06-14 13:28:46,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 227 predicate places. [2024-06-14 13:28:46,091 INFO L495 AbstractCegarLoop]: Abstraction has has 269 places, 309 transitions, 4079 flow [2024-06-14 13:28:46,091 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 13:28:46,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:46,091 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 13:28:46,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:28:46,091 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 13:28:46,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:46,091 INFO L85 PathProgramCache]: Analyzing trace with hash 920862936, now seen corresponding path program 2 times [2024-06-14 13:28:46,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:46,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [459986464] [2024-06-14 13:28:46,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:46,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:46,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:46,996 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:46,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:46,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [459986464] [2024-06-14 13:28:46,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [459986464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:46,996 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:46,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:46,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607356914] [2024-06-14 13:28:46,996 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:46,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:46,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:46,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:46,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:47,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:47,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 269 places, 309 transitions, 4079 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 13:28:47,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:47,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:47,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:48,398 INFO L124 PetriNetUnfolderBase]: 3448/5366 cut-off events. [2024-06-14 13:28:48,398 INFO L125 PetriNetUnfolderBase]: For 414354/414356 co-relation queries the response was YES. [2024-06-14 13:28:48,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42788 conditions, 5366 events. 3448/5366 cut-off events. For 414354/414356 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 30055 event pairs, 801 based on Foata normal form. 6/5369 useless extension candidates. Maximal degree in co-relation 42656. Up to 5075 conditions per place. [2024-06-14 13:28:48,457 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 274 selfloop transitions, 71 changer transitions 0/348 dead transitions. [2024-06-14 13:28:48,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 276 places, 348 transitions, 5257 flow [2024-06-14 13:28:48,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:48,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:48,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-14 13:28:48,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:28:48,459 INFO L175 Difference]: Start difference. First operand has 269 places, 309 transitions, 4079 flow. Second operand 8 states and 136 transitions. [2024-06-14 13:28:48,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 276 places, 348 transitions, 5257 flow [2024-06-14 13:28:49,323 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 270 places, 348 transitions, 5114 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:28:49,327 INFO L231 Difference]: Finished difference. Result has 272 places, 320 transitions, 4255 flow [2024-06-14 13:28:49,328 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3940, PETRI_DIFFERENCE_MINUEND_PLACES=263, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4255, PETRI_PLACES=272, PETRI_TRANSITIONS=320} [2024-06-14 13:28:49,328 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 230 predicate places. [2024-06-14 13:28:49,328 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 320 transitions, 4255 flow [2024-06-14 13:28:49,329 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 13:28:49,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:49,329 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 13:28:49,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:28:49,329 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:28:49,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:49,330 INFO L85 PathProgramCache]: Analyzing trace with hash 920874096, now seen corresponding path program 3 times [2024-06-14 13:28:49,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:49,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238311266] [2024-06-14 13:28:49,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:49,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:49,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:50,142 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:50,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:50,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238311266] [2024-06-14 13:28:50,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238311266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:50,143 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:50,143 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:28:50,143 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380544194] [2024-06-14 13:28:50,143 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:50,143 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:28:50,143 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:50,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:28:50,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:28:50,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:50,212 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 320 transitions, 4255 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 13:28:50,212 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:50,212 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:50,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:51,660 INFO L124 PetriNetUnfolderBase]: 3436/5350 cut-off events. [2024-06-14 13:28:51,660 INFO L125 PetriNetUnfolderBase]: For 402891/402893 co-relation queries the response was YES. [2024-06-14 13:28:51,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42250 conditions, 5350 events. 3436/5350 cut-off events. For 402891/402893 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 29971 event pairs, 797 based on Foata normal form. 6/5353 useless extension candidates. Maximal degree in co-relation 42116. Up to 5067 conditions per place. [2024-06-14 13:28:51,730 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 264 selfloop transitions, 77 changer transitions 0/344 dead transitions. [2024-06-14 13:28:51,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 344 transitions, 5140 flow [2024-06-14 13:28:51,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:28:51,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:28:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 133 transitions. [2024-06-14 13:28:51,731 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4054878048780488 [2024-06-14 13:28:51,731 INFO L175 Difference]: Start difference. First operand has 272 places, 320 transitions, 4255 flow. Second operand 8 states and 133 transitions. [2024-06-14 13:28:51,731 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 344 transitions, 5140 flow [2024-06-14 13:28:52,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 344 transitions, 4984 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-14 13:28:52,958 INFO L231 Difference]: Finished difference. Result has 276 places, 320 transitions, 4259 flow [2024-06-14 13:28:52,958 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4099, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4259, PETRI_PLACES=276, PETRI_TRANSITIONS=320} [2024-06-14 13:28:52,959 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 234 predicate places. [2024-06-14 13:28:52,959 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 320 transitions, 4259 flow [2024-06-14 13:28:52,959 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 13:28:52,959 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:52,959 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 13:28:52,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:28:52,959 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 13:28:52,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:52,959 INFO L85 PathProgramCache]: Analyzing trace with hash 20992242, now seen corresponding path program 7 times [2024-06-14 13:28:52,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:52,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577378830] [2024-06-14 13:28:52,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:52,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:52,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:54,461 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:54,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:54,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577378830] [2024-06-14 13:28:54,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577378830] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:54,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:54,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:28:54,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800622083] [2024-06-14 13:28:54,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:54,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:28:54,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:54,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:28:54,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:28:54,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:54,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 320 transitions, 4259 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 13:28:54,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:54,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:54,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:55,806 INFO L124 PetriNetUnfolderBase]: 3477/5424 cut-off events. [2024-06-14 13:28:55,806 INFO L125 PetriNetUnfolderBase]: For 428404/428431 co-relation queries the response was YES. [2024-06-14 13:28:55,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42727 conditions, 5424 events. 3477/5424 cut-off events. For 428404/428431 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 30561 event pairs, 774 based on Foata normal form. 22/5432 useless extension candidates. Maximal degree in co-relation 42592. Up to 4942 conditions per place. [2024-06-14 13:28:55,876 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 289 selfloop transitions, 67 changer transitions 0/359 dead transitions. [2024-06-14 13:28:55,876 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 285 places, 359 transitions, 5126 flow [2024-06-14 13:28:55,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:28:55,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:28:55,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 164 transitions. [2024-06-14 13:28:55,877 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-14 13:28:55,877 INFO L175 Difference]: Start difference. First operand has 276 places, 320 transitions, 4259 flow. Second operand 10 states and 164 transitions. [2024-06-14 13:28:55,877 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 285 places, 359 transitions, 5126 flow [2024-06-14 13:28:56,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 359 transitions, 5002 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:28:56,913 INFO L231 Difference]: Finished difference. Result has 281 places, 321 transitions, 4308 flow [2024-06-14 13:28:56,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4135, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4308, PETRI_PLACES=281, PETRI_TRANSITIONS=321} [2024-06-14 13:28:56,914 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 13:28:56,914 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 321 transitions, 4308 flow [2024-06-14 13:28:56,914 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 13:28:56,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:28:56,914 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 13:28:56,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:28:56,914 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 13:28:56,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:28:56,914 INFO L85 PathProgramCache]: Analyzing trace with hash 20876922, now seen corresponding path program 8 times [2024-06-14 13:28:56,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:28:56,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1916943900] [2024-06-14 13:28:56,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:28:56,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:28:56,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:28:58,292 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:28:58,292 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:28:58,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1916943900] [2024-06-14 13:28:58,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1916943900] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:28:58,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:28:58,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:28:58,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916931518] [2024-06-14 13:28:58,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:28:58,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:28:58,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:28:58,293 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:28:58,293 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:28:58,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:28:58,358 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 321 transitions, 4308 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 13:28:58,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:28:58,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:28:58,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:28:59,539 INFO L124 PetriNetUnfolderBase]: 3457/5392 cut-off events. [2024-06-14 13:28:59,539 INFO L125 PetriNetUnfolderBase]: For 420988/421015 co-relation queries the response was YES. [2024-06-14 13:28:59,590 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42102 conditions, 5392 events. 3457/5392 cut-off events. For 420988/421015 co-relation queries the response was YES. Maximal size of possible extension queue 287. Compared 30434 event pairs, 743 based on Foata normal form. 22/5400 useless extension candidates. Maximal degree in co-relation 41966. Up to 4833 conditions per place. [2024-06-14 13:28:59,610 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 282 selfloop transitions, 71 changer transitions 0/356 dead transitions. [2024-06-14 13:28:59,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 356 transitions, 5142 flow [2024-06-14 13:28:59,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:28:59,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:28:59,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:28:59,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:28:59,611 INFO L175 Difference]: Start difference. First operand has 281 places, 321 transitions, 4308 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:28:59,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 356 transitions, 5142 flow [2024-06-14 13:29:00,475 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 356 transitions, 4984 flow, removed 9 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:00,480 INFO L231 Difference]: Finished difference. Result has 283 places, 322 transitions, 4330 flow [2024-06-14 13:29:00,480 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4150, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=70, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=250, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4330, PETRI_PLACES=283, PETRI_TRANSITIONS=322} [2024-06-14 13:29:00,480 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 13:29:00,480 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 322 transitions, 4330 flow [2024-06-14 13:29:00,480 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 13:29:00,481 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:00,481 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 13:29:00,481 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:29:00,481 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:00,481 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:00,481 INFO L85 PathProgramCache]: Analyzing trace with hash 191694672, now seen corresponding path program 9 times [2024-06-14 13:29:00,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:00,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [187686553] [2024-06-14 13:29:00,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:00,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:00,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:01,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:01,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:01,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [187686553] [2024-06-14 13:29:01,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [187686553] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:01,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:01,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:29:01,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002457725] [2024-06-14 13:29:01,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:01,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:29:01,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:01,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:29:01,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:29:01,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:01,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 322 transitions, 4330 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 13:29:01,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:01,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:01,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:03,162 INFO L124 PetriNetUnfolderBase]: 3437/5360 cut-off events. [2024-06-14 13:29:03,163 INFO L125 PetriNetUnfolderBase]: For 410251/410278 co-relation queries the response was YES. [2024-06-14 13:29:03,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41392 conditions, 5360 events. 3437/5360 cut-off events. For 410251/410278 co-relation queries the response was YES. Maximal size of possible extension queue 286. Compared 30142 event pairs, 746 based on Foata normal form. 22/5368 useless extension candidates. Maximal degree in co-relation 41254. Up to 4878 conditions per place. [2024-06-14 13:29:03,236 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 292 selfloop transitions, 66 changer transitions 0/361 dead transitions. [2024-06-14 13:29:03,236 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 361 transitions, 5174 flow [2024-06-14 13:29:03,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:29:03,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:29:03,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 166 transitions. [2024-06-14 13:29:03,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40487804878048783 [2024-06-14 13:29:03,238 INFO L175 Difference]: Start difference. First operand has 283 places, 322 transitions, 4330 flow. Second operand 10 states and 166 transitions. [2024-06-14 13:29:03,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 361 transitions, 5174 flow [2024-06-14 13:29:04,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 361 transitions, 4811 flow, removed 37 selfloop flow, removed 11 redundant places. [2024-06-14 13:29:04,592 INFO L231 Difference]: Finished difference. Result has 282 places, 322 transitions, 4105 flow [2024-06-14 13:29:04,593 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3967, PETRI_DIFFERENCE_MINUEND_PLACES=272, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4105, PETRI_PLACES=282, PETRI_TRANSITIONS=322} [2024-06-14 13:29:04,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 13:29:04,593 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 322 transitions, 4105 flow [2024-06-14 13:29:04,593 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 13:29:04,593 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:04,593 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 13:29:04,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:29:04,593 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:04,593 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:04,594 INFO L85 PathProgramCache]: Analyzing trace with hash 926764732, now seen corresponding path program 10 times [2024-06-14 13:29:04,594 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:04,594 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541862545] [2024-06-14 13:29:04,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:04,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:04,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:05,950 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 13:29:05,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:05,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541862545] [2024-06-14 13:29:05,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [541862545] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:05,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:05,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:29:05,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [764134481] [2024-06-14 13:29:05,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:05,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:29:05,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:05,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:29:05,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:29:06,057 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:06,058 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 322 transitions, 4105 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 13:29:06,058 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:06,058 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:06,058 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:07,318 INFO L124 PetriNetUnfolderBase]: 3417/5328 cut-off events. [2024-06-14 13:29:07,318 INFO L125 PetriNetUnfolderBase]: For 396199/396226 co-relation queries the response was YES. [2024-06-14 13:29:07,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39418 conditions, 5328 events. 3417/5328 cut-off events. For 396199/396226 co-relation queries the response was YES. Maximal size of possible extension queue 285. Compared 29920 event pairs, 722 based on Foata normal form. 22/5336 useless extension candidates. Maximal degree in co-relation 39283. Up to 4846 conditions per place. [2024-06-14 13:29:07,388 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 69 changer transitions 0/355 dead transitions. [2024-06-14 13:29:07,389 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 355 transitions, 4805 flow [2024-06-14 13:29:07,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:29:07,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:29:07,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:29:07,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 13:29:07,390 INFO L175 Difference]: Start difference. First operand has 282 places, 322 transitions, 4105 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:29:07,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 355 transitions, 4805 flow [2024-06-14 13:29:08,448 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 355 transitions, 4637 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-06-14 13:29:08,453 INFO L231 Difference]: Finished difference. Result has 282 places, 321 transitions, 3963 flow [2024-06-14 13:29:08,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3821, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3963, PETRI_PLACES=282, PETRI_TRANSITIONS=321} [2024-06-14 13:29:08,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 13:29:08,453 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 321 transitions, 3963 flow [2024-06-14 13:29:08,454 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 13:29:08,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:08,454 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 13:29:08,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:29:08,454 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 13:29:08,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:08,455 INFO L85 PathProgramCache]: Analyzing trace with hash 2084691438, now seen corresponding path program 4 times [2024-06-14 13:29:08,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:08,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168410473] [2024-06-14 13:29:08,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:08,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:08,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:09,258 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 13:29:09,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:09,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168410473] [2024-06-14 13:29:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168410473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:09,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:09,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:09,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201985375] [2024-06-14 13:29:09,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:09,259 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:09,259 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:09,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:09,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:09,305 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:09,305 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 321 transitions, 3963 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 13:29:09,305 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:09,305 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:09,305 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:10,531 INFO L124 PetriNetUnfolderBase]: 3437/5351 cut-off events. [2024-06-14 13:29:10,531 INFO L125 PetriNetUnfolderBase]: For 391283/391287 co-relation queries the response was YES. [2024-06-14 13:29:10,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39606 conditions, 5351 events. 3437/5351 cut-off events. For 391283/391287 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 30023 event pairs, 761 based on Foata normal form. 8/5356 useless extension candidates. Maximal degree in co-relation 39470. Up to 5058 conditions per place. [2024-06-14 13:29:10,594 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 265 selfloop transitions, 84 changer transitions 0/352 dead transitions. [2024-06-14 13:29:10,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 352 transitions, 4932 flow [2024-06-14 13:29:10,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:29:10,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:29:10,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:29:10,595 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:29:10,595 INFO L175 Difference]: Start difference. First operand has 282 places, 321 transitions, 3963 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:29:10,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 352 transitions, 4932 flow [2024-06-14 13:29:11,574 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 281 places, 352 transitions, 4779 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:11,579 INFO L231 Difference]: Finished difference. Result has 282 places, 324 transitions, 4044 flow [2024-06-14 13:29:11,579 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3810, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=321, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=240, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4044, PETRI_PLACES=282, PETRI_TRANSITIONS=324} [2024-06-14 13:29:11,579 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 240 predicate places. [2024-06-14 13:29:11,579 INFO L495 AbstractCegarLoop]: Abstraction has has 282 places, 324 transitions, 4044 flow [2024-06-14 13:29:11,579 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 13:29:11,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:11,580 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 13:29:11,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:29:11,580 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:11,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:11,580 INFO L85 PathProgramCache]: Analyzing trace with hash 267647656, now seen corresponding path program 5 times [2024-06-14 13:29:11,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:11,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765940970] [2024-06-14 13:29:11,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:11,580 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:11,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:12,396 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:12,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:12,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765940970] [2024-06-14 13:29:12,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765940970] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:12,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:12,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:12,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319744836] [2024-06-14 13:29:12,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:12,397 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:12,397 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:12,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:12,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:12,462 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:12,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 282 places, 324 transitions, 4044 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 13:29:12,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:12,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:12,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:13,735 INFO L124 PetriNetUnfolderBase]: 3457/5381 cut-off events. [2024-06-14 13:29:13,735 INFO L125 PetriNetUnfolderBase]: For 402357/402359 co-relation queries the response was YES. [2024-06-14 13:29:13,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39848 conditions, 5381 events. 3457/5381 cut-off events. For 402357/402359 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 30234 event pairs, 773 based on Foata normal form. 6/5384 useless extension candidates. Maximal degree in co-relation 39711. Up to 5074 conditions per place. [2024-06-14 13:29:13,796 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 262 selfloop transitions, 84 changer transitions 0/349 dead transitions. [2024-06-14 13:29:13,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 349 transitions, 4991 flow [2024-06-14 13:29:13,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:29:13,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:29:13,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-14 13:29:13,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:29:13,797 INFO L175 Difference]: Start difference. First operand has 282 places, 324 transitions, 4044 flow. Second operand 7 states and 119 transitions. [2024-06-14 13:29:13,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 349 transitions, 4991 flow [2024-06-14 13:29:14,849 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 349 transitions, 4842 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:14,853 INFO L231 Difference]: Finished difference. Result has 283 places, 327 transitions, 4126 flow [2024-06-14 13:29:14,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3902, PETRI_DIFFERENCE_MINUEND_PLACES=276, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=324, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=243, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4126, PETRI_PLACES=283, PETRI_TRANSITIONS=327} [2024-06-14 13:29:14,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 13:29:14,853 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 327 transitions, 4126 flow [2024-06-14 13:29:14,853 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 13:29:14,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:14,854 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 13:29:14,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:29:14,854 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:14,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:14,854 INFO L85 PathProgramCache]: Analyzing trace with hash 280534666, now seen corresponding path program 6 times [2024-06-14 13:29:14,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:14,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116651320] [2024-06-14 13:29:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:14,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:14,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:15,693 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:15,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:15,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116651320] [2024-06-14 13:29:15,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116651320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:15,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:15,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:29:15,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783728172] [2024-06-14 13:29:15,694 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:15,694 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:29:15,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:15,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:29:15,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:29:15,767 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:15,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 327 transitions, 4126 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 13:29:15,768 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:15,768 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:15,768 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:16,887 INFO L124 PetriNetUnfolderBase]: 3445/5363 cut-off events. [2024-06-14 13:29:16,887 INFO L125 PetriNetUnfolderBase]: For 383064/383068 co-relation queries the response was YES. [2024-06-14 13:29:16,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39290 conditions, 5363 events. 3445/5363 cut-off events. For 383064/383068 co-relation queries the response was YES. Maximal size of possible extension queue 291. Compared 30135 event pairs, 771 based on Foata normal form. 8/5368 useless extension candidates. Maximal degree in co-relation 39154. Up to 5172 conditions per place. [2024-06-14 13:29:16,952 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 279 selfloop transitions, 69 changer transitions 0/351 dead transitions. [2024-06-14 13:29:16,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 351 transitions, 4904 flow [2024-06-14 13:29:16,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:29:16,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:29:16,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 110 transitions. [2024-06-14 13:29:16,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44715447154471544 [2024-06-14 13:29:16,954 INFO L175 Difference]: Start difference. First operand has 283 places, 327 transitions, 4126 flow. Second operand 6 states and 110 transitions. [2024-06-14 13:29:16,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 351 transitions, 4904 flow [2024-06-14 13:29:17,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 283 places, 351 transitions, 4746 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:17,690 INFO L231 Difference]: Finished difference. Result has 284 places, 327 transitions, 4156 flow [2024-06-14 13:29:17,691 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3968, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=258, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4156, PETRI_PLACES=284, PETRI_TRANSITIONS=327} [2024-06-14 13:29:17,691 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 242 predicate places. [2024-06-14 13:29:17,691 INFO L495 AbstractCegarLoop]: Abstraction has has 284 places, 327 transitions, 4156 flow [2024-06-14 13:29:17,691 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 13:29:17,691 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:17,692 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 13:29:17,692 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:29:17,692 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:29:17,692 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:17,693 INFO L85 PathProgramCache]: Analyzing trace with hash -1788920157, now seen corresponding path program 1 times [2024-06-14 13:29:17,693 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:17,693 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126048392] [2024-06-14 13:29:17,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:17,693 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:17,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:18,601 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 13:29:18,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:18,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126048392] [2024-06-14 13:29:18,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126048392] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:18,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:18,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:18,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260721716] [2024-06-14 13:29:18,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:18,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:18,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:18,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:18,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:18,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:29:18,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 284 places, 327 transitions, 4156 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:18,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:18,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:29:18,710 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:19,757 INFO L124 PetriNetUnfolderBase]: 3347/5274 cut-off events. [2024-06-14 13:29:19,758 INFO L125 PetriNetUnfolderBase]: For 387394/387410 co-relation queries the response was YES. [2024-06-14 13:29:19,805 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38686 conditions, 5274 events. 3347/5274 cut-off events. For 387394/387410 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30257 event pairs, 765 based on Foata normal form. 3/5270 useless extension candidates. Maximal degree in co-relation 38550. Up to 4980 conditions per place. [2024-06-14 13:29:19,824 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 283 selfloop transitions, 49 changer transitions 0/366 dead transitions. [2024-06-14 13:29:19,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 291 places, 366 transitions, 5498 flow [2024-06-14 13:29:19,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:19,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:19,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-14 13:29:19,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42073170731707316 [2024-06-14 13:29:19,825 INFO L175 Difference]: Start difference. First operand has 284 places, 327 transitions, 4156 flow. Second operand 8 states and 138 transitions. [2024-06-14 13:29:19,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 291 places, 366 transitions, 5498 flow [2024-06-14 13:29:20,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 366 transitions, 5296 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:20,868 INFO L231 Difference]: Finished difference. Result has 288 places, 339 transitions, 4301 flow [2024-06-14 13:29:20,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3954, PETRI_DIFFERENCE_MINUEND_PLACES=278, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=285, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4301, PETRI_PLACES=288, PETRI_TRANSITIONS=339} [2024-06-14 13:29:20,868 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 246 predicate places. [2024-06-14 13:29:20,868 INFO L495 AbstractCegarLoop]: Abstraction has has 288 places, 339 transitions, 4301 flow [2024-06-14 13:29:20,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:20,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:20,869 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 13:29:20,869 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:29:20,869 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 13:29:20,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:20,869 INFO L85 PathProgramCache]: Analyzing trace with hash -1788829947, now seen corresponding path program 2 times [2024-06-14 13:29:20,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:20,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30691253] [2024-06-14 13:29:20,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:20,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:21,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:21,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:21,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30691253] [2024-06-14 13:29:21,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30691253] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:21,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:21,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:21,956 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240256047] [2024-06-14 13:29:21,956 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:21,956 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:21,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:21,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:21,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:22,013 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:29:22,014 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 288 places, 339 transitions, 4301 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:22,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:22,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:29:22,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:23,080 INFO L124 PetriNetUnfolderBase]: 3355/5286 cut-off events. [2024-06-14 13:29:23,080 INFO L125 PetriNetUnfolderBase]: For 397269/397285 co-relation queries the response was YES. [2024-06-14 13:29:23,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39446 conditions, 5286 events. 3355/5286 cut-off events. For 397269/397285 co-relation queries the response was YES. Maximal size of possible extension queue 296. Compared 30338 event pairs, 765 based on Foata normal form. 2/5282 useless extension candidates. Maximal degree in co-relation 39307. Up to 5043 conditions per place. [2024-06-14 13:29:23,146 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 293 selfloop transitions, 36 changer transitions 0/363 dead transitions. [2024-06-14 13:29:23,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 363 transitions, 5071 flow [2024-06-14 13:29:23,146 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:23,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:23,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:29:23,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 13:29:23,147 INFO L175 Difference]: Start difference. First operand has 288 places, 339 transitions, 4301 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:29:23,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 363 transitions, 5071 flow [2024-06-14 13:29:23,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 363 transitions, 4999 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 13:29:23,998 INFO L231 Difference]: Finished difference. Result has 294 places, 342 transitions, 4359 flow [2024-06-14 13:29:23,999 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4237, PETRI_DIFFERENCE_MINUEND_PLACES=286, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=339, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=303, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4359, PETRI_PLACES=294, PETRI_TRANSITIONS=342} [2024-06-14 13:29:23,999 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 252 predicate places. [2024-06-14 13:29:23,999 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 342 transitions, 4359 flow [2024-06-14 13:29:23,999 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:23,999 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:23,999 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:29:23,999 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:29:23,999 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 13:29:24,000 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:24,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1785110877, now seen corresponding path program 3 times [2024-06-14 13:29:24,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:24,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [360718056] [2024-06-14 13:29:24,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:24,000 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:24,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:24,971 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:24,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:24,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [360718056] [2024-06-14 13:29:24,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [360718056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:24,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:24,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:24,972 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1341905022] [2024-06-14 13:29:24,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:24,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:24,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:24,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:24,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:25,097 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:29:25,097 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 342 transitions, 4359 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:25,097 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:25,097 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:29:25,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:26,186 INFO L124 PetriNetUnfolderBase]: 3368/5305 cut-off events. [2024-06-14 13:29:26,186 INFO L125 PetriNetUnfolderBase]: For 407821/407821 co-relation queries the response was YES. [2024-06-14 13:29:26,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39792 conditions, 5305 events. 3368/5305 cut-off events. For 407821/407821 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30410 event pairs, 769 based on Foata normal form. 3/5302 useless extension candidates. Maximal degree in co-relation 39651. Up to 5078 conditions per place. [2024-06-14 13:29:26,251 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 297 selfloop transitions, 33 changer transitions 0/364 dead transitions. [2024-06-14 13:29:26,251 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 364 transitions, 5259 flow [2024-06-14 13:29:26,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:26,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:26,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:29:26,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:29:26,252 INFO L175 Difference]: Start difference. First operand has 294 places, 342 transitions, 4359 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:29:26,252 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 364 transitions, 5259 flow [2024-06-14 13:29:27,175 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 364 transitions, 5165 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:27,179 INFO L231 Difference]: Finished difference. Result has 296 places, 345 transitions, 4387 flow [2024-06-14 13:29:27,179 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4265, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=309, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4387, PETRI_PLACES=296, PETRI_TRANSITIONS=345} [2024-06-14 13:29:27,180 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:29:27,180 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 345 transitions, 4387 flow [2024-06-14 13:29:27,180 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:27,180 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:27,180 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 13:29:27,180 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:29:27,181 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 13:29:27,181 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:27,181 INFO L85 PathProgramCache]: Analyzing trace with hash 273361979, now seen corresponding path program 4 times [2024-06-14 13:29:27,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:27,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753991179] [2024-06-14 13:29:27,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:27,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:27,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:28,080 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:28,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:28,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753991179] [2024-06-14 13:29:28,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753991179] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:28,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:28,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:28,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622924308] [2024-06-14 13:29:28,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:28,081 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:28,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:28,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:28,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:28,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:29:28,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 345 transitions, 4387 flow. Second operand has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:28,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:28,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:29:28,174 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:29,275 INFO L124 PetriNetUnfolderBase]: 3353/5286 cut-off events. [2024-06-14 13:29:29,275 INFO L125 PetriNetUnfolderBase]: For 411339/411339 co-relation queries the response was YES. [2024-06-14 13:29:29,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39571 conditions, 5286 events. 3353/5286 cut-off events. For 411339/411339 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30394 event pairs, 768 based on Foata normal form. 3/5283 useless extension candidates. Maximal degree in co-relation 39429. Up to 5040 conditions per place. [2024-06-14 13:29:29,342 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 298 selfloop transitions, 37 changer transitions 0/369 dead transitions. [2024-06-14 13:29:29,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 369 transitions, 5411 flow [2024-06-14 13:29:29,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:29:29,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:29:29,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-14 13:29:29,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43205574912891986 [2024-06-14 13:29:29,343 INFO L175 Difference]: Start difference. First operand has 296 places, 345 transitions, 4387 flow. Second operand 7 states and 124 transitions. [2024-06-14 13:29:29,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 369 transitions, 5411 flow [2024-06-14 13:29:30,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 296 places, 369 transitions, 5295 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:30,212 INFO L231 Difference]: Finished difference. Result has 297 places, 345 transitions, 4356 flow [2024-06-14 13:29:30,212 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4271, PETRI_DIFFERENCE_MINUEND_PLACES=290, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4356, PETRI_PLACES=297, PETRI_TRANSITIONS=345} [2024-06-14 13:29:30,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-14 13:29:30,213 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 345 transitions, 4356 flow [2024-06-14 13:29:30,213 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 9.777777777777779) internal successors, (88), 9 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:29:30,213 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:30,213 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 13:29:30,213 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:29:30,213 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 13:29:30,213 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:30,213 INFO L85 PathProgramCache]: Analyzing trace with hash 1082662301, now seen corresponding path program 1 times [2024-06-14 13:29:30,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:30,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067469571] [2024-06-14 13:29:30,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:30,214 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:30,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:31,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:31,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:31,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067469571] [2024-06-14 13:29:31,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067469571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:31,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:31,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:31,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454677751] [2024-06-14 13:29:31,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:31,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:31,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:31,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:31,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:31,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:31,253 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 345 transitions, 4356 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 13:29:31,253 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:31,253 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:31,253 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:32,248 INFO L124 PetriNetUnfolderBase]: 3480/5417 cut-off events. [2024-06-14 13:29:32,248 INFO L125 PetriNetUnfolderBase]: For 414574/414574 co-relation queries the response was YES. [2024-06-14 13:29:32,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40436 conditions, 5417 events. 3480/5417 cut-off events. For 414574/414574 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 30528 event pairs, 805 based on Foata normal form. 1/5415 useless extension candidates. Maximal degree in co-relation 40293. Up to 5353 conditions per place. [2024-06-14 13:29:32,318 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 328 selfloop transitions, 26 changer transitions 0/357 dead transitions. [2024-06-14 13:29:32,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 301 places, 357 transitions, 5102 flow [2024-06-14 13:29:32,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:29:32,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:29:32,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 86 transitions. [2024-06-14 13:29:32,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4195121951219512 [2024-06-14 13:29:32,319 INFO L175 Difference]: Start difference. First operand has 297 places, 345 transitions, 4356 flow. Second operand 5 states and 86 transitions. [2024-06-14 13:29:32,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 301 places, 357 transitions, 5102 flow [2024-06-14 13:29:33,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 357 transitions, 4975 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:33,419 INFO L231 Difference]: Finished difference. Result has 296 places, 345 transitions, 4302 flow [2024-06-14 13:29:33,419 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4229, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=319, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4302, PETRI_PLACES=296, PETRI_TRANSITIONS=345} [2024-06-14 13:29:33,419 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 254 predicate places. [2024-06-14 13:29:33,419 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 345 transitions, 4302 flow [2024-06-14 13:29:33,420 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 13:29:33,420 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:33,420 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 13:29:33,420 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:29:33,420 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 13:29:33,420 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:33,421 INFO L85 PathProgramCache]: Analyzing trace with hash -1976581107, now seen corresponding path program 1 times [2024-06-14 13:29:33,421 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:33,421 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006375326] [2024-06-14 13:29:33,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:33,421 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:33,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:34,181 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 13:29:34,181 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:34,181 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006375326] [2024-06-14 13:29:34,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006375326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:34,181 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:34,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:34,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657106920] [2024-06-14 13:29:34,181 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:34,181 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:34,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:34,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:34,182 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:34,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:34,244 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 345 transitions, 4302 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 13:29:34,244 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:34,244 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:34,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:35,364 INFO L124 PetriNetUnfolderBase]: 3493/5431 cut-off events. [2024-06-14 13:29:35,364 INFO L125 PetriNetUnfolderBase]: For 428292/428296 co-relation queries the response was YES. [2024-06-14 13:29:35,421 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40806 conditions, 5431 events. 3493/5431 cut-off events. For 428292/428296 co-relation queries the response was YES. Maximal size of possible extension queue 297. Compared 30602 event pairs, 774 based on Foata normal form. 5/5433 useless extension candidates. Maximal degree in co-relation 40662. Up to 5341 conditions per place. [2024-06-14 13:29:35,443 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 339 selfloop transitions, 34 changer transitions 0/376 dead transitions. [2024-06-14 13:29:35,443 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 303 places, 376 transitions, 5444 flow [2024-06-14 13:29:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:35,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:35,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-14 13:29:35,444 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3871951219512195 [2024-06-14 13:29:35,444 INFO L175 Difference]: Start difference. First operand has 296 places, 345 transitions, 4302 flow. Second operand 8 states and 127 transitions. [2024-06-14 13:29:35,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 303 places, 376 transitions, 5444 flow [2024-06-14 13:29:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 299 places, 376 transitions, 5392 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:29:36,619 INFO L231 Difference]: Finished difference. Result has 300 places, 351 transitions, 4502 flow [2024-06-14 13:29:36,619 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4250, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=314, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4502, PETRI_PLACES=300, PETRI_TRANSITIONS=351} [2024-06-14 13:29:36,620 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 258 predicate places. [2024-06-14 13:29:36,620 INFO L495 AbstractCegarLoop]: Abstraction has has 300 places, 351 transitions, 4502 flow [2024-06-14 13:29:36,620 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 13:29:36,620 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:36,620 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 13:29:36,620 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:29:36,620 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 13:29:36,620 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:36,620 INFO L85 PathProgramCache]: Analyzing trace with hash -1120457665, now seen corresponding path program 1 times [2024-06-14 13:29:36,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:36,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478089679] [2024-06-14 13:29:36,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:36,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:36,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:37,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:37,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:37,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478089679] [2024-06-14 13:29:37,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [478089679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:37,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:37,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:37,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66205642] [2024-06-14 13:29:37,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:37,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:37,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:37,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:37,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:37,469 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:37,469 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 300 places, 351 transitions, 4502 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 13:29:37,469 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:37,469 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:37,469 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:38,604 INFO L124 PetriNetUnfolderBase]: 3524/5474 cut-off events. [2024-06-14 13:29:38,604 INFO L125 PetriNetUnfolderBase]: For 450441/450445 co-relation queries the response was YES. [2024-06-14 13:29:38,656 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41768 conditions, 5474 events. 3524/5474 cut-off events. For 450441/450445 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30862 event pairs, 762 based on Foata normal form. 6/5477 useless extension candidates. Maximal degree in co-relation 41623. Up to 5364 conditions per place. [2024-06-14 13:29:38,675 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 40 changer transitions 0/391 dead transitions. [2024-06-14 13:29:38,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 307 places, 391 transitions, 5732 flow [2024-06-14 13:29:38,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:38,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:29:38,676 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:29:38,676 INFO L175 Difference]: Start difference. First operand has 300 places, 351 transitions, 4502 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:29:38,676 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 307 places, 391 transitions, 5732 flow [2024-06-14 13:29:39,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 391 transitions, 5606 flow, removed 45 selfloop flow, removed 4 redundant places. [2024-06-14 13:29:39,687 INFO L231 Difference]: Finished difference. Result has 306 places, 367 transitions, 4738 flow [2024-06-14 13:29:39,687 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4379, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=351, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=316, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4738, PETRI_PLACES=306, PETRI_TRANSITIONS=367} [2024-06-14 13:29:39,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 264 predicate places. [2024-06-14 13:29:39,687 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 367 transitions, 4738 flow [2024-06-14 13:29:39,688 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 13:29:39,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:39,688 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 13:29:39,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:29:39,688 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 13:29:39,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:39,688 INFO L85 PathProgramCache]: Analyzing trace with hash -1120457851, now seen corresponding path program 2 times [2024-06-14 13:29:39,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:39,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380348434] [2024-06-14 13:29:39,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:39,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:39,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:40,483 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:40,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:40,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380348434] [2024-06-14 13:29:40,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380348434] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:40,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:40,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:40,484 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399186575] [2024-06-14 13:29:40,484 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:40,484 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:40,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:40,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:40,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:40,537 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:40,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 367 transitions, 4738 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 13:29:40,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:40,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:40,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:41,836 INFO L124 PetriNetUnfolderBase]: 3529/5481 cut-off events. [2024-06-14 13:29:41,836 INFO L125 PetriNetUnfolderBase]: For 461504/461508 co-relation queries the response was YES. [2024-06-14 13:29:41,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42468 conditions, 5481 events. 3529/5481 cut-off events. For 461504/461508 co-relation queries the response was YES. Maximal size of possible extension queue 300. Compared 30955 event pairs, 763 based on Foata normal form. 5/5483 useless extension candidates. Maximal degree in co-relation 42319. Up to 5403 conditions per place. [2024-06-14 13:29:41,909 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 356 selfloop transitions, 32 changer transitions 0/391 dead transitions. [2024-06-14 13:29:41,909 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 313 places, 391 transitions, 5664 flow [2024-06-14 13:29:41,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:41,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:41,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 122 transitions. [2024-06-14 13:29:41,910 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3719512195121951 [2024-06-14 13:29:41,910 INFO L175 Difference]: Start difference. First operand has 306 places, 367 transitions, 4738 flow. Second operand 8 states and 122 transitions. [2024-06-14 13:29:41,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 313 places, 391 transitions, 5664 flow [2024-06-14 13:29:42,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 311 places, 391 transitions, 5578 flow, removed 38 selfloop flow, removed 2 redundant places. [2024-06-14 13:29:42,945 INFO L231 Difference]: Finished difference. Result has 312 places, 370 transitions, 4810 flow [2024-06-14 13:29:42,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4652, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=367, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4810, PETRI_PLACES=312, PETRI_TRANSITIONS=370} [2024-06-14 13:29:42,945 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 270 predicate places. [2024-06-14 13:29:42,945 INFO L495 AbstractCegarLoop]: Abstraction has has 312 places, 370 transitions, 4810 flow [2024-06-14 13:29:42,945 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 13:29:42,945 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:42,946 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 13:29:42,946 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:29:42,946 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 13:29:42,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:42,946 INFO L85 PathProgramCache]: Analyzing trace with hash -943088995, now seen corresponding path program 2 times [2024-06-14 13:29:42,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:42,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126236456] [2024-06-14 13:29:42,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:42,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:42,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:43,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:43,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:43,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126236456] [2024-06-14 13:29:43,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126236456] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:43,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:43,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:43,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363226282] [2024-06-14 13:29:43,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:43,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:43,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:43,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:43,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:43,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:43,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 312 places, 370 transitions, 4810 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 13:29:43,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:43,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:43,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:45,066 INFO L124 PetriNetUnfolderBase]: 3539/5495 cut-off events. [2024-06-14 13:29:45,066 INFO L125 PetriNetUnfolderBase]: For 475976/475980 co-relation queries the response was YES. [2024-06-14 13:29:45,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42722 conditions, 5495 events. 3539/5495 cut-off events. For 475976/475980 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31011 event pairs, 765 based on Foata normal form. 6/5498 useless extension candidates. Maximal degree in co-relation 42571. Up to 5424 conditions per place. [2024-06-14 13:29:45,135 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 33 changer transitions 0/393 dead transitions. [2024-06-14 13:29:45,135 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 319 places, 393 transitions, 5717 flow [2024-06-14 13:29:45,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:45,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:45,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:29:45,136 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 13:29:45,136 INFO L175 Difference]: Start difference. First operand has 312 places, 370 transitions, 4810 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:29:45,136 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 319 places, 393 transitions, 5717 flow [2024-06-14 13:29:46,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 393 transitions, 5579 flow, removed 36 selfloop flow, removed 7 redundant places. [2024-06-14 13:29:46,294 INFO L231 Difference]: Finished difference. Result has 313 places, 374 transitions, 4813 flow [2024-06-14 13:29:46,294 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4672, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=338, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4813, PETRI_PLACES=313, PETRI_TRANSITIONS=374} [2024-06-14 13:29:46,294 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 271 predicate places. [2024-06-14 13:29:46,294 INFO L495 AbstractCegarLoop]: Abstraction has has 313 places, 374 transitions, 4813 flow [2024-06-14 13:29:46,294 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 13:29:46,294 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:46,294 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 13:29:46,295 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:29:46,295 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 13:29:46,295 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:46,295 INFO L85 PathProgramCache]: Analyzing trace with hash -1737116809, now seen corresponding path program 3 times [2024-06-14 13:29:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:46,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468559368] [2024-06-14 13:29:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:46,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:46,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:47,051 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:47,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:47,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468559368] [2024-06-14 13:29:47,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468559368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:47,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:47,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:47,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970851591] [2024-06-14 13:29:47,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:47,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:47,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:47,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:47,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:47,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:47,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 313 places, 374 transitions, 4813 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 13:29:47,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:47,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:47,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:48,420 INFO L124 PetriNetUnfolderBase]: 3549/5509 cut-off events. [2024-06-14 13:29:48,420 INFO L125 PetriNetUnfolderBase]: For 484690/484694 co-relation queries the response was YES. [2024-06-14 13:29:48,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42977 conditions, 5509 events. 3549/5509 cut-off events. For 484690/484694 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 31113 event pairs, 762 based on Foata normal form. 5/5511 useless extension candidates. Maximal degree in co-relation 42826. Up to 5450 conditions per place. [2024-06-14 13:29:48,487 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 368 selfloop transitions, 27 changer transitions 0/398 dead transitions. [2024-06-14 13:29:48,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 320 places, 398 transitions, 5785 flow [2024-06-14 13:29:48,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:48,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:48,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 118 transitions. [2024-06-14 13:29:48,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3597560975609756 [2024-06-14 13:29:48,489 INFO L175 Difference]: Start difference. First operand has 313 places, 374 transitions, 4813 flow. Second operand 8 states and 118 transitions. [2024-06-14 13:29:48,489 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 320 places, 398 transitions, 5785 flow [2024-06-14 13:29:49,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 398 transitions, 5676 flow, removed 23 selfloop flow, removed 5 redundant places. [2024-06-14 13:29:49,719 INFO L231 Difference]: Finished difference. Result has 317 places, 380 transitions, 4905 flow [2024-06-14 13:29:49,720 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=374, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4905, PETRI_PLACES=317, PETRI_TRANSITIONS=380} [2024-06-14 13:29:49,720 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 275 predicate places. [2024-06-14 13:29:49,721 INFO L495 AbstractCegarLoop]: Abstraction has has 317 places, 380 transitions, 4905 flow [2024-06-14 13:29:49,721 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 13:29:49,721 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:49,721 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 13:29:49,721 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:29:49,721 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 13:29:49,722 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:49,722 INFO L85 PathProgramCache]: Analyzing trace with hash -943326145, now seen corresponding path program 3 times [2024-06-14 13:29:49,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:49,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331553960] [2024-06-14 13:29:49,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:49,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:49,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:50,505 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:50,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:50,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331553960] [2024-06-14 13:29:50,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331553960] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:50,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:50,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:50,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790955566] [2024-06-14 13:29:50,506 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:50,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:50,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:50,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:50,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:50,570 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:50,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 317 places, 380 transitions, 4905 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 13:29:50,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:50,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:50,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:51,754 INFO L124 PetriNetUnfolderBase]: 3559/5523 cut-off events. [2024-06-14 13:29:51,755 INFO L125 PetriNetUnfolderBase]: For 496309/496313 co-relation queries the response was YES. [2024-06-14 13:29:51,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43200 conditions, 5523 events. 3559/5523 cut-off events. For 496309/496313 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 31070 event pairs, 765 based on Foata normal form. 6/5526 useless extension candidates. Maximal degree in co-relation 43047. Up to 5441 conditions per place. [2024-06-14 13:29:51,831 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 37 changer transitions 0/403 dead transitions. [2024-06-14 13:29:51,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 403 transitions, 5839 flow [2024-06-14 13:29:51,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:51,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:51,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:29:51,832 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 13:29:51,833 INFO L175 Difference]: Start difference. First operand has 317 places, 380 transitions, 4905 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:29:51,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 403 transitions, 5839 flow [2024-06-14 13:29:53,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 403 transitions, 5700 flow, removed 41 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:53,404 INFO L231 Difference]: Finished difference. Result has 319 places, 383 transitions, 4916 flow [2024-06-14 13:29:53,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4766, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=380, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4916, PETRI_PLACES=319, PETRI_TRANSITIONS=383} [2024-06-14 13:29:53,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 13:29:53,405 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 383 transitions, 4916 flow [2024-06-14 13:29:53,405 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 13:29:53,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:53,405 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 13:29:53,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:29:53,405 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 13:29:53,405 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:53,406 INFO L85 PathProgramCache]: Analyzing trace with hash -943080067, now seen corresponding path program 1 times [2024-06-14 13:29:53,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:53,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401678665] [2024-06-14 13:29:53,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:53,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:53,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:54,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:54,474 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:54,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401678665] [2024-06-14 13:29:54,474 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401678665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:54,474 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:54,474 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:29:54,474 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417122180] [2024-06-14 13:29:54,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:54,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:29:54,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:54,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:29:54,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:29:54,552 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:54,553 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 383 transitions, 4916 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:29:54,553 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:54,553 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:54,553 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:55,892 INFO L124 PetriNetUnfolderBase]: 3567/5535 cut-off events. [2024-06-14 13:29:55,892 INFO L125 PetriNetUnfolderBase]: For 508214/508218 co-relation queries the response was YES. [2024-06-14 13:29:55,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43425 conditions, 5535 events. 3567/5535 cut-off events. For 508214/508218 co-relation queries the response was YES. Maximal size of possible extension queue 304. Compared 31183 event pairs, 766 based on Foata normal form. 6/5538 useless extension candidates. Maximal degree in co-relation 43272. Up to 5450 conditions per place. [2024-06-14 13:29:55,974 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 360 selfloop transitions, 41 changer transitions 0/404 dead transitions. [2024-06-14 13:29:55,975 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 326 places, 404 transitions, 5822 flow [2024-06-14 13:29:55,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:55,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:55,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-14 13:29:55,976 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.375 [2024-06-14 13:29:55,976 INFO L175 Difference]: Start difference. First operand has 319 places, 383 transitions, 4916 flow. Second operand 8 states and 123 transitions. [2024-06-14 13:29:55,976 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 326 places, 404 transitions, 5822 flow [2024-06-14 13:29:57,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 404 transitions, 5700 flow, removed 26 selfloop flow, removed 6 redundant places. [2024-06-14 13:29:57,286 INFO L231 Difference]: Finished difference. Result has 321 places, 385 transitions, 4929 flow [2024-06-14 13:29:57,286 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4794, PETRI_DIFFERENCE_MINUEND_PLACES=313, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=383, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4929, PETRI_PLACES=321, PETRI_TRANSITIONS=385} [2024-06-14 13:29:57,286 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 13:29:57,286 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 385 transitions, 4929 flow [2024-06-14 13:29:57,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:29:57,286 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:29:57,286 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 13:29:57,287 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:29:57,287 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 13:29:57,287 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:29:57,287 INFO L85 PathProgramCache]: Analyzing trace with hash 369410935, now seen corresponding path program 4 times [2024-06-14 13:29:57,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:29:57,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362292631] [2024-06-14 13:29:57,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:29:57,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:29:57,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:29:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:29:58,090 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:29:58,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362292631] [2024-06-14 13:29:58,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362292631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:29:58,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:29:58,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:29:58,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159406863] [2024-06-14 13:29:58,091 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:29:58,091 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:29:58,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:29:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:29:58,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:29:58,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:29:58,179 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 385 transitions, 4929 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 13:29:58,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:29:58,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:29:58,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:29:59,297 INFO L124 PetriNetUnfolderBase]: 3580/5555 cut-off events. [2024-06-14 13:29:59,297 INFO L125 PetriNetUnfolderBase]: For 523157/523193 co-relation queries the response was YES. [2024-06-14 13:29:59,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43956 conditions, 5555 events. 3580/5555 cut-off events. For 523157/523193 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 31302 event pairs, 770 based on Foata normal form. 25/5573 useless extension candidates. Maximal degree in co-relation 43802. Up to 5371 conditions per place. [2024-06-14 13:29:59,381 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 347 selfloop transitions, 74 changer transitions 0/424 dead transitions. [2024-06-14 13:29:59,381 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 424 transitions, 6506 flow [2024-06-14 13:29:59,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:29:59,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:29:59,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:29:59,382 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:29:59,382 INFO L175 Difference]: Start difference. First operand has 321 places, 385 transitions, 4929 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:29:59,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 424 transitions, 6506 flow [2024-06-14 13:30:00,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 322 places, 424 transitions, 6387 flow, removed 20 selfloop flow, removed 6 redundant places. [2024-06-14 13:30:00,787 INFO L231 Difference]: Finished difference. Result has 324 places, 400 transitions, 5361 flow [2024-06-14 13:30:00,787 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4810, PETRI_DIFFERENCE_MINUEND_PLACES=315, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5361, PETRI_PLACES=324, PETRI_TRANSITIONS=400} [2024-06-14 13:30:00,787 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 13:30:00,787 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 400 transitions, 5361 flow [2024-06-14 13:30:00,787 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 13:30:00,787 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:00,787 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 13:30:00,787 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:30:00,788 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 13:30:00,788 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:00,788 INFO L85 PathProgramCache]: Analyzing trace with hash 380838775, now seen corresponding path program 5 times [2024-06-14 13:30:00,788 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:00,788 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968369497] [2024-06-14 13:30:00,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:00,788 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:00,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:01,601 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 13:30:01,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:01,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968369497] [2024-06-14 13:30:01,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968369497] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:01,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:01,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:01,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243807520] [2024-06-14 13:30:01,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:01,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:01,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:01,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:01,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:01,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:01,669 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 400 transitions, 5361 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 13:30:01,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:01,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:01,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:02,861 INFO L124 PetriNetUnfolderBase]: 3593/5573 cut-off events. [2024-06-14 13:30:02,861 INFO L125 PetriNetUnfolderBase]: For 541968/542004 co-relation queries the response was YES. [2024-06-14 13:30:02,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44848 conditions, 5573 events. 3593/5573 cut-off events. For 541968/542004 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31404 event pairs, 766 based on Foata normal form. 25/5591 useless extension candidates. Maximal degree in co-relation 44692. Up to 5386 conditions per place. [2024-06-14 13:30:02,938 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 344 selfloop transitions, 80 changer transitions 0/427 dead transitions. [2024-06-14 13:30:02,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 427 transitions, 6802 flow [2024-06-14 13:30:02,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:02,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:02,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-14 13:30:02,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38109756097560976 [2024-06-14 13:30:02,939 INFO L175 Difference]: Start difference. First operand has 324 places, 400 transitions, 5361 flow. Second operand 8 states and 125 transitions. [2024-06-14 13:30:02,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 427 transitions, 6802 flow [2024-06-14 13:30:04,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 427 transitions, 6582 flow, removed 72 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:04,673 INFO L231 Difference]: Finished difference. Result has 328 places, 406 transitions, 5514 flow [2024-06-14 13:30:04,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5167, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=400, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5514, PETRI_PLACES=328, PETRI_TRANSITIONS=406} [2024-06-14 13:30:04,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 286 predicate places. [2024-06-14 13:30:04,673 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 406 transitions, 5514 flow [2024-06-14 13:30:04,673 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 13:30:04,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:04,673 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 13:30:04,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:30:04,674 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 13:30:04,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:04,674 INFO L85 PathProgramCache]: Analyzing trace with hash 141509785, now seen corresponding path program 6 times [2024-06-14 13:30:04,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:04,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925302138] [2024-06-14 13:30:04,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:04,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:04,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:05,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:05,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925302138] [2024-06-14 13:30:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925302138] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:05,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:05,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:05,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376010219] [2024-06-14 13:30:05,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:05,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:05,556 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:05,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 406 transitions, 5514 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 13:30:05,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:05,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:05,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:06,720 INFO L124 PetriNetUnfolderBase]: 3590/5569 cut-off events. [2024-06-14 13:30:06,720 INFO L125 PetriNetUnfolderBase]: For 549329/549365 co-relation queries the response was YES. [2024-06-14 13:30:06,779 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44753 conditions, 5569 events. 3590/5569 cut-off events. For 549329/549365 co-relation queries the response was YES. Maximal size of possible extension queue 307. Compared 31370 event pairs, 764 based on Foata normal form. 25/5587 useless extension candidates. Maximal degree in co-relation 44596. Up to 5383 conditions per place. [2024-06-14 13:30:06,964 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 352 selfloop transitions, 78 changer transitions 0/433 dead transitions. [2024-06-14 13:30:06,964 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 335 places, 433 transitions, 6992 flow [2024-06-14 13:30:06,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:06,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:06,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-14 13:30:06,965 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39634146341463417 [2024-06-14 13:30:06,966 INFO L175 Difference]: Start difference. First operand has 328 places, 406 transitions, 5514 flow. Second operand 8 states and 130 transitions. [2024-06-14 13:30:06,966 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 335 places, 433 transitions, 6992 flow [2024-06-14 13:30:08,696 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 433 transitions, 6724 flow, removed 81 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:08,702 INFO L231 Difference]: Finished difference. Result has 332 places, 408 transitions, 5462 flow [2024-06-14 13:30:08,702 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5266, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=406, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=330, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5462, PETRI_PLACES=332, PETRI_TRANSITIONS=408} [2024-06-14 13:30:08,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-14 13:30:08,702 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 408 transitions, 5462 flow [2024-06-14 13:30:08,703 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 13:30:08,703 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:08,703 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 13:30:08,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:30:08,703 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 13:30:08,703 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:08,703 INFO L85 PathProgramCache]: Analyzing trace with hash 483928531, now seen corresponding path program 4 times [2024-06-14 13:30:08,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:08,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209523489] [2024-06-14 13:30:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:08,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:08,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:09,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:09,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:09,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209523489] [2024-06-14 13:30:09,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209523489] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:09,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:09,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:09,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843238632] [2024-06-14 13:30:09,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:09,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:09,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:09,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:09,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:09,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:09,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 408 transitions, 5462 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 13:30:09,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:09,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:09,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:10,717 INFO L124 PetriNetUnfolderBase]: 3613/5601 cut-off events. [2024-06-14 13:30:10,717 INFO L125 PetriNetUnfolderBase]: For 568935/568971 co-relation queries the response was YES. [2024-06-14 13:30:10,778 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45182 conditions, 5601 events. 3613/5601 cut-off events. For 568935/568971 co-relation queries the response was YES. Maximal size of possible extension queue 311. Compared 31620 event pairs, 767 based on Foata normal form. 26/5620 useless extension candidates. Maximal degree in co-relation 45024. Up to 5409 conditions per place. [2024-06-14 13:30:10,799 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 368 selfloop transitions, 70 changer transitions 0/441 dead transitions. [2024-06-14 13:30:10,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 441 transitions, 6927 flow [2024-06-14 13:30:10,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:10,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:10,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-14 13:30:10,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3932926829268293 [2024-06-14 13:30:10,800 INFO L175 Difference]: Start difference. First operand has 332 places, 408 transitions, 5462 flow. Second operand 8 states and 129 transitions. [2024-06-14 13:30:10,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 441 transitions, 6927 flow [2024-06-14 13:30:12,865 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 335 places, 441 transitions, 6800 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:12,871 INFO L231 Difference]: Finished difference. Result has 337 places, 417 transitions, 5670 flow [2024-06-14 13:30:12,871 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5340, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=408, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5670, PETRI_PLACES=337, PETRI_TRANSITIONS=417} [2024-06-14 13:30:12,871 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:30:12,871 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 417 transitions, 5670 flow [2024-06-14 13:30:12,871 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 13:30:12,872 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:12,872 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 13:30:12,872 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:30:12,872 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 13:30:12,872 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:12,872 INFO L85 PathProgramCache]: Analyzing trace with hash -1529398855, now seen corresponding path program 7 times [2024-06-14 13:30:12,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:12,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186006279] [2024-06-14 13:30:12,872 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:12,872 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:12,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:13,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:13,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186006279] [2024-06-14 13:30:13,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186006279] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:13,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:13,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:13,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50246361] [2024-06-14 13:30:13,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:13,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:13,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:13,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:13,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:13,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:13,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 417 transitions, 5670 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 13:30:13,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:13,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:13,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:15,006 INFO L124 PetriNetUnfolderBase]: 3618/5608 cut-off events. [2024-06-14 13:30:15,006 INFO L125 PetriNetUnfolderBase]: For 580686/580722 co-relation queries the response was YES. [2024-06-14 13:30:15,066 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45678 conditions, 5608 events. 3618/5608 cut-off events. For 580686/580722 co-relation queries the response was YES. Maximal size of possible extension queue 312. Compared 31622 event pairs, 769 based on Foata normal form. 25/5626 useless extension candidates. Maximal degree in co-relation 45518. Up to 5495 conditions per place. [2024-06-14 13:30:15,086 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 388 selfloop transitions, 48 changer transitions 0/439 dead transitions. [2024-06-14 13:30:15,086 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 344 places, 439 transitions, 6697 flow [2024-06-14 13:30:15,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:15,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:15,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-14 13:30:15,087 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36890243902439024 [2024-06-14 13:30:15,087 INFO L175 Difference]: Start difference. First operand has 337 places, 417 transitions, 5670 flow. Second operand 8 states and 121 transitions. [2024-06-14 13:30:15,087 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 344 places, 439 transitions, 6697 flow [2024-06-14 13:30:17,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 340 places, 439 transitions, 6494 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:17,201 INFO L231 Difference]: Finished difference. Result has 341 places, 420 transitions, 5668 flow [2024-06-14 13:30:17,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5467, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=369, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5668, PETRI_PLACES=341, PETRI_TRANSITIONS=420} [2024-06-14 13:30:17,202 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 299 predicate places. [2024-06-14 13:30:17,202 INFO L495 AbstractCegarLoop]: Abstraction has has 341 places, 420 transitions, 5668 flow [2024-06-14 13:30:17,202 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 13:30:17,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:17,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:17,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:30:17,202 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 13:30:17,203 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:17,203 INFO L85 PathProgramCache]: Analyzing trace with hash 1609385315, now seen corresponding path program 8 times [2024-06-14 13:30:17,203 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:17,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327135876] [2024-06-14 13:30:17,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:17,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:18,048 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:18,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:18,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327135876] [2024-06-14 13:30:18,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1327135876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:18,048 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:18,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:18,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853226616] [2024-06-14 13:30:18,048 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:18,048 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:18,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:18,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:18,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:18,139 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:18,139 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 341 places, 420 transitions, 5668 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 13:30:18,139 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:18,139 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:18,139 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:19,436 INFO L124 PetriNetUnfolderBase]: 3636/5633 cut-off events. [2024-06-14 13:30:19,436 INFO L125 PetriNetUnfolderBase]: For 594930/594966 co-relation queries the response was YES. [2024-06-14 13:30:19,498 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45816 conditions, 5633 events. 3636/5633 cut-off events. For 594930/594966 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 31788 event pairs, 769 based on Foata normal form. 25/5651 useless extension candidates. Maximal degree in co-relation 45655. Up to 5506 conditions per place. [2024-06-14 13:30:19,518 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 383 selfloop transitions, 64 changer transitions 0/450 dead transitions. [2024-06-14 13:30:19,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 450 transitions, 7047 flow [2024-06-14 13:30:19,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:30:19,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:30:19,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 142 transitions. [2024-06-14 13:30:19,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3463414634146341 [2024-06-14 13:30:19,520 INFO L175 Difference]: Start difference. First operand has 341 places, 420 transitions, 5668 flow. Second operand 10 states and 142 transitions. [2024-06-14 13:30:19,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 450 transitions, 7047 flow [2024-06-14 13:30:21,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 450 transitions, 6865 flow, removed 38 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:21,528 INFO L231 Difference]: Finished difference. Result has 346 places, 431 transitions, 5909 flow [2024-06-14 13:30:21,528 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5496, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=5909, PETRI_PLACES=346, PETRI_TRANSITIONS=431} [2024-06-14 13:30:21,529 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:30:21,529 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 431 transitions, 5909 flow [2024-06-14 13:30:21,529 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 13:30:21,529 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:21,529 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 13:30:21,529 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:30:21,529 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 13:30:21,530 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:21,530 INFO L85 PathProgramCache]: Analyzing trace with hash 1953471551, now seen corresponding path program 5 times [2024-06-14 13:30:21,530 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:21,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320385477] [2024-06-14 13:30:21,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:21,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:21,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:22,332 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 13:30:22,333 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:22,333 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320385477] [2024-06-14 13:30:22,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320385477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:22,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:22,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:22,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637018540] [2024-06-14 13:30:22,333 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:22,333 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:22,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:22,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:22,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:22,384 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:22,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 431 transitions, 5909 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 13:30:22,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:22,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:22,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:23,649 INFO L124 PetriNetUnfolderBase]: 3662/5669 cut-off events. [2024-06-14 13:30:23,649 INFO L125 PetriNetUnfolderBase]: For 619329/619365 co-relation queries the response was YES. [2024-06-14 13:30:23,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46469 conditions, 5669 events. 3662/5669 cut-off events. For 619329/619365 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31973 event pairs, 767 based on Foata normal form. 26/5688 useless extension candidates. Maximal degree in co-relation 46306. Up to 5463 conditions per place. [2024-06-14 13:30:23,726 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 379 selfloop transitions, 77 changer transitions 0/459 dead transitions. [2024-06-14 13:30:23,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 459 transitions, 7357 flow [2024-06-14 13:30:23,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:23,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:23,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-14 13:30:23,727 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:30:23,727 INFO L175 Difference]: Start difference. First operand has 346 places, 431 transitions, 5909 flow. Second operand 8 states and 128 transitions. [2024-06-14 13:30:23,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 459 transitions, 7357 flow [2024-06-14 13:30:25,769 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 350 places, 459 transitions, 7181 flow, removed 55 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:25,774 INFO L231 Difference]: Finished difference. Result has 351 places, 437 transitions, 6009 flow [2024-06-14 13:30:25,775 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5733, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=431, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=360, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6009, PETRI_PLACES=351, PETRI_TRANSITIONS=437} [2024-06-14 13:30:25,775 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 309 predicate places. [2024-06-14 13:30:25,775 INFO L495 AbstractCegarLoop]: Abstraction has has 351 places, 437 transitions, 6009 flow [2024-06-14 13:30:25,775 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 13:30:25,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:25,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:30:25,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:30:25,775 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 13:30:25,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:25,776 INFO L85 PathProgramCache]: Analyzing trace with hash 1953708515, now seen corresponding path program 9 times [2024-06-14 13:30:25,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:25,776 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78961460] [2024-06-14 13:30:25,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:25,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:25,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:26,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:26,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:26,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78961460] [2024-06-14 13:30:26,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78961460] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:26,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:26,587 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:26,587 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82830925] [2024-06-14 13:30:26,587 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:26,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:26,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:26,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:26,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:26,652 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:26,652 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 351 places, 437 transitions, 6009 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 13:30:26,652 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:26,652 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:26,652 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:27,981 INFO L124 PetriNetUnfolderBase]: 3659/5665 cut-off events. [2024-06-14 13:30:27,981 INFO L125 PetriNetUnfolderBase]: For 625040/625076 co-relation queries the response was YES. [2024-06-14 13:30:28,034 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46512 conditions, 5665 events. 3659/5665 cut-off events. For 625040/625076 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 31978 event pairs, 772 based on Foata normal form. 25/5683 useless extension candidates. Maximal degree in co-relation 46348. Up to 5539 conditions per place. [2024-06-14 13:30:28,053 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 387 selfloop transitions, 63 changer transitions 0/453 dead transitions. [2024-06-14 13:30:28,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 453 transitions, 6961 flow [2024-06-14 13:30:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:28,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:28,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:30:28,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-14 13:30:28,054 INFO L175 Difference]: Start difference. First operand has 351 places, 437 transitions, 6009 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:30:28,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 453 transitions, 6961 flow [2024-06-14 13:30:30,545 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 453 transitions, 6745 flow, removed 57 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:30,552 INFO L231 Difference]: Finished difference. Result has 355 places, 437 transitions, 5925 flow [2024-06-14 13:30:30,553 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5793, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5925, PETRI_PLACES=355, PETRI_TRANSITIONS=437} [2024-06-14 13:30:30,553 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 13:30:30,554 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 437 transitions, 5925 flow [2024-06-14 13:30:30,554 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 13:30:30,554 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:30,554 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 13:30:30,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:30:30,554 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 13:30:30,555 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:30,555 INFO L85 PathProgramCache]: Analyzing trace with hash 496308691, now seen corresponding path program 6 times [2024-06-14 13:30:30,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:30,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833619022] [2024-06-14 13:30:30,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:30,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:30,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:31,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:31,527 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:31,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833619022] [2024-06-14 13:30:31,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833619022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:31,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:31,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:31,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294779796] [2024-06-14 13:30:31,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:31,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:31,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:31,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:31,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:31,636 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:31,636 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 437 transitions, 5925 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 13:30:31,636 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:31,636 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:31,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:32,950 INFO L124 PetriNetUnfolderBase]: 3653/5659 cut-off events. [2024-06-14 13:30:32,950 INFO L125 PetriNetUnfolderBase]: For 632645/632645 co-relation queries the response was YES. [2024-06-14 13:30:33,014 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46232 conditions, 5659 events. 3653/5659 cut-off events. For 632645/632645 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 31934 event pairs, 784 based on Foata normal form. 2/5658 useless extension candidates. Maximal degree in co-relation 46067. Up to 5593 conditions per place. [2024-06-14 13:30:33,036 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 425 selfloop transitions, 26 changer transitions 0/454 dead transitions. [2024-06-14 13:30:33,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 454 transitions, 6885 flow [2024-06-14 13:30:33,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:30:33,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:30:33,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-14 13:30:33,037 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 13:30:33,037 INFO L175 Difference]: Start difference. First operand has 355 places, 437 transitions, 5925 flow. Second operand 8 states and 120 transitions. [2024-06-14 13:30:33,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 454 transitions, 6885 flow [2024-06-14 13:30:35,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 454 transitions, 6725 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:35,395 INFO L231 Difference]: Finished difference. Result has 356 places, 437 transitions, 5823 flow [2024-06-14 13:30:35,395 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5765, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5823, PETRI_PLACES=356, PETRI_TRANSITIONS=437} [2024-06-14 13:30:35,396 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-14 13:30:35,396 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 437 transitions, 5823 flow [2024-06-14 13:30:35,396 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.777777777777779) internal successors, (79), 9 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:30:35,396 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:35,396 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 13:30:35,396 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:30:35,396 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 13:30:35,396 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:35,396 INFO L85 PathProgramCache]: Analyzing trace with hash -281233803, now seen corresponding path program 7 times [2024-06-14 13:30:35,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:35,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498209165] [2024-06-14 13:30:35,397 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:35,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:35,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:36,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:36,130 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498209165] [2024-06-14 13:30:36,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498209165] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:36,130 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:36,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:36,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570058466] [2024-06-14 13:30:36,130 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:36,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:36,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:36,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:36,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:36,212 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:36,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 437 transitions, 5823 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 13:30:36,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:36,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:36,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:37,463 INFO L124 PetriNetUnfolderBase]: 3663/5669 cut-off events. [2024-06-14 13:30:37,463 INFO L125 PetriNetUnfolderBase]: For 646191/646195 co-relation queries the response was YES. [2024-06-14 13:30:37,526 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46400 conditions, 5669 events. 3663/5669 cut-off events. For 646191/646195 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 32002 event pairs, 765 based on Foata normal form. 6/5672 useless extension candidates. Maximal degree in co-relation 46234. Up to 5581 conditions per place. [2024-06-14 13:30:37,547 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 419 selfloop transitions, 39 changer transitions 0/461 dead transitions. [2024-06-14 13:30:37,547 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 461 transitions, 6887 flow [2024-06-14 13:30:37,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:30:37,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:30:37,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-14 13:30:37,548 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 13:30:37,548 INFO L175 Difference]: Start difference. First operand has 356 places, 437 transitions, 5823 flow. Second operand 6 states and 104 transitions. [2024-06-14 13:30:37,548 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 461 transitions, 6887 flow [2024-06-14 13:30:39,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 461 transitions, 6809 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:39,365 INFO L231 Difference]: Finished difference. Result has 356 places, 441 transitions, 5950 flow [2024-06-14 13:30:39,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5745, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=398, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5950, PETRI_PLACES=356, PETRI_TRANSITIONS=441} [2024-06-14 13:30:39,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 314 predicate places. [2024-06-14 13:30:39,365 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 441 transitions, 5950 flow [2024-06-14 13:30:39,366 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 13:30:39,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:39,366 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 13:30:39,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:30:39,366 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 13:30:39,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:39,366 INFO L85 PathProgramCache]: Analyzing trace with hash 112358937, now seen corresponding path program 8 times [2024-06-14 13:30:39,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:39,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463235716] [2024-06-14 13:30:39,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:39,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:39,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:40,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:40,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:40,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463235716] [2024-06-14 13:30:40,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463235716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:40,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:40,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:40,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511521751] [2024-06-14 13:30:40,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:40,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:40,244 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:40,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:40,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:40,308 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:40,308 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 441 transitions, 5950 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 13:30:40,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:40,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:40,309 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:41,649 INFO L124 PetriNetUnfolderBase]: 3683/5697 cut-off events. [2024-06-14 13:30:41,649 INFO L125 PetriNetUnfolderBase]: For 661182/661186 co-relation queries the response was YES. [2024-06-14 13:30:41,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46897 conditions, 5697 events. 3683/5697 cut-off events. For 661182/661186 co-relation queries the response was YES. Maximal size of possible extension queue 325. Compared 32173 event pairs, 765 based on Foata normal form. 6/5700 useless extension candidates. Maximal degree in co-relation 46729. Up to 5562 conditions per place. [2024-06-14 13:30:41,737 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 405 selfloop transitions, 64 changer transitions 0/472 dead transitions. [2024-06-14 13:30:41,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 472 transitions, 7075 flow [2024-06-14 13:30:41,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:41,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-14 13:30:41,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4250871080139373 [2024-06-14 13:30:41,738 INFO L175 Difference]: Start difference. First operand has 356 places, 441 transitions, 5950 flow. Second operand 7 states and 122 transitions. [2024-06-14 13:30:41,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 472 transitions, 7075 flow [2024-06-14 13:30:44,235 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 472 transitions, 6992 flow, removed 22 selfloop flow, removed 3 redundant places. [2024-06-14 13:30:44,240 INFO L231 Difference]: Finished difference. Result has 361 places, 447 transitions, 6160 flow [2024-06-14 13:30:44,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5867, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6160, PETRI_PLACES=361, PETRI_TRANSITIONS=447} [2024-06-14 13:30:44,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 319 predicate places. [2024-06-14 13:30:44,241 INFO L495 AbstractCegarLoop]: Abstraction has has 361 places, 447 transitions, 6160 flow [2024-06-14 13:30:44,241 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 13:30:44,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:44,241 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 13:30:44,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:30:44,241 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 13:30:44,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:44,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1155523013, now seen corresponding path program 10 times [2024-06-14 13:30:44,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:44,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464738326] [2024-06-14 13:30:44,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:44,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:44,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:45,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:45,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:45,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464738326] [2024-06-14 13:30:45,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464738326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:45,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:45,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:45,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145856690] [2024-06-14 13:30:45,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:45,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:45,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:45,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:45,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:45,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:45,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 361 places, 447 transitions, 6160 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 13:30:45,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:45,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:45,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:46,407 INFO L124 PetriNetUnfolderBase]: 3680/5695 cut-off events. [2024-06-14 13:30:46,407 INFO L125 PetriNetUnfolderBase]: For 668659/668695 co-relation queries the response was YES. [2024-06-14 13:30:46,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47064 conditions, 5695 events. 3680/5695 cut-off events. For 668659/668695 co-relation queries the response was YES. Maximal size of possible extension queue 324. Compared 32153 event pairs, 773 based on Foata normal form. 25/5713 useless extension candidates. Maximal degree in co-relation 46894. Up to 5543 conditions per place. [2024-06-14 13:30:46,493 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 406 selfloop transitions, 61 changer transitions 0/470 dead transitions. [2024-06-14 13:30:46,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 470 transitions, 7528 flow [2024-06-14 13:30:46,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:46,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:46,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 118 transitions. [2024-06-14 13:30:46,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41114982578397213 [2024-06-14 13:30:46,494 INFO L175 Difference]: Start difference. First operand has 361 places, 447 transitions, 6160 flow. Second operand 7 states and 118 transitions. [2024-06-14 13:30:46,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 470 transitions, 7528 flow [2024-06-14 13:30:49,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 470 transitions, 7352 flow, removed 50 selfloop flow, removed 4 redundant places. [2024-06-14 13:30:49,954 INFO L231 Difference]: Finished difference. Result has 364 places, 447 transitions, 6116 flow [2024-06-14 13:30:49,954 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5984, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6116, PETRI_PLACES=364, PETRI_TRANSITIONS=447} [2024-06-14 13:30:49,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 13:30:49,955 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 447 transitions, 6116 flow [2024-06-14 13:30:49,955 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 13:30:49,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:49,955 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 13:30:49,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:30:49,955 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 13:30:49,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash -1153510761, now seen corresponding path program 9 times [2024-06-14 13:30:49,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:49,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860887602] [2024-06-14 13:30:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:49,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:49,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:50,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:50,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:50,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860887602] [2024-06-14 13:30:50,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860887602] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:50,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:50,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:50,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678170801] [2024-06-14 13:30:50,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:50,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:50,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:50,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:50,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:50,758 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:50,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 447 transitions, 6116 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 13:30:50,759 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:50,759 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:50,759 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:52,200 INFO L124 PetriNetUnfolderBase]: 3690/5707 cut-off events. [2024-06-14 13:30:52,201 INFO L125 PetriNetUnfolderBase]: For 685254/685258 co-relation queries the response was YES. [2024-06-14 13:30:52,256 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47302 conditions, 5707 events. 3690/5707 cut-off events. For 685254/685258 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32213 event pairs, 769 based on Foata normal form. 6/5710 useless extension candidates. Maximal degree in co-relation 47131. Up to 5630 conditions per place. [2024-06-14 13:30:52,275 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 428 selfloop transitions, 37 changer transitions 0/468 dead transitions. [2024-06-14 13:30:52,275 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 468 transitions, 7187 flow [2024-06-14 13:30:52,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:52,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:52,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 110 transitions. [2024-06-14 13:30:52,276 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3832752613240418 [2024-06-14 13:30:52,276 INFO L175 Difference]: Start difference. First operand has 364 places, 447 transitions, 6116 flow. Second operand 7 states and 110 transitions. [2024-06-14 13:30:52,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 468 transitions, 7187 flow [2024-06-14 13:30:54,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 468 transitions, 7063 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:30:54,186 INFO L231 Difference]: Finished difference. Result has 364 places, 450 transitions, 6161 flow [2024-06-14 13:30:54,186 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5992, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=410, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6161, PETRI_PLACES=364, PETRI_TRANSITIONS=450} [2024-06-14 13:30:54,186 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 13:30:54,187 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 450 transitions, 6161 flow [2024-06-14 13:30:54,187 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 13:30:54,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:54,187 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 13:30:54,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:30:54,187 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 13:30:54,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:54,187 INFO L85 PathProgramCache]: Analyzing trace with hash -293089443, now seen corresponding path program 10 times [2024-06-14 13:30:54,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:54,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [674583541] [2024-06-14 13:30:54,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:54,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:54,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:54,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:54,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:54,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [674583541] [2024-06-14 13:30:54,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [674583541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:54,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:54,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:54,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407631796] [2024-06-14 13:30:54,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:54,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:54,950 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:54,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:54,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:55,016 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:55,016 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 450 transitions, 6161 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 13:30:55,016 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:55,016 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:55,016 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:30:56,347 INFO L124 PetriNetUnfolderBase]: 3684/5699 cut-off events. [2024-06-14 13:30:56,347 INFO L125 PetriNetUnfolderBase]: For 676958/676962 co-relation queries the response was YES. [2024-06-14 13:30:56,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46964 conditions, 5699 events. 3684/5699 cut-off events. For 676958/676962 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32166 event pairs, 768 based on Foata normal form. 6/5702 useless extension candidates. Maximal degree in co-relation 46795. Up to 5573 conditions per place. [2024-06-14 13:30:56,430 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 412 selfloop transitions, 57 changer transitions 0/472 dead transitions. [2024-06-14 13:30:56,430 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 472 transitions, 7177 flow [2024-06-14 13:30:56,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:30:56,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:30:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:30:56,433 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 13:30:56,433 INFO L175 Difference]: Start difference. First operand has 364 places, 450 transitions, 6161 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:30:56,433 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 472 transitions, 7177 flow [2024-06-14 13:30:59,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 365 places, 472 transitions, 7001 flow, removed 50 selfloop flow, removed 5 redundant places. [2024-06-14 13:30:59,077 INFO L231 Difference]: Finished difference. Result has 366 places, 450 transitions, 6113 flow [2024-06-14 13:30:59,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5985, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6113, PETRI_PLACES=366, PETRI_TRANSITIONS=450} [2024-06-14 13:30:59,077 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-14 13:30:59,077 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 450 transitions, 6113 flow [2024-06-14 13:30:59,077 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 13:30:59,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:30:59,077 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 13:30:59,077 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:30:59,078 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 13:30:59,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:30:59,078 INFO L85 PathProgramCache]: Analyzing trace with hash -1153748097, now seen corresponding path program 11 times [2024-06-14 13:30:59,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:30:59,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259305694] [2024-06-14 13:30:59,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:30:59,078 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:30:59,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:30:59,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:30:59,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:30:59,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259305694] [2024-06-14 13:30:59,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259305694] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:30:59,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:30:59,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:30:59,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465322870] [2024-06-14 13:30:59,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:30:59,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:30:59,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:30:59,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:30:59,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:30:59,878 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:30:59,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 450 transitions, 6113 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 13:30:59,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:30:59,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:30:59,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:01,200 INFO L124 PetriNetUnfolderBase]: 3681/5695 cut-off events. [2024-06-14 13:31:01,200 INFO L125 PetriNetUnfolderBase]: For 667022/667026 co-relation queries the response was YES. [2024-06-14 13:31:01,262 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46689 conditions, 5695 events. 3681/5695 cut-off events. For 667022/667026 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 32150 event pairs, 765 based on Foata normal form. 5/5697 useless extension candidates. Maximal degree in co-relation 46520. Up to 5607 conditions per place. [2024-06-14 13:31:01,285 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 432 selfloop transitions, 38 changer transitions 0/473 dead transitions. [2024-06-14 13:31:01,285 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 473 transitions, 7129 flow [2024-06-14 13:31:01,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:01,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:01,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:31:01,286 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 13:31:01,286 INFO L175 Difference]: Start difference. First operand has 366 places, 450 transitions, 6113 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:31:01,286 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 473 transitions, 7129 flow [2024-06-14 13:31:03,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 473 transitions, 6913 flow, removed 55 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:03,905 INFO L231 Difference]: Finished difference. Result has 367 places, 450 transitions, 5987 flow [2024-06-14 13:31:03,905 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5987, PETRI_PLACES=367, PETRI_TRANSITIONS=450} [2024-06-14 13:31:03,906 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 325 predicate places. [2024-06-14 13:31:03,906 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 450 transitions, 5987 flow [2024-06-14 13:31:03,906 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 13:31:03,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:03,906 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 13:31:03,906 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:31:03,907 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 13:31:03,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:03,907 INFO L85 PathProgramCache]: Analyzing trace with hash -1155107117, now seen corresponding path program 11 times [2024-06-14 13:31:03,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:03,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080360552] [2024-06-14 13:31:03,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:03,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:03,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:04,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:04,717 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:04,717 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080360552] [2024-06-14 13:31:04,717 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080360552] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:04,717 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:04,717 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:04,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699033572] [2024-06-14 13:31:04,717 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:04,717 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:04,717 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:04,717 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:04,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:04,803 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:31:04,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 450 transitions, 5987 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 13:31:04,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:04,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:31:04,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:06,100 INFO L124 PetriNetUnfolderBase]: 3691/5713 cut-off events. [2024-06-14 13:31:06,100 INFO L125 PetriNetUnfolderBase]: For 657689/657689 co-relation queries the response was YES. [2024-06-14 13:31:06,160 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46517 conditions, 5713 events. 3691/5713 cut-off events. For 657689/657689 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 32299 event pairs, 786 based on Foata normal form. 2/5712 useless extension candidates. Maximal degree in co-relation 46348. Up to 5635 conditions per place. [2024-06-14 13:31:06,180 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 434 selfloop transitions, 32 changer transitions 0/469 dead transitions. [2024-06-14 13:31:06,180 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 373 places, 469 transitions, 7042 flow [2024-06-14 13:31:06,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:06,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-14 13:31:06,181 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3797909407665505 [2024-06-14 13:31:06,181 INFO L175 Difference]: Start difference. First operand has 367 places, 450 transitions, 5987 flow. Second operand 7 states and 109 transitions. [2024-06-14 13:31:06,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 373 places, 469 transitions, 7042 flow [2024-06-14 13:31:08,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 469 transitions, 6974 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:08,687 INFO L231 Difference]: Finished difference. Result has 369 places, 453 transitions, 6066 flow [2024-06-14 13:31:08,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5919, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=450, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=418, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6066, PETRI_PLACES=369, PETRI_TRANSITIONS=453} [2024-06-14 13:31:08,688 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 13:31:08,688 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 453 transitions, 6066 flow [2024-06-14 13:31:08,688 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 13:31:08,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:08,688 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 13:31:08,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:31:08,688 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 13:31:08,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:08,689 INFO L85 PathProgramCache]: Analyzing trace with hash -115957923, now seen corresponding path program 12 times [2024-06-14 13:31:08,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:08,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278872789] [2024-06-14 13:31:08,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:08,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:08,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:09,482 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278872789] [2024-06-14 13:31:09,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278872789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:09,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:09,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:09,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426706480] [2024-06-14 13:31:09,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:09,483 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:09,483 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:09,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:09,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:09,549 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:31:09,549 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 453 transitions, 6066 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 13:31:09,549 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:09,549 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:31:09,549 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:10,781 INFO L124 PetriNetUnfolderBase]: 3685/5703 cut-off events. [2024-06-14 13:31:10,781 INFO L125 PetriNetUnfolderBase]: For 650744/650780 co-relation queries the response was YES. [2024-06-14 13:31:10,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46294 conditions, 5703 events. 3685/5703 cut-off events. For 650744/650780 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32218 event pairs, 765 based on Foata normal form. 26/5722 useless extension candidates. Maximal degree in co-relation 46124. Up to 5482 conditions per place. [2024-06-14 13:31:10,862 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 376 selfloop transitions, 95 changer transitions 0/474 dead transitions. [2024-06-14 13:31:10,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 474 transitions, 7086 flow [2024-06-14 13:31:10,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:10,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:10,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-14 13:31:10,863 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40418118466898956 [2024-06-14 13:31:10,863 INFO L175 Difference]: Start difference. First operand has 369 places, 453 transitions, 6066 flow. Second operand 7 states and 116 transitions. [2024-06-14 13:31:10,863 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 474 transitions, 7086 flow [2024-06-14 13:31:13,542 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 474 transitions, 6884 flow, removed 48 selfloop flow, removed 6 redundant places. [2024-06-14 13:31:13,548 INFO L231 Difference]: Finished difference. Result has 370 places, 453 transitions, 6068 flow [2024-06-14 13:31:13,548 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5864, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=6068, PETRI_PLACES=370, PETRI_TRANSITIONS=453} [2024-06-14 13:31:13,549 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 13:31:13,549 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 453 transitions, 6068 flow [2024-06-14 13:31:13,549 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 13:31:13,549 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:13,549 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 13:31:13,549 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:31:13,549 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 13:31:13,550 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:13,550 INFO L85 PathProgramCache]: Analyzing trace with hash -115720959, now seen corresponding path program 12 times [2024-06-14 13:31:13,550 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:13,550 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610404504] [2024-06-14 13:31:13,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:13,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:13,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:14,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:14,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:14,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610404504] [2024-06-14 13:31:14,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610404504] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:14,329 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:14,329 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:31:14,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041463149] [2024-06-14 13:31:14,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:14,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:31:14,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:14,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:31:14,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:31:14,397 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:31:14,397 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 453 transitions, 6068 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 13:31:14,397 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:14,397 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:31:14,397 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:15,629 INFO L124 PetriNetUnfolderBase]: 3682/5699 cut-off events. [2024-06-14 13:31:15,629 INFO L125 PetriNetUnfolderBase]: For 641863/641899 co-relation queries the response was YES. [2024-06-14 13:31:15,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46114 conditions, 5699 events. 3682/5699 cut-off events. For 641863/641899 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 32214 event pairs, 765 based on Foata normal form. 25/5717 useless extension candidates. Maximal degree in co-relation 45945. Up to 5549 conditions per place. [2024-06-14 13:31:15,709 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 407 selfloop transitions, 64 changer transitions 0/474 dead transitions. [2024-06-14 13:31:15,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 474 transitions, 7080 flow [2024-06-14 13:31:15,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:15,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-14 13:31:15,710 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40069686411149824 [2024-06-14 13:31:15,710 INFO L175 Difference]: Start difference. First operand has 370 places, 453 transitions, 6068 flow. Second operand 7 states and 115 transitions. [2024-06-14 13:31:15,710 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 474 transitions, 7080 flow [2024-06-14 13:31:18,356 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 474 transitions, 6802 flow, removed 46 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:18,363 INFO L231 Difference]: Finished difference. Result has 370 places, 453 transitions, 5928 flow [2024-06-14 13:31:18,364 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5790, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=389, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5928, PETRI_PLACES=370, PETRI_TRANSITIONS=453} [2024-06-14 13:31:18,364 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 13:31:18,364 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 453 transitions, 5928 flow [2024-06-14 13:31:18,365 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 13:31:18,365 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:18,365 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 13:31:18,365 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:31:18,365 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 13:31:18,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:18,365 INFO L85 PathProgramCache]: Analyzing trace with hash -2132943859, now seen corresponding path program 2 times [2024-06-14 13:31:18,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:18,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186687146] [2024-06-14 13:31:18,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:18,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:19,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:19,536 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:19,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186687146] [2024-06-14 13:31:19,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186687146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:19,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:19,537 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:31:19,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586121844] [2024-06-14 13:31:19,537 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:19,537 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:31:19,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:19,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:31:19,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:31:19,614 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:31:19,614 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 453 transitions, 5928 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:31:19,614 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:19,614 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:31:19,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:20,937 INFO L124 PetriNetUnfolderBase]: 3690/5709 cut-off events. [2024-06-14 13:31:20,937 INFO L125 PetriNetUnfolderBase]: For 630917/630921 co-relation queries the response was YES. [2024-06-14 13:31:20,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45873 conditions, 5709 events. 3690/5709 cut-off events. For 630917/630921 co-relation queries the response was YES. Maximal size of possible extension queue 331. Compared 32258 event pairs, 766 based on Foata normal form. 6/5712 useless extension candidates. Maximal degree in co-relation 45705. Up to 5638 conditions per place. [2024-06-14 13:31:21,016 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 438 selfloop transitions, 31 changer transitions 0/472 dead transitions. [2024-06-14 13:31:21,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 472 transitions, 6972 flow [2024-06-14 13:31:21,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:31:21,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:31:21,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 100 transitions. [2024-06-14 13:31:21,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:31:21,017 INFO L175 Difference]: Start difference. First operand has 370 places, 453 transitions, 5928 flow. Second operand 6 states and 100 transitions. [2024-06-14 13:31:21,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 472 transitions, 6972 flow [2024-06-14 13:31:23,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 472 transitions, 6808 flow, removed 1 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:23,685 INFO L231 Difference]: Finished difference. Result has 369 places, 455 transitions, 5885 flow [2024-06-14 13:31:23,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5764, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=5885, PETRI_PLACES=369, PETRI_TRANSITIONS=455} [2024-06-14 13:31:23,686 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 13:31:23,686 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 455 transitions, 5885 flow [2024-06-14 13:31:23,686 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:31:23,686 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:23,686 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 13:31:23,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:31:23,686 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 13:31:23,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:23,687 INFO L85 PathProgramCache]: Analyzing trace with hash -292843365, now seen corresponding path program 3 times [2024-06-14 13:31:23,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:23,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359655228] [2024-06-14 13:31:23,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:23,687 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:23,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:24,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:24,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:24,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359655228] [2024-06-14 13:31:24,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359655228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:24,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:24,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:31:24,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940144703] [2024-06-14 13:31:24,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:24,814 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:31:24,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:24,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:31:24,814 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:31:24,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:31:24,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 455 transitions, 5885 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:31:24,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:24,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:31:24,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:26,320 INFO L124 PetriNetUnfolderBase]: 3698/5721 cut-off events. [2024-06-14 13:31:26,320 INFO L125 PetriNetUnfolderBase]: For 632391/632395 co-relation queries the response was YES. [2024-06-14 13:31:26,384 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46000 conditions, 5721 events. 3698/5721 cut-off events. For 632391/632395 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32335 event pairs, 764 based on Foata normal form. 6/5724 useless extension candidates. Maximal degree in co-relation 45832. Up to 5630 conditions per place. [2024-06-14 13:31:26,404 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 429 selfloop transitions, 43 changer transitions 0/475 dead transitions. [2024-06-14 13:31:26,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 375 places, 475 transitions, 6941 flow [2024-06-14 13:31:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:31:26,405 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:31:26,405 INFO L175 Difference]: Start difference. First operand has 369 places, 455 transitions, 5885 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:31:26,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 375 places, 475 transitions, 6941 flow [2024-06-14 13:31:28,974 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 475 transitions, 6836 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:28,979 INFO L231 Difference]: Finished difference. Result has 372 places, 457 transitions, 5932 flow [2024-06-14 13:31:28,979 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5780, PETRI_DIFFERENCE_MINUEND_PLACES=365, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=455, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=412, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5932, PETRI_PLACES=372, PETRI_TRANSITIONS=457} [2024-06-14 13:31:28,979 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 13:31:28,979 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 457 transitions, 5932 flow [2024-06-14 13:31:28,979 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:31:28,980 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:28,980 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 13:31:28,980 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:31:28,980 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 13:31:28,980 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:28,980 INFO L85 PathProgramCache]: Analyzing trace with hash 120938745, now seen corresponding path program 4 times [2024-06-14 13:31:28,980 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:28,980 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328749502] [2024-06-14 13:31:28,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:28,981 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:28,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:30,079 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 13:31:30,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:30,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328749502] [2024-06-14 13:31:30,080 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328749502] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:30,080 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:30,080 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-14 13:31:30,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223079851] [2024-06-14 13:31:30,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:30,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-14 13:31:30,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:30,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-14 13:31:30,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-14 13:31:30,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:31:30,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 457 transitions, 5932 flow. Second operand has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:31:30,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:30,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:31:30,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:31,650 INFO L124 PetriNetUnfolderBase]: 3693/5714 cut-off events. [2024-06-14 13:31:31,650 INFO L125 PetriNetUnfolderBase]: For 637929/637933 co-relation queries the response was YES. [2024-06-14 13:31:31,704 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45970 conditions, 5714 events. 3693/5714 cut-off events. For 637929/637933 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 32282 event pairs, 763 based on Foata normal form. 6/5717 useless extension candidates. Maximal degree in co-relation 45801. Up to 5629 conditions per place. [2024-06-14 13:31:31,722 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 440 selfloop transitions, 35 changer transitions 0/478 dead transitions. [2024-06-14 13:31:31,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 478 transitions, 7000 flow [2024-06-14 13:31:31,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:31:31,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:31:31,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-14 13:31:31,724 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:31:31,724 INFO L175 Difference]: Start difference. First operand has 372 places, 457 transitions, 5932 flow. Second operand 7 states and 112 transitions. [2024-06-14 13:31:31,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 478 transitions, 7000 flow [2024-06-14 13:31:34,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 478 transitions, 6864 flow, removed 28 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:34,383 INFO L231 Difference]: Finished difference. Result has 374 places, 459 transitions, 5933 flow [2024-06-14 13:31:34,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5800, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=457, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5933, PETRI_PLACES=374, PETRI_TRANSITIONS=459} [2024-06-14 13:31:34,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-14 13:31:34,383 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 459 transitions, 5933 flow [2024-06-14 13:31:34,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 8.545454545454545) internal successors, (94), 11 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 13:31:34,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:34,383 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 13:31:34,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:31:34,384 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 13:31:34,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:34,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1835569313, now seen corresponding path program 1 times [2024-06-14 13:31:34,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:34,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741215458] [2024-06-14 13:31:34,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:34,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:34,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:35,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:35,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741215458] [2024-06-14 13:31:35,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741215458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:35,481 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:35,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:35,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836755871] [2024-06-14 13:31:35,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:35,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:35,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:35,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:35,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:35,612 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:31:35,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 459 transitions, 5933 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:35,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:35,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:31:35,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:36,924 INFO L124 PetriNetUnfolderBase]: 3677/5753 cut-off events. [2024-06-14 13:31:36,924 INFO L125 PetriNetUnfolderBase]: For 721775/721792 co-relation queries the response was YES. [2024-06-14 13:31:36,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47315 conditions, 5753 events. 3677/5753 cut-off events. For 721775/721792 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 33173 event pairs, 749 based on Foata normal form. 11/5757 useless extension candidates. Maximal degree in co-relation 47145. Up to 5265 conditions per place. [2024-06-14 13:31:37,016 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 389 selfloop transitions, 59 changer transitions 0/502 dead transitions. [2024-06-14 13:31:37,016 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 502 transitions, 7268 flow [2024-06-14 13:31:37,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:37,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:37,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 156 transitions. [2024-06-14 13:31:37,017 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42276422764227645 [2024-06-14 13:31:37,017 INFO L175 Difference]: Start difference. First operand has 374 places, 459 transitions, 5933 flow. Second operand 9 states and 156 transitions. [2024-06-14 13:31:37,017 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 502 transitions, 7268 flow [2024-06-14 13:31:39,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 502 transitions, 7151 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 13:31:39,383 INFO L231 Difference]: Finished difference. Result has 379 places, 464 transitions, 6026 flow [2024-06-14 13:31:39,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5816, PETRI_DIFFERENCE_MINUEND_PLACES=369, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=459, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=401, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6026, PETRI_PLACES=379, PETRI_TRANSITIONS=464} [2024-06-14 13:31:39,383 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 337 predicate places. [2024-06-14 13:31:39,383 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 464 transitions, 6026 flow [2024-06-14 13:31:39,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:39,383 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:39,383 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 13:31:39,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:31:39,383 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 13:31:39,384 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:39,384 INFO L85 PathProgramCache]: Analyzing trace with hash 1835629763, now seen corresponding path program 2 times [2024-06-14 13:31:39,384 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:39,384 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535821860] [2024-06-14 13:31:39,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:39,384 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:39,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:40,405 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:40,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:40,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535821860] [2024-06-14 13:31:40,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535821860] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:40,406 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:40,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:40,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929406323] [2024-06-14 13:31:40,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:40,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:40,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:40,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:40,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:40,485 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:31:40,485 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 464 transitions, 6026 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:40,485 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:40,485 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:31:40,485 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:41,882 INFO L124 PetriNetUnfolderBase]: 3713/5809 cut-off events. [2024-06-14 13:31:41,882 INFO L125 PetriNetUnfolderBase]: For 747549/747598 co-relation queries the response was YES. [2024-06-14 13:31:41,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47992 conditions, 5809 events. 3713/5809 cut-off events. For 747549/747598 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 33618 event pairs, 790 based on Foata normal form. 12/5813 useless extension candidates. Maximal degree in co-relation 47820. Up to 5431 conditions per place. [2024-06-14 13:31:41,968 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 68 changer transitions 0/496 dead transitions. [2024-06-14 13:31:41,968 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 387 places, 496 transitions, 7240 flow [2024-06-14 13:31:41,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:41,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:41,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:31:41,969 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:31:41,969 INFO L175 Difference]: Start difference. First operand has 379 places, 464 transitions, 6026 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:31:41,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 387 places, 496 transitions, 7240 flow [2024-06-14 13:31:44,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 496 transitions, 7181 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:31:44,840 INFO L231 Difference]: Finished difference. Result has 384 places, 465 transitions, 6130 flow [2024-06-14 13:31:44,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5967, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=396, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6130, PETRI_PLACES=384, PETRI_TRANSITIONS=465} [2024-06-14 13:31:44,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 13:31:44,841 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 465 transitions, 6130 flow [2024-06-14 13:31:44,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:44,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:44,841 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 13:31:44,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:31:44,841 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 13:31:44,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:44,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1838426273, now seen corresponding path program 3 times [2024-06-14 13:31:44,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:44,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60771302] [2024-06-14 13:31:44,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:44,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:44,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:45,935 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 13:31:45,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:45,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60771302] [2024-06-14 13:31:45,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60771302] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:45,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:45,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:45,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419261601] [2024-06-14 13:31:45,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:45,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:45,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:45,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:45,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:46,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:31:46,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 465 transitions, 6130 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:46,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:46,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:31:46,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:47,356 INFO L124 PetriNetUnfolderBase]: 3757/5877 cut-off events. [2024-06-14 13:31:47,356 INFO L125 PetriNetUnfolderBase]: For 776879/776945 co-relation queries the response was YES. [2024-06-14 13:31:47,425 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48862 conditions, 5877 events. 3757/5877 cut-off events. For 776879/776945 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 34104 event pairs, 798 based on Foata normal form. 13/5880 useless extension candidates. Maximal degree in co-relation 48688. Up to 5539 conditions per place. [2024-06-14 13:31:47,448 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 394 selfloop transitions, 46 changer transitions 0/494 dead transitions. [2024-06-14 13:31:47,448 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 392 places, 494 transitions, 7190 flow [2024-06-14 13:31:47,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:47,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:47,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:31:47,449 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:31:47,449 INFO L175 Difference]: Start difference. First operand has 384 places, 465 transitions, 6130 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:31:47,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 392 places, 494 transitions, 7190 flow [2024-06-14 13:31:49,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 385 places, 494 transitions, 7051 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:49,452 INFO L231 Difference]: Finished difference. Result has 386 places, 466 transitions, 6113 flow [2024-06-14 13:31:49,452 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5991, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=465, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6113, PETRI_PLACES=386, PETRI_TRANSITIONS=466} [2024-06-14 13:31:49,452 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-14 13:31:49,452 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 466 transitions, 6113 flow [2024-06-14 13:31:49,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:49,453 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:49,453 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 13:31:49,453 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:31:49,453 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 13:31:49,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:49,453 INFO L85 PathProgramCache]: Analyzing trace with hash 1953717443, now seen corresponding path program 4 times [2024-06-14 13:31:49,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:49,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092327479] [2024-06-14 13:31:49,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:49,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:49,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:50,907 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:31:50,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:50,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092327479] [2024-06-14 13:31:50,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092327479] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:50,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:50,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:50,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363790872] [2024-06-14 13:31:50,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:50,907 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:50,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:50,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:50,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:50,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:31:50,998 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 466 transitions, 6113 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:50,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:50,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:31:50,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:52,471 INFO L124 PetriNetUnfolderBase]: 3799/5943 cut-off events. [2024-06-14 13:31:52,472 INFO L125 PetriNetUnfolderBase]: For 773782/773784 co-relation queries the response was YES. [2024-06-14 13:31:52,537 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49264 conditions, 5943 events. 3799/5943 cut-off events. For 773782/773784 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 34542 event pairs, 805 based on Foata normal form. 13/5948 useless extension candidates. Maximal degree in co-relation 49089. Up to 5638 conditions per place. [2024-06-14 13:31:52,558 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 403 selfloop transitions, 34 changer transitions 0/491 dead transitions. [2024-06-14 13:31:52,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 491 transitions, 7117 flow [2024-06-14 13:31:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:31:52,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:31:52,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:31:52,559 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 13:31:52,559 INFO L175 Difference]: Start difference. First operand has 386 places, 466 transitions, 6113 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:31:52,559 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 491 transitions, 7117 flow [2024-06-14 13:31:54,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 387 places, 491 transitions, 7023 flow, removed 3 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:54,668 INFO L231 Difference]: Finished difference. Result has 388 places, 467 transitions, 6118 flow [2024-06-14 13:31:54,668 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6019, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=466, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6118, PETRI_PLACES=388, PETRI_TRANSITIONS=467} [2024-06-14 13:31:54,669 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 346 predicate places. [2024-06-14 13:31:54,669 INFO L495 AbstractCegarLoop]: Abstraction has has 388 places, 467 transitions, 6118 flow [2024-06-14 13:31:54,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:31:54,669 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:54,669 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 13:31:54,669 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:31:54,669 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 13:31:54,669 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:54,669 INFO L85 PathProgramCache]: Analyzing trace with hash 1953902141, now seen corresponding path program 1 times [2024-06-14 13:31:54,670 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:54,670 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432738685] [2024-06-14 13:31:54,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:54,670 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:54,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:31:55,788 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 13:31:55,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:31:55,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432738685] [2024-06-14 13:31:55,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432738685] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:31:55,789 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:31:55,789 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:31:55,789 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288934851] [2024-06-14 13:31:55,789 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:31:55,789 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:31:55,789 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:31:55,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:31:55,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:31:55,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:31:55,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 388 places, 467 transitions, 6118 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 13:31:55,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:31:55,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:31:55,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:31:57,312 INFO L124 PetriNetUnfolderBase]: 3941/6098 cut-off events. [2024-06-14 13:31:57,312 INFO L125 PetriNetUnfolderBase]: For 739177/739177 co-relation queries the response was YES. [2024-06-14 13:31:57,378 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50395 conditions, 6098 events. 3941/6098 cut-off events. For 739177/739177 co-relation queries the response was YES. Maximal size of possible extension queue 350. Compared 34855 event pairs, 842 based on Foata normal form. 2/6097 useless extension candidates. Maximal degree in co-relation 50219. Up to 6030 conditions per place. [2024-06-14 13:31:57,400 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 455 selfloop transitions, 28 changer transitions 0/486 dead transitions. [2024-06-14 13:31:57,400 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 395 places, 486 transitions, 7184 flow [2024-06-14 13:31:57,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:31:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:31:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-14 13:31:57,401 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3628048780487805 [2024-06-14 13:31:57,401 INFO L175 Difference]: Start difference. First operand has 388 places, 467 transitions, 6118 flow. Second operand 8 states and 119 transitions. [2024-06-14 13:31:57,401 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 395 places, 486 transitions, 7184 flow [2024-06-14 13:31:59,344 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 486 transitions, 7109 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:31:59,349 INFO L231 Difference]: Finished difference. Result has 389 places, 469 transitions, 6154 flow [2024-06-14 13:31:59,349 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6043, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=439, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6154, PETRI_PLACES=389, PETRI_TRANSITIONS=469} [2024-06-14 13:31:59,350 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 13:31:59,350 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 469 transitions, 6154 flow [2024-06-14 13:31:59,350 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 13:31:59,350 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:31:59,350 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 13:31:59,350 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:31:59,350 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 13:31:59,350 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:31:59,350 INFO L85 PathProgramCache]: Analyzing trace with hash -1148605487, now seen corresponding path program 2 times [2024-06-14 13:31:59,350 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:31:59,351 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357419008] [2024-06-14 13:31:59,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:31:59,351 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:31:59,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:00,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:00,407 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:00,407 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357419008] [2024-06-14 13:32:00,407 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357419008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:00,407 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:00,407 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:00,407 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765025260] [2024-06-14 13:32:00,407 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:00,408 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:00,408 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:00,408 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:00,486 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:00,486 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 469 transitions, 6154 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 13:32:00,486 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:00,486 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:00,486 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:01,977 INFO L124 PetriNetUnfolderBase]: 3949/6110 cut-off events. [2024-06-14 13:32:01,977 INFO L125 PetriNetUnfolderBase]: For 753995/753995 co-relation queries the response was YES. [2024-06-14 13:32:02,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50622 conditions, 6110 events. 3949/6110 cut-off events. For 753995/753995 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34953 event pairs, 845 based on Foata normal form. 2/6109 useless extension candidates. Maximal degree in co-relation 50445. Up to 6026 conditions per place. [2024-06-14 13:32:02,056 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 449 selfloop transitions, 33 changer transitions 0/485 dead transitions. [2024-06-14 13:32:02,056 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 485 transitions, 7212 flow [2024-06-14 13:32:02,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:32:02,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:32:02,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 97 transitions. [2024-06-14 13:32:02,057 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3943089430894309 [2024-06-14 13:32:02,057 INFO L175 Difference]: Start difference. First operand has 389 places, 469 transitions, 6154 flow. Second operand 6 states and 97 transitions. [2024-06-14 13:32:02,057 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 485 transitions, 7212 flow [2024-06-14 13:32:03,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 485 transitions, 7117 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:03,946 INFO L231 Difference]: Finished difference. Result has 389 places, 471 transitions, 6189 flow [2024-06-14 13:32:03,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6059, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=469, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=436, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6189, PETRI_PLACES=389, PETRI_TRANSITIONS=471} [2024-06-14 13:32:03,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 347 predicate places. [2024-06-14 13:32:03,946 INFO L495 AbstractCegarLoop]: Abstraction has has 389 places, 471 transitions, 6189 flow [2024-06-14 13:32:03,946 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 13:32:03,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:03,947 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 13:32:03,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:32:03,947 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 13:32:03,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:03,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1148605735, now seen corresponding path program 1 times [2024-06-14 13:32:03,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:03,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349230484] [2024-06-14 13:32:03,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:03,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:03,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:04,942 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:04,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:04,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349230484] [2024-06-14 13:32:04,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349230484] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:04,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:04,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:04,943 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788678590] [2024-06-14 13:32:04,943 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:04,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:04,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:04,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:05,034 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:05,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 389 places, 471 transitions, 6189 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 13:32:05,034 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:05,034 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:05,034 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:06,428 INFO L124 PetriNetUnfolderBase]: 3944/6103 cut-off events. [2024-06-14 13:32:06,429 INFO L125 PetriNetUnfolderBase]: For 760912/760912 co-relation queries the response was YES. [2024-06-14 13:32:06,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50671 conditions, 6103 events. 3944/6103 cut-off events. For 760912/760912 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34948 event pairs, 856 based on Foata normal form. 1/6101 useless extension candidates. Maximal degree in co-relation 50493. Up to 6015 conditions per place. [2024-06-14 13:32:06,519 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 449 selfloop transitions, 36 changer transitions 0/488 dead transitions. [2024-06-14 13:32:06,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 488 transitions, 7217 flow [2024-06-14 13:32:06,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:32:06,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:32:06,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-14 13:32:06,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4186991869918699 [2024-06-14 13:32:06,520 INFO L175 Difference]: Start difference. First operand has 389 places, 471 transitions, 6189 flow. Second operand 6 states and 103 transitions. [2024-06-14 13:32:06,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 488 transitions, 7217 flow [2024-06-14 13:32:08,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 488 transitions, 7071 flow, removed 44 selfloop flow, removed 4 redundant places. [2024-06-14 13:32:08,578 INFO L231 Difference]: Finished difference. Result has 391 places, 471 transitions, 6133 flow [2024-06-14 13:32:08,578 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6043, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6133, PETRI_PLACES=391, PETRI_TRANSITIONS=471} [2024-06-14 13:32:08,578 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 13:32:08,579 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 471 transitions, 6133 flow [2024-06-14 13:32:08,579 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 13:32:08,579 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:08,579 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 13:32:08,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:32:08,579 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 13:32:08,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:08,580 INFO L85 PathProgramCache]: Analyzing trace with hash 120944697, now seen corresponding path program 3 times [2024-06-14 13:32:08,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:08,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745037990] [2024-06-14 13:32:08,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:08,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:08,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:09,533 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 13:32:09,533 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:09,533 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745037990] [2024-06-14 13:32:09,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745037990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:09,534 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:09,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:09,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627057127] [2024-06-14 13:32:09,534 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:09,534 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:09,534 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:09,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:09,534 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:09,604 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:09,604 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 471 transitions, 6133 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 13:32:09,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:09,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:09,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:10,915 INFO L124 PetriNetUnfolderBase]: 3939/6096 cut-off events. [2024-06-14 13:32:10,915 INFO L125 PetriNetUnfolderBase]: For 754937/754937 co-relation queries the response was YES. [2024-06-14 13:32:10,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50241 conditions, 6096 events. 3939/6096 cut-off events. For 754937/754937 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34821 event pairs, 857 based on Foata normal form. 2/6095 useless extension candidates. Maximal degree in co-relation 50062. Up to 6050 conditions per place. [2024-06-14 13:32:11,014 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 466 selfloop transitions, 15 changer transitions 0/484 dead transitions. [2024-06-14 13:32:11,014 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 484 transitions, 7175 flow [2024-06-14 13:32:11,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:32:11,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:32:11,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 91 transitions. [2024-06-14 13:32:11,015 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3699186991869919 [2024-06-14 13:32:11,015 INFO L175 Difference]: Start difference. First operand has 391 places, 471 transitions, 6133 flow. Second operand 6 states and 91 transitions. [2024-06-14 13:32:11,015 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 484 transitions, 7175 flow [2024-06-14 13:32:13,196 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 484 transitions, 7089 flow, removed 1 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:13,201 INFO L231 Difference]: Finished difference. Result has 391 places, 473 transitions, 6136 flow [2024-06-14 13:32:13,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6047, PETRI_DIFFERENCE_MINUEND_PLACES=385, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=471, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6136, PETRI_PLACES=391, PETRI_TRANSITIONS=473} [2024-06-14 13:32:13,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 13:32:13,201 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 473 transitions, 6136 flow [2024-06-14 13:32:13,202 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 13:32:13,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:13,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:13,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:32:13,202 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 13:32:13,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:13,202 INFO L85 PathProgramCache]: Analyzing trace with hash -115712031, now seen corresponding path program 5 times [2024-06-14 13:32:13,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:13,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1377262372] [2024-06-14 13:32:13,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:13,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:13,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:14,378 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 13:32:14,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:14,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1377262372] [2024-06-14 13:32:14,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1377262372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:14,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:14,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:14,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886899822] [2024-06-14 13:32:14,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:14,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:14,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:14,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:14,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:14,473 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 41 [2024-06-14 13:32:14,473 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 473 transitions, 6136 flow. Second operand has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:14,473 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:14,473 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 41 [2024-06-14 13:32:14,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:15,975 INFO L124 PetriNetUnfolderBase]: 3825/5989 cut-off events. [2024-06-14 13:32:15,975 INFO L125 PetriNetUnfolderBase]: For 805338/805340 co-relation queries the response was YES. [2024-06-14 13:32:16,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48835 conditions, 5989 events. 3825/5989 cut-off events. For 805338/805340 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 34877 event pairs, 781 based on Foata normal form. 21/6002 useless extension candidates. Maximal degree in co-relation 48656. Up to 5607 conditions per place. [2024-06-14 13:32:16,070 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 403 selfloop transitions, 49 changer transitions 0/506 dead transitions. [2024-06-14 13:32:16,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 506 transitions, 7218 flow [2024-06-14 13:32:16,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:32:16,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:32:16,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-14 13:32:16,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4298780487804878 [2024-06-14 13:32:16,071 INFO L175 Difference]: Start difference. First operand has 391 places, 473 transitions, 6136 flow. Second operand 8 states and 141 transitions. [2024-06-14 13:32:16,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 506 transitions, 7218 flow [2024-06-14 13:32:18,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 394 places, 506 transitions, 7145 flow, removed 23 selfloop flow, removed 4 redundant places. [2024-06-14 13:32:18,708 INFO L231 Difference]: Finished difference. Result has 395 places, 475 transitions, 6226 flow [2024-06-14 13:32:18,708 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6063, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6226, PETRI_PLACES=395, PETRI_TRANSITIONS=475} [2024-06-14 13:32:18,708 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 13:32:18,708 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 475 transitions, 6226 flow [2024-06-14 13:32:18,708 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 9.7) internal successors, (97), 10 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:18,708 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:18,709 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:32:18,709 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:32:18,709 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 13:32:18,709 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:18,709 INFO L85 PathProgramCache]: Analyzing trace with hash 836268107, now seen corresponding path program 1 times [2024-06-14 13:32:18,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:18,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2025227851] [2024-06-14 13:32:18,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:18,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:18,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:19,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:19,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:19,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2025227851] [2024-06-14 13:32:19,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2025227851] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:19,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:19,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:19,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642400472] [2024-06-14 13:32:19,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:19,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:19,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:19,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:19,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:19,598 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:19,598 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 475 transitions, 6226 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 13:32:19,598 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:19,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:19,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:21,044 INFO L124 PetriNetUnfolderBase]: 3985/6165 cut-off events. [2024-06-14 13:32:21,044 INFO L125 PetriNetUnfolderBase]: For 745634/745640 co-relation queries the response was YES. [2024-06-14 13:32:21,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50663 conditions, 6165 events. 3985/6165 cut-off events. For 745634/745640 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 35358 event pairs, 825 based on Foata normal form. 8/6170 useless extension candidates. Maximal degree in co-relation 50483. Up to 5913 conditions per place. [2024-06-14 13:32:21,141 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 437 selfloop transitions, 75 changer transitions 0/515 dead transitions. [2024-06-14 13:32:21,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 403 places, 515 transitions, 7726 flow [2024-06-14 13:32:21,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:21,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:21,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:32:21,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 13:32:21,142 INFO L175 Difference]: Start difference. First operand has 395 places, 475 transitions, 6226 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:32:21,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 403 places, 515 transitions, 7726 flow [2024-06-14 13:32:23,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 397 places, 515 transitions, 7611 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:23,390 INFO L231 Difference]: Finished difference. Result has 398 places, 481 transitions, 6447 flow [2024-06-14 13:32:23,391 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6113, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=475, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6447, PETRI_PLACES=398, PETRI_TRANSITIONS=481} [2024-06-14 13:32:23,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 356 predicate places. [2024-06-14 13:32:23,391 INFO L495 AbstractCegarLoop]: Abstraction has has 398 places, 481 transitions, 6447 flow [2024-06-14 13:32:23,391 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 13:32:23,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:23,391 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 13:32:23,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:32:23,391 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 13:32:23,391 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:23,392 INFO L85 PathProgramCache]: Analyzing trace with hash 337226967, now seen corresponding path program 2 times [2024-06-14 13:32:23,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:23,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021925790] [2024-06-14 13:32:23,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:23,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:23,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:24,223 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 13:32:24,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:24,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021925790] [2024-06-14 13:32:24,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021925790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:24,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:24,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:24,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615649247] [2024-06-14 13:32:24,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:24,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:24,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:24,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:24,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:24,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 398 places, 481 transitions, 6447 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 13:32:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:25,982 INFO L124 PetriNetUnfolderBase]: 4005/6193 cut-off events. [2024-06-14 13:32:25,983 INFO L125 PetriNetUnfolderBase]: For 748933/748939 co-relation queries the response was YES. [2024-06-14 13:32:26,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51157 conditions, 6193 events. 4005/6193 cut-off events. For 748933/748939 co-relation queries the response was YES. Maximal size of possible extension queue 360. Compared 35501 event pairs, 825 based on Foata normal form. 8/6198 useless extension candidates. Maximal degree in co-relation 50976. Up to 5971 conditions per place. [2024-06-14 13:32:26,075 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 441 selfloop transitions, 73 changer transitions 0/517 dead transitions. [2024-06-14 13:32:26,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 406 places, 517 transitions, 7698 flow [2024-06-14 13:32:26,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:26,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:26,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:32:26,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:32:26,076 INFO L175 Difference]: Start difference. First operand has 398 places, 481 transitions, 6447 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:32:26,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 406 places, 517 transitions, 7698 flow [2024-06-14 13:32:28,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 401 places, 517 transitions, 7488 flow, removed 61 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:28,893 INFO L231 Difference]: Finished difference. Result has 402 places, 487 transitions, 6520 flow [2024-06-14 13:32:28,893 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6260, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=481, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6520, PETRI_PLACES=402, PETRI_TRANSITIONS=487} [2024-06-14 13:32:28,893 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-14 13:32:28,893 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 487 transitions, 6520 flow [2024-06-14 13:32:28,893 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 13:32:28,894 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:28,894 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 13:32:28,894 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:32:28,894 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 13:32:28,894 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:28,894 INFO L85 PathProgramCache]: Analyzing trace with hash -429070937, now seen corresponding path program 1 times [2024-06-14 13:32:28,894 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:28,894 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [501018688] [2024-06-14 13:32:28,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:28,894 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:28,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:29,700 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 13:32:29,701 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:29,701 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [501018688] [2024-06-14 13:32:29,701 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [501018688] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:29,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:29,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:29,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989513015] [2024-06-14 13:32:29,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:29,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:29,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:29,701 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:29,701 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:29,769 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:29,770 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 487 transitions, 6520 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 13:32:29,770 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:29,770 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:29,770 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:31,355 INFO L124 PetriNetUnfolderBase]: 4072/6286 cut-off events. [2024-06-14 13:32:31,355 INFO L125 PetriNetUnfolderBase]: For 793199/793205 co-relation queries the response was YES. [2024-06-14 13:32:31,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52329 conditions, 6286 events. 4072/6286 cut-off events. For 793199/793205 co-relation queries the response was YES. Maximal size of possible extension queue 369. Compared 36053 event pairs, 821 based on Foata normal form. 10/6293 useless extension candidates. Maximal degree in co-relation 52146. Up to 5869 conditions per place. [2024-06-14 13:32:31,456 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 428 selfloop transitions, 108 changer transitions 0/539 dead transitions. [2024-06-14 13:32:31,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 539 transitions, 8120 flow [2024-06-14 13:32:31,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:31,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:31,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:32:31,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:32:31,457 INFO L175 Difference]: Start difference. First operand has 402 places, 487 transitions, 6520 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:32:31,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 539 transitions, 8120 flow [2024-06-14 13:32:34,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 404 places, 539 transitions, 7916 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:34,253 INFO L231 Difference]: Finished difference. Result has 406 places, 504 transitions, 6791 flow [2024-06-14 13:32:34,254 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6316, PETRI_DIFFERENCE_MINUEND_PLACES=396, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=487, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=391, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6791, PETRI_PLACES=406, PETRI_TRANSITIONS=504} [2024-06-14 13:32:34,254 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 364 predicate places. [2024-06-14 13:32:34,254 INFO L495 AbstractCegarLoop]: Abstraction has has 406 places, 504 transitions, 6791 flow [2024-06-14 13:32:34,254 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 13:32:34,254 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:34,254 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 13:32:34,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:32:34,255 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 13:32:34,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:34,255 INFO L85 PathProgramCache]: Analyzing trace with hash 514595823, now seen corresponding path program 2 times [2024-06-14 13:32:34,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:34,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134359310] [2024-06-14 13:32:34,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:34,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:34,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:35,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:35,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:35,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134359310] [2024-06-14 13:32:35,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134359310] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:35,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:35,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:35,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781451664] [2024-06-14 13:32:35,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:35,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:35,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:35,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:35,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:35,085 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:35,085 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 406 places, 504 transitions, 6791 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 13:32:35,085 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:35,085 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:35,085 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:36,700 INFO L124 PetriNetUnfolderBase]: 4092/6314 cut-off events. [2024-06-14 13:32:36,700 INFO L125 PetriNetUnfolderBase]: For 813000/813006 co-relation queries the response was YES. [2024-06-14 13:32:36,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53740 conditions, 6314 events. 4092/6314 cut-off events. For 813000/813006 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 36278 event pairs, 842 based on Foata normal form. 10/6321 useless extension candidates. Maximal degree in co-relation 53555. Up to 5993 conditions per place. [2024-06-14 13:32:36,803 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 431 selfloop transitions, 104 changer transitions 0/538 dead transitions. [2024-06-14 13:32:36,803 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 414 places, 538 transitions, 8063 flow [2024-06-14 13:32:36,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:36,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:36,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:32:36,804 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:32:36,804 INFO L175 Difference]: Start difference. First operand has 406 places, 504 transitions, 6791 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:32:36,804 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 414 places, 538 transitions, 8063 flow [2024-06-14 13:32:39,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 411 places, 538 transitions, 7941 flow, removed 53 selfloop flow, removed 3 redundant places. [2024-06-14 13:32:39,049 INFO L231 Difference]: Finished difference. Result has 412 places, 510 transitions, 6991 flow [2024-06-14 13:32:39,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6693, PETRI_DIFFERENCE_MINUEND_PLACES=403, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=504, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6991, PETRI_PLACES=412, PETRI_TRANSITIONS=510} [2024-06-14 13:32:39,049 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 370 predicate places. [2024-06-14 13:32:39,049 INFO L495 AbstractCegarLoop]: Abstraction has has 412 places, 510 transitions, 6991 flow [2024-06-14 13:32:39,049 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 13:32:39,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:39,050 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 13:32:39,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:32:39,050 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 13:32:39,050 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:39,050 INFO L85 PathProgramCache]: Analyzing trace with hash 514358487, now seen corresponding path program 3 times [2024-06-14 13:32:39,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:39,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625300718] [2024-06-14 13:32:39,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:39,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:39,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:39,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:39,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:39,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625300718] [2024-06-14 13:32:39,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625300718] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:39,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:39,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:39,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251969000] [2024-06-14 13:32:39,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:39,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:39,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:39,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:39,912 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:39,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:39,986 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 412 places, 510 transitions, 6991 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 13:32:39,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:39,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:39,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:41,633 INFO L124 PetriNetUnfolderBase]: 4112/6342 cut-off events. [2024-06-14 13:32:41,634 INFO L125 PetriNetUnfolderBase]: For 818021/818027 co-relation queries the response was YES. [2024-06-14 13:32:41,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53955 conditions, 6342 events. 4112/6342 cut-off events. For 818021/818027 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 36425 event pairs, 838 based on Foata normal form. 8/6347 useless extension candidates. Maximal degree in co-relation 53768. Up to 6162 conditions per place. [2024-06-14 13:32:41,741 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 470 selfloop transitions, 69 changer transitions 0/542 dead transitions. [2024-06-14 13:32:41,741 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 542 transitions, 8265 flow [2024-06-14 13:32:41,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:41,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:41,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 139 transitions. [2024-06-14 13:32:41,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37669376693766937 [2024-06-14 13:32:41,742 INFO L175 Difference]: Start difference. First operand has 412 places, 510 transitions, 6991 flow. Second operand 9 states and 139 transitions. [2024-06-14 13:32:41,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 542 transitions, 8265 flow [2024-06-14 13:32:45,240 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 542 transitions, 8015 flow, removed 27 selfloop flow, removed 5 redundant places. [2024-06-14 13:32:45,246 INFO L231 Difference]: Finished difference. Result has 417 places, 516 transitions, 7015 flow [2024-06-14 13:32:45,246 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6741, PETRI_DIFFERENCE_MINUEND_PLACES=407, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=510, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=441, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7015, PETRI_PLACES=417, PETRI_TRANSITIONS=516} [2024-06-14 13:32:45,246 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 375 predicate places. [2024-06-14 13:32:45,246 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 516 transitions, 7015 flow [2024-06-14 13:32:45,247 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 13:32:45,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:45,247 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 13:32:45,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:32:45,247 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 13:32:45,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:45,247 INFO L85 PathProgramCache]: Analyzing trace with hash 514358673, now seen corresponding path program 3 times [2024-06-14 13:32:45,247 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:45,247 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794917294] [2024-06-14 13:32:45,247 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:45,247 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:45,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:46,032 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:46,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:46,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794917294] [2024-06-14 13:32:46,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794917294] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:46,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:46,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:32:46,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135830735] [2024-06-14 13:32:46,033 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:46,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:32:46,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:46,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:32:46,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:32:46,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:46,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 516 transitions, 7015 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 13:32:46,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:46,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:46,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:47,664 INFO L124 PetriNetUnfolderBase]: 4132/6370 cut-off events. [2024-06-14 13:32:47,664 INFO L125 PetriNetUnfolderBase]: For 843893/843899 co-relation queries the response was YES. [2024-06-14 13:32:47,742 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54110 conditions, 6370 events. 4132/6370 cut-off events. For 843893/843899 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 36581 event pairs, 840 based on Foata normal form. 10/6377 useless extension candidates. Maximal degree in co-relation 53921. Up to 6023 conditions per place. [2024-06-14 13:32:47,767 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 439 selfloop transitions, 107 changer transitions 0/549 dead transitions. [2024-06-14 13:32:47,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 549 transitions, 8281 flow [2024-06-14 13:32:47,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:47,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:47,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:32:47,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:32:47,768 INFO L175 Difference]: Start difference. First operand has 417 places, 516 transitions, 7015 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:32:47,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 549 transitions, 8281 flow [2024-06-14 13:32:50,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 419 places, 549 transitions, 8075 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:32:50,637 INFO L231 Difference]: Finished difference. Result has 420 places, 519 transitions, 7097 flow [2024-06-14 13:32:50,637 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6809, PETRI_DIFFERENCE_MINUEND_PLACES=411, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=516, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7097, PETRI_PLACES=420, PETRI_TRANSITIONS=519} [2024-06-14 13:32:50,637 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 378 predicate places. [2024-06-14 13:32:50,637 INFO L495 AbstractCegarLoop]: Abstraction has has 420 places, 519 transitions, 7097 flow [2024-06-14 13:32:50,637 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 13:32:50,638 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:50,638 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 13:32:50,638 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:32:50,638 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 13:32:50,638 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:50,638 INFO L85 PathProgramCache]: Analyzing trace with hash 248569137, now seen corresponding path program 1 times [2024-06-14 13:32:50,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:50,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196839018] [2024-06-14 13:32:50,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:50,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:50,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:51,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:51,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:51,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196839018] [2024-06-14 13:32:51,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196839018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:51,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:51,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:32:51,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27041576] [2024-06-14 13:32:51,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:51,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:32:51,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:51,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:32:51,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:32:51,933 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:51,933 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 420 places, 519 transitions, 7097 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:51,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:51,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:51,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:32:53,687 INFO L124 PetriNetUnfolderBase]: 4222/6507 cut-off events. [2024-06-14 13:32:53,687 INFO L125 PetriNetUnfolderBase]: For 922441/922445 co-relation queries the response was YES. [2024-06-14 13:32:53,773 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56008 conditions, 6507 events. 4222/6507 cut-off events. For 922441/922445 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 37450 event pairs, 749 based on Foata normal form. 12/6516 useless extension candidates. Maximal degree in co-relation 55818. Up to 5937 conditions per place. [2024-06-14 13:32:53,801 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 462 selfloop transitions, 101 changer transitions 0/566 dead transitions. [2024-06-14 13:32:53,801 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 428 places, 566 transitions, 8693 flow [2024-06-14 13:32:53,802 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:32:53,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:32:53,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:32:53,802 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:32:53,802 INFO L175 Difference]: Start difference. First operand has 420 places, 519 transitions, 7097 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:32:53,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 428 places, 566 transitions, 8693 flow [2024-06-14 13:32:57,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 566 transitions, 8433 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:32:57,546 INFO L231 Difference]: Finished difference. Result has 423 places, 525 transitions, 7133 flow [2024-06-14 13:32:57,546 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6837, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7133, PETRI_PLACES=423, PETRI_TRANSITIONS=525} [2024-06-14 13:32:57,547 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 13:32:57,547 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 525 transitions, 7133 flow [2024-06-14 13:32:57,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:57,547 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:32:57,547 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 13:32:57,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:32:57,547 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 13:32:57,547 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:32:57,547 INFO L85 PathProgramCache]: Analyzing trace with hash -376127347, now seen corresponding path program 2 times [2024-06-14 13:32:57,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:32:57,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528433464] [2024-06-14 13:32:57,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:32:57,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:32:57,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:32:58,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:32:58,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:32:58,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528433464] [2024-06-14 13:32:58,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528433464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:32:58,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:32:58,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:32:58,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657596149] [2024-06-14 13:32:58,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:32:58,687 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:32:58,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:32:58,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:32:58,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:32:58,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:32:58,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 525 transitions, 7133 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:32:58,854 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:32:58,854 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:32:58,854 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:00,794 INFO L124 PetriNetUnfolderBase]: 4266/6575 cut-off events. [2024-06-14 13:33:00,794 INFO L125 PetriNetUnfolderBase]: For 962066/962070 co-relation queries the response was YES. [2024-06-14 13:33:00,871 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56568 conditions, 6575 events. 4266/6575 cut-off events. For 962066/962070 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 37954 event pairs, 879 based on Foata normal form. 16/6588 useless extension candidates. Maximal degree in co-relation 56376. Up to 6217 conditions per place. [2024-06-14 13:33:00,894 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 458 selfloop transitions, 99 changer transitions 0/560 dead transitions. [2024-06-14 13:33:00,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 431 places, 560 transitions, 8427 flow [2024-06-14 13:33:00,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:00,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:00,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:33:00,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:33:00,895 INFO L175 Difference]: Start difference. First operand has 423 places, 525 transitions, 7133 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:33:00,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 431 places, 560 transitions, 8427 flow [2024-06-14 13:33:03,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 427 places, 560 transitions, 8303 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:03,583 INFO L231 Difference]: Finished difference. Result has 428 places, 526 transitions, 7238 flow [2024-06-14 13:33:03,583 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7009, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=426, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7238, PETRI_PLACES=428, PETRI_TRANSITIONS=526} [2024-06-14 13:33:03,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-14 13:33:03,583 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 526 transitions, 7238 flow [2024-06-14 13:33:03,583 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:03,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:03,584 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 13:33:03,584 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:33:03,584 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 13:33:03,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:03,584 INFO L85 PathProgramCache]: Analyzing trace with hash -126785977, now seen corresponding path program 3 times [2024-06-14 13:33:03,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:03,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421155451] [2024-06-14 13:33:03,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:03,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:03,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:04,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:04,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:04,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421155451] [2024-06-14 13:33:04,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421155451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:04,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:04,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:33:04,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820853625] [2024-06-14 13:33:04,836 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:04,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:33:04,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:04,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:33:04,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:33:04,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:04,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 526 transitions, 7238 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:04,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:04,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:04,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:06,774 INFO L124 PetriNetUnfolderBase]: 4310/6643 cut-off events. [2024-06-14 13:33:06,775 INFO L125 PetriNetUnfolderBase]: For 958481/958485 co-relation queries the response was YES. [2024-06-14 13:33:06,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57399 conditions, 6643 events. 4310/6643 cut-off events. For 958481/958485 co-relation queries the response was YES. Maximal size of possible extension queue 394. Compared 38484 event pairs, 877 based on Foata normal form. 12/6652 useless extension candidates. Maximal degree in co-relation 57205. Up to 6235 conditions per place. [2024-06-14 13:33:06,880 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 468 selfloop transitions, 98 changer transitions 0/569 dead transitions. [2024-06-14 13:33:06,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 569 transitions, 8624 flow [2024-06-14 13:33:06,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:06,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:06,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:33:06,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:33:06,881 INFO L175 Difference]: Start difference. First operand has 428 places, 526 transitions, 7238 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:33:06,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 569 transitions, 8624 flow [2024-06-14 13:33:10,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 429 places, 569 transitions, 8417 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:33:10,952 INFO L231 Difference]: Finished difference. Result has 431 places, 531 transitions, 7320 flow [2024-06-14 13:33:10,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7031, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=526, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7320, PETRI_PLACES=431, PETRI_TRANSITIONS=531} [2024-06-14 13:33:10,952 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 13:33:10,952 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 531 transitions, 7320 flow [2024-06-14 13:33:10,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:33:10,952 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:10,953 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 13:33:10,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:33:10,953 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 13:33:10,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:10,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1010378206, now seen corresponding path program 1 times [2024-06-14 13:33:10,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:10,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361587422] [2024-06-14 13:33:10,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:10,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:10,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:12,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:12,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:12,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361587422] [2024-06-14 13:33:12,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361587422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:12,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:12,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:12,051 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250344879] [2024-06-14 13:33:12,051 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:12,051 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:12,051 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:12,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:12,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:12,155 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:12,156 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 531 transitions, 7320 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 13:33:12,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:12,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:12,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:13,919 INFO L124 PetriNetUnfolderBase]: 4365/6721 cut-off events. [2024-06-14 13:33:13,919 INFO L125 PetriNetUnfolderBase]: For 978003/978005 co-relation queries the response was YES. [2024-06-14 13:33:13,998 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58894 conditions, 6721 events. 4365/6721 cut-off events. For 978003/978005 co-relation queries the response was YES. Maximal size of possible extension queue 404. Compared 38981 event pairs, 867 based on Foata normal form. 5/6723 useless extension candidates. Maximal degree in co-relation 58698. Up to 6142 conditions per place. [2024-06-14 13:33:14,021 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 443 selfloop transitions, 128 changer transitions 0/574 dead transitions. [2024-06-14 13:33:14,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 439 places, 574 transitions, 9274 flow [2024-06-14 13:33:14,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:14,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:14,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 153 transitions. [2024-06-14 13:33:14,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4146341463414634 [2024-06-14 13:33:14,022 INFO L175 Difference]: Start difference. First operand has 431 places, 531 transitions, 7320 flow. Second operand 9 states and 153 transitions. [2024-06-14 13:33:14,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 439 places, 574 transitions, 9274 flow [2024-06-14 13:33:17,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 574 transitions, 9067 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:17,868 INFO L231 Difference]: Finished difference. Result has 435 places, 542 transitions, 7725 flow [2024-06-14 13:33:17,868 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7113, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7725, PETRI_PLACES=435, PETRI_TRANSITIONS=542} [2024-06-14 13:33:17,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 393 predicate places. [2024-06-14 13:33:17,869 INFO L495 AbstractCegarLoop]: Abstraction has has 435 places, 542 transitions, 7725 flow [2024-06-14 13:33:17,869 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 13:33:17,869 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:17,869 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 13:33:17,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:33:17,870 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 13:33:17,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:17,870 INFO L85 PathProgramCache]: Analyzing trace with hash -1010586743, now seen corresponding path program 4 times [2024-06-14 13:33:17,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:17,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209697978] [2024-06-14 13:33:17,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:17,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:17,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:18,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:18,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:18,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209697978] [2024-06-14 13:33:18,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209697978] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:18,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:18,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:18,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895466996] [2024-06-14 13:33:18,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:18,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:18,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:18,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:18,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:18,773 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:18,774 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 435 places, 542 transitions, 7725 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 13:33:18,774 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:18,774 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:18,774 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:20,692 INFO L124 PetriNetUnfolderBase]: 4417/6793 cut-off events. [2024-06-14 13:33:20,692 INFO L125 PetriNetUnfolderBase]: For 1031972/1031974 co-relation queries the response was YES. [2024-06-14 13:33:20,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61174 conditions, 6793 events. 4417/6793 cut-off events. For 1031972/1031974 co-relation queries the response was YES. Maximal size of possible extension queue 411. Compared 39435 event pairs, 865 based on Foata normal form. 6/6796 useless extension candidates. Maximal degree in co-relation 60976. Up to 6155 conditions per place. [2024-06-14 13:33:20,794 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 449 selfloop transitions, 134 changer transitions 0/586 dead transitions. [2024-06-14 13:33:20,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 586 transitions, 9759 flow [2024-06-14 13:33:20,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:20,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:20,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-14 13:33:20,795 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4173441734417344 [2024-06-14 13:33:20,795 INFO L175 Difference]: Start difference. First operand has 435 places, 542 transitions, 7725 flow. Second operand 9 states and 154 transitions. [2024-06-14 13:33:20,795 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 586 transitions, 9759 flow [2024-06-14 13:33:23,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 439 places, 586 transitions, 9495 flow, removed 78 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:23,961 INFO L231 Difference]: Finished difference. Result has 440 places, 554 transitions, 8093 flow [2024-06-14 13:33:23,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7485, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8093, PETRI_PLACES=440, PETRI_TRANSITIONS=554} [2024-06-14 13:33:23,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 398 predicate places. [2024-06-14 13:33:23,962 INFO L495 AbstractCegarLoop]: Abstraction has has 440 places, 554 transitions, 8093 flow [2024-06-14 13:33:23,962 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 13:33:23,962 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:23,962 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 13:33:23,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:33:23,963 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 13:33:23,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:23,963 INFO L85 PathProgramCache]: Analyzing trace with hash -378173119, now seen corresponding path program 5 times [2024-06-14 13:33:23,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:23,964 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309737896] [2024-06-14 13:33:23,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:23,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:23,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:24,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:24,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:24,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309737896] [2024-06-14 13:33:24,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309737896] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:24,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:24,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:24,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683983955] [2024-06-14 13:33:24,786 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:24,786 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:24,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:24,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:24,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:24,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:24,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 554 transitions, 8093 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 13:33:24,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:24,888 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:24,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:27,052 INFO L124 PetriNetUnfolderBase]: 4481/6882 cut-off events. [2024-06-14 13:33:27,052 INFO L125 PetriNetUnfolderBase]: For 1086681/1086683 co-relation queries the response was YES. [2024-06-14 13:33:27,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63544 conditions, 6882 events. 4481/6882 cut-off events. For 1086681/1086683 co-relation queries the response was YES. Maximal size of possible extension queue 419. Compared 39979 event pairs, 870 based on Foata normal form. 6/6885 useless extension candidates. Maximal degree in co-relation 63344. Up to 6206 conditions per place. [2024-06-14 13:33:27,153 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 450 selfloop transitions, 143 changer transitions 0/596 dead transitions. [2024-06-14 13:33:27,153 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 596 transitions, 10153 flow [2024-06-14 13:33:27,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:27,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 151 transitions. [2024-06-14 13:33:27,154 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4092140921409214 [2024-06-14 13:33:27,154 INFO L175 Difference]: Start difference. First operand has 440 places, 554 transitions, 8093 flow. Second operand 9 states and 151 transitions. [2024-06-14 13:33:27,154 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 596 transitions, 10153 flow [2024-06-14 13:33:31,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 444 places, 596 transitions, 9839 flow, removed 103 selfloop flow, removed 4 redundant places. [2024-06-14 13:33:31,935 INFO L231 Difference]: Finished difference. Result has 446 places, 566 transitions, 8421 flow [2024-06-14 13:33:31,936 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7815, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=554, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=421, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8421, PETRI_PLACES=446, PETRI_TRANSITIONS=566} [2024-06-14 13:33:31,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-14 13:33:31,936 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 566 transitions, 8421 flow [2024-06-14 13:33:31,936 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 13:33:31,936 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:31,936 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 13:33:31,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:33:31,937 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 13:33:31,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:31,937 INFO L85 PathProgramCache]: Analyzing trace with hash -1010287841, now seen corresponding path program 1 times [2024-06-14 13:33:31,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:31,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065197003] [2024-06-14 13:33:31,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:31,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:31,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:32,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:32,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065197003] [2024-06-14 13:33:32,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065197003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:32,785 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:32,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:32,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [451755856] [2024-06-14 13:33:32,785 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:32,785 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:32,785 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:32,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:32,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:32,875 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:32,875 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 566 transitions, 8421 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 13:33:32,875 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:32,875 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:32,875 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:34,622 INFO L124 PetriNetUnfolderBase]: 4507/6916 cut-off events. [2024-06-14 13:33:34,622 INFO L125 PetriNetUnfolderBase]: For 1105013/1105017 co-relation queries the response was YES. [2024-06-14 13:33:34,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64602 conditions, 6916 events. 4507/6916 cut-off events. For 1105013/1105017 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 40130 event pairs, 899 based on Foata normal form. 6/6919 useless extension candidates. Maximal degree in co-relation 64399. Up to 6726 conditions per place. [2024-06-14 13:33:34,745 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 526 selfloop transitions, 72 changer transitions 0/601 dead transitions. [2024-06-14 13:33:34,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 454 places, 601 transitions, 10143 flow [2024-06-14 13:33:34,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:34,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:34,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:33:34,746 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 13:33:34,746 INFO L175 Difference]: Start difference. First operand has 446 places, 566 transitions, 8421 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:33:34,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 454 places, 601 transitions, 10143 flow [2024-06-14 13:33:39,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 601 transitions, 9832 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-14 13:33:39,460 INFO L231 Difference]: Finished difference. Result has 450 places, 572 transitions, 8470 flow [2024-06-14 13:33:39,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8110, PETRI_DIFFERENCE_MINUEND_PLACES=441, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=497, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8470, PETRI_PLACES=450, PETRI_TRANSITIONS=572} [2024-06-14 13:33:39,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 13:33:39,460 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 572 transitions, 8470 flow [2024-06-14 13:33:39,461 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 13:33:39,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:39,461 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 13:33:39,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:33:39,461 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 13:33:39,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:39,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1144470992, now seen corresponding path program 2 times [2024-06-14 13:33:39,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:39,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467694028] [2024-06-14 13:33:39,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:39,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:40,426 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:40,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:40,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467694028] [2024-06-14 13:33:40,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467694028] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:40,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:40,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:40,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [15207747] [2024-06-14 13:33:40,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:40,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:40,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:40,427 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:40,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:40,546 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 572 transitions, 8470 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 13:33:40,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:40,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:40,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:42,392 INFO L124 PetriNetUnfolderBase]: 4498/6906 cut-off events. [2024-06-14 13:33:42,393 INFO L125 PetriNetUnfolderBase]: For 1114489/1114491 co-relation queries the response was YES. [2024-06-14 13:33:42,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64218 conditions, 6906 events. 4498/6906 cut-off events. For 1114489/1114491 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 40154 event pairs, 872 based on Foata normal form. 5/6908 useless extension candidates. Maximal degree in co-relation 64014. Up to 6388 conditions per place. [2024-06-14 13:33:42,519 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 464 selfloop transitions, 135 changer transitions 0/602 dead transitions. [2024-06-14 13:33:42,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 458 places, 602 transitions, 10237 flow [2024-06-14 13:33:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:42,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:42,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:33:42,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 13:33:42,520 INFO L175 Difference]: Start difference. First operand has 450 places, 572 transitions, 8470 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:33:42,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 458 places, 602 transitions, 10237 flow [2024-06-14 13:33:47,492 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 602 transitions, 10049 flow, removed 59 selfloop flow, removed 5 redundant places. [2024-06-14 13:33:47,499 INFO L231 Difference]: Finished difference. Result has 454 places, 573 transitions, 8608 flow [2024-06-14 13:33:47,499 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8282, PETRI_DIFFERENCE_MINUEND_PLACES=445, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=572, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8608, PETRI_PLACES=454, PETRI_TRANSITIONS=573} [2024-06-14 13:33:47,499 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 13:33:47,499 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 573 transitions, 8608 flow [2024-06-14 13:33:47,499 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 13:33:47,500 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:47,500 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 13:33:47,500 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:33:47,500 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 13:33:47,500 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:47,500 INFO L85 PathProgramCache]: Analyzing trace with hash -383834029, now seen corresponding path program 6 times [2024-06-14 13:33:47,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:47,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9257] [2024-06-14 13:33:47,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:47,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:47,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:48,317 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:48,317 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:48,317 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9257] [2024-06-14 13:33:48,317 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [9257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:48,317 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:48,317 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:48,317 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176237245] [2024-06-14 13:33:48,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:48,318 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:48,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:48,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:48,318 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:48,404 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:48,404 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 573 transitions, 8608 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 13:33:48,404 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:48,404 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:48,404 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:50,287 INFO L124 PetriNetUnfolderBase]: 4506/6917 cut-off events. [2024-06-14 13:33:50,288 INFO L125 PetriNetUnfolderBase]: For 1128982/1128984 co-relation queries the response was YES. [2024-06-14 13:33:50,379 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64841 conditions, 6917 events. 4506/6917 cut-off events. For 1128982/1128984 co-relation queries the response was YES. Maximal size of possible extension queue 426. Compared 40153 event pairs, 881 based on Foata normal form. 4/6918 useless extension candidates. Maximal degree in co-relation 64635. Up to 6242 conditions per place. [2024-06-14 13:33:50,407 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 463 selfloop transitions, 146 changer transitions 0/612 dead transitions. [2024-06-14 13:33:50,407 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 612 transitions, 10797 flow [2024-06-14 13:33:50,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:50,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:50,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:33:50,408 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:33:50,408 INFO L175 Difference]: Start difference. First operand has 454 places, 573 transitions, 8608 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:33:50,408 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 612 transitions, 10797 flow [2024-06-14 13:33:54,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 612 transitions, 10473 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-14 13:33:54,852 INFO L231 Difference]: Finished difference. Result has 458 places, 579 transitions, 8805 flow [2024-06-14 13:33:54,852 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8299, PETRI_DIFFERENCE_MINUEND_PLACES=448, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=431, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8805, PETRI_PLACES=458, PETRI_TRANSITIONS=579} [2024-06-14 13:33:54,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 13:33:54,853 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 579 transitions, 8805 flow [2024-06-14 13:33:54,853 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 13:33:54,853 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:33:54,853 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 13:33:54,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:33:54,853 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 13:33:54,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:33:54,853 INFO L85 PathProgramCache]: Analyzing trace with hash -383714059, now seen corresponding path program 7 times [2024-06-14 13:33:54,854 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:33:54,854 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [623968113] [2024-06-14 13:33:54,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:33:54,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:33:54,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:33:55,721 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:33:55,721 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:33:55,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [623968113] [2024-06-14 13:33:55,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [623968113] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:33:55,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:33:55,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:33:55,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035178316] [2024-06-14 13:33:55,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:33:55,721 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:33:55,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:33:55,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:33:55,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:33:55,791 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:33:55,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 579 transitions, 8805 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 13:33:55,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:33:55,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:33:55,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:33:57,736 INFO L124 PetriNetUnfolderBase]: 4526/6945 cut-off events. [2024-06-14 13:33:57,737 INFO L125 PetriNetUnfolderBase]: For 1148113/1148115 co-relation queries the response was YES. [2024-06-14 13:33:57,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65315 conditions, 6945 events. 4526/6945 cut-off events. For 1148113/1148115 co-relation queries the response was YES. Maximal size of possible extension queue 429. Compared 40308 event pairs, 879 based on Foata normal form. 4/6946 useless extension candidates. Maximal degree in co-relation 65107. Up to 6623 conditions per place. [2024-06-14 13:33:57,855 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 516 selfloop transitions, 93 changer transitions 0/612 dead transitions. [2024-06-14 13:33:57,855 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 466 places, 612 transitions, 10251 flow [2024-06-14 13:33:57,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:33:57,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:33:57,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:33:57,856 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:33:57,856 INFO L175 Difference]: Start difference. First operand has 458 places, 579 transitions, 8805 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:33:57,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 466 places, 612 transitions, 10251 flow [2024-06-14 13:34:02,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 612 transitions, 9942 flow, removed 54 selfloop flow, removed 5 redundant places. [2024-06-14 13:34:02,843 INFO L231 Difference]: Finished difference. Result has 462 places, 585 transitions, 8838 flow [2024-06-14 13:34:02,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8521, PETRI_DIFFERENCE_MINUEND_PLACES=453, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=579, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8838, PETRI_PLACES=462, PETRI_TRANSITIONS=585} [2024-06-14 13:34:02,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 13:34:02,843 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 585 transitions, 8838 flow [2024-06-14 13:34:02,843 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 13:34:02,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:02,844 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 13:34:02,844 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:34:02,844 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 13:34:02,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:02,844 INFO L85 PathProgramCache]: Analyzing trace with hash -383713873, now seen corresponding path program 4 times [2024-06-14 13:34:02,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:02,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539647088] [2024-06-14 13:34:02,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:02,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:02,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:03,672 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:03,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:03,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539647088] [2024-06-14 13:34:03,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539647088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:03,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:03,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:03,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [300146754] [2024-06-14 13:34:03,673 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:03,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:03,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:03,673 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:03,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:03,764 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:34:03,764 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 585 transitions, 8838 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 13:34:03,764 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:03,764 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:34:03,764 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:05,715 INFO L124 PetriNetUnfolderBase]: 4610/7061 cut-off events. [2024-06-14 13:34:05,715 INFO L125 PetriNetUnfolderBase]: For 1233587/1233589 co-relation queries the response was YES. [2024-06-14 13:34:05,819 INFO L83 FinitePrefix]: Finished finitePrefix Result has 67263 conditions, 7061 events. 4610/7061 cut-off events. For 1233587/1233589 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 40998 event pairs, 905 based on Foata normal form. 6/7064 useless extension candidates. Maximal degree in co-relation 67054. Up to 6355 conditions per place. [2024-06-14 13:34:05,852 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 479 selfloop transitions, 147 changer transitions 0/629 dead transitions. [2024-06-14 13:34:05,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 629 transitions, 10936 flow [2024-06-14 13:34:05,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:05,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:05,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:34:05,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:34:05,854 INFO L175 Difference]: Start difference. First operand has 462 places, 585 transitions, 8838 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:34:05,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 629 transitions, 10936 flow [2024-06-14 13:34:10,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 464 places, 629 transitions, 10692 flow, removed 32 selfloop flow, removed 6 redundant places. [2024-06-14 13:34:10,731 INFO L231 Difference]: Finished difference. Result has 466 places, 595 transitions, 9271 flow [2024-06-14 13:34:10,731 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8594, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=585, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9271, PETRI_PLACES=466, PETRI_TRANSITIONS=595} [2024-06-14 13:34:10,731 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 424 predicate places. [2024-06-14 13:34:10,732 INFO L495 AbstractCegarLoop]: Abstraction has has 466 places, 595 transitions, 9271 flow [2024-06-14 13:34:10,732 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 13:34:10,732 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:10,732 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 13:34:10,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:34:10,732 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 13:34:10,732 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:10,732 INFO L85 PathProgramCache]: Analyzing trace with hash -374459443, now seen corresponding path program 5 times [2024-06-14 13:34:10,732 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:10,732 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176163206] [2024-06-14 13:34:10,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:10,732 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:10,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:11,568 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:11,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:11,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176163206] [2024-06-14 13:34:11,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176163206] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:11,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:11,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:11,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636537969] [2024-06-14 13:34:11,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:11,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:11,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:11,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:11,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:11,679 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:34:11,679 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 466 places, 595 transitions, 9271 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 13:34:11,679 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:11,679 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:34:11,679 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:13,624 INFO L124 PetriNetUnfolderBase]: 4693/7176 cut-off events. [2024-06-14 13:34:13,624 INFO L125 PetriNetUnfolderBase]: For 1303372/1303374 co-relation queries the response was YES. [2024-06-14 13:34:13,721 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70123 conditions, 7176 events. 4693/7176 cut-off events. For 1303372/1303374 co-relation queries the response was YES. Maximal size of possible extension queue 445. Compared 41677 event pairs, 903 based on Foata normal form. 6/7179 useless extension candidates. Maximal degree in co-relation 69912. Up to 6420 conditions per place. [2024-06-14 13:34:13,750 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 486 selfloop transitions, 154 changer transitions 0/643 dead transitions. [2024-06-14 13:34:13,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 474 places, 643 transitions, 11686 flow [2024-06-14 13:34:13,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:13,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:13,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-14 13:34:13,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42005420054200543 [2024-06-14 13:34:13,751 INFO L175 Difference]: Start difference. First operand has 466 places, 595 transitions, 9271 flow. Second operand 9 states and 155 transitions. [2024-06-14 13:34:13,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 474 places, 643 transitions, 11686 flow [2024-06-14 13:34:19,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 643 transitions, 11416 flow, removed 91 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:19,051 INFO L231 Difference]: Finished difference. Result has 472 places, 609 transitions, 9648 flow [2024-06-14 13:34:19,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9065, PETRI_DIFFERENCE_MINUEND_PLACES=462, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=454, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9648, PETRI_PLACES=472, PETRI_TRANSITIONS=609} [2024-06-14 13:34:19,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 430 predicate places. [2024-06-14 13:34:19,052 INFO L495 AbstractCegarLoop]: Abstraction has has 472 places, 609 transitions, 9648 flow [2024-06-14 13:34:19,052 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 13:34:19,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:19,052 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 13:34:19,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:34:19,052 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 13:34:19,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:19,053 INFO L85 PathProgramCache]: Analyzing trace with hash -374448097, now seen corresponding path program 2 times [2024-06-14 13:34:19,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:19,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665578947] [2024-06-14 13:34:19,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:19,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:19,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:19,934 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:19,934 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:19,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665578947] [2024-06-14 13:34:19,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [665578947] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:19,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:19,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:19,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478773050] [2024-06-14 13:34:19,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:19,935 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:19,935 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:19,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:19,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:20,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:34:20,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 472 places, 609 transitions, 9648 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 13:34:20,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:20,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:34:20,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:22,137 INFO L124 PetriNetUnfolderBase]: 4719/7210 cut-off events. [2024-06-14 13:34:22,137 INFO L125 PetriNetUnfolderBase]: For 1320648/1320652 co-relation queries the response was YES. [2024-06-14 13:34:22,240 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70746 conditions, 7210 events. 4719/7210 cut-off events. For 1320648/1320652 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 41858 event pairs, 936 based on Foata normal form. 6/7213 useless extension candidates. Maximal degree in co-relation 70532. Up to 7064 conditions per place. [2024-06-14 13:34:22,271 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 576 selfloop transitions, 65 changer transitions 0/644 dead transitions. [2024-06-14 13:34:22,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 482 places, 644 transitions, 11438 flow [2024-06-14 13:34:22,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:34:22,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:34:22,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 163 transitions. [2024-06-14 13:34:22,272 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3614190687361419 [2024-06-14 13:34:22,272 INFO L175 Difference]: Start difference. First operand has 472 places, 609 transitions, 9648 flow. Second operand 11 states and 163 transitions. [2024-06-14 13:34:22,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 482 places, 644 transitions, 11438 flow [2024-06-14 13:34:27,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 478 places, 644 transitions, 11195 flow, removed 29 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:27,195 INFO L231 Difference]: Finished difference. Result has 479 places, 615 transitions, 9719 flow [2024-06-14 13:34:27,195 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9405, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=609, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9719, PETRI_PLACES=479, PETRI_TRANSITIONS=615} [2024-06-14 13:34:27,195 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 437 predicate places. [2024-06-14 13:34:27,196 INFO L495 AbstractCegarLoop]: Abstraction has has 479 places, 615 transitions, 9719 flow [2024-06-14 13:34:27,196 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 13:34:27,196 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:27,196 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 13:34:27,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:34:27,196 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 13:34:27,196 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:27,197 INFO L85 PathProgramCache]: Analyzing trace with hash -374448283, now seen corresponding path program 6 times [2024-06-14 13:34:27,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:27,197 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366429232] [2024-06-14 13:34:27,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:27,197 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:27,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:28,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:28,026 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:28,026 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366429232] [2024-06-14 13:34:28,026 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366429232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:28,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:28,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:28,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479575077] [2024-06-14 13:34:28,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:28,027 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:28,027 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:28,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:28,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:28,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:34:28,142 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 479 places, 615 transitions, 9719 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 13:34:28,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:28,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:34:28,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:30,127 INFO L124 PetriNetUnfolderBase]: 4707/7196 cut-off events. [2024-06-14 13:34:30,127 INFO L125 PetriNetUnfolderBase]: For 1327993/1327995 co-relation queries the response was YES. [2024-06-14 13:34:30,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69967 conditions, 7196 events. 4707/7196 cut-off events. For 1327993/1327995 co-relation queries the response was YES. Maximal size of possible extension queue 449. Compared 41786 event pairs, 902 based on Foata normal form. 6/7199 useless extension candidates. Maximal degree in co-relation 69752. Up to 6448 conditions per place. [2024-06-14 13:34:30,258 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 487 selfloop transitions, 157 changer transitions 0/647 dead transitions. [2024-06-14 13:34:30,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 487 places, 647 transitions, 11591 flow [2024-06-14 13:34:30,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:30,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-14 13:34:30,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41192411924119243 [2024-06-14 13:34:30,259 INFO L175 Difference]: Start difference. First operand has 479 places, 615 transitions, 9719 flow. Second operand 9 states and 152 transitions. [2024-06-14 13:34:30,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 487 places, 647 transitions, 11591 flow [2024-06-14 13:34:35,314 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 480 places, 647 transitions, 11385 flow, removed 66 selfloop flow, removed 7 redundant places. [2024-06-14 13:34:35,322 INFO L231 Difference]: Finished difference. Result has 482 places, 616 transitions, 9863 flow [2024-06-14 13:34:35,322 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9513, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9863, PETRI_PLACES=482, PETRI_TRANSITIONS=616} [2024-06-14 13:34:35,322 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-14 13:34:35,322 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 616 transitions, 9863 flow [2024-06-14 13:34:35,323 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 13:34:35,323 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:35,323 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 13:34:35,323 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:34:35,323 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 13:34:35,323 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:35,323 INFO L85 PathProgramCache]: Analyzing trace with hash -374453832, now seen corresponding path program 3 times [2024-06-14 13:34:35,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:35,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626256245] [2024-06-14 13:34:35,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:35,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:35,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:36,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:36,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:36,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626256245] [2024-06-14 13:34:36,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626256245] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:36,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:36,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:36,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225170878] [2024-06-14 13:34:36,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:36,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:36,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:36,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:36,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:36,375 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:34:36,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 616 transitions, 9863 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 13:34:36,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:36,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:34:36,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:38,585 INFO L124 PetriNetUnfolderBase]: 4766/7278 cut-off events. [2024-06-14 13:34:38,586 INFO L125 PetriNetUnfolderBase]: For 1376501/1376503 co-relation queries the response was YES. [2024-06-14 13:34:38,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72002 conditions, 7278 events. 4766/7278 cut-off events. For 1376501/1376503 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 42367 event pairs, 899 based on Foata normal form. 5/7280 useless extension candidates. Maximal degree in co-relation 71784. Up to 6885 conditions per place. [2024-06-14 13:34:38,722 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 535 selfloop transitions, 116 changer transitions 0/654 dead transitions. [2024-06-14 13:34:38,722 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 654 transitions, 11853 flow [2024-06-14 13:34:38,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:38,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 144 transitions. [2024-06-14 13:34:38,723 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3902439024390244 [2024-06-14 13:34:38,723 INFO L175 Difference]: Start difference. First operand has 482 places, 616 transitions, 9863 flow. Second operand 9 states and 144 transitions. [2024-06-14 13:34:38,723 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 654 transitions, 11853 flow [2024-06-14 13:34:44,130 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 486 places, 654 transitions, 11650 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-14 13:34:44,138 INFO L231 Difference]: Finished difference. Result has 488 places, 629 transitions, 10332 flow [2024-06-14 13:34:44,138 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9660, PETRI_DIFFERENCE_MINUEND_PLACES=478, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=500, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10332, PETRI_PLACES=488, PETRI_TRANSITIONS=629} [2024-06-14 13:34:44,138 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-14 13:34:44,138 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 629 transitions, 10332 flow [2024-06-14 13:34:44,139 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 13:34:44,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:44,139 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 13:34:44,139 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:34:44,139 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 13:34:44,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:44,140 INFO L85 PathProgramCache]: Analyzing trace with hash -374454049, now seen corresponding path program 8 times [2024-06-14 13:34:44,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:44,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1212988934] [2024-06-14 13:34:44,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:44,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:44,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:45,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:45,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:45,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1212988934] [2024-06-14 13:34:45,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1212988934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:45,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:45,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:45,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358377672] [2024-06-14 13:34:45,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:45,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:45,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:45,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:45,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:45,102 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:34:45,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 629 transitions, 10332 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 13:34:45,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:45,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:34:45,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:47,196 INFO L124 PetriNetUnfolderBase]: 4770/7284 cut-off events. [2024-06-14 13:34:47,196 INFO L125 PetriNetUnfolderBase]: For 1393549/1393551 co-relation queries the response was YES. [2024-06-14 13:34:47,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72011 conditions, 7284 events. 4770/7284 cut-off events. For 1393549/1393551 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 42348 event pairs, 899 based on Foata normal form. 6/7287 useless extension candidates. Maximal degree in co-relation 71791. Up to 6890 conditions per place. [2024-06-14 13:34:47,341 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 539 selfloop transitions, 115 changer transitions 0/657 dead transitions. [2024-06-14 13:34:47,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 496 places, 657 transitions, 12009 flow [2024-06-14 13:34:47,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:47,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 145 transitions. [2024-06-14 13:34:47,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39295392953929537 [2024-06-14 13:34:47,342 INFO L175 Difference]: Start difference. First operand has 488 places, 629 transitions, 10332 flow. Second operand 9 states and 145 transitions. [2024-06-14 13:34:47,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 496 places, 657 transitions, 12009 flow [2024-06-14 13:34:51,990 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 489 places, 657 transitions, 11749 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 13:34:51,999 INFO L231 Difference]: Finished difference. Result has 490 places, 632 transitions, 10377 flow [2024-06-14 13:34:52,000 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10072, PETRI_DIFFERENCE_MINUEND_PLACES=481, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=629, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=112, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10377, PETRI_PLACES=490, PETRI_TRANSITIONS=632} [2024-06-14 13:34:52,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 448 predicate places. [2024-06-14 13:34:52,000 INFO L495 AbstractCegarLoop]: Abstraction has has 490 places, 632 transitions, 10377 flow [2024-06-14 13:34:52,000 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 13:34:52,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:34:52,001 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 13:34:52,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:34:52,001 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 13:34:52,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:34:52,001 INFO L85 PathProgramCache]: Analyzing trace with hash -374453677, now seen corresponding path program 3 times [2024-06-14 13:34:52,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:34:52,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1153149805] [2024-06-14 13:34:52,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:34:52,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:34:52,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:34:52,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:34:52,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:34:52,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1153149805] [2024-06-14 13:34:52,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1153149805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:34:52,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:34:52,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:34:52,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329307065] [2024-06-14 13:34:52,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:34:52,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:34:52,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:34:52,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:34:52,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:34:52,975 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:34:52,976 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 490 places, 632 transitions, 10377 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 13:34:52,976 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:34:52,976 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:34:52,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:34:55,110 INFO L124 PetriNetUnfolderBase]: 4764/7274 cut-off events. [2024-06-14 13:34:55,110 INFO L125 PetriNetUnfolderBase]: For 1388881/1388885 co-relation queries the response was YES. [2024-06-14 13:34:55,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71766 conditions, 7274 events. 4764/7274 cut-off events. For 1388881/1388885 co-relation queries the response was YES. Maximal size of possible extension queue 458. Compared 42305 event pairs, 936 based on Foata normal form. 6/7277 useless extension candidates. Maximal degree in co-relation 71547. Up to 7131 conditions per place. [2024-06-14 13:34:55,256 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 591 selfloop transitions, 64 changer transitions 0/658 dead transitions. [2024-06-14 13:34:55,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 498 places, 658 transitions, 11789 flow [2024-06-14 13:34:55,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:34:55,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:34:55,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:34:55,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-14 13:34:55,257 INFO L175 Difference]: Start difference. First operand has 490 places, 632 transitions, 10377 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:34:55,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 498 places, 658 transitions, 11789 flow [2024-06-14 13:35:00,534 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 491 places, 658 transitions, 11425 flow, removed 74 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:00,543 INFO L231 Difference]: Finished difference. Result has 492 places, 632 transitions, 10147 flow [2024-06-14 13:35:00,543 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10013, PETRI_DIFFERENCE_MINUEND_PLACES=483, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10147, PETRI_PLACES=492, PETRI_TRANSITIONS=632} [2024-06-14 13:35:00,544 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 450 predicate places. [2024-06-14 13:35:00,544 INFO L495 AbstractCegarLoop]: Abstraction has has 492 places, 632 transitions, 10147 flow [2024-06-14 13:35:00,544 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 13:35:00,544 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:00,544 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 13:35:00,544 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:35:00,545 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:00,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:00,545 INFO L85 PathProgramCache]: Analyzing trace with hash -374459629, now seen corresponding path program 9 times [2024-06-14 13:35:00,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:00,545 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725456046] [2024-06-14 13:35:00,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:00,545 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:00,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:01,545 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 13:35:01,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:01,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725456046] [2024-06-14 13:35:01,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725456046] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:01,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:01,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:01,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160933841] [2024-06-14 13:35:01,546 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:01,546 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:01,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:01,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:01,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:01,622 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:35:01,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 492 places, 632 transitions, 10147 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 13:35:01,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:01,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:35:01,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:03,780 INFO L124 PetriNetUnfolderBase]: 4756/7265 cut-off events. [2024-06-14 13:35:03,780 INFO L125 PetriNetUnfolderBase]: For 1393157/1393159 co-relation queries the response was YES. [2024-06-14 13:35:03,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 71175 conditions, 7265 events. 4756/7265 cut-off events. For 1393157/1393159 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 42279 event pairs, 896 based on Foata normal form. 4/7266 useless extension candidates. Maximal degree in co-relation 70955. Up to 6877 conditions per place. [2024-06-14 13:35:03,924 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 541 selfloop transitions, 117 changer transitions 0/661 dead transitions. [2024-06-14 13:35:03,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 502 places, 661 transitions, 11789 flow [2024-06-14 13:35:03,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:35:03,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:35:03,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 169 transitions. [2024-06-14 13:35:03,925 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37472283813747226 [2024-06-14 13:35:03,925 INFO L175 Difference]: Start difference. First operand has 492 places, 632 transitions, 10147 flow. Second operand 11 states and 169 transitions. [2024-06-14 13:35:03,925 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 502 places, 661 transitions, 11789 flow [2024-06-14 13:35:08,832 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 661 transitions, 11661 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:35:08,840 INFO L231 Difference]: Finished difference. Result has 495 places, 632 transitions, 10259 flow [2024-06-14 13:35:08,840 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10019, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=515, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10259, PETRI_PLACES=495, PETRI_TRANSITIONS=632} [2024-06-14 13:35:08,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 453 predicate places. [2024-06-14 13:35:08,841 INFO L495 AbstractCegarLoop]: Abstraction has has 495 places, 632 transitions, 10259 flow [2024-06-14 13:35:08,841 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 13:35:08,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:08,841 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 13:35:08,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:35:08,841 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:08,841 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:08,841 INFO L85 PathProgramCache]: Analyzing trace with hash 821650381, now seen corresponding path program 7 times [2024-06-14 13:35:08,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:08,841 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559375869] [2024-06-14 13:35:08,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:08,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:08,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:09,742 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 13:35:09,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:09,743 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559375869] [2024-06-14 13:35:09,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559375869] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:09,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:09,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:09,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110828418] [2024-06-14 13:35:09,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:09,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:09,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:09,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:09,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:09,832 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:35:09,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 495 places, 632 transitions, 10259 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 13:35:09,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:09,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:35:09,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:11,881 INFO L124 PetriNetUnfolderBase]: 4897/7460 cut-off events. [2024-06-14 13:35:11,882 INFO L125 PetriNetUnfolderBase]: For 1525568/1525570 co-relation queries the response was YES. [2024-06-14 13:35:12,000 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74799 conditions, 7460 events. 4897/7460 cut-off events. For 1525568/1525570 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 43419 event pairs, 946 based on Foata normal form. 6/7463 useless extension candidates. Maximal degree in co-relation 74578. Up to 6957 conditions per place. [2024-06-14 13:35:12,034 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 565 selfloop transitions, 118 changer transitions 0/686 dead transitions. [2024-06-14 13:35:12,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 686 transitions, 12745 flow [2024-06-14 13:35:12,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:12,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:12,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:35:12,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:35:12,035 INFO L175 Difference]: Start difference. First operand has 495 places, 632 transitions, 10259 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:35:12,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 686 transitions, 12745 flow [2024-06-14 13:35:17,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 494 places, 686 transitions, 12427 flow, removed 31 selfloop flow, removed 9 redundant places. [2024-06-14 13:35:17,351 INFO L231 Difference]: Finished difference. Result has 497 places, 652 transitions, 10755 flow [2024-06-14 13:35:17,352 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9959, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=517, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10755, PETRI_PLACES=497, PETRI_TRANSITIONS=652} [2024-06-14 13:35:17,352 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 455 predicate places. [2024-06-14 13:35:17,352 INFO L495 AbstractCegarLoop]: Abstraction has has 497 places, 652 transitions, 10755 flow [2024-06-14 13:35:17,352 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 13:35:17,352 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:17,352 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 13:35:17,352 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:35:17,352 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:17,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:17,353 INFO L85 PathProgramCache]: Analyzing trace with hash 828893221, now seen corresponding path program 8 times [2024-06-14 13:35:17,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:17,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352721640] [2024-06-14 13:35:17,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:17,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:17,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:18,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:18,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:18,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352721640] [2024-06-14 13:35:18,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352721640] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:18,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:18,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:18,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158192603] [2024-06-14 13:35:18,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:18,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:18,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:18,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:18,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:18,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:35:18,196 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 497 places, 652 transitions, 10755 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 13:35:18,196 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:18,196 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:35:18,196 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:20,343 INFO L124 PetriNetUnfolderBase]: 4917/7488 cut-off events. [2024-06-14 13:35:20,344 INFO L125 PetriNetUnfolderBase]: For 1551203/1551205 co-relation queries the response was YES. [2024-06-14 13:35:20,455 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75536 conditions, 7488 events. 4917/7488 cut-off events. For 1551203/1551205 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 43588 event pairs, 966 based on Foata normal form. 6/7491 useless extension candidates. Maximal degree in co-relation 75312. Up to 7164 conditions per place. [2024-06-14 13:35:20,486 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 579 selfloop transitions, 101 changer transitions 0/683 dead transitions. [2024-06-14 13:35:20,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 505 places, 683 transitions, 12325 flow [2024-06-14 13:35:20,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:20,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:20,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:35:20,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 13:35:20,487 INFO L175 Difference]: Start difference. First operand has 497 places, 652 transitions, 10755 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:35:20,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 505 places, 683 transitions, 12325 flow [2024-06-14 13:35:26,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 501 places, 683 transitions, 12163 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:26,171 INFO L231 Difference]: Finished difference. Result has 503 places, 657 transitions, 10921 flow [2024-06-14 13:35:26,172 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10595, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=652, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10921, PETRI_PLACES=503, PETRI_TRANSITIONS=657} [2024-06-14 13:35:26,172 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-14 13:35:26,172 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 657 transitions, 10921 flow [2024-06-14 13:35:26,172 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 13:35:26,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:26,172 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 13:35:26,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:35:26,172 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:26,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:26,173 INFO L85 PathProgramCache]: Analyzing trace with hash 55357685, now seen corresponding path program 10 times [2024-06-14 13:35:26,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:26,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353239925] [2024-06-14 13:35:26,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:26,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:26,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:27,020 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:27,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:27,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353239925] [2024-06-14 13:35:27,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353239925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:27,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:27,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:27,021 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055481224] [2024-06-14 13:35:27,021 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:27,021 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:27,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:27,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:27,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:27,079 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:35:27,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 657 transitions, 10921 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 13:35:27,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:27,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:35:27,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:29,237 INFO L124 PetriNetUnfolderBase]: 5005/7610 cut-off events. [2024-06-14 13:35:29,237 INFO L125 PetriNetUnfolderBase]: For 1630631/1630633 co-relation queries the response was YES. [2024-06-14 13:35:29,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78348 conditions, 7610 events. 5005/7610 cut-off events. For 1630631/1630633 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 44332 event pairs, 958 based on Foata normal form. 6/7613 useless extension candidates. Maximal degree in co-relation 78121. Up to 7322 conditions per place. [2024-06-14 13:35:29,378 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 606 selfloop transitions, 91 changer transitions 0/700 dead transitions. [2024-06-14 13:35:29,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 511 places, 700 transitions, 13228 flow [2024-06-14 13:35:29,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:29,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:29,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 141 transitions. [2024-06-14 13:35:29,379 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3821138211382114 [2024-06-14 13:35:29,379 INFO L175 Difference]: Start difference. First operand has 503 places, 657 transitions, 10921 flow. Second operand 9 states and 141 transitions. [2024-06-14 13:35:29,379 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 511 places, 700 transitions, 13228 flow [2024-06-14 13:35:35,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 507 places, 700 transitions, 13042 flow, removed 28 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:35,610 INFO L231 Difference]: Finished difference. Result has 510 places, 675 transitions, 11474 flow [2024-06-14 13:35:35,610 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10735, PETRI_DIFFERENCE_MINUEND_PLACES=499, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=657, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11474, PETRI_PLACES=510, PETRI_TRANSITIONS=675} [2024-06-14 13:35:35,610 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 468 predicate places. [2024-06-14 13:35:35,610 INFO L495 AbstractCegarLoop]: Abstraction has has 510 places, 675 transitions, 11474 flow [2024-06-14 13:35:35,611 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 13:35:35,611 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:35,611 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 13:35:35,611 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:35:35,611 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:35,611 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:35,612 INFO L85 PathProgramCache]: Analyzing trace with hash 818168461, now seen corresponding path program 9 times [2024-06-14 13:35:35,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:35,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286647239] [2024-06-14 13:35:35,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:35,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:35,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:36,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:36,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:36,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286647239] [2024-06-14 13:35:36,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [286647239] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:36,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:36,380 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:36,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917203477] [2024-06-14 13:35:36,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:36,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:36,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:36,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:36,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:36,463 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:35:36,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 510 places, 675 transitions, 11474 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 13:35:36,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:36,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:35:36,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:38,738 INFO L124 PetriNetUnfolderBase]: 5025/7638 cut-off events. [2024-06-14 13:35:38,738 INFO L125 PetriNetUnfolderBase]: For 1662071/1662073 co-relation queries the response was YES. [2024-06-14 13:35:38,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78949 conditions, 7638 events. 5025/7638 cut-off events. For 1662071/1662073 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 44435 event pairs, 985 based on Foata normal form. 6/7641 useless extension candidates. Maximal degree in co-relation 78719. Up to 7316 conditions per place. [2024-06-14 13:35:38,880 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 605 selfloop transitions, 96 changer transitions 0/704 dead transitions. [2024-06-14 13:35:38,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 704 transitions, 13082 flow [2024-06-14 13:35:38,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:38,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:38,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 143 transitions. [2024-06-14 13:35:38,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3875338753387534 [2024-06-14 13:35:38,881 INFO L175 Difference]: Start difference. First operand has 510 places, 675 transitions, 11474 flow. Second operand 9 states and 143 transitions. [2024-06-14 13:35:38,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 704 transitions, 13082 flow [2024-06-14 13:35:45,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 704 transitions, 12773 flow, removed 68 selfloop flow, removed 7 redundant places. [2024-06-14 13:35:45,291 INFO L231 Difference]: Finished difference. Result has 514 places, 681 transitions, 11515 flow [2024-06-14 13:35:45,292 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11165, PETRI_DIFFERENCE_MINUEND_PLACES=503, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=675, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=579, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11515, PETRI_PLACES=514, PETRI_TRANSITIONS=681} [2024-06-14 13:35:45,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 472 predicate places. [2024-06-14 13:35:45,292 INFO L495 AbstractCegarLoop]: Abstraction has has 514 places, 681 transitions, 11515 flow [2024-06-14 13:35:45,292 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 13:35:45,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:45,293 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 13:35:45,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:35:45,293 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:45,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:45,294 INFO L85 PathProgramCache]: Analyzing trace with hash -996867189, now seen corresponding path program 11 times [2024-06-14 13:35:45,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:45,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277680876] [2024-06-14 13:35:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:45,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:45,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:46,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:46,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:46,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277680876] [2024-06-14 13:35:46,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277680876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:46,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:46,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996427457] [2024-06-14 13:35:46,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:46,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:46,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:46,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:46,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:46,233 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:35:46,233 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 514 places, 681 transitions, 11515 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 13:35:46,233 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:46,233 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:35:46,233 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:48,461 INFO L124 PetriNetUnfolderBase]: 5019/7630 cut-off events. [2024-06-14 13:35:48,461 INFO L125 PetriNetUnfolderBase]: For 1652535/1652537 co-relation queries the response was YES. [2024-06-14 13:35:48,573 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78609 conditions, 7630 events. 5019/7630 cut-off events. For 1652535/1652537 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 44404 event pairs, 967 based on Foata normal form. 4/7631 useless extension candidates. Maximal degree in co-relation 78378. Up to 7347 conditions per place. [2024-06-14 13:35:48,605 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 613 selfloop transitions, 89 changer transitions 0/705 dead transitions. [2024-06-14 13:35:48,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 522 places, 705 transitions, 13361 flow [2024-06-14 13:35:48,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:48,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:48,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 142 transitions. [2024-06-14 13:35:48,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38482384823848237 [2024-06-14 13:35:48,606 INFO L175 Difference]: Start difference. First operand has 514 places, 681 transitions, 11515 flow. Second operand 9 states and 142 transitions. [2024-06-14 13:35:48,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 522 places, 705 transitions, 13361 flow [2024-06-14 13:35:55,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 518 places, 705 transitions, 13159 flow, removed 36 selfloop flow, removed 4 redundant places. [2024-06-14 13:35:55,794 INFO L231 Difference]: Finished difference. Result has 519 places, 682 transitions, 11541 flow [2024-06-14 13:35:55,794 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11313, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=592, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11541, PETRI_PLACES=519, PETRI_TRANSITIONS=682} [2024-06-14 13:35:55,795 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 477 predicate places. [2024-06-14 13:35:55,795 INFO L495 AbstractCegarLoop]: Abstraction has has 519 places, 682 transitions, 11541 flow [2024-06-14 13:35:55,795 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 13:35:55,795 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:35:55,795 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 13:35:55,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:35:55,796 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:35:55,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:35:55,796 INFO L85 PathProgramCache]: Analyzing trace with hash 1983960685, now seen corresponding path program 4 times [2024-06-14 13:35:55,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:35:55,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1920134951] [2024-06-14 13:35:55,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:35:55,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:35:55,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:35:56,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:35:56,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:35:56,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1920134951] [2024-06-14 13:35:56,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1920134951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:35:56,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:35:56,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:35:56,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871320659] [2024-06-14 13:35:56,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:35:56,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:35:56,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:35:56,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:35:56,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:35:56,813 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:35:56,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 519 places, 682 transitions, 11541 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 13:35:56,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:35:56,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:35:56,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:35:59,059 INFO L124 PetriNetUnfolderBase]: 5061/7686 cut-off events. [2024-06-14 13:35:59,059 INFO L125 PetriNetUnfolderBase]: For 1711361/1711365 co-relation queries the response was YES. [2024-06-14 13:35:59,174 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79940 conditions, 7686 events. 5061/7686 cut-off events. For 1711361/1711365 co-relation queries the response was YES. Maximal size of possible extension queue 488. Compared 44719 event pairs, 974 based on Foata normal form. 6/7689 useless extension candidates. Maximal degree in co-relation 79708. Up to 7573 conditions per place. [2024-06-14 13:35:59,207 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 664 selfloop transitions, 48 changer transitions 0/715 dead transitions. [2024-06-14 13:35:59,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 715 transitions, 13829 flow [2024-06-14 13:35:59,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:35:59,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:35:59,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:35:59,208 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-14 13:35:59,208 INFO L175 Difference]: Start difference. First operand has 519 places, 682 transitions, 11541 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:35:59,208 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 715 transitions, 13829 flow [2024-06-14 13:36:06,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 523 places, 715 transitions, 13654 flow, removed 35 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:06,339 INFO L231 Difference]: Finished difference. Result has 524 places, 691 transitions, 11750 flow [2024-06-14 13:36:06,339 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11366, PETRI_DIFFERENCE_MINUEND_PLACES=515, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=682, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=640, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11750, PETRI_PLACES=524, PETRI_TRANSITIONS=691} [2024-06-14 13:36:06,339 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 482 predicate places. [2024-06-14 13:36:06,339 INFO L495 AbstractCegarLoop]: Abstraction has has 524 places, 691 transitions, 11750 flow [2024-06-14 13:36:06,339 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 13:36:06,339 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:06,340 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 13:36:06,340 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:36:06,340 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:06,340 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:06,340 INFO L85 PathProgramCache]: Analyzing trace with hash 821661541, now seen corresponding path program 10 times [2024-06-14 13:36:06,340 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:06,340 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870434181] [2024-06-14 13:36:06,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:06,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:06,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:07,223 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 13:36:07,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:07,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870434181] [2024-06-14 13:36:07,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870434181] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:07,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:07,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:07,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758210335] [2024-06-14 13:36:07,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:07,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:07,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:07,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:07,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:07,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:36:07,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 524 places, 691 transitions, 11750 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 13:36:07,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:07,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:36:07,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:10,225 INFO L124 PetriNetUnfolderBase]: 5097/7738 cut-off events. [2024-06-14 13:36:10,225 INFO L125 PetriNetUnfolderBase]: For 1772855/1772857 co-relation queries the response was YES. [2024-06-14 13:36:10,334 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80747 conditions, 7738 events. 5097/7738 cut-off events. For 1772855/1772857 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45026 event pairs, 954 based on Foata normal form. 6/7741 useless extension candidates. Maximal degree in co-relation 80514. Up to 7192 conditions per place. [2024-06-14 13:36:10,364 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 592 selfloop transitions, 131 changer transitions 0/726 dead transitions. [2024-06-14 13:36:10,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 726 transitions, 13971 flow [2024-06-14 13:36:10,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:10,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:10,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 150 transitions. [2024-06-14 13:36:10,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4065040650406504 [2024-06-14 13:36:10,365 INFO L175 Difference]: Start difference. First operand has 524 places, 691 transitions, 11750 flow. Second operand 9 states and 150 transitions. [2024-06-14 13:36:10,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 726 transitions, 13971 flow [2024-06-14 13:36:17,418 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 528 places, 726 transitions, 13825 flow, removed 56 selfloop flow, removed 4 redundant places. [2024-06-14 13:36:17,426 INFO L231 Difference]: Finished difference. Result has 529 places, 697 transitions, 12031 flow [2024-06-14 13:36:17,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11604, PETRI_DIFFERENCE_MINUEND_PLACES=520, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=691, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=566, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=12031, PETRI_PLACES=529, PETRI_TRANSITIONS=697} [2024-06-14 13:36:17,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 487 predicate places. [2024-06-14 13:36:17,427 INFO L495 AbstractCegarLoop]: Abstraction has has 529 places, 697 transitions, 12031 flow [2024-06-14 13:36:17,427 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 13:36:17,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:17,427 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:36:17,427 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:36:17,427 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:17,427 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:17,428 INFO L85 PathProgramCache]: Analyzing trace with hash 185816031, now seen corresponding path program 12 times [2024-06-14 13:36:17,428 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:17,428 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936932880] [2024-06-14 13:36:17,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:17,428 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:17,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:18,225 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:18,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:18,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936932880] [2024-06-14 13:36:18,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936932880] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:18,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:18,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:18,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354490771] [2024-06-14 13:36:18,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:18,225 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:18,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:18,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:18,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:18,302 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:36:18,302 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 529 places, 697 transitions, 12031 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 13:36:18,302 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:18,303 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:36:18,303 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:21,274 INFO L124 PetriNetUnfolderBase]: 5091/7730 cut-off events. [2024-06-14 13:36:21,275 INFO L125 PetriNetUnfolderBase]: For 1765449/1765451 co-relation queries the response was YES. [2024-06-14 13:36:21,375 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80865 conditions, 7730 events. 5091/7730 cut-off events. For 1765449/1765451 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 45047 event pairs, 981 based on Foata normal form. 4/7731 useless extension candidates. Maximal degree in co-relation 80630. Up to 7551 conditions per place. [2024-06-14 13:36:21,401 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 648 selfloop transitions, 66 changer transitions 0/717 dead transitions. [2024-06-14 13:36:21,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 537 places, 717 transitions, 13556 flow [2024-06-14 13:36:21,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:21,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:21,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 135 transitions. [2024-06-14 13:36:21,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36585365853658536 [2024-06-14 13:36:21,402 INFO L175 Difference]: Start difference. First operand has 529 places, 697 transitions, 12031 flow. Second operand 9 states and 135 transitions. [2024-06-14 13:36:21,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 537 places, 717 transitions, 13556 flow [2024-06-14 13:36:27,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 532 places, 717 transitions, 13309 flow, removed 30 selfloop flow, removed 5 redundant places. [2024-06-14 13:36:27,108 INFO L231 Difference]: Finished difference. Result has 533 places, 698 transitions, 11965 flow [2024-06-14 13:36:27,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11784, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=697, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=631, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11965, PETRI_PLACES=533, PETRI_TRANSITIONS=698} [2024-06-14 13:36:27,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 491 predicate places. [2024-06-14 13:36:27,109 INFO L495 AbstractCegarLoop]: Abstraction has has 533 places, 698 transitions, 11965 flow [2024-06-14 13:36:27,109 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 13:36:27,109 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:27,109 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 13:36:27,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:36:27,109 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:27,109 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:27,109 INFO L85 PathProgramCache]: Analyzing trace with hash 189541053, now seen corresponding path program 5 times [2024-06-14 13:36:27,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:27,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098628024] [2024-06-14 13:36:27,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:27,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:27,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:27,954 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:27,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:27,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098628024] [2024-06-14 13:36:27,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098628024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:27,955 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:27,955 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:27,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1269187918] [2024-06-14 13:36:27,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:27,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:27,955 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:27,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:27,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:28,071 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:36:28,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 533 places, 698 transitions, 11965 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 13:36:28,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:28,071 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:36:28,071 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:30,934 INFO L124 PetriNetUnfolderBase]: 5085/7720 cut-off events. [2024-06-14 13:36:30,934 INFO L125 PetriNetUnfolderBase]: For 1775653/1775657 co-relation queries the response was YES. [2024-06-14 13:36:31,042 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80312 conditions, 7720 events. 5085/7720 cut-off events. For 1775653/1775657 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 44931 event pairs, 977 based on Foata normal form. 6/7723 useless extension candidates. Maximal degree in co-relation 80076. Up to 7610 conditions per place. [2024-06-14 13:36:31,070 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 669 selfloop transitions, 49 changer transitions 0/721 dead transitions. [2024-06-14 13:36:31,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 721 transitions, 13743 flow [2024-06-14 13:36:31,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:31,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:31,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 138 transitions. [2024-06-14 13:36:31,072 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37398373983739835 [2024-06-14 13:36:31,072 INFO L175 Difference]: Start difference. First operand has 533 places, 698 transitions, 11965 flow. Second operand 9 states and 138 transitions. [2024-06-14 13:36:31,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 721 transitions, 13743 flow [2024-06-14 13:36:37,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 721 transitions, 13462 flow, removed 64 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:37,484 INFO L231 Difference]: Finished difference. Result has 535 places, 698 transitions, 11788 flow [2024-06-14 13:36:37,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11684, PETRI_DIFFERENCE_MINUEND_PLACES=526, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=649, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11788, PETRI_PLACES=535, PETRI_TRANSITIONS=698} [2024-06-14 13:36:37,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-14 13:36:37,485 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 698 transitions, 11788 flow [2024-06-14 13:36:37,485 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 13:36:37,485 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:37,485 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 13:36:37,485 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:36:37,485 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:37,485 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:37,486 INFO L85 PathProgramCache]: Analyzing trace with hash 821655992, now seen corresponding path program 4 times [2024-06-14 13:36:37,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:37,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077829988] [2024-06-14 13:36:37,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:37,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:37,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:38,602 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:38,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:38,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077829988] [2024-06-14 13:36:38,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077829988] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:38,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:38,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:38,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001754369] [2024-06-14 13:36:38,603 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:38,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:38,703 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:36:38,703 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 698 transitions, 11788 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 13:36:38,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:38,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:36:38,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:41,429 INFO L124 PetriNetUnfolderBase]: 5074/7707 cut-off events. [2024-06-14 13:36:41,429 INFO L125 PetriNetUnfolderBase]: For 1778015/1778017 co-relation queries the response was YES. [2024-06-14 13:36:41,536 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79752 conditions, 7707 events. 5074/7707 cut-off events. For 1778015/1778017 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 44882 event pairs, 962 based on Foata normal form. 5/7709 useless extension candidates. Maximal degree in co-relation 79515. Up to 7441 conditions per place. [2024-06-14 13:36:41,565 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 625 selfloop transitions, 92 changer transitions 0/720 dead transitions. [2024-06-14 13:36:41,566 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 543 places, 720 transitions, 13591 flow [2024-06-14 13:36:41,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:36:41,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:36:41,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 140 transitions. [2024-06-14 13:36:41,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3794037940379404 [2024-06-14 13:36:41,566 INFO L175 Difference]: Start difference. First operand has 535 places, 698 transitions, 11788 flow. Second operand 9 states and 140 transitions. [2024-06-14 13:36:41,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 543 places, 720 transitions, 13591 flow [2024-06-14 13:36:49,038 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 720 transitions, 13489 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-06-14 13:36:49,048 INFO L231 Difference]: Finished difference. Result has 538 places, 699 transitions, 11955 flow [2024-06-14 13:36:49,048 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11686, PETRI_DIFFERENCE_MINUEND_PLACES=528, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=698, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11955, PETRI_PLACES=538, PETRI_TRANSITIONS=699} [2024-06-14 13:36:49,048 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-14 13:36:49,048 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 699 transitions, 11955 flow [2024-06-14 13:36:49,049 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 13:36:49,049 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:36:49,049 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 13:36:49,049 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:36:49,049 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:36:49,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:36:49,050 INFO L85 PathProgramCache]: Analyzing trace with hash 197165410, now seen corresponding path program 1 times [2024-06-14 13:36:49,050 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:36:49,050 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1941691954] [2024-06-14 13:36:49,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:36:49,050 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:36:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:36:49,991 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:36:49,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:36:49,991 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1941691954] [2024-06-14 13:36:49,991 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1941691954] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:36:49,991 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:36:49,991 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:36:49,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393830350] [2024-06-14 13:36:49,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:36:49,992 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:36:49,992 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:36:49,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:36:49,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:36:50,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:36:50,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 699 transitions, 11955 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 13:36:50,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:36:50,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:36:50,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:36:52,879 INFO L124 PetriNetUnfolderBase]: 5071/7701 cut-off events. [2024-06-14 13:36:52,879 INFO L125 PetriNetUnfolderBase]: For 1783758/1783762 co-relation queries the response was YES. [2024-06-14 13:36:52,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79960 conditions, 7701 events. 5071/7701 cut-off events. For 1783758/1783762 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 44817 event pairs, 983 based on Foata normal form. 5/7703 useless extension candidates. Maximal degree in co-relation 79721. Up to 7613 conditions per place. [2024-06-14 13:36:53,034 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 672 selfloop transitions, 45 changer transitions 0/720 dead transitions. [2024-06-14 13:36:53,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 545 places, 720 transitions, 13515 flow [2024-06-14 13:36:53,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:36:53,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:36:53,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-14 13:36:53,035 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3780487804878049 [2024-06-14 13:36:53,035 INFO L175 Difference]: Start difference. First operand has 538 places, 699 transitions, 11955 flow. Second operand 8 states and 124 transitions. [2024-06-14 13:36:53,035 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 545 places, 720 transitions, 13515 flow [2024-06-14 13:37:01,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 539 places, 720 transitions, 13291 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:37:01,646 INFO L231 Difference]: Finished difference. Result has 540 places, 701 transitions, 11895 flow [2024-06-14 13:37:01,647 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11731, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=654, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11895, PETRI_PLACES=540, PETRI_TRANSITIONS=701} [2024-06-14 13:37:01,647 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 498 predicate places. [2024-06-14 13:37:01,647 INFO L495 AbstractCegarLoop]: Abstraction has has 540 places, 701 transitions, 11895 flow [2024-06-14 13:37:01,647 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 13:37:01,647 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:01,647 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 13:37:01,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:37:01,647 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:01,648 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:01,648 INFO L85 PathProgramCache]: Analyzing trace with hash 196898097, now seen corresponding path program 11 times [2024-06-14 13:37:01,648 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:01,648 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814039347] [2024-06-14 13:37:01,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:01,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:01,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:02,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:02,478 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:02,478 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814039347] [2024-06-14 13:37:02,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814039347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:02,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:02,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:02,478 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055395199] [2024-06-14 13:37:02,478 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:02,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:02,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:02,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:02,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:02,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:37:02,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 540 places, 701 transitions, 11895 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 13:37:02,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:02,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:37:02,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:05,180 INFO L124 PetriNetUnfolderBase]: 5059/7687 cut-off events. [2024-06-14 13:37:05,180 INFO L125 PetriNetUnfolderBase]: For 1801134/1801136 co-relation queries the response was YES. [2024-06-14 13:37:05,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79260 conditions, 7687 events. 5059/7687 cut-off events. For 1801134/1801136 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 44754 event pairs, 976 based on Foata normal form. 6/7690 useless extension candidates. Maximal degree in co-relation 79020. Up to 7278 conditions per place. [2024-06-14 13:37:05,527 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 609 selfloop transitions, 115 changer transitions 0/727 dead transitions. [2024-06-14 13:37:05,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 548 places, 727 transitions, 13703 flow [2024-06-14 13:37:05,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:05,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:05,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:37:05,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:37:05,528 INFO L175 Difference]: Start difference. First operand has 540 places, 701 transitions, 11895 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:37:05,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 548 places, 727 transitions, 13703 flow [2024-06-14 13:37:12,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 727 transitions, 13534 flow, removed 47 selfloop flow, removed 5 redundant places. [2024-06-14 13:37:12,817 INFO L231 Difference]: Finished difference. Result has 544 places, 701 transitions, 11963 flow [2024-06-14 13:37:12,817 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11726, PETRI_DIFFERENCE_MINUEND_PLACES=535, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=115, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=586, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11963, PETRI_PLACES=544, PETRI_TRANSITIONS=701} [2024-06-14 13:37:12,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-14 13:37:12,817 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 701 transitions, 11963 flow [2024-06-14 13:37:12,817 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 13:37:12,818 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:12,818 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 13:37:12,818 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:37:12,818 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:12,818 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:12,818 INFO L85 PathProgramCache]: Analyzing trace with hash 185816217, now seen corresponding path program 12 times [2024-06-14 13:37:12,818 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:12,818 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870120384] [2024-06-14 13:37:12,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:12,818 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:13,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:13,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:13,664 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870120384] [2024-06-14 13:37:13,664 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870120384] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:13,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:13,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:13,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226180382] [2024-06-14 13:37:13,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:13,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:13,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:13,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:13,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:13,754 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:37:13,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 701 transitions, 11963 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 13:37:13,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:13,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:37:13,755 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:16,500 INFO L124 PetriNetUnfolderBase]: 5047/7671 cut-off events. [2024-06-14 13:37:16,500 INFO L125 PetriNetUnfolderBase]: For 1794018/1794020 co-relation queries the response was YES. [2024-06-14 13:37:16,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78888 conditions, 7671 events. 5047/7671 cut-off events. For 1794018/1794020 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 44707 event pairs, 975 based on Foata normal form. 6/7674 useless extension candidates. Maximal degree in co-relation 78647. Up to 7309 conditions per place. [2024-06-14 13:37:16,629 INFO L140 encePairwiseOnDemand]: 28/41 looper letters, 620 selfloop transitions, 103 changer transitions 0/726 dead transitions. [2024-06-14 13:37:16,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 552 places, 726 transitions, 13505 flow [2024-06-14 13:37:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:16,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:16,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:37:16,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:37:16,631 INFO L175 Difference]: Start difference. First operand has 544 places, 701 transitions, 11963 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:37:16,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 552 places, 726 transitions, 13505 flow [2024-06-14 13:37:26,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 726 transitions, 13235 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:26,097 INFO L231 Difference]: Finished difference. Result has 546 places, 701 transitions, 11905 flow [2024-06-14 13:37:26,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11693, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=598, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11905, PETRI_PLACES=546, PETRI_TRANSITIONS=701} [2024-06-14 13:37:26,097 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-14 13:37:26,097 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 701 transitions, 11905 flow [2024-06-14 13:37:26,097 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 13:37:26,097 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:26,097 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 13:37:26,097 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:37:26,098 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:26,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:26,098 INFO L85 PathProgramCache]: Analyzing trace with hash 196898283, now seen corresponding path program 6 times [2024-06-14 13:37:26,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:26,098 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164792170] [2024-06-14 13:37:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:26,098 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:26,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:26,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:26,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:26,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164792170] [2024-06-14 13:37:26,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164792170] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:26,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:26,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:37:26,931 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [211586962] [2024-06-14 13:37:26,931 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:26,931 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:37:26,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:26,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:37:26,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:37:27,018 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:37:27,018 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 701 transitions, 11905 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 13:37:27,018 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:27,018 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:37:27,018 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:29,785 INFO L124 PetriNetUnfolderBase]: 5041/7661 cut-off events. [2024-06-14 13:37:29,785 INFO L125 PetriNetUnfolderBase]: For 1781990/1781994 co-relation queries the response was YES. [2024-06-14 13:37:29,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78622 conditions, 7661 events. 5041/7661 cut-off events. For 1781990/1781994 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 44628 event pairs, 965 based on Foata normal form. 6/7664 useless extension candidates. Maximal degree in co-relation 78380. Up to 7582 conditions per place. [2024-06-14 13:37:29,934 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 682 selfloop transitions, 37 changer transitions 0/722 dead transitions. [2024-06-14 13:37:29,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 554 places, 722 transitions, 13419 flow [2024-06-14 13:37:29,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:29,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:29,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 133 transitions. [2024-06-14 13:37:29,935 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3604336043360434 [2024-06-14 13:37:29,935 INFO L175 Difference]: Start difference. First operand has 546 places, 701 transitions, 11905 flow. Second operand 9 states and 133 transitions. [2024-06-14 13:37:29,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 554 places, 722 transitions, 13419 flow [2024-06-14 13:37:38,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 722 transitions, 13105 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-14 13:37:38,131 INFO L231 Difference]: Finished difference. Result has 548 places, 701 transitions, 11671 flow [2024-06-14 13:37:38,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11591, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=664, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11671, PETRI_PLACES=548, PETRI_TRANSITIONS=701} [2024-06-14 13:37:38,132 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-14 13:37:38,132 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 701 transitions, 11671 flow [2024-06-14 13:37:38,132 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 13:37:38,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:38,133 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 13:37:38,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:37:38,133 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:38,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:38,133 INFO L85 PathProgramCache]: Analyzing trace with hash 197161845, now seen corresponding path program 1 times [2024-06-14 13:37:38,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:38,133 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637512492] [2024-06-14 13:37:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:38,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:39,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:39,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:39,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637512492] [2024-06-14 13:37:39,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637512492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:39,311 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:39,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:37:39,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966189285] [2024-06-14 13:37:39,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:39,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:37:39,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:39,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:37:39,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:37:39,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:37:39,405 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 701 transitions, 11671 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:39,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:39,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:37:39,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:42,213 INFO L124 PetriNetUnfolderBase]: 5085/7731 cut-off events. [2024-06-14 13:37:42,214 INFO L125 PetriNetUnfolderBase]: For 1896390/1896392 co-relation queries the response was YES. [2024-06-14 13:37:42,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78851 conditions, 7731 events. 5085/7731 cut-off events. For 1896390/1896392 co-relation queries the response was YES. Maximal size of possible extension queue 497. Compared 45124 event pairs, 980 based on Foata normal form. 14/7742 useless extension candidates. Maximal degree in co-relation 78608. Up to 7369 conditions per place. [2024-06-14 13:37:42,583 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 631 selfloop transitions, 97 changer transitions 0/731 dead transitions. [2024-06-14 13:37:42,583 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 731 transitions, 13301 flow [2024-06-14 13:37:42,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:42,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:42,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 146 transitions. [2024-06-14 13:37:42,608 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3956639566395664 [2024-06-14 13:37:42,609 INFO L175 Difference]: Start difference. First operand has 548 places, 701 transitions, 11671 flow. Second operand 9 states and 146 transitions. [2024-06-14 13:37:42,609 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 731 transitions, 13301 flow [2024-06-14 13:37:50,353 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 547 places, 731 transitions, 13203 flow, removed 6 selfloop flow, removed 9 redundant places. [2024-06-14 13:37:50,362 INFO L231 Difference]: Finished difference. Result has 548 places, 702 transitions, 11803 flow [2024-06-14 13:37:50,362 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11573, PETRI_DIFFERENCE_MINUEND_PLACES=539, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=604, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11803, PETRI_PLACES=548, PETRI_TRANSITIONS=702} [2024-06-14 13:37:50,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 506 predicate places. [2024-06-14 13:37:50,362 INFO L495 AbstractCegarLoop]: Abstraction has has 548 places, 702 transitions, 11803 flow [2024-06-14 13:37:50,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:50,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:37:50,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:37:50,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:37:50,363 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:37:50,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:37:50,363 INFO L85 PathProgramCache]: Analyzing trace with hash -1541163593, now seen corresponding path program 2 times [2024-06-14 13:37:50,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:37:50,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001206922] [2024-06-14 13:37:50,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:37:50,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:37:50,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:37:51,500 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:37:51,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:37:51,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001206922] [2024-06-14 13:37:51,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001206922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:37:51,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:37:51,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:37:51,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611577722] [2024-06-14 13:37:51,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:37:51,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:37:51,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:37:51,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:37:51,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:37:51,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:37:51,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 548 places, 702 transitions, 11803 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:37:51,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:37:51,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:37:51,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:37:54,599 INFO L124 PetriNetUnfolderBase]: 5129/7799 cut-off events. [2024-06-14 13:37:54,600 INFO L125 PetriNetUnfolderBase]: For 1928116/1928118 co-relation queries the response was YES. [2024-06-14 13:37:54,715 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79864 conditions, 7799 events. 5129/7799 cut-off events. For 1928116/1928118 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 45563 event pairs, 992 based on Foata normal form. 14/7810 useless extension candidates. Maximal degree in co-relation 79620. Up to 7439 conditions per place. [2024-06-14 13:37:54,747 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 640 selfloop transitions, 91 changer transitions 0/734 dead transitions. [2024-06-14 13:37:54,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 734 transitions, 13453 flow [2024-06-14 13:37:54,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:37:54,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:37:54,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-14 13:37:54,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4010840108401084 [2024-06-14 13:37:54,748 INFO L175 Difference]: Start difference. First operand has 548 places, 702 transitions, 11803 flow. Second operand 9 states and 148 transitions. [2024-06-14 13:37:54,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 734 transitions, 13453 flow [2024-06-14 13:38:03,023 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 549 places, 734 transitions, 13247 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:03,032 INFO L231 Difference]: Finished difference. Result has 550 places, 703 transitions, 11816 flow [2024-06-14 13:38:03,033 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11597, PETRI_DIFFERENCE_MINUEND_PLACES=541, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11816, PETRI_PLACES=550, PETRI_TRANSITIONS=703} [2024-06-14 13:38:03,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 508 predicate places. [2024-06-14 13:38:03,033 INFO L495 AbstractCegarLoop]: Abstraction has has 550 places, 703 transitions, 11816 flow [2024-06-14 13:38:03,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:03,033 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:03,034 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 13:38:03,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:38:03,034 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:03,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:03,034 INFO L85 PathProgramCache]: Analyzing trace with hash 817839055, now seen corresponding path program 4 times [2024-06-14 13:38:03,034 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:03,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861701203] [2024-06-14 13:38:03,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:03,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:04,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:04,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:04,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861701203] [2024-06-14 13:38:04,262 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [861701203] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:04,262 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:04,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:38:04,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820723441] [2024-06-14 13:38:04,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:04,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:38:04,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:04,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:38:04,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:38:04,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:38:04,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 550 places, 703 transitions, 11816 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:04,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:04,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:38:04,343 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:07,108 INFO L124 PetriNetUnfolderBase]: 5165/7855 cut-off events. [2024-06-14 13:38:07,108 INFO L125 PetriNetUnfolderBase]: For 1918584/1918586 co-relation queries the response was YES. [2024-06-14 13:38:07,461 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80361 conditions, 7855 events. 5165/7855 cut-off events. For 1918584/1918586 co-relation queries the response was YES. Maximal size of possible extension queue 504. Compared 45939 event pairs, 984 based on Foata normal form. 10/7862 useless extension candidates. Maximal degree in co-relation 80116. Up to 7393 conditions per place. [2024-06-14 13:38:07,499 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 643 selfloop transitions, 93 changer transitions 0/739 dead transitions. [2024-06-14 13:38:07,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 739 transitions, 13522 flow [2024-06-14 13:38:07,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:07,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:07,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 149 transitions. [2024-06-14 13:38:07,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4037940379403794 [2024-06-14 13:38:07,500 INFO L175 Difference]: Start difference. First operand has 550 places, 703 transitions, 11816 flow. Second operand 9 states and 149 transitions. [2024-06-14 13:38:07,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 739 transitions, 13522 flow [2024-06-14 13:38:15,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 551 places, 739 transitions, 13325 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:15,886 INFO L231 Difference]: Finished difference. Result has 553 places, 706 transitions, 11885 flow [2024-06-14 13:38:15,887 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11619, PETRI_DIFFERENCE_MINUEND_PLACES=543, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=610, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11885, PETRI_PLACES=553, PETRI_TRANSITIONS=706} [2024-06-14 13:38:15,887 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 511 predicate places. [2024-06-14 13:38:15,887 INFO L495 AbstractCegarLoop]: Abstraction has has 553 places, 706 transitions, 11885 flow [2024-06-14 13:38:15,887 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:15,887 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:15,887 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 13:38:15,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:38:15,887 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:15,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:15,888 INFO L85 PathProgramCache]: Analyzing trace with hash 829289959, now seen corresponding path program 3 times [2024-06-14 13:38:15,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:15,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016010171] [2024-06-14 13:38:15,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:15,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:17,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:17,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:17,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016010171] [2024-06-14 13:38:17,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016010171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:17,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:17,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-14 13:38:17,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190179209] [2024-06-14 13:38:17,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:17,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-14 13:38:17,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:17,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-14 13:38:17,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2024-06-14 13:38:17,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:38:17,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 553 places, 706 transitions, 11885 flow. Second operand has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:17,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:17,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:38:17,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:20,088 INFO L124 PetriNetUnfolderBase]: 5193/7899 cut-off events. [2024-06-14 13:38:20,089 INFO L125 PetriNetUnfolderBase]: For 1944857/1944859 co-relation queries the response was YES. [2024-06-14 13:38:20,201 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80833 conditions, 7899 events. 5193/7899 cut-off events. For 1944857/1944859 co-relation queries the response was YES. Maximal size of possible extension queue 505. Compared 46298 event pairs, 992 based on Foata normal form. 10/7906 useless extension candidates. Maximal degree in co-relation 80586. Up to 7395 conditions per place. [2024-06-14 13:38:20,231 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 635 selfloop transitions, 100 changer transitions 0/738 dead transitions. [2024-06-14 13:38:20,231 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 561 places, 738 transitions, 13547 flow [2024-06-14 13:38:20,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:20,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:20,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 147 transitions. [2024-06-14 13:38:20,232 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3983739837398374 [2024-06-14 13:38:20,232 INFO L175 Difference]: Start difference. First operand has 553 places, 706 transitions, 11885 flow. Second operand 9 states and 147 transitions. [2024-06-14 13:38:20,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 561 places, 738 transitions, 13547 flow [2024-06-14 13:38:29,691 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 555 places, 738 transitions, 13339 flow, removed 19 selfloop flow, removed 6 redundant places. [2024-06-14 13:38:29,700 INFO L231 Difference]: Finished difference. Result has 556 places, 707 transitions, 11907 flow [2024-06-14 13:38:29,700 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11677, PETRI_DIFFERENCE_MINUEND_PLACES=547, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=706, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11907, PETRI_PLACES=556, PETRI_TRANSITIONS=707} [2024-06-14 13:38:29,700 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 514 predicate places. [2024-06-14 13:38:29,700 INFO L495 AbstractCegarLoop]: Abstraction has has 556 places, 707 transitions, 11907 flow [2024-06-14 13:38:29,700 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 8.5) internal successors, (102), 12 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:38:29,700 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:29,700 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 13:38:29,701 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:38:29,701 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:29,701 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:29,701 INFO L85 PathProgramCache]: Analyzing trace with hash 802010778, now seen corresponding path program 5 times [2024-06-14 13:38:29,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:29,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53554618] [2024-06-14 13:38:29,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:29,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:29,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:30,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:30,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:30,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53554618] [2024-06-14 13:38:30,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53554618] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:30,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:30,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:30,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727883850] [2024-06-14 13:38:30,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:30,887 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:30,887 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:30,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:30,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:30,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:38:30,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 556 places, 707 transitions, 11907 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 13:38:30,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:30,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:38:30,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:33,630 INFO L124 PetriNetUnfolderBase]: 5217/7933 cut-off events. [2024-06-14 13:38:33,630 INFO L125 PetriNetUnfolderBase]: For 1916846/1916885 co-relation queries the response was YES. [2024-06-14 13:38:33,747 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81404 conditions, 7933 events. 5217/7933 cut-off events. For 1916846/1916885 co-relation queries the response was YES. Maximal size of possible extension queue 507. Compared 46559 event pairs, 1010 based on Foata normal form. 27/7953 useless extension candidates. Maximal degree in co-relation 81156. Up to 7719 conditions per place. [2024-06-14 13:38:33,778 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 633 selfloop transitions, 108 changer transitions 0/744 dead transitions. [2024-06-14 13:38:33,778 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 565 places, 744 transitions, 13966 flow [2024-06-14 13:38:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:38:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:38:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 153 transitions. [2024-06-14 13:38:33,779 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37317073170731707 [2024-06-14 13:38:33,779 INFO L175 Difference]: Start difference. First operand has 556 places, 707 transitions, 11907 flow. Second operand 10 states and 153 transitions. [2024-06-14 13:38:33,779 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 565 places, 744 transitions, 13966 flow [2024-06-14 13:38:41,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 558 places, 744 transitions, 13750 flow, removed 9 selfloop flow, removed 7 redundant places. [2024-06-14 13:38:41,733 INFO L231 Difference]: Finished difference. Result has 560 places, 716 transitions, 12149 flow [2024-06-14 13:38:41,733 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11691, PETRI_DIFFERENCE_MINUEND_PLACES=549, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=707, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=102, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=602, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=12149, PETRI_PLACES=560, PETRI_TRANSITIONS=716} [2024-06-14 13:38:41,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 518 predicate places. [2024-06-14 13:38:41,734 INFO L495 AbstractCegarLoop]: Abstraction has has 560 places, 716 transitions, 12149 flow [2024-06-14 13:38:41,734 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 13:38:41,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:38:41,734 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 13:38:41,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:38:41,734 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:38:41,734 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:38:41,734 INFO L85 PathProgramCache]: Analyzing trace with hash 801802241, now seen corresponding path program 13 times [2024-06-14 13:38:41,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:38:41,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924169923] [2024-06-14 13:38:41,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:38:41,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:38:41,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:38:42,596 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:38:42,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:38:42,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924169923] [2024-06-14 13:38:42,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924169923] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:38:42,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:38:42,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:38:42,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756774080] [2024-06-14 13:38:42,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:38:42,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:38:42,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:38:42,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:38:42,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:38:42,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 41 [2024-06-14 13:38:42,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 560 places, 716 transitions, 12149 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 13:38:42,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:38:42,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 41 [2024-06-14 13:38:42,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:38:45,618 INFO L124 PetriNetUnfolderBase]: 5293/8041 cut-off events. [2024-06-14 13:38:45,618 INFO L125 PetriNetUnfolderBase]: For 2042653/2042686 co-relation queries the response was YES. [2024-06-14 13:38:45,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84085 conditions, 8041 events. 5293/8041 cut-off events. For 2042653/2042686 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 47236 event pairs, 899 based on Foata normal form. 16/8043 useless extension candidates. Maximal degree in co-relation 83835. Up to 6761 conditions per place. [2024-06-14 13:38:45,761 INFO L140 encePairwiseOnDemand]: 29/41 looper letters, 504 selfloop transitions, 266 changer transitions 0/773 dead transitions. [2024-06-14 13:38:45,761 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 568 places, 773 transitions, 15253 flow [2024-06-14 13:38:45,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:38:45,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:38:45,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 158 transitions. [2024-06-14 13:38:45,762 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4281842818428184 [2024-06-14 13:38:45,762 INFO L175 Difference]: Start difference. First operand has 560 places, 716 transitions, 12149 flow. Second operand 9 states and 158 transitions. [2024-06-14 13:38:45,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 568 places, 773 transitions, 15253 flow