./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.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/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i ./goblint.2024-05-21_14-57-05.files/protection/mix028_power.opt_pso.opt_rmo.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-bcb38a6-m [2024-06-03 19:31:20,939 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 19:31:20,997 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 19:31:21,001 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 19:31:21,002 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 19:31:21,025 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 19:31:21,026 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 19:31:21,026 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 19:31:21,026 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 19:31:21,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 19:31:21,027 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 19:31:21,027 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 19:31:21,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 19:31:21,028 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 19:31:21,031 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 19:31:21,031 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 19:31:21,032 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 19:31:21,035 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 19:31:21,035 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 19:31:21,035 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 19:31:21,037 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 19:31:21,037 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 19:31:21,037 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 19:31:21,037 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 19:31:21,037 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 19:31:21,037 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 19:31:21,038 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 19:31:21,038 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 19:31:21,038 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 19:31:21,038 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 19:31:21,039 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 19:31:21,039 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 19:31:21,039 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:31:21,039 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 19:31:21,040 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 19:31:21,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 19:31:21,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 19:31:21,301 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 19:31:21,326 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 19:31:21,328 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 19:31:21,329 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 19:31:21,330 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 19:31:21,331 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:31:22,459 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 19:31:22,701 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 19:31:22,709 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/mix028_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:31:22,720 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757b13e2a/302c8e1b217246ff971a9d1718cf4ce0/FLAG6745c454e [2024-06-03 19:31:22,729 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/757b13e2a/302c8e1b217246ff971a9d1718cf4ce0 [2024-06-03 19:31:22,731 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 19:31:22,732 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 19:31:22,732 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/protection/mix028_power.opt_pso.opt_rmo.opt.yml/witness.yml [2024-06-03 19:31:22,840 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 19:31:22,841 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 19:31:22,842 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 19:31:22,842 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 19:31:22,845 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 19:31:22,846 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:31:22" (1/2) ... [2024-06-03 19:31:22,846 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2778773a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:22, skipping insertion in model container [2024-06-03 19:31:22,847 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 07:31:22" (1/2) ... [2024-06-03 19:31:22,847 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@db9ad65 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 07:31:22, skipping insertion in model container [2024-06-03 19:31:22,848 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:31:22" (2/2) ... [2024-06-03 19:31:22,848 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2778773a and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:22, skipping insertion in model container [2024-06-03 19:31:22,848 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:31:22" (2/2) ... [2024-06-03 19:31:22,848 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 19:31:22,900 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 19:31:22,901 INFO L97 edCorrectnessWitness]: Location invariant before [L829-L829] (((((((((((((((((! 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$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$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$flush_delayed == (_Bool)0)) && (! multithreaded || ((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 1) && (__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1)))) && (! multithreaded || (((0 <= x && x <= 2) && x <= 127) && ((x == 0 || x == 1) || x == 2)))) && (! multithreaded || ((0 <= z && z <= 1) && (z == 0 || z == 1))) [2024-06-03 19:31:22,901 INFO L97 edCorrectnessWitness]: Location invariant before [L828-L828] (((((((((((((((((! multithreaded || x$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 <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! 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 <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! 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))) [2024-06-03 19:31:22,901 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$w_buff1 == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || x$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$r_buff0_thd0 == (_Bool)0)) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || (((0 <= x$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))) [2024-06-03 19:31:22,901 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 19:31:22,902 INFO L106 edCorrectnessWitness]: ghost_update [L824-L824] multithreaded = 1; [2024-06-03 19:31:22,946 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 19:31:23,290 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:31:23,302 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 19:31:23,428 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 19:31:23,462 INFO L206 MainTranslator]: Completed translation [2024-06-03 19:31:23,463 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23 WrapperNode [2024-06-03 19:31:23,463 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 19:31:23,464 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 19:31:23,465 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 19:31:23,465 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 19:31:23,470 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 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,483 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 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,507 INFO L138 Inliner]: procedures = 175, calls = 45, calls flagged for inlining = 6, calls inlined = 7, statements flattened = 144 [2024-06-03 19:31:23,507 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 19:31:23,507 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 19:31:23,508 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 19:31:23,508 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 19:31:23,518 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,519 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,521 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,533 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]. [2024-06-03 19:31:23,533 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,533 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,540 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,563 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,564 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,566 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,568 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 19:31:23,569 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 19:31:23,569 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 19:31:23,569 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 19:31:23,570 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (1/1) ... [2024-06-03 19:31:23,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 19:31:23,579 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 19:31:23,590 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) [2024-06-03 19:31:23,639 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 [2024-06-03 19:31:23,659 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 19:31:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 19:31:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 19:31:23,660 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 19:31:23,660 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 19:31:23,661 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 19:31:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 19:31:23,661 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 19:31:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 19:31:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 19:31:23,661 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 19:31:23,662 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 19:31:23,663 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 19:31:23,756 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 19:31:23,758 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 19:31:24,139 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 19:31:24,143 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 19:31:24,364 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 19:31:24,364 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 19:31:24,365 INFO L201 PluginConnector]: Adding new model witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:31:24 BoogieIcfgContainer [2024-06-03 19:31:24,365 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 19:31:24,368 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 19:31:24,368 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 19:31:24,370 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 19:31:24,370 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 07:31:22" (1/4) ... [2024-06-03 19:31:24,370 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6606feed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 07:31:24, skipping insertion in model container [2024-06-03 19:31:24,371 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 07:31:22" (2/4) ... [2024-06-03 19:31:24,371 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6606feed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:31:24, skipping insertion in model container [2024-06-03 19:31:24,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 07:31:23" (3/4) ... [2024-06-03 19:31:24,372 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6606feed and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 07:31:24, skipping insertion in model container [2024-06-03 19:31:24,372 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 07:31:24" (4/4) ... [2024-06-03 19:31:24,373 INFO L112 eAbstractionObserver]: Analyzing ICFG mix028_power.opt_pso.opt_rmo.opt.i [2024-06-03 19:31:24,385 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 19:31:24,385 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 19:31:24,385 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 19:31:24,426 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 19:31:24,454 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:31:24,480 INFO L124 PetriNetUnfolderBase]: 0/39 cut-off events. [2024-06-03 19:31:24,480 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:31:24,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49 conditions, 39 events. 0/39 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 65 event pairs, 0 based on Foata normal form. 0/36 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-03 19:31:24,482 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 42 transitions, 96 flow [2024-06-03 19:31:24,484 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 43 places, 33 transitions, 75 flow [2024-06-03 19:31:24,494 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 19:31:24,500 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;@6d9b25c7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 19:31:24,500 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 19:31:24,506 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 19:31:24,507 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 19:31:24,507 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 19:31:24,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:24,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 19:31:24,508 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)] === [2024-06-03 19:31:24,511 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:24,512 INFO L85 PathProgramCache]: Analyzing trace with hash -1346525187, now seen corresponding path program 1 times [2024-06-03 19:31:24,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:24,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269153749] [2024-06-03 19:31:24,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:24,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:24,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:25,477 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:25,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:25,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269153749] [2024-06-03 19:31:25,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269153749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:25,478 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:25,478 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 19:31:25,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597943374] [2024-06-03 19:31:25,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:25,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 19:31:25,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:25,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 19:31:25,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 19:31:25,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 42 [2024-06-03 19:31:25,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 33 transitions, 75 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:25,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:25,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 42 [2024-06-03 19:31:25,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:25,929 INFO L124 PetriNetUnfolderBase]: 1407/2238 cut-off events. [2024-06-03 19:31:25,929 INFO L125 PetriNetUnfolderBase]: For 40/40 co-relation queries the response was YES. [2024-06-03 19:31:25,937 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4444 conditions, 2238 events. 1407/2238 cut-off events. For 40/40 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 11012 event pairs, 989 based on Foata normal form. 1/2150 useless extension candidates. Maximal degree in co-relation 4429. Up to 2105 conditions per place. [2024-06-03 19:31:25,961 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 34 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-06-03 19:31:25,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 177 flow [2024-06-03 19:31:25,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 19:31:25,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 19:31:25,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-06-03 19:31:25,973 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5634920634920635 [2024-06-03 19:31:25,976 INFO L175 Difference]: Start difference. First operand has 43 places, 33 transitions, 75 flow. Second operand 3 states and 71 transitions. [2024-06-03 19:31:25,977 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 177 flow [2024-06-03 19:31:25,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 43 transitions, 172 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:26,000 INFO L231 Difference]: Finished difference. Result has 43 places, 36 transitions, 102 flow [2024-06-03 19:31:26,002 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=102, PETRI_PLACES=43, PETRI_TRANSITIONS=36} [2024-06-03 19:31:26,006 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 0 predicate places. [2024-06-03 19:31:26,008 INFO L495 AbstractCegarLoop]: Abstraction has has 43 places, 36 transitions, 102 flow [2024-06-03 19:31:26,008 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) [2024-06-03 19:31:26,009 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:26,009 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:26,009 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 19:31:26,010 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)] === [2024-06-03 19:31:26,011 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:26,011 INFO L85 PathProgramCache]: Analyzing trace with hash -1225515812, now seen corresponding path program 1 times [2024-06-03 19:31:26,011 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:26,011 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457703083] [2024-06-03 19:31:26,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:26,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:26,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:26,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:26,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457703083] [2024-06-03 19:31:26,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457703083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:26,560 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:26,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 19:31:26,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250741133] [2024-06-03 19:31:26,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:26,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 19:31:26,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:26,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 19:31:26,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 19:31:26,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:26,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 36 transitions, 102 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) [2024-06-03 19:31:26,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:26,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:26,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:26,886 INFO L124 PetriNetUnfolderBase]: 1653/2529 cut-off events. [2024-06-03 19:31:26,886 INFO L125 PetriNetUnfolderBase]: For 458/458 co-relation queries the response was YES. [2024-06-03 19:31:26,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5720 conditions, 2529 events. 1653/2529 cut-off events. For 458/458 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 12025 event pairs, 1038 based on Foata normal form. 3/2519 useless extension candidates. Maximal degree in co-relation 5705. Up to 2441 conditions per place. [2024-06-03 19:31:26,896 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 42 selfloop transitions, 7 changer transitions 0/53 dead transitions. [2024-06-03 19:31:26,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 53 transitions, 246 flow [2024-06-03 19:31:26,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 19:31:26,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 19:31:26,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 88 transitions. [2024-06-03 19:31:26,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5238095238095238 [2024-06-03 19:31:26,898 INFO L175 Difference]: Start difference. First operand has 43 places, 36 transitions, 102 flow. Second operand 4 states and 88 transitions. [2024-06-03 19:31:26,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 53 transitions, 246 flow [2024-06-03 19:31:26,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 53 transitions, 242 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 19:31:26,900 INFO L231 Difference]: Finished difference. Result has 46 places, 39 transitions, 138 flow [2024-06-03 19:31:26,900 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=138, PETRI_PLACES=46, PETRI_TRANSITIONS=39} [2024-06-03 19:31:26,901 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 3 predicate places. [2024-06-03 19:31:26,901 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 39 transitions, 138 flow [2024-06-03 19:31:26,901 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) [2024-06-03 19:31:26,901 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:26,902 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:26,902 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 19:31:26,902 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)] === [2024-06-03 19:31:26,902 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:26,902 INFO L85 PathProgramCache]: Analyzing trace with hash 663716578, now seen corresponding path program 1 times [2024-06-03 19:31:26,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:26,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011317499] [2024-06-03 19:31:26,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:26,903 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:26,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:27,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:27,545 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:27,545 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011317499] [2024-06-03 19:31:27,545 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011317499] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:27,545 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:27,545 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 19:31:27,545 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282502085] [2024-06-03 19:31:27,545 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:27,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 19:31:27,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:27,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 19:31:27,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 19:31:27,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:27,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 39 transitions, 138 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) [2024-06-03 19:31:27,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:27,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:27,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:27,893 INFO L124 PetriNetUnfolderBase]: 1641/2511 cut-off events. [2024-06-03 19:31:27,893 INFO L125 PetriNetUnfolderBase]: For 1294/1294 co-relation queries the response was YES. [2024-06-03 19:31:27,897 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6289 conditions, 2511 events. 1641/2511 cut-off events. For 1294/1294 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11916 event pairs, 746 based on Foata normal form. 6/2504 useless extension candidates. Maximal degree in co-relation 6272. Up to 2393 conditions per place. [2024-06-03 19:31:27,906 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 50 selfloop transitions, 10 changer transitions 0/64 dead transitions. [2024-06-03 19:31:27,906 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 328 flow [2024-06-03 19:31:27,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:31:27,906 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:31:27,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-06-03 19:31:27,907 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142857142857142 [2024-06-03 19:31:27,907 INFO L175 Difference]: Start difference. First operand has 46 places, 39 transitions, 138 flow. Second operand 5 states and 108 transitions. [2024-06-03 19:31:27,907 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 328 flow [2024-06-03 19:31:27,909 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 64 transitions, 314 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-06-03 19:31:27,909 INFO L231 Difference]: Finished difference. Result has 49 places, 42 transitions, 174 flow [2024-06-03 19:31:27,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=174, PETRI_PLACES=49, PETRI_TRANSITIONS=42} [2024-06-03 19:31:27,910 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 6 predicate places. [2024-06-03 19:31:27,910 INFO L495 AbstractCegarLoop]: Abstraction has has 49 places, 42 transitions, 174 flow [2024-06-03 19:31:27,910 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) [2024-06-03 19:31:27,910 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:27,910 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:27,910 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 19:31:27,911 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)] === [2024-06-03 19:31:27,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:27,911 INFO L85 PathProgramCache]: Analyzing trace with hash -2118459871, now seen corresponding path program 1 times [2024-06-03 19:31:27,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:27,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339257600] [2024-06-03 19:31:27,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:27,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:27,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:29,078 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:29,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339257600] [2024-06-03 19:31:29,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339257600] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:29,078 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:29,078 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:29,078 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [457919977] [2024-06-03 19:31:29,079 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:29,079 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:29,079 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:29,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:29,080 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:29,130 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:29,130 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 42 transitions, 174 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) [2024-06-03 19:31:29,130 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:29,130 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:29,131 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:29,493 INFO L124 PetriNetUnfolderBase]: 1632/2496 cut-off events. [2024-06-03 19:31:29,494 INFO L125 PetriNetUnfolderBase]: For 2395/2395 co-relation queries the response was YES. [2024-06-03 19:31:29,497 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6840 conditions, 2496 events. 1632/2496 cut-off events. For 2395/2395 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 11830 event pairs, 582 based on Foata normal form. 6/2489 useless extension candidates. Maximal degree in co-relation 6822. Up to 2348 conditions per place. [2024-06-03 19:31:29,505 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 54 selfloop transitions, 12 changer transitions 0/70 dead transitions. [2024-06-03 19:31:29,506 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 70 transitions, 382 flow [2024-06-03 19:31:29,506 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:29,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:29,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 123 transitions. [2024-06-03 19:31:29,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4880952380952381 [2024-06-03 19:31:29,509 INFO L175 Difference]: Start difference. First operand has 49 places, 42 transitions, 174 flow. Second operand 6 states and 123 transitions. [2024-06-03 19:31:29,509 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 70 transitions, 382 flow [2024-06-03 19:31:29,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 70 transitions, 358 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:29,514 INFO L231 Difference]: Finished difference. Result has 51 places, 43 transitions, 193 flow [2024-06-03 19:31:29,514 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=193, PETRI_PLACES=51, PETRI_TRANSITIONS=43} [2024-06-03 19:31:29,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 8 predicate places. [2024-06-03 19:31:29,516 INFO L495 AbstractCegarLoop]: Abstraction has has 51 places, 43 transitions, 193 flow [2024-06-03 19:31:29,516 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) [2024-06-03 19:31:29,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:29,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:29,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 19:31:29,516 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)] === [2024-06-03 19:31:29,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:29,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1592947963, now seen corresponding path program 1 times [2024-06-03 19:31:29,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:29,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816409029] [2024-06-03 19:31:29,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:29,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:29,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:30,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:30,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:30,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816409029] [2024-06-03 19:31:30,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816409029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:30,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:30,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 19:31:30,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736826864] [2024-06-03 19:31:30,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:30,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 19:31:30,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:30,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 19:31:30,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 19:31:30,264 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 42 [2024-06-03 19:31:30,265 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 43 transitions, 193 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) [2024-06-03 19:31:30,265 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:30,265 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 42 [2024-06-03 19:31:30,265 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:30,571 INFO L124 PetriNetUnfolderBase]: 1375/2213 cut-off events. [2024-06-03 19:31:30,571 INFO L125 PetriNetUnfolderBase]: For 3103/3103 co-relation queries the response was YES. [2024-06-03 19:31:30,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6335 conditions, 2213 events. 1375/2213 cut-off events. For 3103/3103 co-relation queries the response was YES. Maximal size of possible extension queue 103. Compared 10971 event pairs, 673 based on Foata normal form. 2/2178 useless extension candidates. Maximal degree in co-relation 6316. Up to 2047 conditions per place. [2024-06-03 19:31:30,580 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 44 selfloop transitions, 8 changer transitions 0/57 dead transitions. [2024-06-03 19:31:30,580 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 57 transitions, 341 flow [2024-06-03 19:31:30,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:31:30,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:31:30,581 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 91 transitions. [2024-06-03 19:31:30,581 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43333333333333335 [2024-06-03 19:31:30,581 INFO L175 Difference]: Start difference. First operand has 51 places, 43 transitions, 193 flow. Second operand 5 states and 91 transitions. [2024-06-03 19:31:30,581 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 57 transitions, 341 flow [2024-06-03 19:31:30,583 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 308 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:30,584 INFO L231 Difference]: Finished difference. Result has 52 places, 46 transitions, 206 flow [2024-06-03 19:31:30,584 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=206, PETRI_PLACES=52, PETRI_TRANSITIONS=46} [2024-06-03 19:31:30,585 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 9 predicate places. [2024-06-03 19:31:30,585 INFO L495 AbstractCegarLoop]: Abstraction has has 52 places, 46 transitions, 206 flow [2024-06-03 19:31:30,585 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) [2024-06-03 19:31:30,585 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:30,585 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:30,585 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 19:31:30,585 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)] === [2024-06-03 19:31:30,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:30,586 INFO L85 PathProgramCache]: Analyzing trace with hash 2136747659, now seen corresponding path program 1 times [2024-06-03 19:31:30,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:30,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626858398] [2024-06-03 19:31:30,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:30,586 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:30,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:31,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:31,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:31,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626858398] [2024-06-03 19:31:31,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626858398] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:31,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:31,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:31,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348641364] [2024-06-03 19:31:31,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:31,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:31,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:31,242 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:31,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:31,292 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:31,292 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 46 transitions, 206 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) [2024-06-03 19:31:31,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:31,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:31,293 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:31,771 INFO L124 PetriNetUnfolderBase]: 1629/2505 cut-off events. [2024-06-03 19:31:31,771 INFO L125 PetriNetUnfolderBase]: For 5036/5036 co-relation queries the response was YES. [2024-06-03 19:31:31,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7756 conditions, 2505 events. 1629/2505 cut-off events. For 5036/5036 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 11838 event pairs, 791 based on Foata normal form. 3/2507 useless extension candidates. Maximal degree in co-relation 7735. Up to 2382 conditions per place. [2024-06-03 19:31:31,782 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 53 selfloop transitions, 17 changer transitions 0/74 dead transitions. [2024-06-03 19:31:31,791 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 74 transitions, 462 flow [2024-06-03 19:31:31,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:31,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:31,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 108 transitions. [2024-06-03 19:31:31,792 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:31:31,792 INFO L175 Difference]: Start difference. First operand has 52 places, 46 transitions, 206 flow. Second operand 6 states and 108 transitions. [2024-06-03 19:31:31,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 74 transitions, 462 flow [2024-06-03 19:31:31,794 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 74 transitions, 440 flow, removed 5 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:31,795 INFO L231 Difference]: Finished difference. Result has 57 places, 57 transitions, 309 flow [2024-06-03 19:31:31,795 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=309, PETRI_PLACES=57, PETRI_TRANSITIONS=57} [2024-06-03 19:31:31,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 14 predicate places. [2024-06-03 19:31:31,796 INFO L495 AbstractCegarLoop]: Abstraction has has 57 places, 57 transitions, 309 flow [2024-06-03 19:31:31,796 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) [2024-06-03 19:31:31,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:31,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:31,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 19:31:31,797 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)] === [2024-06-03 19:31:31,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1824284786, now seen corresponding path program 1 times [2024-06-03 19:31:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:31,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392250069] [2024-06-03 19:31:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:31,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:31,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:32,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:32,455 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:32,455 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392250069] [2024-06-03 19:31:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392250069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:32,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:32,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:32,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45492836] [2024-06-03 19:31:32,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:32,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:32,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:32,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:32,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:32,532 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:32,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 57 transitions, 309 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) [2024-06-03 19:31:32,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:32,533 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:32,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:32,919 INFO L124 PetriNetUnfolderBase]: 1697/2612 cut-off events. [2024-06-03 19:31:32,919 INFO L125 PetriNetUnfolderBase]: For 7867/7877 co-relation queries the response was YES. [2024-06-03 19:31:32,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9052 conditions, 2612 events. 1697/2612 cut-off events. For 7867/7877 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12379 event pairs, 793 based on Foata normal form. 2/2601 useless extension candidates. Maximal degree in co-relation 9028. Up to 2473 conditions per place. [2024-06-03 19:31:32,931 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 60 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-06-03 19:31:32,931 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 78 transitions, 521 flow [2024-06-03 19:31:32,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:32,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:32,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 105 transitions. [2024-06-03 19:31:32,932 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:31:32,932 INFO L175 Difference]: Start difference. First operand has 57 places, 57 transitions, 309 flow. Second operand 6 states and 105 transitions. [2024-06-03 19:31:32,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 78 transitions, 521 flow [2024-06-03 19:31:32,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 78 transitions, 505 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 19:31:32,937 INFO L231 Difference]: Finished difference. Result has 62 places, 60 transitions, 353 flow [2024-06-03 19:31:32,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=353, PETRI_PLACES=62, PETRI_TRANSITIONS=60} [2024-06-03 19:31:32,938 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 19 predicate places. [2024-06-03 19:31:32,938 INFO L495 AbstractCegarLoop]: Abstraction has has 62 places, 60 transitions, 353 flow [2024-06-03 19:31:32,938 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) [2024-06-03 19:31:32,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:32,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:32,939 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 19:31:32,939 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)] === [2024-06-03 19:31:32,939 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:32,939 INFO L85 PathProgramCache]: Analyzing trace with hash 1343665436, now seen corresponding path program 2 times [2024-06-03 19:31:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:32,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429291557] [2024-06-03 19:31:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:32,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:33,638 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:33,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:33,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429291557] [2024-06-03 19:31:33,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429291557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:33,639 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:33,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:33,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2128683334] [2024-06-03 19:31:33,639 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:33,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:33,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:33,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:33,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:33,713 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:33,713 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 60 transitions, 353 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) [2024-06-03 19:31:33,713 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:33,713 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:33,713 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:34,044 INFO L124 PetriNetUnfolderBase]: 1692/2607 cut-off events. [2024-06-03 19:31:34,044 INFO L125 PetriNetUnfolderBase]: For 10116/10136 co-relation queries the response was YES. [2024-06-03 19:31:34,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9614 conditions, 2607 events. 1692/2607 cut-off events. For 10116/10136 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 12372 event pairs, 800 based on Foata normal form. 10/2604 useless extension candidates. Maximal degree in co-relation 9587. Up to 2448 conditions per place. [2024-06-03 19:31:34,061 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 55 selfloop transitions, 16 changer transitions 0/78 dead transitions. [2024-06-03 19:31:34,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 78 transitions, 563 flow [2024-06-03 19:31:34,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:31:34,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:31:34,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 104 transitions. [2024-06-03 19:31:34,063 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4126984126984127 [2024-06-03 19:31:34,063 INFO L175 Difference]: Start difference. First operand has 62 places, 60 transitions, 353 flow. Second operand 6 states and 104 transitions. [2024-06-03 19:31:34,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 78 transitions, 563 flow [2024-06-03 19:31:34,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 78 transitions, 527 flow, removed 9 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:34,069 INFO L231 Difference]: Finished difference. Result has 64 places, 63 transitions, 393 flow [2024-06-03 19:31:34,070 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=317, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=393, PETRI_PLACES=64, PETRI_TRANSITIONS=63} [2024-06-03 19:31:34,073 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 21 predicate places. [2024-06-03 19:31:34,073 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 63 transitions, 393 flow [2024-06-03 19:31:34,073 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) [2024-06-03 19:31:34,073 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:34,073 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:34,073 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 19:31:34,074 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)] === [2024-06-03 19:31:34,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:34,074 INFO L85 PathProgramCache]: Analyzing trace with hash 1343673372, now seen corresponding path program 1 times [2024-06-03 19:31:34,074 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:34,074 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341721584] [2024-06-03 19:31:34,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:34,074 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:34,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:35,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:35,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:35,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341721584] [2024-06-03 19:31:35,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341721584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:35,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:35,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:35,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175197357] [2024-06-03 19:31:35,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:35,052 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:35,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:35,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:35,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:35,105 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:35,105 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 63 transitions, 393 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) [2024-06-03 19:31:35,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:35,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:35,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:35,490 INFO L124 PetriNetUnfolderBase]: 1637/2543 cut-off events. [2024-06-03 19:31:35,490 INFO L125 PetriNetUnfolderBase]: For 12161/12161 co-relation queries the response was YES. [2024-06-03 19:31:35,494 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9901 conditions, 2543 events. 1637/2543 cut-off events. For 12161/12161 co-relation queries the response was YES. Maximal size of possible extension queue 112. Compared 12146 event pairs, 755 based on Foata normal form. 3/2545 useless extension candidates. Maximal degree in co-relation 9873. Up to 2381 conditions per place. [2024-06-03 19:31:35,502 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 63 selfloop transitions, 21 changer transitions 0/88 dead transitions. [2024-06-03 19:31:35,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 88 transitions, 677 flow [2024-06-03 19:31:35,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:35,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:35,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 124 transitions. [2024-06-03 19:31:35,503 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4217687074829932 [2024-06-03 19:31:35,504 INFO L175 Difference]: Start difference. First operand has 64 places, 63 transitions, 393 flow. Second operand 7 states and 124 transitions. [2024-06-03 19:31:35,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 88 transitions, 677 flow [2024-06-03 19:31:35,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 88 transitions, 625 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:35,510 INFO L231 Difference]: Finished difference. Result has 67 places, 67 transitions, 432 flow [2024-06-03 19:31:35,510 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=432, PETRI_PLACES=67, PETRI_TRANSITIONS=67} [2024-06-03 19:31:35,511 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 24 predicate places. [2024-06-03 19:31:35,511 INFO L495 AbstractCegarLoop]: Abstraction has has 67 places, 67 transitions, 432 flow [2024-06-03 19:31:35,511 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) [2024-06-03 19:31:35,511 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:35,511 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:35,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 19:31:35,511 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)] === [2024-06-03 19:31:35,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:35,512 INFO L85 PathProgramCache]: Analyzing trace with hash 413487814, now seen corresponding path program 1 times [2024-06-03 19:31:35,512 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:35,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440157251] [2024-06-03 19:31:35,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:35,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:35,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:36,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:36,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:36,188 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440157251] [2024-06-03 19:31:36,188 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [440157251] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:36,188 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:36,188 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:36,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578509833] [2024-06-03 19:31:36,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:36,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:36,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:36,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:36,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:36,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:36,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 67 transitions, 432 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) [2024-06-03 19:31:36,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:36,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:36,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:36,782 INFO L124 PetriNetUnfolderBase]: 1756/2680 cut-off events. [2024-06-03 19:31:36,782 INFO L125 PetriNetUnfolderBase]: For 16886/16905 co-relation queries the response was YES. [2024-06-03 19:31:36,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11335 conditions, 2680 events. 1756/2680 cut-off events. For 16886/16905 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12542 event pairs, 680 based on Foata normal form. 5/2678 useless extension candidates. Maximal degree in co-relation 11306. Up to 2493 conditions per place. [2024-06-03 19:31:36,797 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 74 selfloop transitions, 17 changer transitions 0/99 dead transitions. [2024-06-03 19:31:36,797 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 99 transitions, 724 flow [2024-06-03 19:31:36,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 19:31:36,798 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-03 19:31:36,798 INFO L175 Difference]: Start difference. First operand has 67 places, 67 transitions, 432 flow. Second operand 7 states and 125 transitions. [2024-06-03 19:31:36,798 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 99 transitions, 724 flow [2024-06-03 19:31:36,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 99 transitions, 663 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:31:36,804 INFO L231 Difference]: Finished difference. Result has 70 places, 73 transitions, 469 flow [2024-06-03 19:31:36,804 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=371, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=469, PETRI_PLACES=70, PETRI_TRANSITIONS=73} [2024-06-03 19:31:36,805 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 27 predicate places. [2024-06-03 19:31:36,805 INFO L495 AbstractCegarLoop]: Abstraction has has 70 places, 73 transitions, 469 flow [2024-06-03 19:31:36,805 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) [2024-06-03 19:31:36,805 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:36,805 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:36,805 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 19:31:36,805 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)] === [2024-06-03 19:31:36,805 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:36,805 INFO L85 PathProgramCache]: Analyzing trace with hash -1473174902, now seen corresponding path program 1 times [2024-06-03 19:31:36,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:36,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588884194] [2024-06-03 19:31:36,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:36,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:37,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:37,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588884194] [2024-06-03 19:31:37,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588884194] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:37,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:37,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:37,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598601346] [2024-06-03 19:31:37,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:37,496 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:37,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:37,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:37,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:37,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:37,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 73 transitions, 469 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) [2024-06-03 19:31:37,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:37,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:37,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:38,047 INFO L124 PetriNetUnfolderBase]: 1945/2884 cut-off events. [2024-06-03 19:31:38,047 INFO L125 PetriNetUnfolderBase]: For 20742/20742 co-relation queries the response was YES. [2024-06-03 19:31:38,053 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12970 conditions, 2884 events. 1945/2884 cut-off events. For 20742/20742 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13029 event pairs, 701 based on Foata normal form. 3/2886 useless extension candidates. Maximal degree in co-relation 12939. Up to 2812 conditions per place. [2024-06-03 19:31:38,061 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 84 selfloop transitions, 22 changer transitions 0/109 dead transitions. [2024-06-03 19:31:38,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 899 flow [2024-06-03 19:31:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:38,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:38,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 122 transitions. [2024-06-03 19:31:38,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41496598639455784 [2024-06-03 19:31:38,062 INFO L175 Difference]: Start difference. First operand has 70 places, 73 transitions, 469 flow. Second operand 7 states and 122 transitions. [2024-06-03 19:31:38,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 899 flow [2024-06-03 19:31:38,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 109 transitions, 853 flow, removed 14 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:38,071 INFO L231 Difference]: Finished difference. Result has 76 places, 84 transitions, 601 flow [2024-06-03 19:31:38,071 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=423, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=601, PETRI_PLACES=76, PETRI_TRANSITIONS=84} [2024-06-03 19:31:38,071 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 33 predicate places. [2024-06-03 19:31:38,071 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 84 transitions, 601 flow [2024-06-03 19:31:38,071 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) [2024-06-03 19:31:38,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:38,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:38,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 19:31:38,072 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)] === [2024-06-03 19:31:38,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:38,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1473175088, now seen corresponding path program 2 times [2024-06-03 19:31:38,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:38,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75788709] [2024-06-03 19:31:38,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:38,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:38,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:38,863 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:38,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:38,864 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75788709] [2024-06-03 19:31:38,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75788709] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:38,864 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:38,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:38,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834696705] [2024-06-03 19:31:38,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:38,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:38,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:38,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:38,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:38,919 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:38,919 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 84 transitions, 601 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) [2024-06-03 19:31:38,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:38,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:38,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:39,382 INFO L124 PetriNetUnfolderBase]: 1852/2803 cut-off events. [2024-06-03 19:31:39,382 INFO L125 PetriNetUnfolderBase]: For 26796/26827 co-relation queries the response was YES. [2024-06-03 19:31:39,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13682 conditions, 2803 events. 1852/2803 cut-off events. For 26796/26827 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13042 event pairs, 647 based on Foata normal form. 5/2795 useless extension candidates. Maximal degree in co-relation 13648. Up to 2573 conditions per place. [2024-06-03 19:31:39,398 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 81 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-03 19:31:39,398 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 116 transitions, 1011 flow [2024-06-03 19:31:39,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:39,399 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:39,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 127 transitions. [2024-06-03 19:31:39,400 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43197278911564624 [2024-06-03 19:31:39,400 INFO L175 Difference]: Start difference. First operand has 76 places, 84 transitions, 601 flow. Second operand 7 states and 127 transitions. [2024-06-03 19:31:39,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 116 transitions, 1011 flow [2024-06-03 19:31:39,410 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 116 transitions, 961 flow, removed 21 selfloop flow, removed 2 redundant places. [2024-06-03 19:31:39,412 INFO L231 Difference]: Finished difference. Result has 81 places, 90 transitions, 701 flow [2024-06-03 19:31:39,412 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=551, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=84, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=701, PETRI_PLACES=81, PETRI_TRANSITIONS=90} [2024-06-03 19:31:39,412 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 38 predicate places. [2024-06-03 19:31:39,412 INFO L495 AbstractCegarLoop]: Abstraction has has 81 places, 90 transitions, 701 flow [2024-06-03 19:31:39,413 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) [2024-06-03 19:31:39,413 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:39,413 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:39,413 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 19:31:39,413 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)] === [2024-06-03 19:31:39,413 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1064125816, now seen corresponding path program 2 times [2024-06-03 19:31:39,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:39,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304238696] [2024-06-03 19:31:39,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:39,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:39,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:40,195 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:40,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:40,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304238696] [2024-06-03 19:31:40,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304238696] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:40,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:40,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:40,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100703388] [2024-06-03 19:31:40,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:40,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:40,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:40,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:40,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:40,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:40,242 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 90 transitions, 701 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) [2024-06-03 19:31:40,243 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:40,243 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:40,243 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:40,708 INFO L124 PetriNetUnfolderBase]: 2001/2967 cut-off events. [2024-06-03 19:31:40,708 INFO L125 PetriNetUnfolderBase]: For 32002/32014 co-relation queries the response was YES. [2024-06-03 19:31:40,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15123 conditions, 2967 events. 2001/2967 cut-off events. For 32002/32014 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13472 event pairs, 692 based on Foata normal form. 15/2981 useless extension candidates. Maximal degree in co-relation 15087. Up to 2807 conditions per place. [2024-06-03 19:31:40,724 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 85 selfloop transitions, 34 changer transitions 0/122 dead transitions. [2024-06-03 19:31:40,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 122 transitions, 1207 flow [2024-06-03 19:31:40,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:40,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:40,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 19:31:40,725 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 19:31:40,725 INFO L175 Difference]: Start difference. First operand has 81 places, 90 transitions, 701 flow. Second operand 7 states and 123 transitions. [2024-06-03 19:31:40,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 122 transitions, 1207 flow [2024-06-03 19:31:40,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 122 transitions, 1153 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:40,740 INFO L231 Difference]: Finished difference. Result has 86 places, 98 transitions, 835 flow [2024-06-03 19:31:40,740 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=647, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=90, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=835, PETRI_PLACES=86, PETRI_TRANSITIONS=98} [2024-06-03 19:31:40,740 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 43 predicate places. [2024-06-03 19:31:40,740 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 98 transitions, 835 flow [2024-06-03 19:31:40,740 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) [2024-06-03 19:31:40,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:40,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:40,741 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 19:31:40,741 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)] === [2024-06-03 19:31:40,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:40,741 INFO L85 PathProgramCache]: Analyzing trace with hash 419921554, now seen corresponding path program 3 times [2024-06-03 19:31:40,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:40,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2081067198] [2024-06-03 19:31:40,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:40,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:40,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:41,518 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:41,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:41,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2081067198] [2024-06-03 19:31:41,519 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2081067198] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:41,519 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:41,519 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:41,519 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1911378573] [2024-06-03 19:31:41,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:41,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:41,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:41,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:41,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:41,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:41,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 98 transitions, 835 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) [2024-06-03 19:31:41,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:41,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:41,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:42,027 INFO L124 PetriNetUnfolderBase]: 1860/2823 cut-off events. [2024-06-03 19:31:42,027 INFO L125 PetriNetUnfolderBase]: For 37063/37096 co-relation queries the response was YES. [2024-06-03 19:31:42,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15253 conditions, 2823 events. 1860/2823 cut-off events. For 37063/37096 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13177 event pairs, 662 based on Foata normal form. 12/2828 useless extension candidates. Maximal degree in co-relation 15214. Up to 2546 conditions per place. [2024-06-03 19:31:42,042 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 80 selfloop transitions, 31 changer transitions 0/124 dead transitions. [2024-06-03 19:31:42,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 124 transitions, 1223 flow [2024-06-03 19:31:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 126 transitions. [2024-06-03 19:31:42,044 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:31:42,044 INFO L175 Difference]: Start difference. First operand has 86 places, 98 transitions, 835 flow. Second operand 7 states and 126 transitions. [2024-06-03 19:31:42,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 124 transitions, 1223 flow [2024-06-03 19:31:42,063 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 124 transitions, 1118 flow, removed 31 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:42,065 INFO L231 Difference]: Finished difference. Result has 89 places, 101 transitions, 860 flow [2024-06-03 19:31:42,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=730, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=860, PETRI_PLACES=89, PETRI_TRANSITIONS=101} [2024-06-03 19:31:42,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 46 predicate places. [2024-06-03 19:31:42,066 INFO L495 AbstractCegarLoop]: Abstraction has has 89 places, 101 transitions, 860 flow [2024-06-03 19:31:42,066 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) [2024-06-03 19:31:42,066 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:42,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:42,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 19:31:42,066 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)] === [2024-06-03 19:31:42,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:42,067 INFO L85 PathProgramCache]: Analyzing trace with hash 420158890, now seen corresponding path program 3 times [2024-06-03 19:31:42,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:42,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280032189] [2024-06-03 19:31:42,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:42,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:42,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:42,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:42,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:42,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280032189] [2024-06-03 19:31:42,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280032189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:42,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:42,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:31:42,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250587557] [2024-06-03 19:31:42,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:42,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:31:42,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:42,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:31:42,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:31:42,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:42,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 89 places, 101 transitions, 860 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) [2024-06-03 19:31:42,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:42,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:42,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:43,282 INFO L124 PetriNetUnfolderBase]: 1993/2956 cut-off events. [2024-06-03 19:31:43,283 INFO L125 PetriNetUnfolderBase]: For 40414/40426 co-relation queries the response was YES. [2024-06-03 19:31:43,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16089 conditions, 2956 events. 1993/2956 cut-off events. For 40414/40426 co-relation queries the response was YES. Maximal size of possible extension queue 119. Compared 13399 event pairs, 684 based on Foata normal form. 15/2970 useless extension candidates. Maximal degree in co-relation 16049. Up to 2798 conditions per place. [2024-06-03 19:31:43,300 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 81 selfloop transitions, 42 changer transitions 0/126 dead transitions. [2024-06-03 19:31:43,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 126 transitions, 1267 flow [2024-06-03 19:31:43,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:43,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:43,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 121 transitions. [2024-06-03 19:31:43,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41156462585034015 [2024-06-03 19:31:43,302 INFO L175 Difference]: Start difference. First operand has 89 places, 101 transitions, 860 flow. Second operand 7 states and 121 transitions. [2024-06-03 19:31:43,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 126 transitions, 1267 flow [2024-06-03 19:31:43,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 126 transitions, 1161 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:31:43,320 INFO L231 Difference]: Finished difference. Result has 91 places, 105 transitions, 902 flow [2024-06-03 19:31:43,320 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=754, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=902, PETRI_PLACES=91, PETRI_TRANSITIONS=105} [2024-06-03 19:31:43,321 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 48 predicate places. [2024-06-03 19:31:43,321 INFO L495 AbstractCegarLoop]: Abstraction has has 91 places, 105 transitions, 902 flow [2024-06-03 19:31:43,321 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) [2024-06-03 19:31:43,321 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:43,321 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:43,321 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 19:31:43,322 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)] === [2024-06-03 19:31:43,322 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:43,322 INFO L85 PathProgramCache]: Analyzing trace with hash 420167818, now seen corresponding path program 1 times [2024-06-03 19:31:43,322 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:43,322 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237469136] [2024-06-03 19:31:43,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:43,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:43,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:44,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:44,326 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:44,326 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237469136] [2024-06-03 19:31:44,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237469136] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:44,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:44,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:44,329 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537218711] [2024-06-03 19:31:44,329 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:44,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:44,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:44,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:44,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:44,424 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:44,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 105 transitions, 902 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) [2024-06-03 19:31:44,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:44,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:44,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:44,911 INFO L124 PetriNetUnfolderBase]: 1744/2704 cut-off events. [2024-06-03 19:31:44,911 INFO L125 PetriNetUnfolderBase]: For 37643/37643 co-relation queries the response was YES. [2024-06-03 19:31:44,917 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14584 conditions, 2704 events. 1744/2704 cut-off events. For 37643/37643 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12886 event pairs, 560 based on Foata normal form. 6/2709 useless extension candidates. Maximal degree in co-relation 14543. Up to 2510 conditions per place. [2024-06-03 19:31:44,924 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 106 selfloop transitions, 24 changer transitions 0/134 dead transitions. [2024-06-03 19:31:44,924 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 134 transitions, 1336 flow [2024-06-03 19:31:44,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:44,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:44,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:31:44,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:31:44,926 INFO L175 Difference]: Start difference. First operand has 91 places, 105 transitions, 902 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:31:44,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 134 transitions, 1336 flow [2024-06-03 19:31:44,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 134 transitions, 1245 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:44,945 INFO L231 Difference]: Finished difference. Result has 95 places, 108 transitions, 923 flow [2024-06-03 19:31:44,945 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=811, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=923, PETRI_PLACES=95, PETRI_TRANSITIONS=108} [2024-06-03 19:31:44,946 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 52 predicate places. [2024-06-03 19:31:44,946 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 108 transitions, 923 flow [2024-06-03 19:31:44,946 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) [2024-06-03 19:31:44,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:44,946 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:44,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 19:31:44,947 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:31:44,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:44,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1852558405, now seen corresponding path program 1 times [2024-06-03 19:31:44,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:44,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114285927] [2024-06-03 19:31:44,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:44,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:44,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:45,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:45,558 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:45,558 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114285927] [2024-06-03 19:31:45,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114285927] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:45,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:45,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:31:45,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270888222] [2024-06-03 19:31:45,559 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:45,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:31:45,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:45,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:31:45,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:31:45,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:45,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 108 transitions, 923 flow. Second operand has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:45,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:45,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:45,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:46,143 INFO L124 PetriNetUnfolderBase]: 1741/2699 cut-off events. [2024-06-03 19:31:46,143 INFO L125 PetriNetUnfolderBase]: For 40529/40529 co-relation queries the response was YES. [2024-06-03 19:31:46,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14933 conditions, 2699 events. 1741/2699 cut-off events. For 40529/40529 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 12868 event pairs, 579 based on Foata normal form. 1/2699 useless extension candidates. Maximal degree in co-relation 14891. Up to 2579 conditions per place. [2024-06-03 19:31:46,158 INFO L140 encePairwiseOnDemand]: 35/42 looper letters, 104 selfloop transitions, 8 changer transitions 0/116 dead transitions. [2024-06-03 19:31:46,159 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 116 transitions, 1167 flow [2024-06-03 19:31:46,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 19:31:46,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 19:31:46,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-06-03 19:31:46,160 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3952380952380952 [2024-06-03 19:31:46,160 INFO L175 Difference]: Start difference. First operand has 95 places, 108 transitions, 923 flow. Second operand 5 states and 83 transitions. [2024-06-03 19:31:46,160 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 116 transitions, 1167 flow [2024-06-03 19:31:46,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 116 transitions, 1069 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:31:46,182 INFO L231 Difference]: Finished difference. Result has 94 places, 108 transitions, 847 flow [2024-06-03 19:31:46,182 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=825, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=847, PETRI_PLACES=94, PETRI_TRANSITIONS=108} [2024-06-03 19:31:46,182 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 51 predicate places. [2024-06-03 19:31:46,182 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 108 transitions, 847 flow [2024-06-03 19:31:46,182 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 9.857142857142858) internal successors, (69), 7 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:46,183 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:46,183 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:46,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 19:31:46,183 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)] === [2024-06-03 19:31:46,183 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:46,183 INFO L85 PathProgramCache]: Analyzing trace with hash 1572490645, now seen corresponding path program 1 times [2024-06-03 19:31:46,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:46,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610479921] [2024-06-03 19:31:46,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:46,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:46,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:47,113 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:47,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:47,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610479921] [2024-06-03 19:31:47,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610479921] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:47,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:47,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:47,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990512453] [2024-06-03 19:31:47,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:47,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:47,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:47,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:47,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:47,229 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:31:47,229 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 108 transitions, 847 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) [2024-06-03 19:31:47,229 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:47,229 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:31:47,229 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:47,682 INFO L124 PetriNetUnfolderBase]: 1855/2815 cut-off events. [2024-06-03 19:31:47,683 INFO L125 PetriNetUnfolderBase]: For 49877/49879 co-relation queries the response was YES. [2024-06-03 19:31:47,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15944 conditions, 2815 events. 1855/2815 cut-off events. For 49877/49879 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13129 event pairs, 637 based on Foata normal form. 4/2818 useless extension candidates. Maximal degree in co-relation 15901. Up to 2601 conditions per place. [2024-06-03 19:31:47,698 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 100 selfloop transitions, 19 changer transitions 0/134 dead transitions. [2024-06-03 19:31:47,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 134 transitions, 1153 flow [2024-06-03 19:31:47,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:31:47,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:31:47,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 125 transitions. [2024-06-03 19:31:47,699 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42517006802721086 [2024-06-03 19:31:47,699 INFO L175 Difference]: Start difference. First operand has 94 places, 108 transitions, 847 flow. Second operand 7 states and 125 transitions. [2024-06-03 19:31:47,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 134 transitions, 1153 flow [2024-06-03 19:31:47,724 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 134 transitions, 1107 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:31:47,725 INFO L231 Difference]: Finished difference. Result has 97 places, 108 transitions, 851 flow [2024-06-03 19:31:47,725 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=801, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=851, PETRI_PLACES=97, PETRI_TRANSITIONS=108} [2024-06-03 19:31:47,726 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 54 predicate places. [2024-06-03 19:31:47,726 INFO L495 AbstractCegarLoop]: Abstraction has has 97 places, 108 transitions, 851 flow [2024-06-03 19:31:47,726 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) [2024-06-03 19:31:47,726 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:47,726 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:47,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 19:31:47,726 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)] === [2024-06-03 19:31:47,727 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:47,727 INFO L85 PathProgramCache]: Analyzing trace with hash 1572494520, now seen corresponding path program 1 times [2024-06-03 19:31:47,727 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:47,727 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441044228] [2024-06-03 19:31:47,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:47,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:47,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:48,374 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:48,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:48,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441044228] [2024-06-03 19:31:48,374 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441044228] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:48,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:48,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:48,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888602147] [2024-06-03 19:31:48,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:48,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:48,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:48,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:48,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:48,479 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:48,480 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 108 transitions, 851 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) [2024-06-03 19:31:48,480 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:48,480 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:48,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:49,055 INFO L124 PetriNetUnfolderBase]: 2056/3044 cut-off events. [2024-06-03 19:31:49,055 INFO L125 PetriNetUnfolderBase]: For 56151/56151 co-relation queries the response was YES. [2024-06-03 19:31:49,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17520 conditions, 3044 events. 2056/3044 cut-off events. For 56151/56151 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 13812 event pairs, 663 based on Foata normal form. 6/3049 useless extension candidates. Maximal degree in co-relation 17477. Up to 2886 conditions per place. [2024-06-03 19:31:49,072 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 32 changer transitions 0/156 dead transitions. [2024-06-03 19:31:49,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 156 transitions, 1521 flow [2024-06-03 19:31:49,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:49,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:49,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:31:49,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:31:49,075 INFO L175 Difference]: Start difference. First operand has 97 places, 108 transitions, 851 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:31:49,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 156 transitions, 1521 flow [2024-06-03 19:31:49,098 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 156 transitions, 1473 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:31:49,100 INFO L231 Difference]: Finished difference. Result has 101 places, 122 transitions, 1075 flow [2024-06-03 19:31:49,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=803, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=108, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1075, PETRI_PLACES=101, PETRI_TRANSITIONS=122} [2024-06-03 19:31:49,101 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 58 predicate places. [2024-06-03 19:31:49,101 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 122 transitions, 1075 flow [2024-06-03 19:31:49,101 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) [2024-06-03 19:31:49,101 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:49,101 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:49,101 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 19:31:49,102 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)] === [2024-06-03 19:31:49,102 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:49,102 INFO L85 PathProgramCache]: Analyzing trace with hash -488022284, now seen corresponding path program 2 times [2024-06-03 19:31:49,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:49,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547992719] [2024-06-03 19:31:49,102 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:49,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:49,876 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:49,876 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:49,877 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547992719] [2024-06-03 19:31:49,877 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547992719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:49,877 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:49,877 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:49,877 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975650528] [2024-06-03 19:31:49,877 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:49,877 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:49,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:49,878 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:49,878 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:49,927 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:49,928 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 122 transitions, 1075 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) [2024-06-03 19:31:49,928 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:49,928 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:49,928 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:50,535 INFO L124 PetriNetUnfolderBase]: 2308/3401 cut-off events. [2024-06-03 19:31:50,535 INFO L125 PetriNetUnfolderBase]: For 72863/72863 co-relation queries the response was YES. [2024-06-03 19:31:50,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21315 conditions, 3401 events. 2308/3401 cut-off events. For 72863/72863 co-relation queries the response was YES. Maximal size of possible extension queue 151. Compared 15660 event pairs, 621 based on Foata normal form. 6/3406 useless extension candidates. Maximal degree in co-relation 21269. Up to 2898 conditions per place. [2024-06-03 19:31:50,555 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 126 selfloop transitions, 44 changer transitions 0/173 dead transitions. [2024-06-03 19:31:50,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 173 transitions, 1961 flow [2024-06-03 19:31:50,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:50,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:50,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:31:50,556 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 19:31:50,556 INFO L175 Difference]: Start difference. First operand has 101 places, 122 transitions, 1075 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:31:50,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 173 transitions, 1961 flow [2024-06-03 19:31:50,595 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 173 transitions, 1857 flow, removed 45 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:50,597 INFO L231 Difference]: Finished difference. Result has 108 places, 135 transitions, 1290 flow [2024-06-03 19:31:50,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=977, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1290, PETRI_PLACES=108, PETRI_TRANSITIONS=135} [2024-06-03 19:31:50,598 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 65 predicate places. [2024-06-03 19:31:50,598 INFO L495 AbstractCegarLoop]: Abstraction has has 108 places, 135 transitions, 1290 flow [2024-06-03 19:31:50,598 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) [2024-06-03 19:31:50,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:50,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:50,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 19:31:50,599 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)] === [2024-06-03 19:31:50,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:50,599 INFO L85 PathProgramCache]: Analyzing trace with hash -488016704, now seen corresponding path program 3 times [2024-06-03 19:31:50,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:50,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59424013] [2024-06-03 19:31:50,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:50,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:50,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:51,295 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:51,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:51,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59424013] [2024-06-03 19:31:51,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59424013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:51,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:51,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:51,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370177029] [2024-06-03 19:31:51,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:51,297 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:51,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:51,356 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:51,357 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 135 transitions, 1290 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) [2024-06-03 19:31:51,357 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:51,357 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:51,357 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:52,016 INFO L124 PetriNetUnfolderBase]: 2354/3467 cut-off events. [2024-06-03 19:31:52,017 INFO L125 PetriNetUnfolderBase]: For 81748/81748 co-relation queries the response was YES. [2024-06-03 19:31:52,027 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22920 conditions, 3467 events. 2354/3467 cut-off events. For 81748/81748 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 15996 event pairs, 613 based on Foata normal form. 12/3478 useless extension candidates. Maximal degree in co-relation 22871. Up to 2947 conditions per place. [2024-06-03 19:31:52,039 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 121 selfloop transitions, 57 changer transitions 0/181 dead transitions. [2024-06-03 19:31:52,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 181 transitions, 2114 flow [2024-06-03 19:31:52,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:52,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:52,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 148 transitions. [2024-06-03 19:31:52,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.44047619047619047 [2024-06-03 19:31:52,041 INFO L175 Difference]: Start difference. First operand has 108 places, 135 transitions, 1290 flow. Second operand 8 states and 148 transitions. [2024-06-03 19:31:52,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 181 transitions, 2114 flow [2024-06-03 19:31:52,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 181 transitions, 1997 flow, removed 48 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:52,102 INFO L231 Difference]: Finished difference. Result has 115 places, 146 transitions, 1560 flow [2024-06-03 19:31:52,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1187, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=135, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1560, PETRI_PLACES=115, PETRI_TRANSITIONS=146} [2024-06-03 19:31:52,103 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 72 predicate places. [2024-06-03 19:31:52,103 INFO L495 AbstractCegarLoop]: Abstraction has has 115 places, 146 transitions, 1560 flow [2024-06-03 19:31:52,103 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) [2024-06-03 19:31:52,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:52,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:52,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 19:31:52,104 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)] === [2024-06-03 19:31:52,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:52,104 INFO L85 PathProgramCache]: Analyzing trace with hash 1576219387, now seen corresponding path program 1 times [2024-06-03 19:31:52,104 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:52,104 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325342458] [2024-06-03 19:31:52,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:52,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:52,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:53,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:53,155 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:53,155 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325342458] [2024-06-03 19:31:53,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325342458] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:53,155 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:53,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:53,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [24229961] [2024-06-03 19:31:53,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:53,156 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:53,156 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:53,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:53,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:53,239 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:53,239 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 146 transitions, 1560 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) [2024-06-03 19:31:53,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:53,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:53,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:53,835 INFO L124 PetriNetUnfolderBase]: 2342/3449 cut-off events. [2024-06-03 19:31:53,836 INFO L125 PetriNetUnfolderBase]: For 87069/87069 co-relation queries the response was YES. [2024-06-03 19:31:53,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23560 conditions, 3449 events. 2342/3449 cut-off events. For 87069/87069 co-relation queries the response was YES. Maximal size of possible extension queue 154. Compared 15869 event pairs, 676 based on Foata normal form. 3/3451 useless extension candidates. Maximal degree in co-relation 23507. Up to 3366 conditions per place. [2024-06-03 19:31:53,859 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 148 selfloop transitions, 26 changer transitions 0/177 dead transitions. [2024-06-03 19:31:53,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 177 transitions, 2132 flow [2024-06-03 19:31:53,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:53,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:53,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:31:53,860 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:31:53,860 INFO L175 Difference]: Start difference. First operand has 115 places, 146 transitions, 1560 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:31:53,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 177 transitions, 2132 flow [2024-06-03 19:31:53,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 177 transitions, 2047 flow, removed 32 selfloop flow, removed 3 redundant places. [2024-06-03 19:31:53,927 INFO L231 Difference]: Finished difference. Result has 120 places, 149 transitions, 1612 flow [2024-06-03 19:31:53,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1477, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1612, PETRI_PLACES=120, PETRI_TRANSITIONS=149} [2024-06-03 19:31:53,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 77 predicate places. [2024-06-03 19:31:53,927 INFO L495 AbstractCegarLoop]: Abstraction has has 120 places, 149 transitions, 1612 flow [2024-06-03 19:31:53,928 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) [2024-06-03 19:31:53,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:53,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:53,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 19:31:53,928 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)] === [2024-06-03 19:31:53,928 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:53,929 INFO L85 PathProgramCache]: Analyzing trace with hash 140291705, now seen corresponding path program 2 times [2024-06-03 19:31:53,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:53,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12942315] [2024-06-03 19:31:53,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:53,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:53,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:54,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:54,887 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:54,887 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12942315] [2024-06-03 19:31:54,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12942315] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:54,887 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:54,887 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:54,887 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685260110] [2024-06-03 19:31:54,887 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:54,888 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:54,888 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:54,888 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:54,888 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:54,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:54,926 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 149 transitions, 1612 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) [2024-06-03 19:31:54,927 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:54,927 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:54,927 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:55,636 INFO L124 PetriNetUnfolderBase]: 2368/3488 cut-off events. [2024-06-03 19:31:55,636 INFO L125 PetriNetUnfolderBase]: For 89982/89996 co-relation queries the response was YES. [2024-06-03 19:31:55,645 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23739 conditions, 3488 events. 2368/3488 cut-off events. For 89982/89996 co-relation queries the response was YES. Maximal size of possible extension queue 157. Compared 16097 event pairs, 658 based on Foata normal form. 17/3504 useless extension candidates. Maximal degree in co-relation 23684. Up to 3270 conditions per place. [2024-06-03 19:31:55,655 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 127 selfloop transitions, 58 changer transitions 0/188 dead transitions. [2024-06-03 19:31:55,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 188 transitions, 2376 flow [2024-06-03 19:31:55,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:31:55,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:31:55,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 154 transitions. [2024-06-03 19:31:55,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4074074074074074 [2024-06-03 19:31:55,657 INFO L175 Difference]: Start difference. First operand has 120 places, 149 transitions, 1612 flow. Second operand 9 states and 154 transitions. [2024-06-03 19:31:55,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 188 transitions, 2376 flow [2024-06-03 19:31:55,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 188 transitions, 2275 flow, removed 27 selfloop flow, removed 6 redundant places. [2024-06-03 19:31:55,718 INFO L231 Difference]: Finished difference. Result has 123 places, 157 transitions, 1789 flow [2024-06-03 19:31:55,718 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1511, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=54, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1789, PETRI_PLACES=123, PETRI_TRANSITIONS=157} [2024-06-03 19:31:55,718 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 80 predicate places. [2024-06-03 19:31:55,718 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 157 transitions, 1789 flow [2024-06-03 19:31:55,718 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.444444444444445) internal successors, (76), 9 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:31:55,719 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:55,719 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:55,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 19:31:55,719 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)] === [2024-06-03 19:31:55,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:55,719 INFO L85 PathProgramCache]: Analyzing trace with hash 140024578, now seen corresponding path program 4 times [2024-06-03 19:31:55,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:55,720 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339031831] [2024-06-03 19:31:55,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:55,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:55,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:56,444 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:56,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:56,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339031831] [2024-06-03 19:31:56,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [339031831] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:56,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:56,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:56,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349877411] [2024-06-03 19:31:56,445 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:56,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:56,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:56,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:56,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:56,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:56,488 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 157 transitions, 1789 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) [2024-06-03 19:31:56,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:56,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:56,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:57,134 INFO L124 PetriNetUnfolderBase]: 2520/3706 cut-off events. [2024-06-03 19:31:57,135 INFO L125 PetriNetUnfolderBase]: For 107372/107386 co-relation queries the response was YES. [2024-06-03 19:31:57,146 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26147 conditions, 3706 events. 2520/3706 cut-off events. For 107372/107386 co-relation queries the response was YES. Maximal size of possible extension queue 167. Compared 17280 event pairs, 608 based on Foata normal form. 20/3725 useless extension candidates. Maximal degree in co-relation 26091. Up to 2755 conditions per place. [2024-06-03 19:31:57,158 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 109 selfloop transitions, 99 changer transitions 0/211 dead transitions. [2024-06-03 19:31:57,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 211 transitions, 2925 flow [2024-06-03 19:31:57,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:57,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:57,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:31:57,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 19:31:57,159 INFO L175 Difference]: Start difference. First operand has 123 places, 157 transitions, 1789 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:31:57,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 211 transitions, 2925 flow [2024-06-03 19:31:57,218 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 211 transitions, 2793 flow, removed 37 selfloop flow, removed 5 redundant places. [2024-06-03 19:31:57,221 INFO L231 Difference]: Finished difference. Result has 127 places, 174 transitions, 2245 flow [2024-06-03 19:31:57,221 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=1657, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2245, PETRI_PLACES=127, PETRI_TRANSITIONS=174} [2024-06-03 19:31:57,221 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 84 predicate places. [2024-06-03 19:31:57,222 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 174 transitions, 2245 flow [2024-06-03 19:31:57,222 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) [2024-06-03 19:31:57,222 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:57,222 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:57,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 19:31:57,222 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)] === [2024-06-03 19:31:57,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:57,223 INFO L85 PathProgramCache]: Analyzing trace with hash -1522643882, now seen corresponding path program 5 times [2024-06-03 19:31:57,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:57,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400444124] [2024-06-03 19:31:57,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:57,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:57,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:57,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:57,940 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:57,940 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400444124] [2024-06-03 19:31:57,940 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400444124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:57,940 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:57,940 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:57,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610181201] [2024-06-03 19:31:57,941 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:57,941 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:57,941 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:57,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:57,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:57,992 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:57,992 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 174 transitions, 2245 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) [2024-06-03 19:31:57,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:57,993 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:57,993 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:31:58,613 INFO L124 PetriNetUnfolderBase]: 2620/3848 cut-off events. [2024-06-03 19:31:58,614 INFO L125 PetriNetUnfolderBase]: For 122175/122189 co-relation queries the response was YES. [2024-06-03 19:31:58,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29103 conditions, 3848 events. 2620/3848 cut-off events. For 122175/122189 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 18060 event pairs, 642 based on Foata normal form. 14/3861 useless extension candidates. Maximal degree in co-relation 29044. Up to 2820 conditions per place. [2024-06-03 19:31:58,640 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 129 selfloop transitions, 93 changer transitions 0/225 dead transitions. [2024-06-03 19:31:58,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 225 transitions, 3420 flow [2024-06-03 19:31:58,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:31:58,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:31:58,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 153 transitions. [2024-06-03 19:31:58,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.45535714285714285 [2024-06-03 19:31:58,642 INFO L175 Difference]: Start difference. First operand has 127 places, 174 transitions, 2245 flow. Second operand 8 states and 153 transitions. [2024-06-03 19:31:58,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 225 transitions, 3420 flow [2024-06-03 19:31:58,731 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 225 transitions, 3279 flow, removed 62 selfloop flow, removed 2 redundant places. [2024-06-03 19:31:58,734 INFO L231 Difference]: Finished difference. Result has 136 places, 189 transitions, 2663 flow [2024-06-03 19:31:58,734 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2112, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=92, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2663, PETRI_PLACES=136, PETRI_TRANSITIONS=189} [2024-06-03 19:31:58,734 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 93 predicate places. [2024-06-03 19:31:58,734 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 189 transitions, 2663 flow [2024-06-03 19:31:58,734 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) [2024-06-03 19:31:58,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:31:58,735 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:31:58,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 19:31:58,735 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)] === [2024-06-03 19:31:58,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:31:58,735 INFO L85 PathProgramCache]: Analyzing trace with hash 132673145, now seen corresponding path program 3 times [2024-06-03 19:31:58,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:31:58,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815805008] [2024-06-03 19:31:58,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:31:58,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:31:58,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:31:59,709 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:31:59,709 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:31:59,709 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815805008] [2024-06-03 19:31:59,709 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815805008] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:31:59,709 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:31:59,709 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:31:59,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587228473] [2024-06-03 19:31:59,710 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:31:59,710 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:31:59,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:31:59,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:31:59,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:31:59,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:31:59,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 189 transitions, 2663 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) [2024-06-03 19:31:59,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:31:59,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:31:59,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:00,455 INFO L124 PetriNetUnfolderBase]: 2614/3838 cut-off events. [2024-06-03 19:32:00,456 INFO L125 PetriNetUnfolderBase]: For 124632/124646 co-relation queries the response was YES. [2024-06-03 19:32:00,470 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30037 conditions, 3838 events. 2614/3838 cut-off events. For 124632/124646 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 17959 event pairs, 693 based on Foata normal form. 17/3854 useless extension candidates. Maximal degree in co-relation 29973. Up to 3670 conditions per place. [2024-06-03 19:32:00,485 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 171 selfloop transitions, 41 changer transitions 0/215 dead transitions. [2024-06-03 19:32:00,485 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 215 transitions, 3301 flow [2024-06-03 19:32:00,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:00,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:00,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 137 transitions. [2024-06-03 19:32:00,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40773809523809523 [2024-06-03 19:32:00,487 INFO L175 Difference]: Start difference. First operand has 136 places, 189 transitions, 2663 flow. Second operand 8 states and 137 transitions. [2024-06-03 19:32:00,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 215 transitions, 3301 flow [2024-06-03 19:32:00,604 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 215 transitions, 2981 flow, removed 98 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:00,606 INFO L231 Difference]: Finished difference. Result has 139 places, 189 transitions, 2434 flow [2024-06-03 19:32:00,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2434, PETRI_PLACES=139, PETRI_TRANSITIONS=189} [2024-06-03 19:32:00,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 96 predicate places. [2024-06-03 19:32:00,607 INFO L495 AbstractCegarLoop]: Abstraction has has 139 places, 189 transitions, 2434 flow [2024-06-03 19:32:00,607 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) [2024-06-03 19:32:00,607 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:00,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:00,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 19:32:00,608 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)] === [2024-06-03 19:32:00,608 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:00,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1371838948, now seen corresponding path program 6 times [2024-06-03 19:32:00,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:00,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [709788547] [2024-06-03 19:32:00,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:00,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:00,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:01,285 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:01,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:01,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [709788547] [2024-06-03 19:32:01,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [709788547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:01,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:01,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:01,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272470856] [2024-06-03 19:32:01,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:01,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:01,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:01,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:01,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:01,363 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:01,363 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 189 transitions, 2434 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) [2024-06-03 19:32:01,363 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:01,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:01,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:01,969 INFO L124 PetriNetUnfolderBase]: 2590/3808 cut-off events. [2024-06-03 19:32:01,969 INFO L125 PetriNetUnfolderBase]: For 129091/129105 co-relation queries the response was YES. [2024-06-03 19:32:01,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28515 conditions, 3808 events. 2590/3808 cut-off events. For 129091/129105 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17835 event pairs, 644 based on Foata normal form. 20/3827 useless extension candidates. Maximal degree in co-relation 28452. Up to 2810 conditions per place. [2024-06-03 19:32:01,999 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 131 selfloop transitions, 92 changer transitions 0/226 dead transitions. [2024-06-03 19:32:02,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 226 transitions, 3399 flow [2024-06-03 19:32:02,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:02,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:02,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 154 transitions. [2024-06-03 19:32:02,001 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2024-06-03 19:32:02,001 INFO L175 Difference]: Start difference. First operand has 139 places, 189 transitions, 2434 flow. Second operand 8 states and 154 transitions. [2024-06-03 19:32:02,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 226 transitions, 3399 flow [2024-06-03 19:32:02,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 226 transitions, 3299 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:02,090 INFO L231 Difference]: Finished difference. Result has 140 places, 191 transitions, 2586 flow [2024-06-03 19:32:02,091 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2334, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=90, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2586, PETRI_PLACES=140, PETRI_TRANSITIONS=191} [2024-06-03 19:32:02,091 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-03 19:32:02,091 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 191 transitions, 2586 flow [2024-06-03 19:32:02,091 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) [2024-06-03 19:32:02,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:02,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:02,092 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 19:32:02,092 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:02,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:02,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1594733979, now seen corresponding path program 1 times [2024-06-03 19:32:02,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:02,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202805763] [2024-06-03 19:32:02,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:02,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:02,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:02,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:02,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:02,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202805763] [2024-06-03 19:32:02,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [202805763] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:02,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:02,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:02,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854708780] [2024-06-03 19:32:02,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:02,815 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:02,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:02,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:02,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:02,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:02,871 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 191 transitions, 2586 flow. Second operand has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:02,871 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:02,871 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:02,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:03,474 INFO L124 PetriNetUnfolderBase]: 2332/3539 cut-off events. [2024-06-03 19:32:03,474 INFO L125 PetriNetUnfolderBase]: For 115767/115767 co-relation queries the response was YES. [2024-06-03 19:32:03,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26847 conditions, 3539 events. 2332/3539 cut-off events. For 115767/115767 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 17137 event pairs, 588 based on Foata normal form. 2/3540 useless extension candidates. Maximal degree in co-relation 26783. Up to 3414 conditions per place. [2024-06-03 19:32:03,501 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 189 selfloop transitions, 11 changer transitions 0/204 dead transitions. [2024-06-03 19:32:03,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 204 transitions, 3038 flow [2024-06-03 19:32:03,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:03,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:03,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2024-06-03 19:32:03,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:32:03,502 INFO L175 Difference]: Start difference. First operand has 140 places, 191 transitions, 2586 flow. Second operand 6 states and 96 transitions. [2024-06-03 19:32:03,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 204 transitions, 3038 flow [2024-06-03 19:32:03,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 204 transitions, 2759 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:03,602 INFO L231 Difference]: Finished difference. Result has 140 places, 194 transitions, 2369 flow [2024-06-03 19:32:03,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2369, PETRI_PLACES=140, PETRI_TRANSITIONS=194} [2024-06-03 19:32:03,603 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 97 predicate places. [2024-06-03 19:32:03,603 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 194 transitions, 2369 flow [2024-06-03 19:32:03,603 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 9.75) internal successors, (78), 8 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:03,603 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:03,603 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:03,603 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 19:32:03,603 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)] === [2024-06-03 19:32:03,603 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:03,603 INFO L85 PathProgramCache]: Analyzing trace with hash 1933026383, now seen corresponding path program 1 times [2024-06-03 19:32:03,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:03,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743443713] [2024-06-03 19:32:03,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:03,604 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:03,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:04,615 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:04,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:04,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743443713] [2024-06-03 19:32:04,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743443713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:04,616 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:04,616 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:04,616 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544942885] [2024-06-03 19:32:04,616 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:04,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:04,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:04,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:04,618 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:04,753 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:04,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 194 transitions, 2369 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) [2024-06-03 19:32:04,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:04,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:04,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:05,498 INFO L124 PetriNetUnfolderBase]: 2484/3704 cut-off events. [2024-06-03 19:32:05,498 INFO L125 PetriNetUnfolderBase]: For 137180/137186 co-relation queries the response was YES. [2024-06-03 19:32:05,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28101 conditions, 3704 events. 2484/3704 cut-off events. For 137180/137186 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 17779 event pairs, 477 based on Foata normal form. 10/3713 useless extension candidates. Maximal degree in co-relation 28037. Up to 3347 conditions per place. [2024-06-03 19:32:05,528 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 175 selfloop transitions, 17 changer transitions 0/227 dead transitions. [2024-06-03 19:32:05,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 227 transitions, 2893 flow [2024-06-03 19:32:05,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:05,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:05,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:32:05,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:32:05,529 INFO L175 Difference]: Start difference. First operand has 140 places, 194 transitions, 2369 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:32:05,529 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 227 transitions, 2893 flow [2024-06-03 19:32:05,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 227 transitions, 2849 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:05,627 INFO L231 Difference]: Finished difference. Result has 144 places, 196 transitions, 2432 flow [2024-06-03 19:32:05,627 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2325, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=194, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=177, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2432, PETRI_PLACES=144, PETRI_TRANSITIONS=196} [2024-06-03 19:32:05,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 101 predicate places. [2024-06-03 19:32:05,628 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 196 transitions, 2432 flow [2024-06-03 19:32:05,628 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) [2024-06-03 19:32:05,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:05,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:05,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 19:32:05,628 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)] === [2024-06-03 19:32:05,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:05,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1933086833, now seen corresponding path program 2 times [2024-06-03 19:32:05,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:05,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098303219] [2024-06-03 19:32:05,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:05,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:05,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:06,720 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:06,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:06,721 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098303219] [2024-06-03 19:32:06,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098303219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:06,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:06,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:06,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829987035] [2024-06-03 19:32:06,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:06,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:06,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:06,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:06,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:06,816 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:06,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 196 transitions, 2432 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) [2024-06-03 19:32:06,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:06,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:06,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:07,623 INFO L124 PetriNetUnfolderBase]: 2501/3731 cut-off events. [2024-06-03 19:32:07,624 INFO L125 PetriNetUnfolderBase]: For 147129/147135 co-relation queries the response was YES. [2024-06-03 19:32:07,639 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28749 conditions, 3731 events. 2501/3731 cut-off events. For 147129/147135 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 17949 event pairs, 586 based on Foata normal form. 10/3740 useless extension candidates. Maximal degree in co-relation 28684. Up to 3377 conditions per place. [2024-06-03 19:32:07,654 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 173 selfloop transitions, 21 changer transitions 0/229 dead transitions. [2024-06-03 19:32:07,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 229 transitions, 2966 flow [2024-06-03 19:32:07,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:07,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:07,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:32:07,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:32:07,667 INFO L175 Difference]: Start difference. First operand has 144 places, 196 transitions, 2432 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:32:07,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 229 transitions, 2966 flow [2024-06-03 19:32:07,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 145 places, 229 transitions, 2877 flow, removed 29 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:07,789 INFO L231 Difference]: Finished difference. Result has 146 places, 198 transitions, 2463 flow [2024-06-03 19:32:07,789 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2343, PETRI_DIFFERENCE_MINUEND_PLACES=138, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=196, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2463, PETRI_PLACES=146, PETRI_TRANSITIONS=198} [2024-06-03 19:32:07,789 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 103 predicate places. [2024-06-03 19:32:07,789 INFO L495 AbstractCegarLoop]: Abstraction has has 146 places, 198 transitions, 2463 flow [2024-06-03 19:32:07,789 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) [2024-06-03 19:32:07,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:07,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:07,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 19:32:07,790 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)] === [2024-06-03 19:32:07,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:07,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1933086957, now seen corresponding path program 1 times [2024-06-03 19:32:07,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:07,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341523894] [2024-06-03 19:32:07,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:07,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:07,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:08,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:08,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:08,804 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341523894] [2024-06-03 19:32:08,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341523894] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:08,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:08,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:08,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612876091] [2024-06-03 19:32:08,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:08,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:08,805 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:08,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:08,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:08,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:08,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 146 places, 198 transitions, 2463 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) [2024-06-03 19:32:08,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:08,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:08,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:09,674 INFO L124 PetriNetUnfolderBase]: 2609/3838 cut-off events. [2024-06-03 19:32:09,674 INFO L125 PetriNetUnfolderBase]: For 155410/155410 co-relation queries the response was YES. [2024-06-03 19:32:09,690 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29579 conditions, 3838 events. 2609/3838 cut-off events. For 155410/155410 co-relation queries the response was YES. Maximal size of possible extension queue 171. Compared 18010 event pairs, 596 based on Foata normal form. 3/3840 useless extension candidates. Maximal degree in co-relation 29513. Up to 3647 conditions per place. [2024-06-03 19:32:09,706 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 196 selfloop transitions, 40 changer transitions 0/239 dead transitions. [2024-06-03 19:32:09,706 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 239 transitions, 3364 flow [2024-06-03 19:32:09,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:09,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:09,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 143 transitions. [2024-06-03 19:32:09,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4255952380952381 [2024-06-03 19:32:09,707 INFO L175 Difference]: Start difference. First operand has 146 places, 198 transitions, 2463 flow. Second operand 8 states and 143 transitions. [2024-06-03 19:32:09,707 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 239 transitions, 3364 flow [2024-06-03 19:32:09,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 147 places, 239 transitions, 3264 flow, removed 31 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:09,851 INFO L231 Difference]: Finished difference. Result has 149 places, 205 transitions, 2650 flow [2024-06-03 19:32:09,851 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2363, PETRI_DIFFERENCE_MINUEND_PLACES=140, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=198, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=159, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2650, PETRI_PLACES=149, PETRI_TRANSITIONS=205} [2024-06-03 19:32:09,852 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 106 predicate places. [2024-06-03 19:32:09,852 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 205 transitions, 2650 flow [2024-06-03 19:32:09,852 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) [2024-06-03 19:32:09,852 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:09,852 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:09,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 19:32:09,853 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)] === [2024-06-03 19:32:09,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:09,854 INFO L85 PathProgramCache]: Analyzing trace with hash 1502690957, now seen corresponding path program 1 times [2024-06-03 19:32:09,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:09,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769610761] [2024-06-03 19:32:09,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:09,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:09,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:10,704 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:10,704 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:10,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769610761] [2024-06-03 19:32:10,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769610761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:10,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:10,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:10,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977047025] [2024-06-03 19:32:10,705 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:10,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:10,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:10,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:10,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:10,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:10,744 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 205 transitions, 2650 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:10,744 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:10,744 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:10,744 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:11,467 INFO L124 PetriNetUnfolderBase]: 2597/3822 cut-off events. [2024-06-03 19:32:11,467 INFO L125 PetriNetUnfolderBase]: For 162413/162413 co-relation queries the response was YES. [2024-06-03 19:32:11,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29757 conditions, 3822 events. 2597/3822 cut-off events. For 162413/162413 co-relation queries the response was YES. Maximal size of possible extension queue 169. Compared 17953 event pairs, 570 based on Foata normal form. 6/3827 useless extension candidates. Maximal degree in co-relation 29689. Up to 3401 conditions per place. [2024-06-03 19:32:11,497 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 171 selfloop transitions, 67 changer transitions 0/241 dead transitions. [2024-06-03 19:32:11,497 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 156 places, 241 transitions, 3393 flow [2024-06-03 19:32:11,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:11,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 144 transitions. [2024-06-03 19:32:11,498 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42857142857142855 [2024-06-03 19:32:11,498 INFO L175 Difference]: Start difference. First operand has 149 places, 205 transitions, 2650 flow. Second operand 8 states and 144 transitions. [2024-06-03 19:32:11,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 156 places, 241 transitions, 3393 flow [2024-06-03 19:32:11,658 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 151 places, 241 transitions, 3238 flow, removed 62 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:11,661 INFO L231 Difference]: Finished difference. Result has 154 places, 210 transitions, 2777 flow [2024-06-03 19:32:11,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2495, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=138, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2777, PETRI_PLACES=154, PETRI_TRANSITIONS=210} [2024-06-03 19:32:11,662 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 111 predicate places. [2024-06-03 19:32:11,662 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 210 transitions, 2777 flow [2024-06-03 19:32:11,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:11,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:11,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:11,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 19:32:11,663 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)] === [2024-06-03 19:32:11,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:11,663 INFO L85 PathProgramCache]: Analyzing trace with hash 1618161865, now seen corresponding path program 1 times [2024-06-03 19:32:11,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:11,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851282991] [2024-06-03 19:32:11,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:11,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:11,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:12,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:12,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:12,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851282991] [2024-06-03 19:32:12,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851282991] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:12,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:12,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:12,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [865298738] [2024-06-03 19:32:12,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:12,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:12,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:12,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:12,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:12,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:12,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 210 transitions, 2777 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) [2024-06-03 19:32:12,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:12,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:12,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:13,551 INFO L124 PetriNetUnfolderBase]: 2749/4070 cut-off events. [2024-06-03 19:32:13,551 INFO L125 PetriNetUnfolderBase]: For 194826/194826 co-relation queries the response was YES. [2024-06-03 19:32:13,570 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32015 conditions, 4070 events. 2749/4070 cut-off events. For 194826/194826 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19579 event pairs, 583 based on Foata normal form. 36/4105 useless extension candidates. Maximal degree in co-relation 31945. Up to 3445 conditions per place. [2024-06-03 19:32:13,586 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 180 selfloop transitions, 70 changer transitions 0/253 dead transitions. [2024-06-03 19:32:13,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 162 places, 253 transitions, 3605 flow [2024-06-03 19:32:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:13,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:13,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 163 transitions. [2024-06-03 19:32:13,588 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4312169312169312 [2024-06-03 19:32:13,588 INFO L175 Difference]: Start difference. First operand has 154 places, 210 transitions, 2777 flow. Second operand 9 states and 163 transitions. [2024-06-03 19:32:13,588 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 162 places, 253 transitions, 3605 flow [2024-06-03 19:32:13,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 253 transitions, 3485 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:13,766 INFO L231 Difference]: Finished difference. Result has 158 places, 213 transitions, 2895 flow [2024-06-03 19:32:13,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2661, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=210, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2895, PETRI_PLACES=158, PETRI_TRANSITIONS=213} [2024-06-03 19:32:13,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 115 predicate places. [2024-06-03 19:32:13,767 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 213 transitions, 2895 flow [2024-06-03 19:32:13,767 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) [2024-06-03 19:32:13,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:13,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:13,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 19:32:13,767 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)] === [2024-06-03 19:32:13,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:13,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1617977167, now seen corresponding path program 3 times [2024-06-03 19:32:13,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:13,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135204934] [2024-06-03 19:32:13,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:13,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:13,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:14,706 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:14,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:14,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135204934] [2024-06-03 19:32:14,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135204934] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:14,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:14,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:14,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846796887] [2024-06-03 19:32:14,707 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:14,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:14,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:14,709 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:14,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:14,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:14,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 213 transitions, 2895 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) [2024-06-03 19:32:14,789 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:14,789 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:14,789 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:15,566 INFO L124 PetriNetUnfolderBase]: 2634/3964 cut-off events. [2024-06-03 19:32:15,567 INFO L125 PetriNetUnfolderBase]: For 181519/181525 co-relation queries the response was YES. [2024-06-03 19:32:15,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31758 conditions, 3964 events. 2634/3964 cut-off events. For 181519/181525 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19675 event pairs, 569 based on Foata normal form. 10/3973 useless extension candidates. Maximal degree in co-relation 31687. Up to 3570 conditions per place. [2024-06-03 19:32:15,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 26 changer transitions 0/244 dead transitions. [2024-06-03 19:32:15,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 244 transitions, 3451 flow [2024-06-03 19:32:15,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:15,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:15,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 140 transitions. [2024-06-03 19:32:15,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:32:15,598 INFO L175 Difference]: Start difference. First operand has 158 places, 213 transitions, 2895 flow. Second operand 8 states and 140 transitions. [2024-06-03 19:32:15,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 244 transitions, 3451 flow [2024-06-03 19:32:15,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 244 transitions, 3269 flow, removed 24 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:15,766 INFO L231 Difference]: Finished difference. Result has 159 places, 215 transitions, 2848 flow [2024-06-03 19:32:15,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2713, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2848, PETRI_PLACES=159, PETRI_TRANSITIONS=215} [2024-06-03 19:32:15,767 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-03 19:32:15,767 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 215 transitions, 2848 flow [2024-06-03 19:32:15,767 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) [2024-06-03 19:32:15,767 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:15,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:15,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 19:32:15,767 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:15,768 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:15,768 INFO L85 PathProgramCache]: Analyzing trace with hash 1175340984, now seen corresponding path program 1 times [2024-06-03 19:32:15,768 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:15,768 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356660642] [2024-06-03 19:32:15,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:15,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:15,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:16,464 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:16,464 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:16,464 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356660642] [2024-06-03 19:32:16,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356660642] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:16,464 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:16,464 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:16,464 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725302901] [2024-06-03 19:32:16,464 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:16,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:16,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:16,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:16,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:16,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:16,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 215 transitions, 2848 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:16,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:16,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:16,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:17,311 INFO L124 PetriNetUnfolderBase]: 2771/4104 cut-off events. [2024-06-03 19:32:17,312 INFO L125 PetriNetUnfolderBase]: For 186998/186998 co-relation queries the response was YES. [2024-06-03 19:32:17,327 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32308 conditions, 4104 events. 2771/4104 cut-off events. For 186998/186998 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 19806 event pairs, 632 based on Foata normal form. 1/4104 useless extension candidates. Maximal degree in co-relation 32236. Up to 4066 conditions per place. [2024-06-03 19:32:17,341 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 215 selfloop transitions, 16 changer transitions 0/234 dead transitions. [2024-06-03 19:32:17,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 164 places, 234 transitions, 3468 flow [2024-06-03 19:32:17,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:17,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:17,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 99 transitions. [2024-06-03 19:32:17,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:32:17,343 INFO L175 Difference]: Start difference. First operand has 159 places, 215 transitions, 2848 flow. Second operand 6 states and 99 transitions. [2024-06-03 19:32:17,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 164 places, 234 transitions, 3468 flow [2024-06-03 19:32:17,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 234 transitions, 3351 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:17,493 INFO L231 Difference]: Finished difference. Result has 159 places, 218 transitions, 2821 flow [2024-06-03 19:32:17,493 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2821, PETRI_PLACES=159, PETRI_TRANSITIONS=218} [2024-06-03 19:32:17,493 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 116 predicate places. [2024-06-03 19:32:17,494 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 218 transitions, 2821 flow [2024-06-03 19:32:17,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:17,494 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:17,494 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:17,494 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 19:32:17,494 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)] === [2024-06-03 19:32:17,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:17,495 INFO L85 PathProgramCache]: Analyzing trace with hash 42853987, now seen corresponding path program 2 times [2024-06-03 19:32:17,495 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:17,495 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992922549] [2024-06-03 19:32:17,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:17,495 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:17,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:18,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:18,343 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:18,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992922549] [2024-06-03 19:32:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992922549] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:18,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:18,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1826652827] [2024-06-03 19:32:18,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:18,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:18,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:18,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:18,383 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:18,383 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 218 transitions, 2821 flow. Second operand has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:18,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:18,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:18,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:19,110 INFO L124 PetriNetUnfolderBase]: 2759/4092 cut-off events. [2024-06-03 19:32:19,110 INFO L125 PetriNetUnfolderBase]: For 193820/193834 co-relation queries the response was YES. [2024-06-03 19:32:19,127 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32006 conditions, 4092 events. 2759/4092 cut-off events. For 193820/193834 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 19831 event pairs, 568 based on Foata normal form. 14/4105 useless extension candidates. Maximal degree in co-relation 31933. Up to 3463 conditions per place. [2024-06-03 19:32:19,140 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 166 selfloop transitions, 87 changer transitions 0/256 dead transitions. [2024-06-03 19:32:19,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 256 transitions, 3680 flow [2024-06-03 19:32:19,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:19,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 147 transitions. [2024-06-03 19:32:19,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-06-03 19:32:19,142 INFO L175 Difference]: Start difference. First operand has 159 places, 218 transitions, 2821 flow. Second operand 8 states and 147 transitions. [2024-06-03 19:32:19,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 256 transitions, 3680 flow [2024-06-03 19:32:19,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 256 transitions, 3590 flow, removed 30 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:19,331 INFO L231 Difference]: Finished difference. Result has 165 places, 225 transitions, 3033 flow [2024-06-03 19:32:19,331 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2731, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=80, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3033, PETRI_PLACES=165, PETRI_TRANSITIONS=225} [2024-06-03 19:32:19,331 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 122 predicate places. [2024-06-03 19:32:19,331 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 225 transitions, 3033 flow [2024-06-03 19:32:19,331 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 8.555555555555555) internal successors, (77), 9 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:19,332 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:19,332 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:19,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 19:32:19,332 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)] === [2024-06-03 19:32:19,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:19,332 INFO L85 PathProgramCache]: Analyzing trace with hash 42860745, now seen corresponding path program 2 times [2024-06-03 19:32:19,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:19,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458097864] [2024-06-03 19:32:19,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:19,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:19,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:20,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:20,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:20,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458097864] [2024-06-03 19:32:20,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458097864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:20,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:20,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:20,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837263998] [2024-06-03 19:32:20,273 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:20,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:20,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:20,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:20,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:20,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:20,365 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 225 transitions, 3033 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) [2024-06-03 19:32:20,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:20,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:20,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:21,257 INFO L124 PetriNetUnfolderBase]: 2911/4340 cut-off events. [2024-06-03 19:32:21,258 INFO L125 PetriNetUnfolderBase]: For 229709/229723 co-relation queries the response was YES. [2024-06-03 19:32:21,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34593 conditions, 4340 events. 2911/4340 cut-off events. For 229709/229723 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 21494 event pairs, 584 based on Foata normal form. 44/4383 useless extension candidates. Maximal degree in co-relation 34517. Up to 3507 conditions per place. [2024-06-03 19:32:21,296 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 175 selfloop transitions, 90 changer transitions 0/268 dead transitions. [2024-06-03 19:32:21,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 268 transitions, 3985 flow [2024-06-03 19:32:21,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:21,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:21,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:32:21,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 19:32:21,298 INFO L175 Difference]: Start difference. First operand has 165 places, 225 transitions, 3033 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:32:21,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 268 transitions, 3985 flow [2024-06-03 19:32:21,493 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 167 places, 268 transitions, 3818 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:21,497 INFO L231 Difference]: Finished difference. Result has 168 places, 228 transitions, 3154 flow [2024-06-03 19:32:21,497 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2872, PETRI_DIFFERENCE_MINUEND_PLACES=159, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3154, PETRI_PLACES=168, PETRI_TRANSITIONS=228} [2024-06-03 19:32:21,497 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 125 predicate places. [2024-06-03 19:32:21,497 INFO L495 AbstractCegarLoop]: Abstraction has has 168 places, 228 transitions, 3154 flow [2024-06-03 19:32:21,497 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) [2024-06-03 19:32:21,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:21,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:21,498 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 19:32:21,498 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)] === [2024-06-03 19:32:21,498 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:21,498 INFO L85 PathProgramCache]: Analyzing trace with hash 42676047, now seen corresponding path program 4 times [2024-06-03 19:32:21,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:21,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135694298] [2024-06-03 19:32:21,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:21,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:22,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:22,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135694298] [2024-06-03 19:32:22,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135694298] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:22,599 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:22,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:22,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110438877] [2024-06-03 19:32:22,599 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:22,600 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:22,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:22,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:22,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:22,685 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:22,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 228 transitions, 3154 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) [2024-06-03 19:32:22,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:22,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:22,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:23,386 INFO L124 PetriNetUnfolderBase]: 2753/4177 cut-off events. [2024-06-03 19:32:23,387 INFO L125 PetriNetUnfolderBase]: For 210740/210760 co-relation queries the response was YES. [2024-06-03 19:32:23,407 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33618 conditions, 4177 events. 2753/4177 cut-off events. For 210740/210760 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 21281 event pairs, 572 based on Foata normal form. 18/4194 useless extension candidates. Maximal degree in co-relation 33542. Up to 3723 conditions per place. [2024-06-03 19:32:23,424 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 178 selfloop transitions, 33 changer transitions 0/256 dead transitions. [2024-06-03 19:32:23,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 256 transitions, 3722 flow [2024-06-03 19:32:23,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:32:23,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:32:23,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:32:23,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:32:23,426 INFO L175 Difference]: Start difference. First operand has 168 places, 228 transitions, 3154 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:32:23,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 256 transitions, 3722 flow [2024-06-03 19:32:23,624 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 256 transitions, 3513 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:23,627 INFO L231 Difference]: Finished difference. Result has 170 places, 230 transitions, 3100 flow [2024-06-03 19:32:23,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2945, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=195, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3100, PETRI_PLACES=170, PETRI_TRANSITIONS=230} [2024-06-03 19:32:23,628 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 127 predicate places. [2024-06-03 19:32:23,628 INFO L495 AbstractCegarLoop]: Abstraction has has 170 places, 230 transitions, 3100 flow [2024-06-03 19:32:23,628 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) [2024-06-03 19:32:23,628 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:23,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:23,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 19:32:23,629 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)] === [2024-06-03 19:32:23,629 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:23,629 INFO L85 PathProgramCache]: Analyzing trace with hash 270761895, now seen corresponding path program 3 times [2024-06-03 19:32:23,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:23,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939795708] [2024-06-03 19:32:23,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:23,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:23,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:24,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:24,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:24,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939795708] [2024-06-03 19:32:24,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939795708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:24,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:24,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:24,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [423222598] [2024-06-03 19:32:24,494 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:24,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:24,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:24,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:24,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:24,562 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:24,562 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 170 places, 230 transitions, 3100 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) [2024-06-03 19:32:24,563 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:24,563 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:24,563 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:25,416 INFO L124 PetriNetUnfolderBase]: 3061/4586 cut-off events. [2024-06-03 19:32:25,416 INFO L125 PetriNetUnfolderBase]: For 242969/242983 co-relation queries the response was YES. [2024-06-03 19:32:25,439 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35680 conditions, 4586 events. 3061/4586 cut-off events. For 242969/242983 co-relation queries the response was YES. Maximal size of possible extension queue 205. Compared 23120 event pairs, 585 based on Foata normal form. 50/4635 useless extension candidates. Maximal degree in co-relation 35603. Up to 3769 conditions per place. [2024-06-03 19:32:25,458 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 167 selfloop transitions, 106 changer transitions 0/276 dead transitions. [2024-06-03 19:32:25,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 276 transitions, 4048 flow [2024-06-03 19:32:25,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:25,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 167 transitions. [2024-06-03 19:32:25,461 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4417989417989418 [2024-06-03 19:32:25,462 INFO L175 Difference]: Start difference. First operand has 170 places, 230 transitions, 3100 flow. Second operand 9 states and 167 transitions. [2024-06-03 19:32:25,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 276 transitions, 4048 flow [2024-06-03 19:32:25,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 276 transitions, 3867 flow, removed 59 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:25,686 INFO L231 Difference]: Finished difference. Result has 175 places, 238 transitions, 3319 flow [2024-06-03 19:32:25,686 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=2919, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=124, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3319, PETRI_PLACES=175, PETRI_TRANSITIONS=238} [2024-06-03 19:32:25,687 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 132 predicate places. [2024-06-03 19:32:25,687 INFO L495 AbstractCegarLoop]: Abstraction has has 175 places, 238 transitions, 3319 flow [2024-06-03 19:32:25,687 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) [2024-06-03 19:32:25,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:25,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:25,687 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 19:32:25,687 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)] === [2024-06-03 19:32:25,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:25,688 INFO L85 PathProgramCache]: Analyzing trace with hash 279332775, now seen corresponding path program 4 times [2024-06-03 19:32:25,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:25,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662435088] [2024-06-03 19:32:25,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:25,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:25,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:26,717 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:26,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:26,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662435088] [2024-06-03 19:32:26,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662435088] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:26,718 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:26,718 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:26,718 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1324664719] [2024-06-03 19:32:26,718 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:26,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:26,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:26,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:26,718 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:26,800 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:26,800 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 238 transitions, 3319 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) [2024-06-03 19:32:26,800 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:26,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:26,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:27,740 INFO L124 PetriNetUnfolderBase]: 3102/4647 cut-off events. [2024-06-03 19:32:27,741 INFO L125 PetriNetUnfolderBase]: For 244373/244387 co-relation queries the response was YES. [2024-06-03 19:32:27,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37474 conditions, 4647 events. 3102/4647 cut-off events. For 244373/244387 co-relation queries the response was YES. Maximal size of possible extension queue 210. Compared 23558 event pairs, 628 based on Foata normal form. 20/4666 useless extension candidates. Maximal degree in co-relation 37394. Up to 4252 conditions per place. [2024-06-03 19:32:27,777 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 199 selfloop transitions, 81 changer transitions 0/283 dead transitions. [2024-06-03 19:32:27,777 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 283 transitions, 4597 flow [2024-06-03 19:32:27,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:27,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:27,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 155 transitions. [2024-06-03 19:32:27,778 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41005291005291006 [2024-06-03 19:32:27,778 INFO L175 Difference]: Start difference. First operand has 175 places, 238 transitions, 3319 flow. Second operand 9 states and 155 transitions. [2024-06-03 19:32:27,778 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 283 transitions, 4597 flow [2024-06-03 19:32:28,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 283 transitions, 4329 flow, removed 58 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:28,031 INFO L231 Difference]: Finished difference. Result has 180 places, 250 transitions, 3599 flow [2024-06-03 19:32:28,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=238, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3599, PETRI_PLACES=180, PETRI_TRANSITIONS=250} [2024-06-03 19:32:28,032 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 137 predicate places. [2024-06-03 19:32:28,032 INFO L495 AbstractCegarLoop]: Abstraction has has 180 places, 250 transitions, 3599 flow [2024-06-03 19:32:28,032 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) [2024-06-03 19:32:28,032 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:28,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:28,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 19:32:28,033 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)] === [2024-06-03 19:32:28,033 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:28,033 INFO L85 PathProgramCache]: Analyzing trace with hash 54076683, now seen corresponding path program 5 times [2024-06-03 19:32:28,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:28,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068020649] [2024-06-03 19:32:28,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:28,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:28,962 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:28,962 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:28,962 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068020649] [2024-06-03 19:32:28,963 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068020649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:28,963 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:28,963 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:28,963 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966969438] [2024-06-03 19:32:28,963 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:28,963 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:28,963 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:28,964 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:28,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:29,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:29,064 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 180 places, 250 transitions, 3599 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) [2024-06-03 19:32:29,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:29,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:29,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:30,063 INFO L124 PetriNetUnfolderBase]: 3092/4635 cut-off events. [2024-06-03 19:32:30,063 INFO L125 PetriNetUnfolderBase]: For 245279/245293 co-relation queries the response was YES. [2024-06-03 19:32:30,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36964 conditions, 4635 events. 3092/4635 cut-off events. For 245279/245293 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23502 event pairs, 586 based on Foata normal form. 14/4648 useless extension candidates. Maximal degree in co-relation 36882. Up to 3820 conditions per place. [2024-06-03 19:32:30,104 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 151 selfloop transitions, 129 changer transitions 0/283 dead transitions. [2024-06-03 19:32:30,104 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 283 transitions, 4401 flow [2024-06-03 19:32:30,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:30,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:30,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:32:30,118 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 19:32:30,118 INFO L175 Difference]: Start difference. First operand has 180 places, 250 transitions, 3599 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:32:30,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 283 transitions, 4401 flow [2024-06-03 19:32:30,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 283 transitions, 4080 flow, removed 119 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:30,404 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3544 flow [2024-06-03 19:32:30,404 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3278, PETRI_DIFFERENCE_MINUEND_PLACES=175, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3544, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-03 19:32:30,405 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 19:32:30,405 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3544 flow [2024-06-03 19:32:30,405 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) [2024-06-03 19:32:30,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:30,405 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:30,405 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 19:32:30,406 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:30,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:30,406 INFO L85 PathProgramCache]: Analyzing trace with hash 2102842074, now seen corresponding path program 2 times [2024-06-03 19:32:30,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:30,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1478184172] [2024-06-03 19:32:30,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:30,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:30,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:31,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:31,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:31,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1478184172] [2024-06-03 19:32:31,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1478184172] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:31,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:31,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:32:31,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907594004] [2024-06-03 19:32:31,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:31,060 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:32:31,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:31,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:32:31,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:32:31,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:31,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3544 flow. Second operand has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:31,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:31,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:31,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:31,963 INFO L124 PetriNetUnfolderBase]: 3089/4629 cut-off events. [2024-06-03 19:32:31,963 INFO L125 PetriNetUnfolderBase]: For 246857/246871 co-relation queries the response was YES. [2024-06-03 19:32:31,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37093 conditions, 4629 events. 3089/4629 cut-off events. For 246857/246871 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 23450 event pairs, 696 based on Foata normal form. 15/4643 useless extension candidates. Maximal degree in co-relation 37009. Up to 4590 conditions per place. [2024-06-03 19:32:32,006 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 240 selfloop transitions, 16 changer transitions 0/259 dead transitions. [2024-06-03 19:32:32,006 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 259 transitions, 4078 flow [2024-06-03 19:32:32,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:32,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2024-06-03 19:32:32,007 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36507936507936506 [2024-06-03 19:32:32,007 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3544 flow. Second operand 6 states and 92 transitions. [2024-06-03 19:32:32,007 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 259 transitions, 4078 flow [2024-06-03 19:32:32,214 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 259 transitions, 3787 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:32,218 INFO L231 Difference]: Finished difference. Result has 184 places, 250 transitions, 3291 flow [2024-06-03 19:32:32,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3253, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=234, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3291, PETRI_PLACES=184, PETRI_TRANSITIONS=250} [2024-06-03 19:32:32,220 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 141 predicate places. [2024-06-03 19:32:32,220 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 250 transitions, 3291 flow [2024-06-03 19:32:32,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.75) internal successors, (70), 8 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:32,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:32,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:32,227 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 19:32:32,227 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:32,227 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:32,228 INFO L85 PathProgramCache]: Analyzing trace with hash 1181060856, now seen corresponding path program 1 times [2024-06-03 19:32:32,228 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:32,228 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685522372] [2024-06-03 19:32:32,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:32,228 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:32,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:32,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:32,976 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:32,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685522372] [2024-06-03 19:32:32,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685522372] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:32,978 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:32,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:32,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447695308] [2024-06-03 19:32:32,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:32,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:32,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:32,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:32,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:33,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:33,030 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 250 transitions, 3291 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:33,030 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:33,030 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:33,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:33,755 INFO L124 PetriNetUnfolderBase]: 2842/4376 cut-off events. [2024-06-03 19:32:33,756 INFO L125 PetriNetUnfolderBase]: For 217618/217618 co-relation queries the response was YES. [2024-06-03 19:32:33,777 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33461 conditions, 4376 events. 2842/4376 cut-off events. For 217618/217618 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 22830 event pairs, 605 based on Foata normal form. 2/4377 useless extension candidates. Maximal degree in co-relation 33376. Up to 4224 conditions per place. [2024-06-03 19:32:33,792 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 243 selfloop transitions, 19 changer transitions 0/266 dead transitions. [2024-06-03 19:32:33,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 266 transitions, 3972 flow [2024-06-03 19:32:33,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:33,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 103 transitions. [2024-06-03 19:32:33,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4087301587301587 [2024-06-03 19:32:33,793 INFO L175 Difference]: Start difference. First operand has 184 places, 250 transitions, 3291 flow. Second operand 6 states and 103 transitions. [2024-06-03 19:32:33,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 266 transitions, 3972 flow [2024-06-03 19:32:33,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 266 transitions, 3932 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:33,989 INFO L231 Difference]: Finished difference. Result has 185 places, 253 transitions, 3342 flow [2024-06-03 19:32:33,989 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3251, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3342, PETRI_PLACES=185, PETRI_TRANSITIONS=253} [2024-06-03 19:32:33,989 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 142 predicate places. [2024-06-03 19:32:33,990 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 253 transitions, 3342 flow [2024-06-03 19:32:33,990 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:33,990 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:33,990 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:33,990 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 19:32:33,990 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:33,991 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:33,991 INFO L85 PathProgramCache]: Analyzing trace with hash 2103597606, now seen corresponding path program 2 times [2024-06-03 19:32:33,991 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:33,991 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927314247] [2024-06-03 19:32:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:33,991 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:33,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:34,608 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:34,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:34,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927314247] [2024-06-03 19:32:34,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [927314247] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:34,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:34,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 19:32:34,609 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373384768] [2024-06-03 19:32:34,609 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:34,609 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 19:32:34,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:34,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 19:32:34,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 19:32:34,663 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:32:34,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 253 transitions, 3342 flow. Second operand has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:34,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:34,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:32:34,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:35,394 INFO L124 PetriNetUnfolderBase]: 2792/4296 cut-off events. [2024-06-03 19:32:35,394 INFO L125 PetriNetUnfolderBase]: For 223631/223631 co-relation queries the response was YES. [2024-06-03 19:32:35,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33176 conditions, 4296 events. 2792/4296 cut-off events. For 223631/223631 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 22333 event pairs, 598 based on Foata normal form. 1/4296 useless extension candidates. Maximal degree in co-relation 33090. Up to 4175 conditions per place. [2024-06-03 19:32:35,427 INFO L140 encePairwiseOnDemand]: 34/42 looper letters, 247 selfloop transitions, 11 changer transitions 0/262 dead transitions. [2024-06-03 19:32:35,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 262 transitions, 3880 flow [2024-06-03 19:32:35,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 19:32:35,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 19:32:35,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 95 transitions. [2024-06-03 19:32:35,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.376984126984127 [2024-06-03 19:32:35,428 INFO L175 Difference]: Start difference. First operand has 185 places, 253 transitions, 3342 flow. Second operand 6 states and 95 transitions. [2024-06-03 19:32:35,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 262 transitions, 3880 flow [2024-06-03 19:32:35,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 187 places, 262 transitions, 3851 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-06-03 19:32:35,628 INFO L231 Difference]: Finished difference. Result has 188 places, 253 transitions, 3341 flow [2024-06-03 19:32:35,628 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3313, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3341, PETRI_PLACES=188, PETRI_TRANSITIONS=253} [2024-06-03 19:32:35,629 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 145 predicate places. [2024-06-03 19:32:35,629 INFO L495 AbstractCegarLoop]: Abstraction has has 188 places, 253 transitions, 3341 flow [2024-06-03 19:32:35,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 10.0) internal successors, (70), 7 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:32:35,629 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:35,629 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:35,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 19:32:35,629 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:35,630 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:35,630 INFO L85 PathProgramCache]: Analyzing trace with hash -749939047, now seen corresponding path program 1 times [2024-06-03 19:32:35,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:35,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350768407] [2024-06-03 19:32:35,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:35,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:35,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:36,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:36,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:36,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350768407] [2024-06-03 19:32:36,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350768407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:36,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:36,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:36,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701392829] [2024-06-03 19:32:36,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:36,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:36,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:36,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:36,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:36,818 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:36,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 253 transitions, 3341 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) [2024-06-03 19:32:36,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:36,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:36,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:37,883 INFO L124 PetriNetUnfolderBase]: 3200/4797 cut-off events. [2024-06-03 19:32:37,884 INFO L125 PetriNetUnfolderBase]: For 284033/284037 co-relation queries the response was YES. [2024-06-03 19:32:37,907 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38532 conditions, 4797 events. 3200/4797 cut-off events. For 284033/284037 co-relation queries the response was YES. Maximal size of possible extension queue 215. Compared 24366 event pairs, 681 based on Foata normal form. 10/4806 useless extension candidates. Maximal degree in co-relation 38445. Up to 4545 conditions per place. [2024-06-03 19:32:37,924 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 275 selfloop transitions, 46 changer transitions 0/324 dead transitions. [2024-06-03 19:32:37,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 324 transitions, 4972 flow [2024-06-03 19:32:37,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:32:37,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:32:37,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 168 transitions. [2024-06-03 19:32:37,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4 [2024-06-03 19:32:37,926 INFO L175 Difference]: Start difference. First operand has 188 places, 253 transitions, 3341 flow. Second operand 10 states and 168 transitions. [2024-06-03 19:32:37,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 324 transitions, 4972 flow [2024-06-03 19:32:38,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 191 places, 324 transitions, 4923 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:38,206 INFO L231 Difference]: Finished difference. Result has 197 places, 279 transitions, 3942 flow [2024-06-03 19:32:38,207 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3294, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=253, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=3942, PETRI_PLACES=197, PETRI_TRANSITIONS=279} [2024-06-03 19:32:38,207 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 154 predicate places. [2024-06-03 19:32:38,207 INFO L495 AbstractCegarLoop]: Abstraction has has 197 places, 279 transitions, 3942 flow [2024-06-03 19:32:38,207 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) [2024-06-03 19:32:38,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:38,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:38,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 19:32:38,208 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)] === [2024-06-03 19:32:38,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:38,208 INFO L85 PathProgramCache]: Analyzing trace with hash 1491980091, now seen corresponding path program 2 times [2024-06-03 19:32:38,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:38,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043222619] [2024-06-03 19:32:38,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:38,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:38,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:39,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:39,166 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043222619] [2024-06-03 19:32:39,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2043222619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:39,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:39,166 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:39,166 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491228673] [2024-06-03 19:32:39,166 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:39,166 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:39,166 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:39,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:39,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:39,297 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:39,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 197 places, 279 transitions, 3942 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) [2024-06-03 19:32:39,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:39,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:39,298 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:40,394 INFO L124 PetriNetUnfolderBase]: 3455/5182 cut-off events. [2024-06-03 19:32:40,395 INFO L125 PetriNetUnfolderBase]: For 321773/321789 co-relation queries the response was YES. [2024-06-03 19:32:40,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43360 conditions, 5182 events. 3455/5182 cut-off events. For 321773/321789 co-relation queries the response was YES. Maximal size of possible extension queue 230. Compared 26783 event pairs, 665 based on Foata normal form. 22/5203 useless extension candidates. Maximal degree in co-relation 43267. Up to 4794 conditions per place. [2024-06-03 19:32:40,444 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 287 selfloop transitions, 76 changer transitions 0/366 dead transitions. [2024-06-03 19:32:40,444 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 366 transitions, 6031 flow [2024-06-03 19:32:40,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:32:40,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:32:40,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:32:40,445 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:32:40,446 INFO L175 Difference]: Start difference. First operand has 197 places, 279 transitions, 3942 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:32:40,446 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 366 transitions, 6031 flow [2024-06-03 19:32:40,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 366 transitions, 5745 flow, removed 142 selfloop flow, removed 1 redundant places. [2024-06-03 19:32:40,765 INFO L231 Difference]: Finished difference. Result has 209 places, 317 transitions, 4769 flow [2024-06-03 19:32:40,766 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=3798, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=4769, PETRI_PLACES=209, PETRI_TRANSITIONS=317} [2024-06-03 19:32:40,766 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 166 predicate places. [2024-06-03 19:32:40,766 INFO L495 AbstractCegarLoop]: Abstraction has has 209 places, 317 transitions, 4769 flow [2024-06-03 19:32:40,766 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) [2024-06-03 19:32:40,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:40,767 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:40,767 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 19:32:40,767 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)] === [2024-06-03 19:32:40,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:40,767 INFO L85 PathProgramCache]: Analyzing trace with hash 246588793, now seen corresponding path program 3 times [2024-06-03 19:32:40,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:40,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [349371566] [2024-06-03 19:32:40,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:40,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:40,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:41,858 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:41,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:41,858 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [349371566] [2024-06-03 19:32:41,858 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [349371566] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:41,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:41,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:41,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350076733] [2024-06-03 19:32:41,859 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:41,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:41,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:41,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:41,859 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:41,964 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:41,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 209 places, 317 transitions, 4769 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) [2024-06-03 19:32:41,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:41,965 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:41,965 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:43,185 INFO L124 PetriNetUnfolderBase]: 3534/5307 cut-off events. [2024-06-03 19:32:43,185 INFO L125 PetriNetUnfolderBase]: For 348958/348970 co-relation queries the response was YES. [2024-06-03 19:32:43,218 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45490 conditions, 5307 events. 3534/5307 cut-off events. For 348958/348970 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 27647 event pairs, 748 based on Foata normal form. 18/5324 useless extension candidates. Maximal degree in co-relation 45391. Up to 4839 conditions per place. [2024-06-03 19:32:43,239 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 284 selfloop transitions, 75 changer transitions 0/362 dead transitions. [2024-06-03 19:32:43,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 362 transitions, 6209 flow [2024-06-03 19:32:43,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 159 transitions. [2024-06-03 19:32:43,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42063492063492064 [2024-06-03 19:32:43,240 INFO L175 Difference]: Start difference. First operand has 209 places, 317 transitions, 4769 flow. Second operand 9 states and 159 transitions. [2024-06-03 19:32:43,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 362 transitions, 6209 flow [2024-06-03 19:32:43,631 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 362 transitions, 6004 flow, removed 71 selfloop flow, removed 4 redundant places. [2024-06-03 19:32:43,642 INFO L231 Difference]: Finished difference. Result has 215 places, 323 transitions, 4940 flow [2024-06-03 19:32:43,642 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4564, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=317, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4940, PETRI_PLACES=215, PETRI_TRANSITIONS=323} [2024-06-03 19:32:43,643 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 172 predicate places. [2024-06-03 19:32:43,643 INFO L495 AbstractCegarLoop]: Abstraction has has 215 places, 323 transitions, 4940 flow [2024-06-03 19:32:43,643 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) [2024-06-03 19:32:43,643 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:43,643 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:43,643 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 19:32:43,643 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)] === [2024-06-03 19:32:43,644 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:43,644 INFO L85 PathProgramCache]: Analyzing trace with hash -120728649, now seen corresponding path program 4 times [2024-06-03 19:32:43,644 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:43,644 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1042704018] [2024-06-03 19:32:43,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:43,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:43,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:44,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:44,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:44,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1042704018] [2024-06-03 19:32:44,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1042704018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:44,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:44,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:44,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716433474] [2024-06-03 19:32:44,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:44,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:44,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:44,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:44,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:44,670 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:44,671 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 323 transitions, 4940 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) [2024-06-03 19:32:44,671 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:44,671 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:44,671 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:45,825 INFO L124 PetriNetUnfolderBase]: 3537/5312 cut-off events. [2024-06-03 19:32:45,826 INFO L125 PetriNetUnfolderBase]: For 363010/363022 co-relation queries the response was YES. [2024-06-03 19:32:45,858 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45877 conditions, 5312 events. 3537/5312 cut-off events. For 363010/363022 co-relation queries the response was YES. Maximal size of possible extension queue 239. Compared 27677 event pairs, 744 based on Foata normal form. 18/5329 useless extension candidates. Maximal degree in co-relation 45775. Up to 4942 conditions per place. [2024-06-03 19:32:45,879 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 282 selfloop transitions, 77 changer transitions 0/362 dead transitions. [2024-06-03 19:32:45,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 362 transitions, 6076 flow [2024-06-03 19:32:45,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:45,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:45,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:32:45,881 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:32:45,881 INFO L175 Difference]: Start difference. First operand has 215 places, 323 transitions, 4940 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:32:45,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 362 transitions, 6076 flow [2024-06-03 19:32:46,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 362 transitions, 5768 flow, removed 86 selfloop flow, removed 6 redundant places. [2024-06-03 19:32:46,393 INFO L231 Difference]: Finished difference. Result has 218 places, 326 transitions, 4923 flow [2024-06-03 19:32:46,393 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4658, PETRI_DIFFERENCE_MINUEND_PLACES=209, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=323, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=246, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=4923, PETRI_PLACES=218, PETRI_TRANSITIONS=326} [2024-06-03 19:32:46,394 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 175 predicate places. [2024-06-03 19:32:46,394 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 326 transitions, 4923 flow [2024-06-03 19:32:46,394 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) [2024-06-03 19:32:46,394 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:46,394 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:46,394 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 19:32:46,394 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)] === [2024-06-03 19:32:46,395 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:46,395 INFO L85 PathProgramCache]: Analyzing trace with hash -832588225, now seen corresponding path program 5 times [2024-06-03 19:32:46,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:46,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1373598246] [2024-06-03 19:32:46,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:46,395 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:46,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:47,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:47,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:47,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1373598246] [2024-06-03 19:32:47,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1373598246] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:47,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:47,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:47,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23234479] [2024-06-03 19:32:47,384 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:47,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:47,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:47,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:47,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:47,453 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:47,453 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 326 transitions, 4923 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) [2024-06-03 19:32:47,453 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:47,453 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:47,453 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:48,644 INFO L124 PetriNetUnfolderBase]: 3689/5560 cut-off events. [2024-06-03 19:32:48,645 INFO L125 PetriNetUnfolderBase]: For 418336/418344 co-relation queries the response was YES. [2024-06-03 19:32:48,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47654 conditions, 5560 events. 3689/5560 cut-off events. For 418336/418344 co-relation queries the response was YES. Maximal size of possible extension queue 250. Compared 29386 event pairs, 710 based on Foata normal form. 44/5603 useless extension candidates. Maximal degree in co-relation 47551. Up to 4709 conditions per place. [2024-06-03 19:32:48,703 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 261 selfloop transitions, 104 changer transitions 0/368 dead transitions. [2024-06-03 19:32:48,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 226 places, 368 transitions, 6099 flow [2024-06-03 19:32:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:48,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:48,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:32:48,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 19:32:48,705 INFO L175 Difference]: Start difference. First operand has 218 places, 326 transitions, 4923 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:32:48,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 226 places, 368 transitions, 6099 flow [2024-06-03 19:32:49,279 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 219 places, 368 transitions, 5866 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:49,283 INFO L231 Difference]: Finished difference. Result has 220 places, 329 transitions, 5034 flow [2024-06-03 19:32:49,283 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4690, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=326, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=101, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=222, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5034, PETRI_PLACES=220, PETRI_TRANSITIONS=329} [2024-06-03 19:32:49,284 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 177 predicate places. [2024-06-03 19:32:49,284 INFO L495 AbstractCegarLoop]: Abstraction has has 220 places, 329 transitions, 5034 flow [2024-06-03 19:32:49,284 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) [2024-06-03 19:32:49,284 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:49,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:49,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 19:32:49,285 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)] === [2024-06-03 19:32:49,285 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:49,285 INFO L85 PathProgramCache]: Analyzing trace with hash 394417315, now seen corresponding path program 1 times [2024-06-03 19:32:49,285 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:49,285 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993385094] [2024-06-03 19:32:49,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:49,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:49,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:50,121 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:50,121 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:50,121 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993385094] [2024-06-03 19:32:50,121 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993385094] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:50,121 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:50,121 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:32:50,121 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115695672] [2024-06-03 19:32:50,121 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:50,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:32:50,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:50,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:32:50,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:32:50,181 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:50,181 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 329 transitions, 5034 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) [2024-06-03 19:32:50,181 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:50,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:50,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:51,470 INFO L124 PetriNetUnfolderBase]: 3917/5932 cut-off events. [2024-06-03 19:32:51,471 INFO L125 PetriNetUnfolderBase]: For 472720/472728 co-relation queries the response was YES. [2024-06-03 19:32:51,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52601 conditions, 5932 events. 3917/5932 cut-off events. For 472720/472728 co-relation queries the response was YES. Maximal size of possible extension queue 271. Compared 31933 event pairs, 747 based on Foata normal form. 32/5963 useless extension candidates. Maximal degree in co-relation 52497. Up to 4503 conditions per place. [2024-06-03 19:32:51,538 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 264 selfloop transitions, 111 changer transitions 0/378 dead transitions. [2024-06-03 19:32:51,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 378 transitions, 6542 flow [2024-06-03 19:32:51,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:51,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:51,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:32:51,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:32:51,539 INFO L175 Difference]: Start difference. First operand has 220 places, 329 transitions, 5034 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:32:51,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 378 transitions, 6542 flow [2024-06-03 19:32:52,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 378 transitions, 6242 flow, removed 49 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:52,154 INFO L231 Difference]: Finished difference. Result has 222 places, 333 transitions, 5167 flow [2024-06-03 19:32:52,154 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4734, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=329, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5167, PETRI_PLACES=222, PETRI_TRANSITIONS=333} [2024-06-03 19:32:52,155 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 179 predicate places. [2024-06-03 19:32:52,155 INFO L495 AbstractCegarLoop]: Abstraction has has 222 places, 333 transitions, 5167 flow [2024-06-03 19:32:52,155 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) [2024-06-03 19:32:52,155 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:52,155 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:52,155 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 19:32:52,156 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)] === [2024-06-03 19:32:52,156 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:52,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1382310593, now seen corresponding path program 6 times [2024-06-03 19:32:52,156 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:52,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898564729] [2024-06-03 19:32:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:52,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:52,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:53,295 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:53,295 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898564729] [2024-06-03 19:32:53,295 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898564729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:53,295 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:53,295 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:53,295 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837506275] [2024-06-03 19:32:53,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:53,295 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:53,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:53,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:53,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:53,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:53,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 222 places, 333 transitions, 5167 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) [2024-06-03 19:32:53,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:53,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:53,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:54,669 INFO L124 PetriNetUnfolderBase]: 3907/5918 cut-off events. [2024-06-03 19:32:54,669 INFO L125 PetriNetUnfolderBase]: For 446371/446379 co-relation queries the response was YES. [2024-06-03 19:32:54,709 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51612 conditions, 5918 events. 3907/5918 cut-off events. For 446371/446379 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 31916 event pairs, 803 based on Foata normal form. 14/5931 useless extension candidates. Maximal degree in co-relation 51507. Up to 5245 conditions per place. [2024-06-03 19:32:54,734 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 273 selfloop transitions, 96 changer transitions 0/372 dead transitions. [2024-06-03 19:32:54,734 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 372 transitions, 6441 flow [2024-06-03 19:32:54,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:54,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:54,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 161 transitions. [2024-06-03 19:32:54,735 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42592592592592593 [2024-06-03 19:32:54,736 INFO L175 Difference]: Start difference. First operand has 222 places, 333 transitions, 5167 flow. Second operand 9 states and 161 transitions. [2024-06-03 19:32:54,736 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 372 transitions, 6441 flow [2024-06-03 19:32:55,387 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 225 places, 372 transitions, 6220 flow, removed 41 selfloop flow, removed 5 redundant places. [2024-06-03 19:32:55,392 INFO L231 Difference]: Finished difference. Result has 226 places, 336 transitions, 5282 flow [2024-06-03 19:32:55,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4946, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5282, PETRI_PLACES=226, PETRI_TRANSITIONS=336} [2024-06-03 19:32:55,392 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 183 predicate places. [2024-06-03 19:32:55,392 INFO L495 AbstractCegarLoop]: Abstraction has has 226 places, 336 transitions, 5282 flow [2024-06-03 19:32:55,393 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) [2024-06-03 19:32:55,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:55,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:55,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 19:32:55,393 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)] === [2024-06-03 19:32:55,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:55,393 INFO L85 PathProgramCache]: Analyzing trace with hash 388691863, now seen corresponding path program 7 times [2024-06-03 19:32:55,394 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:55,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958151533] [2024-06-03 19:32:55,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:55,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:55,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:56,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:56,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:56,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958151533] [2024-06-03 19:32:56,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958151533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:56,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:56,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:32:56,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182727960] [2024-06-03 19:32:56,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:56,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:32:56,544 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:56,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:32:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:32:56,662 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:56,662 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 336 transitions, 5282 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) [2024-06-03 19:32:56,662 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:56,663 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:56,663 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:32:58,010 INFO L124 PetriNetUnfolderBase]: 4020/6089 cut-off events. [2024-06-03 19:32:58,010 INFO L125 PetriNetUnfolderBase]: For 472282/472290 co-relation queries the response was YES. [2024-06-03 19:32:58,060 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54064 conditions, 6089 events. 4020/6089 cut-off events. For 472282/472290 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 32993 event pairs, 841 based on Foata normal form. 14/6102 useless extension candidates. Maximal degree in co-relation 53957. Up to 5036 conditions per place. [2024-06-03 19:32:58,091 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 279 selfloop transitions, 101 changer transitions 0/383 dead transitions. [2024-06-03 19:32:58,092 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 234 places, 383 transitions, 6810 flow [2024-06-03 19:32:58,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:32:58,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:32:58,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 166 transitions. [2024-06-03 19:32:58,093 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43915343915343913 [2024-06-03 19:32:58,093 INFO L175 Difference]: Start difference. First operand has 226 places, 336 transitions, 5282 flow. Second operand 9 states and 166 transitions. [2024-06-03 19:32:58,093 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 234 places, 383 transitions, 6810 flow [2024-06-03 19:32:58,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 383 transitions, 6502 flow, removed 60 selfloop flow, removed 7 redundant places. [2024-06-03 19:32:58,787 INFO L231 Difference]: Finished difference. Result has 229 places, 342 transitions, 5438 flow [2024-06-03 19:32:58,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=4974, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=336, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=237, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=5438, PETRI_PLACES=229, PETRI_TRANSITIONS=342} [2024-06-03 19:32:58,788 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 186 predicate places. [2024-06-03 19:32:58,788 INFO L495 AbstractCegarLoop]: Abstraction has has 229 places, 342 transitions, 5438 flow [2024-06-03 19:32:58,788 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) [2024-06-03 19:32:58,788 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:32:58,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:32:58,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 19:32:58,789 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:32:58,789 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:32:58,789 INFO L85 PathProgramCache]: Analyzing trace with hash 2075534962, now seen corresponding path program 1 times [2024-06-03 19:32:58,789 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:32:58,789 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913656912] [2024-06-03 19:32:58,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:32:58,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:32:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:32:59,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:32:59,518 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:32:59,518 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913656912] [2024-06-03 19:32:59,518 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913656912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:32:59,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:32:59,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:32:59,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760598934] [2024-06-03 19:32:59,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:32:59,519 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:32:59,519 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:32:59,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:32:59,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:32:59,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:32:59,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 229 places, 342 transitions, 5438 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) [2024-06-03 19:32:59,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:32:59,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:32:59,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:00,860 INFO L124 PetriNetUnfolderBase]: 4028/6101 cut-off events. [2024-06-03 19:33:00,860 INFO L125 PetriNetUnfolderBase]: For 488640/488652 co-relation queries the response was YES. [2024-06-03 19:33:00,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54535 conditions, 6101 events. 4028/6101 cut-off events. For 488640/488652 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33188 event pairs, 919 based on Foata normal form. 20/6120 useless extension candidates. Maximal degree in co-relation 54426. Up to 5917 conditions per place. [2024-06-03 19:33:00,941 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 305 selfloop transitions, 66 changer transitions 0/374 dead transitions. [2024-06-03 19:33:00,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 235 places, 374 transitions, 6613 flow [2024-06-03 19:33:00,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:00,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:00,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 119 transitions. [2024-06-03 19:33:00,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:33:00,943 INFO L175 Difference]: Start difference. First operand has 229 places, 342 transitions, 5438 flow. Second operand 7 states and 119 transitions. [2024-06-03 19:33:00,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 235 places, 374 transitions, 6613 flow [2024-06-03 19:33:01,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 230 places, 374 transitions, 6256 flow, removed 110 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:01,616 INFO L231 Difference]: Finished difference. Result has 231 places, 352 transitions, 5495 flow [2024-06-03 19:33:01,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5095, PETRI_DIFFERENCE_MINUEND_PLACES=224, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=342, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=286, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5495, PETRI_PLACES=231, PETRI_TRANSITIONS=352} [2024-06-03 19:33:01,617 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 188 predicate places. [2024-06-03 19:33:01,617 INFO L495 AbstractCegarLoop]: Abstraction has has 231 places, 352 transitions, 5495 flow [2024-06-03 19:33:01,617 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) [2024-06-03 19:33:01,617 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:01,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:01,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 19:33:01,618 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)] === [2024-06-03 19:33:01,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:01,618 INFO L85 PathProgramCache]: Analyzing trace with hash 2075833492, now seen corresponding path program 2 times [2024-06-03 19:33:01,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:01,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568622843] [2024-06-03 19:33:01,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:01,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:01,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:02,383 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:02,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:02,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568622843] [2024-06-03 19:33:02,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568622843] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:02,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:02,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:02,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203503557] [2024-06-03 19:33:02,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:02,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:02,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:02,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:02,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:02,445 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:02,445 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 352 transitions, 5495 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) [2024-06-03 19:33:02,445 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:02,445 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:02,445 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:03,715 INFO L124 PetriNetUnfolderBase]: 4032/6107 cut-off events. [2024-06-03 19:33:03,716 INFO L125 PetriNetUnfolderBase]: For 486108/486116 co-relation queries the response was YES. [2024-06-03 19:33:03,761 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54003 conditions, 6107 events. 4032/6107 cut-off events. For 486108/486116 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33166 event pairs, 884 based on Foata normal form. 12/6118 useless extension candidates. Maximal degree in co-relation 53892. Up to 5922 conditions per place. [2024-06-03 19:33:03,787 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 303 selfloop transitions, 69 changer transitions 0/375 dead transitions. [2024-06-03 19:33:03,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 237 places, 375 transitions, 6537 flow [2024-06-03 19:33:03,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:03,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:03,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 115 transitions. [2024-06-03 19:33:03,789 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.391156462585034 [2024-06-03 19:33:03,789 INFO L175 Difference]: Start difference. First operand has 231 places, 352 transitions, 5495 flow. Second operand 7 states and 115 transitions. [2024-06-03 19:33:03,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 237 places, 375 transitions, 6537 flow [2024-06-03 19:33:04,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 375 transitions, 6356 flow, removed 48 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:04,626 INFO L231 Difference]: Finished difference. Result has 234 places, 357 transitions, 5596 flow [2024-06-03 19:33:04,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5319, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5596, PETRI_PLACES=234, PETRI_TRANSITIONS=357} [2024-06-03 19:33:04,626 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 191 predicate places. [2024-06-03 19:33:04,626 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 357 transitions, 5596 flow [2024-06-03 19:33:04,627 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) [2024-06-03 19:33:04,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:04,627 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:04,627 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 19:33:04,627 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)] === [2024-06-03 19:33:04,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:04,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1106080986, now seen corresponding path program 1 times [2024-06-03 19:33:04,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:04,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076351908] [2024-06-03 19:33:04,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:04,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:05,320 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:05,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:05,320 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076351908] [2024-06-03 19:33:05,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076351908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:05,321 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:05,321 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:05,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322400978] [2024-06-03 19:33:05,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:05,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:05,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:05,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:05,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:05,365 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:05,366 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 357 transitions, 5596 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) [2024-06-03 19:33:05,366 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:05,366 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:05,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:06,703 INFO L124 PetriNetUnfolderBase]: 4037/6112 cut-off events. [2024-06-03 19:33:06,704 INFO L125 PetriNetUnfolderBase]: For 496582/496590 co-relation queries the response was YES. [2024-06-03 19:33:06,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54290 conditions, 6112 events. 4037/6112 cut-off events. For 496582/496590 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 33141 event pairs, 928 based on Foata normal form. 9/6120 useless extension candidates. Maximal degree in co-relation 54178. Up to 6043 conditions per place. [2024-06-03 19:33:06,781 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 350 selfloop transitions, 29 changer transitions 0/382 dead transitions. [2024-06-03 19:33:06,782 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 382 transitions, 6608 flow [2024-06-03 19:33:06,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:06,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:06,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 112 transitions. [2024-06-03 19:33:06,783 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:33:06,783 INFO L175 Difference]: Start difference. First operand has 234 places, 357 transitions, 5596 flow. Second operand 7 states and 112 transitions. [2024-06-03 19:33:06,783 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 382 transitions, 6608 flow [2024-06-03 19:33:07,529 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 382 transitions, 6462 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:07,534 INFO L231 Difference]: Finished difference. Result has 238 places, 366 transitions, 5632 flow [2024-06-03 19:33:07,534 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5450, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=357, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5632, PETRI_PLACES=238, PETRI_TRANSITIONS=366} [2024-06-03 19:33:07,534 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 195 predicate places. [2024-06-03 19:33:07,535 INFO L495 AbstractCegarLoop]: Abstraction has has 238 places, 366 transitions, 5632 flow [2024-06-03 19:33:07,535 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) [2024-06-03 19:33:07,535 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:07,535 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:07,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 19:33:07,535 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:07,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:07,536 INFO L85 PathProgramCache]: Analyzing trace with hash 60445009, now seen corresponding path program 2 times [2024-06-03 19:33:07,536 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:07,536 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031318674] [2024-06-03 19:33:07,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:07,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:07,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:08,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:08,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:08,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031318674] [2024-06-03 19:33:08,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031318674] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:08,338 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:08,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:33:08,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807047787] [2024-06-03 19:33:08,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:08,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:33:08,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:08,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:33:08,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:33:08,435 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:08,436 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 366 transitions, 5632 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) [2024-06-03 19:33:08,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:08,436 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:08,436 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:09,761 INFO L124 PetriNetUnfolderBase]: 4281/6508 cut-off events. [2024-06-03 19:33:09,761 INFO L125 PetriNetUnfolderBase]: For 610769/610785 co-relation queries the response was YES. [2024-06-03 19:33:09,812 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59785 conditions, 6508 events. 4281/6508 cut-off events. For 610769/610785 co-relation queries the response was YES. Maximal size of possible extension queue 303. Compared 35935 event pairs, 776 based on Foata normal form. 37/6544 useless extension candidates. Maximal degree in co-relation 59671. Up to 3653 conditions per place. [2024-06-03 19:33:09,841 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 202 selfloop transitions, 208 changer transitions 0/413 dead transitions. [2024-06-03 19:33:09,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 413 transitions, 7260 flow [2024-06-03 19:33:09,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:09,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:09,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:33:09,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 19:33:09,843 INFO L175 Difference]: Start difference. First operand has 238 places, 366 transitions, 5632 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:33:09,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 413 transitions, 7260 flow [2024-06-03 19:33:10,601 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 244 places, 413 transitions, 7205 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 19:33:10,607 INFO L231 Difference]: Finished difference. Result has 245 places, 370 transitions, 6220 flow [2024-06-03 19:33:10,607 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5577, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=366, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=206, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=160, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6220, PETRI_PLACES=245, PETRI_TRANSITIONS=370} [2024-06-03 19:33:10,607 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 202 predicate places. [2024-06-03 19:33:10,608 INFO L495 AbstractCegarLoop]: Abstraction has has 245 places, 370 transitions, 6220 flow [2024-06-03 19:33:10,608 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) [2024-06-03 19:33:10,608 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:10,608 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:10,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 19:33:10,608 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:10,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:10,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1142798431, now seen corresponding path program 8 times [2024-06-03 19:33:10,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:10,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83119064] [2024-06-03 19:33:10,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:10,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:10,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:11,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:11,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:11,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83119064] [2024-06-03 19:33:11,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83119064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:11,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:11,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:11,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884662853] [2024-06-03 19:33:11,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:11,719 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:11,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:11,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:11,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:11,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:11,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 245 places, 370 transitions, 6220 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) [2024-06-03 19:33:11,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:11,822 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:11,822 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:13,554 INFO L124 PetriNetUnfolderBase]: 4619/7018 cut-off events. [2024-06-03 19:33:13,554 INFO L125 PetriNetUnfolderBase]: For 644370/644378 co-relation queries the response was YES. [2024-06-03 19:33:13,601 INFO L83 FinitePrefix]: Finished finitePrefix Result has 66395 conditions, 7018 events. 4619/7018 cut-off events. For 644370/644378 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 39534 event pairs, 988 based on Foata normal form. 14/7031 useless extension candidates. Maximal degree in co-relation 66278. Up to 6484 conditions per place. [2024-06-03 19:33:13,631 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 351 selfloop transitions, 126 changer transitions 0/480 dead transitions. [2024-06-03 19:33:13,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 254 places, 480 transitions, 8967 flow [2024-06-03 19:33:13,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:33:13,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:33:13,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 175 transitions. [2024-06-03 19:33:13,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4166666666666667 [2024-06-03 19:33:13,632 INFO L175 Difference]: Start difference. First operand has 245 places, 370 transitions, 6220 flow. Second operand 10 states and 175 transitions. [2024-06-03 19:33:13,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 254 places, 480 transitions, 8967 flow [2024-06-03 19:33:14,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 249 places, 480 transitions, 8596 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:14,703 INFO L231 Difference]: Finished difference. Result has 254 places, 430 transitions, 7546 flow [2024-06-03 19:33:14,704 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=5885, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=370, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=68, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=271, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7546, PETRI_PLACES=254, PETRI_TRANSITIONS=430} [2024-06-03 19:33:14,704 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 211 predicate places. [2024-06-03 19:33:14,704 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 430 transitions, 7546 flow [2024-06-03 19:33:14,704 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) [2024-06-03 19:33:14,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:14,705 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:14,705 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 19:33:14,705 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:14,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:14,705 INFO L85 PathProgramCache]: Analyzing trace with hash -16404777, now seen corresponding path program 3 times [2024-06-03 19:33:14,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:14,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1807944510] [2024-06-03 19:33:14,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:14,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:14,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:15,560 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:15,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:15,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1807944510] [2024-06-03 19:33:15,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1807944510] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:15,561 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:15,561 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:33:15,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091154483] [2024-06-03 19:33:15,561 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:15,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:33:15,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:15,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:33:15,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:33:15,639 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:15,640 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 430 transitions, 7546 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) [2024-06-03 19:33:15,640 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:15,640 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:15,640 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:17,284 INFO L124 PetriNetUnfolderBase]: 4755/7244 cut-off events. [2024-06-03 19:33:17,284 INFO L125 PetriNetUnfolderBase]: For 725455/725467 co-relation queries the response was YES. [2024-06-03 19:33:17,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69502 conditions, 7244 events. 4755/7244 cut-off events. For 725455/725467 co-relation queries the response was YES. Maximal size of possible extension queue 345. Compared 41262 event pairs, 963 based on Foata normal form. 48/7291 useless extension candidates. Maximal degree in co-relation 69379. Up to 5852 conditions per place. [2024-06-03 19:33:17,380 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 260 selfloop transitions, 207 changer transitions 0/470 dead transitions. [2024-06-03 19:33:17,380 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 262 places, 470 transitions, 8988 flow [2024-06-03 19:33:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:17,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:17,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 168 transitions. [2024-06-03 19:33:17,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4444444444444444 [2024-06-03 19:33:17,381 INFO L175 Difference]: Start difference. First operand has 254 places, 430 transitions, 7546 flow. Second operand 9 states and 168 transitions. [2024-06-03 19:33:17,382 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 262 places, 470 transitions, 8988 flow [2024-06-03 19:33:18,747 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 470 transitions, 8785 flow, removed 97 selfloop flow, removed 2 redundant places. [2024-06-03 19:33:18,754 INFO L231 Difference]: Finished difference. Result has 261 places, 433 transitions, 7917 flow [2024-06-03 19:33:18,754 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7343, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=430, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7917, PETRI_PLACES=261, PETRI_TRANSITIONS=433} [2024-06-03 19:33:18,754 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 218 predicate places. [2024-06-03 19:33:18,754 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 433 transitions, 7917 flow [2024-06-03 19:33:18,755 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) [2024-06-03 19:33:18,755 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:18,755 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:18,755 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 19:33:18,755 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:18,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:18,755 INFO L85 PathProgramCache]: Analyzing trace with hash 60185539, now seen corresponding path program 4 times [2024-06-03 19:33:18,756 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:18,756 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188895648] [2024-06-03 19:33:18,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:18,756 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:18,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:19,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:19,586 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:19,586 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188895648] [2024-06-03 19:33:19,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188895648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:19,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:19,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:33:19,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435660345] [2024-06-03 19:33:19,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:19,586 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:33:19,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:19,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:33:19,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:33:19,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:19,673 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 433 transitions, 7917 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) [2024-06-03 19:33:19,673 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:19,673 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:19,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:21,295 INFO L124 PetriNetUnfolderBase]: 4935/7539 cut-off events. [2024-06-03 19:33:21,295 INFO L125 PetriNetUnfolderBase]: For 780931/780943 co-relation queries the response was YES. [2024-06-03 19:33:21,364 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74090 conditions, 7539 events. 4935/7539 cut-off events. For 780931/780943 co-relation queries the response was YES. Maximal size of possible extension queue 361. Compared 43432 event pairs, 1007 based on Foata normal form. 36/7574 useless extension candidates. Maximal degree in co-relation 73965. Up to 5668 conditions per place. [2024-06-03 19:33:21,402 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 262 selfloop transitions, 214 changer transitions 0/479 dead transitions. [2024-06-03 19:33:21,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 269 places, 479 transitions, 9701 flow [2024-06-03 19:33:21,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:21,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:21,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:33:21,404 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:33:21,404 INFO L175 Difference]: Start difference. First operand has 261 places, 433 transitions, 7917 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:33:21,404 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 269 places, 479 transitions, 9701 flow [2024-06-03 19:33:22,945 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 479 transitions, 9183 flow, removed 55 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:22,952 INFO L231 Difference]: Finished difference. Result has 263 places, 437 transitions, 8071 flow [2024-06-03 19:33:22,952 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7399, PETRI_DIFFERENCE_MINUEND_PLACES=254, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=433, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8071, PETRI_PLACES=263, PETRI_TRANSITIONS=437} [2024-06-03 19:33:22,952 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 220 predicate places. [2024-06-03 19:33:22,952 INFO L495 AbstractCegarLoop]: Abstraction has has 263 places, 437 transitions, 8071 flow [2024-06-03 19:33:22,953 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) [2024-06-03 19:33:22,953 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:22,953 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:22,953 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 19:33:22,953 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)] === [2024-06-03 19:33:22,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:22,954 INFO L85 PathProgramCache]: Analyzing trace with hash 1322962239, now seen corresponding path program 9 times [2024-06-03 19:33:22,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:22,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276132547] [2024-06-03 19:33:22,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:22,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:22,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:24,029 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:24,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:24,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276132547] [2024-06-03 19:33:24,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276132547] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:24,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:24,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:24,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572770288] [2024-06-03 19:33:24,030 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:24,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:24,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:24,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:24,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:24,174 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:24,174 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 263 places, 437 transitions, 8071 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) [2024-06-03 19:33:24,174 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:24,174 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:24,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:25,932 INFO L124 PetriNetUnfolderBase]: 4963/7583 cut-off events. [2024-06-03 19:33:25,933 INFO L125 PetriNetUnfolderBase]: For 762094/762106 co-relation queries the response was YES. [2024-06-03 19:33:25,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74140 conditions, 7583 events. 4963/7583 cut-off events. For 762094/762106 co-relation queries the response was YES. Maximal size of possible extension queue 363. Compared 43665 event pairs, 1052 based on Foata normal form. 18/7600 useless extension candidates. Maximal degree in co-relation 74014. Up to 6352 conditions per place. [2024-06-03 19:33:26,025 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 287 selfloop transitions, 185 changer transitions 0/475 dead transitions. [2024-06-03 19:33:26,025 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 271 places, 475 transitions, 9749 flow [2024-06-03 19:33:26,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:26,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:26,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 165 transitions. [2024-06-03 19:33:26,026 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4365079365079365 [2024-06-03 19:33:26,026 INFO L175 Difference]: Start difference. First operand has 263 places, 437 transitions, 8071 flow. Second operand 9 states and 165 transitions. [2024-06-03 19:33:26,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 271 places, 475 transitions, 9749 flow [2024-06-03 19:33:27,184 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 475 transitions, 9358 flow, removed 55 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:27,191 INFO L231 Difference]: Finished difference. Result has 267 places, 440 transitions, 8218 flow [2024-06-03 19:33:27,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7680, PETRI_DIFFERENCE_MINUEND_PLACES=258, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=437, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8218, PETRI_PLACES=267, PETRI_TRANSITIONS=440} [2024-06-03 19:33:27,192 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 224 predicate places. [2024-06-03 19:33:27,193 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 440 transitions, 8218 flow [2024-06-03 19:33:27,193 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) [2024-06-03 19:33:27,193 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:27,193 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:27,193 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 19:33:27,193 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)] === [2024-06-03 19:33:27,193 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:27,194 INFO L85 PathProgramCache]: Analyzing trace with hash 1747383, now seen corresponding path program 10 times [2024-06-03 19:33:27,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:27,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136989126] [2024-06-03 19:33:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:27,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:27,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:28,264 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:28,264 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:28,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136989126] [2024-06-03 19:33:28,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [136989126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:28,265 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:28,265 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:28,265 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340401920] [2024-06-03 19:33:28,265 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:28,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:28,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:28,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:28,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:28,347 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:28,348 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 440 transitions, 8218 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) [2024-06-03 19:33:28,348 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:28,348 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:28,348 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:30,043 INFO L124 PetriNetUnfolderBase]: 5246/8024 cut-off events. [2024-06-03 19:33:30,043 INFO L125 PetriNetUnfolderBase]: For 869606/869618 co-relation queries the response was YES. [2024-06-03 19:33:30,112 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81501 conditions, 8024 events. 5246/8024 cut-off events. For 869606/869618 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 46946 event pairs, 1154 based on Foata normal form. 18/8041 useless extension candidates. Maximal degree in co-relation 81373. Up to 6127 conditions per place. [2024-06-03 19:33:30,150 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 295 selfloop transitions, 191 changer transitions 0/489 dead transitions. [2024-06-03 19:33:30,150 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 275 places, 489 transitions, 10416 flow [2024-06-03 19:33:30,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:30,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:30,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 171 transitions. [2024-06-03 19:33:30,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4523809523809524 [2024-06-03 19:33:30,156 INFO L175 Difference]: Start difference. First operand has 267 places, 440 transitions, 8218 flow. Second operand 9 states and 171 transitions. [2024-06-03 19:33:30,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 275 places, 489 transitions, 10416 flow [2024-06-03 19:33:31,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 489 transitions, 9936 flow, removed 72 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:31,501 INFO L231 Difference]: Finished difference. Result has 271 places, 447 transitions, 8470 flow [2024-06-03 19:33:31,502 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7738, PETRI_DIFFERENCE_MINUEND_PLACES=261, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=440, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=186, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=251, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8470, PETRI_PLACES=271, PETRI_TRANSITIONS=447} [2024-06-03 19:33:31,502 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 228 predicate places. [2024-06-03 19:33:31,502 INFO L495 AbstractCegarLoop]: Abstraction has has 271 places, 447 transitions, 8470 flow [2024-06-03 19:33:31,502 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) [2024-06-03 19:33:31,503 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:31,503 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:31,503 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 19:33:31,503 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)] === [2024-06-03 19:33:31,503 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 1328676531, now seen corresponding path program 5 times [2024-06-03 19:33:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470633926] [2024-06-03 19:33:31,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:31,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:32,362 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:32,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:32,362 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470633926] [2024-06-03 19:33:32,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470633926] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:32,363 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:32,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:33:32,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092344941] [2024-06-03 19:33:32,363 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:32,363 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:33:32,363 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:32,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:33:32,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:33:32,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:32,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 271 places, 447 transitions, 8470 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) [2024-06-03 19:33:32,428 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:32,428 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:32,428 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:34,399 INFO L124 PetriNetUnfolderBase]: 5190/7944 cut-off events. [2024-06-03 19:33:34,400 INFO L125 PetriNetUnfolderBase]: For 886399/886411 co-relation queries the response was YES. [2024-06-03 19:33:34,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79352 conditions, 7944 events. 5190/7944 cut-off events. For 886399/886411 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 46339 event pairs, 1154 based on Foata normal form. 48/7991 useless extension candidates. Maximal degree in co-relation 79222. Up to 6535 conditions per place. [2024-06-03 19:33:34,493 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 301 selfloop transitions, 183 changer transitions 0/487 dead transitions. [2024-06-03 19:33:34,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 279 places, 487 transitions, 10059 flow [2024-06-03 19:33:34,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:34,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:34,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 169 transitions. [2024-06-03 19:33:34,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4470899470899471 [2024-06-03 19:33:34,495 INFO L175 Difference]: Start difference. First operand has 271 places, 447 transitions, 8470 flow. Second operand 9 states and 169 transitions. [2024-06-03 19:33:34,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 279 places, 487 transitions, 10059 flow [2024-06-03 19:33:35,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 487 transitions, 9564 flow, removed 113 selfloop flow, removed 6 redundant places. [2024-06-03 19:33:35,750 INFO L231 Difference]: Finished difference. Result has 274 places, 449 transitions, 8474 flow [2024-06-03 19:33:35,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7993, PETRI_DIFFERENCE_MINUEND_PLACES=265, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8474, PETRI_PLACES=274, PETRI_TRANSITIONS=449} [2024-06-03 19:33:35,750 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 231 predicate places. [2024-06-03 19:33:35,750 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 449 transitions, 8474 flow [2024-06-03 19:33:35,750 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) [2024-06-03 19:33:35,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:35,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:35,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 19:33:35,751 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:35,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:35,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1328683971, now seen corresponding path program 6 times [2024-06-03 19:33:35,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:35,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470887996] [2024-06-03 19:33:35,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:35,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:35,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:36,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:36,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470887996] [2024-06-03 19:33:36,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470887996] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:36,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:36,575 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:33:36,575 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854405377] [2024-06-03 19:33:36,575 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:36,575 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:33:36,575 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:36,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:33:36,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:33:36,667 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:36,668 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 449 transitions, 8474 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) [2024-06-03 19:33:36,668 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:36,668 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:36,668 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:38,487 INFO L124 PetriNetUnfolderBase]: 5210/7988 cut-off events. [2024-06-03 19:33:38,487 INFO L125 PetriNetUnfolderBase]: For 867064/867076 co-relation queries the response was YES. [2024-06-03 19:33:38,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78731 conditions, 7988 events. 5210/7988 cut-off events. For 867064/867076 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46813 event pairs, 1111 based on Foata normal form. 36/8023 useless extension candidates. Maximal degree in co-relation 78600. Up to 6063 conditions per place. [2024-06-03 19:33:38,597 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 301 selfloop transitions, 190 changer transitions 0/494 dead transitions. [2024-06-03 19:33:38,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 494 transitions, 10340 flow [2024-06-03 19:33:38,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:33:38,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:33:38,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 172 transitions. [2024-06-03 19:33:38,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.455026455026455 [2024-06-03 19:33:38,599 INFO L175 Difference]: Start difference. First operand has 274 places, 449 transitions, 8474 flow. Second operand 9 states and 172 transitions. [2024-06-03 19:33:38,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 494 transitions, 10340 flow [2024-06-03 19:33:40,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 494 transitions, 9868 flow, removed 56 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:40,038 INFO L231 Difference]: Finished difference. Result has 276 places, 451 transitions, 8517 flow [2024-06-03 19:33:40,039 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8010, PETRI_DIFFERENCE_MINUEND_PLACES=267, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=261, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=8517, PETRI_PLACES=276, PETRI_TRANSITIONS=451} [2024-06-03 19:33:40,039 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 233 predicate places. [2024-06-03 19:33:40,039 INFO L495 AbstractCegarLoop]: Abstraction has has 276 places, 451 transitions, 8517 flow [2024-06-03 19:33:40,039 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) [2024-06-03 19:33:40,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:40,040 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:40,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 19:33:40,040 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:40,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:40,040 INFO L85 PathProgramCache]: Analyzing trace with hash 2032331226, now seen corresponding path program 2 times [2024-06-03 19:33:40,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:40,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789484224] [2024-06-03 19:33:40,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:40,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:40,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:40,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789484224] [2024-06-03 19:33:40,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789484224] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:40,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:40,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:40,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804292809] [2024-06-03 19:33:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:40,776 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:40,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:40,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:40,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 276 places, 451 transitions, 8517 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) [2024-06-03 19:33:40,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:40,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:40,844 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:42,750 INFO L124 PetriNetUnfolderBase]: 5215/7993 cut-off events. [2024-06-03 19:33:42,751 INFO L125 PetriNetUnfolderBase]: For 826153/826161 co-relation queries the response was YES. [2024-06-03 19:33:42,822 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77948 conditions, 7993 events. 5215/7993 cut-off events. For 826153/826161 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46961 event pairs, 1316 based on Foata normal form. 9/8001 useless extension candidates. Maximal degree in co-relation 77816. Up to 7906 conditions per place. [2024-06-03 19:33:43,022 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 426 selfloop transitions, 35 changer transitions 0/464 dead transitions. [2024-06-03 19:33:43,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 464 transitions, 9633 flow [2024-06-03 19:33:43,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:43,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:43,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 106 transitions. [2024-06-03 19:33:43,023 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36054421768707484 [2024-06-03 19:33:43,023 INFO L175 Difference]: Start difference. First operand has 276 places, 451 transitions, 8517 flow. Second operand 7 states and 106 transitions. [2024-06-03 19:33:43,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 464 transitions, 9633 flow [2024-06-03 19:33:44,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 274 places, 464 transitions, 8971 flow, removed 57 selfloop flow, removed 8 redundant places. [2024-06-03 19:33:44,345 INFO L231 Difference]: Finished difference. Result has 275 places, 454 transitions, 7973 flow [2024-06-03 19:33:44,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7855, PETRI_DIFFERENCE_MINUEND_PLACES=268, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=451, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=419, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7973, PETRI_PLACES=275, PETRI_TRANSITIONS=454} [2024-06-03 19:33:44,346 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 232 predicate places. [2024-06-03 19:33:44,346 INFO L495 AbstractCegarLoop]: Abstraction has has 275 places, 454 transitions, 7973 flow [2024-06-03 19:33:44,346 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) [2024-06-03 19:33:44,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:44,347 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:44,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 19:33:44,347 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:44,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:44,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1864454682, now seen corresponding path program 3 times [2024-06-03 19:33:44,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:44,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492308764] [2024-06-03 19:33:44,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:44,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:44,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:45,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:45,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:45,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492308764] [2024-06-03 19:33:45,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492308764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:45,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:45,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:45,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708412767] [2024-06-03 19:33:45,043 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:45,043 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:45,043 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:45,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:45,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:45,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:45,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 275 places, 454 transitions, 7973 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) [2024-06-03 19:33:45,104 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:45,104 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:45,104 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:47,082 INFO L124 PetriNetUnfolderBase]: 5212/7989 cut-off events. [2024-06-03 19:33:47,083 INFO L125 PetriNetUnfolderBase]: For 817320/817328 co-relation queries the response was YES. [2024-06-03 19:33:47,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75325 conditions, 7989 events. 5212/7989 cut-off events. For 817320/817328 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46936 event pairs, 1316 based on Foata normal form. 9/7997 useless extension candidates. Maximal degree in co-relation 75193. Up to 7903 conditions per place. [2024-06-03 19:33:47,191 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 422 selfloop transitions, 38 changer transitions 0/463 dead transitions. [2024-06-03 19:33:47,191 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 281 places, 463 transitions, 8919 flow [2024-06-03 19:33:47,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:47,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:47,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 104 transitions. [2024-06-03 19:33:47,192 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35374149659863946 [2024-06-03 19:33:47,193 INFO L175 Difference]: Start difference. First operand has 275 places, 454 transitions, 7973 flow. Second operand 7 states and 104 transitions. [2024-06-03 19:33:47,193 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 281 places, 463 transitions, 8919 flow [2024-06-03 19:33:48,548 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 277 places, 463 transitions, 8805 flow, removed 26 selfloop flow, removed 4 redundant places. [2024-06-03 19:33:48,554 INFO L231 Difference]: Finished difference. Result has 278 places, 454 transitions, 7941 flow [2024-06-03 19:33:48,555 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7859, PETRI_DIFFERENCE_MINUEND_PLACES=271, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=416, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7941, PETRI_PLACES=278, PETRI_TRANSITIONS=454} [2024-06-03 19:33:48,555 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 235 predicate places. [2024-06-03 19:33:48,555 INFO L495 AbstractCegarLoop]: Abstraction has has 278 places, 454 transitions, 7941 flow [2024-06-03 19:33:48,555 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) [2024-06-03 19:33:48,556 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:48,556 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:48,556 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 19:33:48,556 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:48,556 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:48,556 INFO L85 PathProgramCache]: Analyzing trace with hash -150689580, now seen corresponding path program 3 times [2024-06-03 19:33:48,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:48,557 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042872747] [2024-06-03 19:33:48,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:48,557 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:48,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:49,296 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:49,296 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:49,296 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042872747] [2024-06-03 19:33:49,296 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042872747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:49,296 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:49,296 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:33:49,296 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093636554] [2024-06-03 19:33:49,296 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:49,296 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:33:49,296 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:49,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:33:49,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:33:49,342 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:49,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 278 places, 454 transitions, 7941 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) [2024-06-03 19:33:49,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:49,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:49,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:51,132 INFO L124 PetriNetUnfolderBase]: 5206/7983 cut-off events. [2024-06-03 19:33:51,133 INFO L125 PetriNetUnfolderBase]: For 837345/837357 co-relation queries the response was YES. [2024-06-03 19:33:51,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75399 conditions, 7983 events. 5206/7983 cut-off events. For 837345/837357 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 46805 event pairs, 1257 based on Foata normal form. 14/7996 useless extension candidates. Maximal degree in co-relation 75266. Up to 7747 conditions per place. [2024-06-03 19:33:51,245 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 370 selfloop transitions, 91 changer transitions 0/464 dead transitions. [2024-06-03 19:33:51,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 284 places, 464 transitions, 8896 flow [2024-06-03 19:33:51,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:33:51,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:33:51,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:33:51,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-03 19:33:51,247 INFO L175 Difference]: Start difference. First operand has 278 places, 454 transitions, 7941 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:33:51,247 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 284 places, 464 transitions, 8896 flow [2024-06-03 19:33:52,748 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 279 places, 464 transitions, 8798 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:33:52,755 INFO L231 Difference]: Finished difference. Result has 280 places, 454 transitions, 8033 flow [2024-06-03 19:33:52,755 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7843, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=363, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8033, PETRI_PLACES=280, PETRI_TRANSITIONS=454} [2024-06-03 19:33:52,756 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 237 predicate places. [2024-06-03 19:33:52,756 INFO L495 AbstractCegarLoop]: Abstraction has has 280 places, 454 transitions, 8033 flow [2024-06-03 19:33:52,756 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) [2024-06-03 19:33:52,756 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:52,756 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:52,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 19:33:52,756 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:33:52,757 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:52,757 INFO L85 PathProgramCache]: Analyzing trace with hash 974016169, now seen corresponding path program 11 times [2024-06-03 19:33:52,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:52,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332975764] [2024-06-03 19:33:52,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:52,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:52,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:53,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:53,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:53,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332975764] [2024-06-03 19:33:53,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332975764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:53,666 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:53,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:33:53,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997455479] [2024-06-03 19:33:53,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:53,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:33:53,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:53,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:33:53,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:33:53,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:33:53,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 280 places, 454 transitions, 8033 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) [2024-06-03 19:33:53,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:53,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:33:53,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:33:55,630 INFO L124 PetriNetUnfolderBase]: 5458/8368 cut-off events. [2024-06-03 19:33:55,631 INFO L125 PetriNetUnfolderBase]: For 899100/899108 co-relation queries the response was YES. [2024-06-03 19:33:55,708 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79216 conditions, 8368 events. 5458/8368 cut-off events. For 899100/899108 co-relation queries the response was YES. Maximal size of possible extension queue 418. Compared 49485 event pairs, 1006 based on Foata normal form. 14/8381 useless extension candidates. Maximal degree in co-relation 79082. Up to 7576 conditions per place. [2024-06-03 19:33:55,747 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 377 selfloop transitions, 156 changer transitions 0/536 dead transitions. [2024-06-03 19:33:55,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 289 places, 536 transitions, 10442 flow [2024-06-03 19:33:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:33:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:33:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 172 transitions. [2024-06-03 19:33:55,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4095238095238095 [2024-06-03 19:33:55,749 INFO L175 Difference]: Start difference. First operand has 280 places, 454 transitions, 8033 flow. Second operand 10 states and 172 transitions. [2024-06-03 19:33:55,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 289 places, 536 transitions, 10442 flow [2024-06-03 19:33:57,665 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 536 transitions, 10174 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 19:33:57,672 INFO L231 Difference]: Finished difference. Result has 286 places, 493 transitions, 9051 flow [2024-06-03 19:33:57,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=7765, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=454, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=310, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9051, PETRI_PLACES=286, PETRI_TRANSITIONS=493} [2024-06-03 19:33:57,673 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 243 predicate places. [2024-06-03 19:33:57,673 INFO L495 AbstractCegarLoop]: Abstraction has has 286 places, 493 transitions, 9051 flow [2024-06-03 19:33:57,673 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) [2024-06-03 19:33:57,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:33:57,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:33:57,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 19:33:57,674 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)] === [2024-06-03 19:33:57,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:33:57,674 INFO L85 PathProgramCache]: Analyzing trace with hash -2041817400, now seen corresponding path program 1 times [2024-06-03 19:33:57,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:33:57,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13348825] [2024-06-03 19:33:57,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:33:57,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:33:57,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:33:58,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:33:58,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:33:58,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13348825] [2024-06-03 19:33:58,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [13348825] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:33:58,446 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:33:58,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:33:58,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662848753] [2024-06-03 19:33:58,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:33:58,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:33:58,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:33:58,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:33:58,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:33:58,512 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:33:58,513 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 286 places, 493 transitions, 9051 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) [2024-06-03 19:33:58,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:33:58,513 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:33:58,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:00,254 INFO L124 PetriNetUnfolderBase]: 5306/8240 cut-off events. [2024-06-03 19:34:00,254 INFO L125 PetriNetUnfolderBase]: For 855187/855187 co-relation queries the response was YES. [2024-06-03 19:34:00,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78345 conditions, 8240 events. 5306/8240 cut-off events. For 855187/855187 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 49942 event pairs, 1419 based on Foata normal form. 4/8239 useless extension candidates. Maximal degree in co-relation 78207. Up to 8001 conditions per place. [2024-06-03 19:34:00,370 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 482 selfloop transitions, 29 changer transitions 0/519 dead transitions. [2024-06-03 19:34:00,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 519 transitions, 10467 flow [2024-06-03 19:34:00,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:34:00,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:34:00,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 120 transitions. [2024-06-03 19:34:00,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40816326530612246 [2024-06-03 19:34:00,371 INFO L175 Difference]: Start difference. First operand has 286 places, 493 transitions, 9051 flow. Second operand 7 states and 120 transitions. [2024-06-03 19:34:00,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 519 transitions, 10467 flow [2024-06-03 19:34:02,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 519 transitions, 10140 flow, removed 107 selfloop flow, removed 5 redundant places. [2024-06-03 19:34:02,262 INFO L231 Difference]: Finished difference. Result has 289 places, 503 transitions, 8986 flow [2024-06-03 19:34:02,262 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8724, PETRI_DIFFERENCE_MINUEND_PLACES=281, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=467, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8986, PETRI_PLACES=289, PETRI_TRANSITIONS=503} [2024-06-03 19:34:02,263 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 246 predicate places. [2024-06-03 19:34:02,263 INFO L495 AbstractCegarLoop]: Abstraction has has 289 places, 503 transitions, 8986 flow [2024-06-03 19:34:02,263 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) [2024-06-03 19:34:02,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:02,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:02,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 19:34:02,263 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:02,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:02,264 INFO L85 PathProgramCache]: Analyzing trace with hash 764018244, now seen corresponding path program 2 times [2024-06-03 19:34:02,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:02,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689084919] [2024-06-03 19:34:02,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:02,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:02,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:02,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:02,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:02,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689084919] [2024-06-03 19:34:02,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689084919] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:02,961 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:02,961 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:34:02,961 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850758764] [2024-06-03 19:34:02,961 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:02,961 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:34:02,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:02,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:34:02,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:34:03,028 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:03,028 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 289 places, 503 transitions, 8986 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) [2024-06-03 19:34:03,028 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:03,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:03,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:05,049 INFO L124 PetriNetUnfolderBase]: 5316/8255 cut-off events. [2024-06-03 19:34:05,049 INFO L125 PetriNetUnfolderBase]: For 868516/868516 co-relation queries the response was YES. [2024-06-03 19:34:05,122 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78593 conditions, 8255 events. 5316/8255 cut-off events. For 868516/868516 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 50009 event pairs, 1419 based on Foata normal form. 3/8251 useless extension candidates. Maximal degree in co-relation 78453. Up to 8087 conditions per place. [2024-06-03 19:34:05,159 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 491 selfloop transitions, 17 changer transitions 0/516 dead transitions. [2024-06-03 19:34:05,160 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 295 places, 516 transitions, 10102 flow [2024-06-03 19:34:05,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:34:05,160 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:34:05,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 108 transitions. [2024-06-03 19:34:05,161 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3673469387755102 [2024-06-03 19:34:05,161 INFO L175 Difference]: Start difference. First operand has 289 places, 503 transitions, 8986 flow. Second operand 7 states and 108 transitions. [2024-06-03 19:34:05,161 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 295 places, 516 transitions, 10102 flow [2024-06-03 19:34:06,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 293 places, 516 transitions, 9984 flow, removed 55 selfloop flow, removed 2 redundant places. [2024-06-03 19:34:06,768 INFO L231 Difference]: Finished difference. Result has 294 places, 506 transitions, 8983 flow [2024-06-03 19:34:06,769 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8868, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=503, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8983, PETRI_PLACES=294, PETRI_TRANSITIONS=506} [2024-06-03 19:34:06,769 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 251 predicate places. [2024-06-03 19:34:06,769 INFO L495 AbstractCegarLoop]: Abstraction has has 294 places, 506 transitions, 8983 flow [2024-06-03 19:34:06,769 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) [2024-06-03 19:34:06,769 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:06,769 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:06,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 19:34:06,770 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:06,770 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:06,770 INFO L85 PathProgramCache]: Analyzing trace with hash -1864685880, now seen corresponding path program 3 times [2024-06-03 19:34:06,770 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:06,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634814544] [2024-06-03 19:34:06,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:06,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:06,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:07,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:07,448 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:07,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634814544] [2024-06-03 19:34:07,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634814544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:07,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:07,448 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:34:07,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853663032] [2024-06-03 19:34:07,448 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:07,449 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:34:07,449 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:07,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:34:07,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:34:07,538 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:34:07,538 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 294 places, 506 transitions, 8983 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) [2024-06-03 19:34:07,538 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:07,538 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:34:07,538 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:09,485 INFO L124 PetriNetUnfolderBase]: 5314/8251 cut-off events. [2024-06-03 19:34:09,486 INFO L125 PetriNetUnfolderBase]: For 882979/882979 co-relation queries the response was YES. [2024-06-03 19:34:09,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78626 conditions, 8251 events. 5314/8251 cut-off events. For 882979/882979 co-relation queries the response was YES. Maximal size of possible extension queue 422. Compared 50030 event pairs, 1418 based on Foata normal form. 2/8246 useless extension candidates. Maximal degree in co-relation 78483. Up to 8076 conditions per place. [2024-06-03 19:34:09,596 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 490 selfloop transitions, 22 changer transitions 0/520 dead transitions. [2024-06-03 19:34:09,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 520 transitions, 10117 flow [2024-06-03 19:34:09,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:34:09,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:34:09,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 111 transitions. [2024-06-03 19:34:09,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37755102040816324 [2024-06-03 19:34:09,598 INFO L175 Difference]: Start difference. First operand has 294 places, 506 transitions, 8983 flow. Second operand 7 states and 111 transitions. [2024-06-03 19:34:09,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 520 transitions, 10117 flow [2024-06-03 19:34:11,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 520 transitions, 10025 flow, removed 29 selfloop flow, removed 5 redundant places. [2024-06-03 19:34:11,399 INFO L231 Difference]: Finished difference. Result has 296 places, 509 transitions, 9021 flow [2024-06-03 19:34:11,400 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8891, PETRI_DIFFERENCE_MINUEND_PLACES=289, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=506, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9021, PETRI_PLACES=296, PETRI_TRANSITIONS=509} [2024-06-03 19:34:11,400 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 253 predicate places. [2024-06-03 19:34:11,400 INFO L495 AbstractCegarLoop]: Abstraction has has 296 places, 509 transitions, 9021 flow [2024-06-03 19:34:11,401 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) [2024-06-03 19:34:11,401 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:11,401 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:11,401 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 19:34:11,401 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)] === [2024-06-03 19:34:11,401 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:11,401 INFO L85 PathProgramCache]: Analyzing trace with hash -2082451090, now seen corresponding path program 1 times [2024-06-03 19:34:11,402 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:11,402 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232196738] [2024-06-03 19:34:11,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:11,402 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:11,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:13,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:13,001 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:13,001 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232196738] [2024-06-03 19:34:13,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232196738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:13,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:13,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:34:13,002 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767783441] [2024-06-03 19:34:13,002 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:13,002 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:34:13,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:13,003 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:34:13,003 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:34:13,104 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:13,104 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 296 places, 509 transitions, 9021 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) [2024-06-03 19:34:13,105 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:13,105 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:13,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:15,305 INFO L124 PetriNetUnfolderBase]: 5578/8555 cut-off events. [2024-06-03 19:34:15,306 INFO L125 PetriNetUnfolderBase]: For 1042032/1042040 co-relation queries the response was YES. [2024-06-03 19:34:15,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83560 conditions, 8555 events. 5578/8555 cut-off events. For 1042032/1042040 co-relation queries the response was YES. Maximal size of possible extension queue 427. Compared 51063 event pairs, 1221 based on Foata normal form. 26/8580 useless extension candidates. Maximal degree in co-relation 83417. Up to 7793 conditions per place. [2024-06-03 19:34:15,426 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 418 selfloop transitions, 137 changer transitions 0/558 dead transitions. [2024-06-03 19:34:15,427 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 306 places, 558 transitions, 10722 flow [2024-06-03 19:34:15,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:34:15,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:34:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 182 transitions. [2024-06-03 19:34:15,428 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3939393939393939 [2024-06-03 19:34:15,428 INFO L175 Difference]: Start difference. First operand has 296 places, 509 transitions, 9021 flow. Second operand 11 states and 182 transitions. [2024-06-03 19:34:15,428 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 306 places, 558 transitions, 10722 flow [2024-06-03 19:34:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 558 transitions, 10618 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 19:34:17,315 INFO L231 Difference]: Finished difference. Result has 302 places, 511 transitions, 9329 flow [2024-06-03 19:34:17,315 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8917, PETRI_DIFFERENCE_MINUEND_PLACES=291, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=509, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=372, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9329, PETRI_PLACES=302, PETRI_TRANSITIONS=511} [2024-06-03 19:34:17,317 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 259 predicate places. [2024-06-03 19:34:17,317 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 511 transitions, 9329 flow [2024-06-03 19:34:17,318 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) [2024-06-03 19:34:17,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:17,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:17,318 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 19:34:17,318 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)] === [2024-06-03 19:34:17,318 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:17,318 INFO L85 PathProgramCache]: Analyzing trace with hash -405199562, now seen corresponding path program 2 times [2024-06-03 19:34:17,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:17,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035616301] [2024-06-03 19:34:17,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:17,319 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:17,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:18,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:18,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:18,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035616301] [2024-06-03 19:34:18,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2035616301] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:18,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:18,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:34:18,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931403608] [2024-06-03 19:34:18,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:18,912 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:34:18,912 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:18,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:34:18,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:34:19,044 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:19,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 511 transitions, 9329 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) [2024-06-03 19:34:19,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:19,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:19,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:21,240 INFO L124 PetriNetUnfolderBase]: 5646/8677 cut-off events. [2024-06-03 19:34:21,240 INFO L125 PetriNetUnfolderBase]: For 1074293/1074297 co-relation queries the response was YES. [2024-06-03 19:34:21,328 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85538 conditions, 8677 events. 5646/8677 cut-off events. For 1074293/1074297 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 52155 event pairs, 1406 based on Foata normal form. 22/8698 useless extension candidates. Maximal degree in co-relation 85394. Up to 8019 conditions per place. [2024-06-03 19:34:21,369 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 431 selfloop transitions, 121 changer transitions 0/555 dead transitions. [2024-06-03 19:34:21,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 555 transitions, 10995 flow [2024-06-03 19:34:21,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:34:21,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:34:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 19:34:21,371 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-03 19:34:21,371 INFO L175 Difference]: Start difference. First operand has 302 places, 511 transitions, 9329 flow. Second operand 10 states and 173 transitions. [2024-06-03 19:34:21,371 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 555 transitions, 10995 flow [2024-06-03 19:34:23,508 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 302 places, 555 transitions, 10617 flow, removed 55 selfloop flow, removed 9 redundant places. [2024-06-03 19:34:23,516 INFO L231 Difference]: Finished difference. Result has 303 places, 513 transitions, 9332 flow [2024-06-03 19:34:23,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8951, PETRI_DIFFERENCE_MINUEND_PLACES=293, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=511, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=119, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=390, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9332, PETRI_PLACES=303, PETRI_TRANSITIONS=513} [2024-06-03 19:34:23,516 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 260 predicate places. [2024-06-03 19:34:23,517 INFO L495 AbstractCegarLoop]: Abstraction has has 303 places, 513 transitions, 9332 flow [2024-06-03 19:34:23,517 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) [2024-06-03 19:34:23,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:23,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:23,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 19:34:23,517 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:23,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:23,518 INFO L85 PathProgramCache]: Analyzing trace with hash -2024243320, now seen corresponding path program 3 times [2024-06-03 19:34:23,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:23,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259064189] [2024-06-03 19:34:23,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:23,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:23,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:24,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:24,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:24,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259064189] [2024-06-03 19:34:24,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [259064189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:24,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:24,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:24,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091376686] [2024-06-03 19:34:24,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:24,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:24,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:24,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:24,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:24,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:24,841 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 303 places, 513 transitions, 9332 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) [2024-06-03 19:34:24,841 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:24,841 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:24,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:27,088 INFO L124 PetriNetUnfolderBase]: 5620/8633 cut-off events. [2024-06-03 19:34:27,088 INFO L125 PetriNetUnfolderBase]: For 1065795/1065803 co-relation queries the response was YES. [2024-06-03 19:34:27,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83690 conditions, 8633 events. 5620/8633 cut-off events. For 1065795/1065803 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51725 event pairs, 1317 based on Foata normal form. 26/8658 useless extension candidates. Maximal degree in co-relation 83545. Up to 7836 conditions per place. [2024-06-03 19:34:27,202 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 407 selfloop transitions, 140 changer transitions 0/550 dead transitions. [2024-06-03 19:34:27,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 311 places, 550 transitions, 10739 flow [2024-06-03 19:34:27,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:34:27,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:34:27,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:34:27,203 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:34:27,203 INFO L175 Difference]: Start difference. First operand has 303 places, 513 transitions, 9332 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:34:27,203 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 311 places, 550 transitions, 10739 flow [2024-06-03 19:34:28,960 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 304 places, 550 transitions, 10351 flow, removed 81 selfloop flow, removed 7 redundant places. [2024-06-03 19:34:28,968 INFO L231 Difference]: Finished difference. Result has 306 places, 515 transitions, 9289 flow [2024-06-03 19:34:28,969 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8944, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=513, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=373, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9289, PETRI_PLACES=306, PETRI_TRANSITIONS=515} [2024-06-03 19:34:28,969 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-03 19:34:28,969 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 515 transitions, 9289 flow [2024-06-03 19:34:28,969 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) [2024-06-03 19:34:28,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:28,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:28,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 19:34:28,970 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)] === [2024-06-03 19:34:28,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:28,970 INFO L85 PathProgramCache]: Analyzing trace with hash -79379753, now seen corresponding path program 1 times [2024-06-03 19:34:28,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:28,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616096438] [2024-06-03 19:34:28,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:28,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:28,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:29,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:29,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:29,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616096438] [2024-06-03 19:34:29,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616096438] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:29,692 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:29,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:34:29,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236803657] [2024-06-03 19:34:29,692 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:29,692 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:34:29,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:29,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:34:29,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:34:29,750 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:29,750 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 515 transitions, 9289 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:29,750 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:29,750 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:29,750 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:31,752 INFO L124 PetriNetUnfolderBase]: 5622/8638 cut-off events. [2024-06-03 19:34:31,752 INFO L125 PetriNetUnfolderBase]: For 1030584/1030588 co-relation queries the response was YES. [2024-06-03 19:34:31,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83278 conditions, 8638 events. 5622/8638 cut-off events. For 1030584/1030588 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51796 event pairs, 1444 based on Foata normal form. 6/8643 useless extension candidates. Maximal degree in co-relation 83131. Up to 8513 conditions per place. [2024-06-03 19:34:31,883 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 494 selfloop transitions, 39 changer transitions 0/536 dead transitions. [2024-06-03 19:34:31,883 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 536 transitions, 10632 flow [2024-06-03 19:34:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:34:31,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:34:31,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 116 transitions. [2024-06-03 19:34:31,884 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3945578231292517 [2024-06-03 19:34:31,885 INFO L175 Difference]: Start difference. First operand has 306 places, 515 transitions, 9289 flow. Second operand 7 states and 116 transitions. [2024-06-03 19:34:31,885 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 536 transitions, 10632 flow [2024-06-03 19:34:33,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 305 places, 536 transitions, 10288 flow, removed 27 selfloop flow, removed 7 redundant places. [2024-06-03 19:34:33,511 INFO L231 Difference]: Finished difference. Result has 306 places, 518 transitions, 9102 flow [2024-06-03 19:34:33,511 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=8949, PETRI_DIFFERENCE_MINUEND_PLACES=299, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=515, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9102, PETRI_PLACES=306, PETRI_TRANSITIONS=518} [2024-06-03 19:34:33,512 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 263 predicate places. [2024-06-03 19:34:33,512 INFO L495 AbstractCegarLoop]: Abstraction has has 306 places, 518 transitions, 9102 flow [2024-06-03 19:34:33,512 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:33,512 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:33,512 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:33,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 19:34:33,512 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)] === [2024-06-03 19:34:33,513 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:33,513 INFO L85 PathProgramCache]: Analyzing trace with hash -73665833, now seen corresponding path program 2 times [2024-06-03 19:34:33,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:33,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641972590] [2024-06-03 19:34:33,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:33,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:33,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:34,271 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:34,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:34,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641972590] [2024-06-03 19:34:34,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [641972590] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:34,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:34,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:34:34,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993874928] [2024-06-03 19:34:34,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:34,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:34:34,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:34,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:34:34,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:34:34,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:34,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 518 transitions, 9102 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:34,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:34,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:34,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:36,406 INFO L124 PetriNetUnfolderBase]: 5627/8645 cut-off events. [2024-06-03 19:34:36,406 INFO L125 PetriNetUnfolderBase]: For 1047824/1047828 co-relation queries the response was YES. [2024-06-03 19:34:36,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82934 conditions, 8645 events. 5627/8645 cut-off events. For 1047824/1047828 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 51835 event pairs, 1442 based on Foata normal form. 5/8649 useless extension candidates. Maximal degree in co-relation 82786. Up to 8561 conditions per place. [2024-06-03 19:34:36,528 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 501 selfloop transitions, 31 changer transitions 0/535 dead transitions. [2024-06-03 19:34:36,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 312 places, 535 transitions, 10285 flow [2024-06-03 19:34:36,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:34:36,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:34:36,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 109 transitions. [2024-06-03 19:34:36,529 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3707482993197279 [2024-06-03 19:34:36,529 INFO L175 Difference]: Start difference. First operand has 306 places, 518 transitions, 9102 flow. Second operand 7 states and 109 transitions. [2024-06-03 19:34:36,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 312 places, 535 transitions, 10285 flow [2024-06-03 19:34:38,641 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 308 places, 535 transitions, 10211 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:38,648 INFO L231 Difference]: Finished difference. Result has 309 places, 521 transitions, 9175 flow [2024-06-03 19:34:38,648 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9030, PETRI_DIFFERENCE_MINUEND_PLACES=302, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=518, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9175, PETRI_PLACES=309, PETRI_TRANSITIONS=521} [2024-06-03 19:34:38,649 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 266 predicate places. [2024-06-03 19:34:38,649 INFO L495 AbstractCegarLoop]: Abstraction has has 309 places, 521 transitions, 9175 flow [2024-06-03 19:34:38,649 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:34:38,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:38,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:38,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 19:34:38,649 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:34:38,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:38,650 INFO L85 PathProgramCache]: Analyzing trace with hash -294971688, now seen corresponding path program 4 times [2024-06-03 19:34:38,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:38,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945886999] [2024-06-03 19:34:38,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:38,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:38,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:39,764 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:39,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:39,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945886999] [2024-06-03 19:34:39,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945886999] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:39,765 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:39,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:34:39,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976440833] [2024-06-03 19:34:39,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:39,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:34:39,766 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:39,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:34:39,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:34:39,941 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:39,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 309 places, 521 transitions, 9175 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) [2024-06-03 19:34:39,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:39,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:39,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:42,184 INFO L124 PetriNetUnfolderBase]: 5695/8759 cut-off events. [2024-06-03 19:34:42,184 INFO L125 PetriNetUnfolderBase]: For 1126952/1126960 co-relation queries the response was YES. [2024-06-03 19:34:42,273 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84468 conditions, 8759 events. 5695/8759 cut-off events. For 1126952/1126960 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52678 event pairs, 1340 based on Foata normal form. 26/8784 useless extension candidates. Maximal degree in co-relation 84319. Up to 7701 conditions per place. [2024-06-03 19:34:42,314 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 415 selfloop transitions, 142 changer transitions 0/560 dead transitions. [2024-06-03 19:34:42,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 317 places, 560 transitions, 10874 flow [2024-06-03 19:34:42,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:34:42,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:34:42,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 157 transitions. [2024-06-03 19:34:42,322 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41534391534391535 [2024-06-03 19:34:42,322 INFO L175 Difference]: Start difference. First operand has 309 places, 521 transitions, 9175 flow. Second operand 9 states and 157 transitions. [2024-06-03 19:34:42,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 317 places, 560 transitions, 10874 flow [2024-06-03 19:34:44,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 312 places, 560 transitions, 10800 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 19:34:44,340 INFO L231 Difference]: Finished difference. Result has 314 places, 524 transitions, 9584 flow [2024-06-03 19:34:44,341 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9101, PETRI_DIFFERENCE_MINUEND_PLACES=304, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=521, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=139, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9584, PETRI_PLACES=314, PETRI_TRANSITIONS=524} [2024-06-03 19:34:44,341 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 271 predicate places. [2024-06-03 19:34:44,341 INFO L495 AbstractCegarLoop]: Abstraction has has 314 places, 524 transitions, 9584 flow [2024-06-03 19:34:44,341 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) [2024-06-03 19:34:44,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:44,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:44,342 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 19:34:44,342 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)] === [2024-06-03 19:34:44,342 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:44,342 INFO L85 PathProgramCache]: Analyzing trace with hash -849650762, now seen corresponding path program 1 times [2024-06-03 19:34:44,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:44,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582562360] [2024-06-03 19:34:44,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:44,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:45,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:45,120 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:45,120 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582562360] [2024-06-03 19:34:45,120 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582562360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:45,120 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:45,120 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:45,120 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [279453688] [2024-06-03 19:34:45,120 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:45,121 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:45,121 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:45,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:45,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:45,222 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:45,222 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 314 places, 524 transitions, 9584 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) [2024-06-03 19:34:45,222 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:47,501 INFO L124 PetriNetUnfolderBase]: 5705/8779 cut-off events. [2024-06-03 19:34:47,502 INFO L125 PetriNetUnfolderBase]: For 1120343/1120347 co-relation queries the response was YES. [2024-06-03 19:34:47,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85790 conditions, 8779 events. 5705/8779 cut-off events. For 1120343/1120347 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52894 event pairs, 1447 based on Foata normal form. 6/8784 useless extension candidates. Maximal degree in co-relation 85639. Up to 8461 conditions per place. [2024-06-03 19:34:47,630 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 448 selfloop transitions, 103 changer transitions 0/554 dead transitions. [2024-06-03 19:34:47,631 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 321 places, 554 transitions, 11007 flow [2024-06-03 19:34:47,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:47,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:47,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 134 transitions. [2024-06-03 19:34:47,632 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39880952380952384 [2024-06-03 19:34:47,632 INFO L175 Difference]: Start difference. First operand has 314 places, 524 transitions, 9584 flow. Second operand 8 states and 134 transitions. [2024-06-03 19:34:47,632 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 321 places, 554 transitions, 11007 flow [2024-06-03 19:34:50,041 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 554 transitions, 10623 flow, removed 66 selfloop flow, removed 6 redundant places. [2024-06-03 19:34:50,049 INFO L231 Difference]: Finished difference. Result has 316 places, 530 transitions, 9515 flow [2024-06-03 19:34:50,049 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9202, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=524, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=100, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=424, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9515, PETRI_PLACES=316, PETRI_TRANSITIONS=530} [2024-06-03 19:34:50,050 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 273 predicate places. [2024-06-03 19:34:50,050 INFO L495 AbstractCegarLoop]: Abstraction has has 316 places, 530 transitions, 9515 flow [2024-06-03 19:34:50,050 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) [2024-06-03 19:34:50,050 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:50,050 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:50,050 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 19:34:50,051 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)] === [2024-06-03 19:34:50,051 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:50,051 INFO L85 PathProgramCache]: Analyzing trace with hash -73657897, now seen corresponding path program 1 times [2024-06-03 19:34:50,051 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:50,051 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445546644] [2024-06-03 19:34:50,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:50,051 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:50,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:50,868 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:50,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:50,869 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445546644] [2024-06-03 19:34:50,869 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445546644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:50,869 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:50,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:50,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905596056] [2024-06-03 19:34:50,870 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:50,870 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:50,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:50,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:50,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:50,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:50,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 316 places, 530 transitions, 9515 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) [2024-06-03 19:34:50,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:50,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:50,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:53,119 INFO L124 PetriNetUnfolderBase]: 5715/8789 cut-off events. [2024-06-03 19:34:53,119 INFO L125 PetriNetUnfolderBase]: For 1105430/1105434 co-relation queries the response was YES. [2024-06-03 19:34:53,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85167 conditions, 8789 events. 5715/8789 cut-off events. For 1105430/1105434 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52957 event pairs, 1466 based on Foata normal form. 6/8794 useless extension candidates. Maximal degree in co-relation 85015. Up to 8669 conditions per place. [2024-06-03 19:34:53,254 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 505 selfloop transitions, 46 changer transitions 0/554 dead transitions. [2024-06-03 19:34:53,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 323 places, 554 transitions, 10943 flow [2024-06-03 19:34:53,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:53,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:53,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:34:53,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:34:53,256 INFO L175 Difference]: Start difference. First operand has 316 places, 530 transitions, 9515 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:34:53,256 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 323 places, 554 transitions, 10943 flow [2024-06-03 19:34:55,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 319 places, 554 transitions, 10824 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:34:55,862 INFO L231 Difference]: Finished difference. Result has 320 places, 536 transitions, 9616 flow [2024-06-03 19:34:55,863 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9396, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=530, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=487, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9616, PETRI_PLACES=320, PETRI_TRANSITIONS=536} [2024-06-03 19:34:55,866 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 277 predicate places. [2024-06-03 19:34:55,866 INFO L495 AbstractCegarLoop]: Abstraction has has 320 places, 536 transitions, 9616 flow [2024-06-03 19:34:55,866 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) [2024-06-03 19:34:55,866 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:34:55,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:34:55,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 19:34:55,866 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)] === [2024-06-03 19:34:55,867 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:34:55,867 INFO L85 PathProgramCache]: Analyzing trace with hash -73658300, now seen corresponding path program 2 times [2024-06-03 19:34:55,867 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:34:55,867 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174622532] [2024-06-03 19:34:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:34:55,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:34:55,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:34:56,632 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:34:56,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:34:56,633 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174622532] [2024-06-03 19:34:56,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [174622532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:34:56,633 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:34:56,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:34:56,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [512987420] [2024-06-03 19:34:56,634 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:34:56,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:34:56,634 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:34:56,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:34:56,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:34:56,690 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:34:56,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 320 places, 536 transitions, 9616 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) [2024-06-03 19:34:56,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:34:56,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:34:56,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:34:59,004 INFO L124 PetriNetUnfolderBase]: 5741/8823 cut-off events. [2024-06-03 19:34:59,005 INFO L125 PetriNetUnfolderBase]: For 1139217/1139225 co-relation queries the response was YES. [2024-06-03 19:34:59,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86111 conditions, 8823 events. 5741/8823 cut-off events. For 1139217/1139225 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53000 event pairs, 1399 based on Foata normal form. 10/8832 useless extension candidates. Maximal degree in co-relation 85957. Up to 8500 conditions per place. [2024-06-03 19:34:59,162 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 451 selfloop transitions, 109 changer transitions 0/563 dead transitions. [2024-06-03 19:34:59,162 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 327 places, 563 transitions, 11185 flow [2024-06-03 19:34:59,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:34:59,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:34:59,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:34:59,163 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:34:59,164 INFO L175 Difference]: Start difference. First operand has 320 places, 536 transitions, 9616 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:34:59,164 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 327 places, 563 transitions, 11185 flow [2024-06-03 19:35:01,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 563 transitions, 11088 flow, removed 33 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:01,808 INFO L231 Difference]: Finished difference. Result has 324 places, 542 transitions, 9815 flow [2024-06-03 19:35:01,809 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9519, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=536, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=433, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9815, PETRI_PLACES=324, PETRI_TRANSITIONS=542} [2024-06-03 19:35:01,809 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 281 predicate places. [2024-06-03 19:35:01,809 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 542 transitions, 9815 flow [2024-06-03 19:35:01,810 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) [2024-06-03 19:35:01,810 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:01,810 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:01,810 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 19:35:01,810 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)] === [2024-06-03 19:35:01,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:01,810 INFO L85 PathProgramCache]: Analyzing trace with hash -840396332, now seen corresponding path program 3 times [2024-06-03 19:35:01,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:01,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426694326] [2024-06-03 19:35:01,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:01,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:01,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:02,705 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:02,705 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:02,705 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426694326] [2024-06-03 19:35:02,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [426694326] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:02,706 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:02,706 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:35:02,706 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568184602] [2024-06-03 19:35:02,706 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:02,706 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:35:02,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:02,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:35:02,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:35:02,777 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:02,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 542 transitions, 9815 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) [2024-06-03 19:35:02,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:02,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:02,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:05,326 INFO L124 PetriNetUnfolderBase]: 5735/8815 cut-off events. [2024-06-03 19:35:05,326 INFO L125 PetriNetUnfolderBase]: For 1159770/1159778 co-relation queries the response was YES. [2024-06-03 19:35:05,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86431 conditions, 8815 events. 5735/8815 cut-off events. For 1159770/1159778 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 52974 event pairs, 1399 based on Foata normal form. 10/8824 useless extension candidates. Maximal degree in co-relation 86275. Up to 8495 conditions per place. [2024-06-03 19:35:05,493 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 464 selfloop transitions, 97 changer transitions 0/564 dead transitions. [2024-06-03 19:35:05,493 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 331 places, 564 transitions, 11173 flow [2024-06-03 19:35:05,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:35:05,494 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:35:05,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:35:05,494 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:35:05,494 INFO L175 Difference]: Start difference. First operand has 324 places, 542 transitions, 9815 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:35:05,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 331 places, 564 transitions, 11173 flow [2024-06-03 19:35:08,736 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 564 transitions, 10981 flow, removed 24 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:08,744 INFO L231 Difference]: Finished difference. Result has 328 places, 542 transitions, 9828 flow [2024-06-03 19:35:08,745 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9623, PETRI_DIFFERENCE_MINUEND_PLACES=320, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9828, PETRI_PLACES=328, PETRI_TRANSITIONS=542} [2024-06-03 19:35:08,745 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-03 19:35:08,745 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 542 transitions, 9828 flow [2024-06-03 19:35:08,745 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) [2024-06-03 19:35:08,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:08,746 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:08,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 19:35:08,746 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)] === [2024-06-03 19:35:08,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:08,746 INFO L85 PathProgramCache]: Analyzing trace with hash 1116730071, now seen corresponding path program 3 times [2024-06-03 19:35:08,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:08,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647081911] [2024-06-03 19:35:08,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:08,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:08,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:09,613 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:09,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:09,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647081911] [2024-06-03 19:35:09,613 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647081911] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:09,614 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:09,614 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:09,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354523981] [2024-06-03 19:35:09,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:09,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:09,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:09,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:09,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:09,678 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:09,678 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 542 transitions, 9828 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:09,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:09,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:09,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:11,883 INFO L124 PetriNetUnfolderBase]: 5745/8832 cut-off events. [2024-06-03 19:35:11,883 INFO L125 PetriNetUnfolderBase]: For 1186159/1186167 co-relation queries the response was YES. [2024-06-03 19:35:11,983 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86884 conditions, 8832 events. 5745/8832 cut-off events. For 1186159/1186167 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53180 event pairs, 1473 based on Foata normal form. 10/8841 useless extension candidates. Maximal degree in co-relation 86727. Up to 8617 conditions per place. [2024-06-03 19:35:12,030 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 499 selfloop transitions, 61 changer transitions 0/563 dead transitions. [2024-06-03 19:35:12,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 563 transitions, 11396 flow [2024-06-03 19:35:12,031 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:12,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:12,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 117 transitions. [2024-06-03 19:35:12,032 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3979591836734694 [2024-06-03 19:35:12,032 INFO L175 Difference]: Start difference. First operand has 328 places, 542 transitions, 9828 flow. Second operand 7 states and 117 transitions. [2024-06-03 19:35:12,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 563 transitions, 11396 flow [2024-06-03 19:35:15,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 563 transitions, 11181 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:15,074 INFO L231 Difference]: Finished difference. Result has 328 places, 546 transitions, 9822 flow [2024-06-03 19:35:15,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9613, PETRI_DIFFERENCE_MINUEND_PLACES=321, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=542, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9822, PETRI_PLACES=328, PETRI_TRANSITIONS=546} [2024-06-03 19:35:15,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 285 predicate places. [2024-06-03 19:35:15,075 INFO L495 AbstractCegarLoop]: Abstraction has has 328 places, 546 transitions, 9822 flow [2024-06-03 19:35:15,076 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:15,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:15,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:15,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 19:35:15,076 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)] === [2024-06-03 19:35:15,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:15,077 INFO L85 PathProgramCache]: Analyzing trace with hash 1128157911, now seen corresponding path program 4 times [2024-06-03 19:35:15,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:15,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749277367] [2024-06-03 19:35:15,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:15,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:15,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:15,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:15,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:15,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749277367] [2024-06-03 19:35:15,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749277367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:15,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:15,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:15,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494203163] [2024-06-03 19:35:15,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:15,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:15,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:15,937 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:15,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:15,977 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:15,977 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 328 places, 546 transitions, 9822 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:15,977 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:15,977 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:15,977 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:18,171 INFO L124 PetriNetUnfolderBase]: 5747/8835 cut-off events. [2024-06-03 19:35:18,171 INFO L125 PetriNetUnfolderBase]: For 1208233/1208241 co-relation queries the response was YES. [2024-06-03 19:35:18,283 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87100 conditions, 8835 events. 5747/8835 cut-off events. For 1208233/1208241 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 53193 event pairs, 1472 based on Foata normal form. 10/8844 useless extension candidates. Maximal degree in co-relation 86942. Up to 8618 conditions per place. [2024-06-03 19:35:18,331 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 492 selfloop transitions, 67 changer transitions 0/562 dead transitions. [2024-06-03 19:35:18,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 562 transitions, 11212 flow [2024-06-03 19:35:18,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:18,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:18,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 113 transitions. [2024-06-03 19:35:18,332 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3843537414965986 [2024-06-03 19:35:18,332 INFO L175 Difference]: Start difference. First operand has 328 places, 546 transitions, 9822 flow. Second operand 7 states and 113 transitions. [2024-06-03 19:35:18,332 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 562 transitions, 11212 flow [2024-06-03 19:35:21,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 330 places, 562 transitions, 11097 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:21,454 INFO L231 Difference]: Finished difference. Result has 331 places, 549 transitions, 9920 flow [2024-06-03 19:35:21,454 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9709, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9920, PETRI_PLACES=331, PETRI_TRANSITIONS=549} [2024-06-03 19:35:21,455 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 288 predicate places. [2024-06-03 19:35:21,455 INFO L495 AbstractCegarLoop]: Abstraction has has 331 places, 549 transitions, 9920 flow [2024-06-03 19:35:21,455 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:21,455 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:21,455 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:21,455 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 19:35:21,456 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:21,456 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:21,456 INFO L85 PathProgramCache]: Analyzing trace with hash -1487625356, now seen corresponding path program 5 times [2024-06-03 19:35:21,456 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:21,456 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377081207] [2024-06-03 19:35:21,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:21,457 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:21,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:23,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:23,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377081207] [2024-06-03 19:35:23,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377081207] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:23,077 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:23,077 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:35:23,077 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92317929] [2024-06-03 19:35:23,077 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:23,078 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:35:23,078 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:35:23,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:35:23,180 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:23,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 331 places, 549 transitions, 9920 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) [2024-06-03 19:35:23,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:23,181 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:23,181 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:25,593 INFO L124 PetriNetUnfolderBase]: 5714/8784 cut-off events. [2024-06-03 19:35:25,594 INFO L125 PetriNetUnfolderBase]: For 1240982/1240994 co-relation queries the response was YES. [2024-06-03 19:35:25,717 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85746 conditions, 8784 events. 5714/8784 cut-off events. For 1240982/1240994 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 52942 event pairs, 1177 based on Foata normal form. 30/8813 useless extension candidates. Maximal degree in co-relation 85587. Up to 7280 conditions per place. [2024-06-03 19:35:25,768 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 372 selfloop transitions, 217 changer transitions 0/592 dead transitions. [2024-06-03 19:35:25,768 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 592 transitions, 11438 flow [2024-06-03 19:35:25,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:35:25,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:35:25,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 183 transitions. [2024-06-03 19:35:25,771 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4357142857142857 [2024-06-03 19:35:25,771 INFO L175 Difference]: Start difference. First operand has 331 places, 549 transitions, 9920 flow. Second operand 10 states and 183 transitions. [2024-06-03 19:35:25,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 592 transitions, 11438 flow [2024-06-03 19:35:28,894 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 592 transitions, 11273 flow, removed 38 selfloop flow, removed 4 redundant places. [2024-06-03 19:35:28,921 INFO L231 Difference]: Finished difference. Result has 337 places, 549 transitions, 10196 flow [2024-06-03 19:35:28,927 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9755, PETRI_DIFFERENCE_MINUEND_PLACES=327, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10196, PETRI_PLACES=337, PETRI_TRANSITIONS=549} [2024-06-03 19:35:28,927 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 294 predicate places. [2024-06-03 19:35:28,928 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 549 transitions, 10196 flow [2024-06-03 19:35:28,928 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) [2024-06-03 19:35:28,928 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:28,928 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:28,928 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 19:35:28,929 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:28,929 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:28,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1090187526, now seen corresponding path program 6 times [2024-06-03 19:35:28,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:28,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141843579] [2024-06-03 19:35:28,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:28,929 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:28,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:30,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:30,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141843579] [2024-06-03 19:35:30,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141843579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:30,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:30,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:35:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196968838] [2024-06-03 19:35:30,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:30,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:35:30,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:30,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:35:30,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:35:30,405 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:30,407 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 549 transitions, 10196 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) [2024-06-03 19:35:30,407 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:30,407 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:30,407 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:32,876 INFO L124 PetriNetUnfolderBase]: 5782/8900 cut-off events. [2024-06-03 19:35:32,877 INFO L125 PetriNetUnfolderBase]: For 1266951/1266963 co-relation queries the response was YES. [2024-06-03 19:35:32,990 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87595 conditions, 8900 events. 5782/8900 cut-off events. For 1266951/1266963 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53640 event pairs, 1265 based on Foata normal form. 30/8929 useless extension candidates. Maximal degree in co-relation 87435. Up to 7369 conditions per place. [2024-06-03 19:35:33,038 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 401 selfloop transitions, 191 changer transitions 0/595 dead transitions. [2024-06-03 19:35:33,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 595 transitions, 11994 flow [2024-06-03 19:35:33,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:35:33,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:35:33,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 184 transitions. [2024-06-03 19:35:33,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2024-06-03 19:35:33,040 INFO L175 Difference]: Start difference. First operand has 337 places, 549 transitions, 10196 flow. Second operand 10 states and 184 transitions. [2024-06-03 19:35:33,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 595 transitions, 11994 flow [2024-06-03 19:35:36,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 337 places, 595 transitions, 11522 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 19:35:36,382 INFO L231 Difference]: Finished difference. Result has 338 places, 551 transitions, 10225 flow [2024-06-03 19:35:36,383 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9724, PETRI_DIFFERENCE_MINUEND_PLACES=328, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10225, PETRI_PLACES=338, PETRI_TRANSITIONS=551} [2024-06-03 19:35:36,383 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 295 predicate places. [2024-06-03 19:35:36,383 INFO L495 AbstractCegarLoop]: Abstraction has has 338 places, 551 transitions, 10225 flow [2024-06-03 19:35:36,383 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) [2024-06-03 19:35:36,384 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:36,384 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:36,384 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 19:35:36,385 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:36,386 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:36,386 INFO L85 PathProgramCache]: Analyzing trace with hash 919485096, now seen corresponding path program 7 times [2024-06-03 19:35:36,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:36,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773519723] [2024-06-03 19:35:36,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:36,387 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:36,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:37,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:37,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:37,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773519723] [2024-06-03 19:35:37,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773519723] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:37,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:37,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:35:37,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334427294] [2024-06-03 19:35:37,894 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:37,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:35:37,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:37,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:35:37,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:35:38,011 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:38,011 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 551 transitions, 10225 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) [2024-06-03 19:35:38,011 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:38,011 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:38,011 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:40,541 INFO L124 PetriNetUnfolderBase]: 5756/8862 cut-off events. [2024-06-03 19:35:40,541 INFO L125 PetriNetUnfolderBase]: For 1244477/1244489 co-relation queries the response was YES. [2024-06-03 19:35:40,636 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86081 conditions, 8862 events. 5756/8862 cut-off events. For 1244477/1244489 co-relation queries the response was YES. Maximal size of possible extension queue 438. Compared 53473 event pairs, 1291 based on Foata normal form. 30/8891 useless extension candidates. Maximal degree in co-relation 85920. Up to 7787 conditions per place. [2024-06-03 19:35:40,680 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 420 selfloop transitions, 165 changer transitions 0/588 dead transitions. [2024-06-03 19:35:40,680 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 588 transitions, 11896 flow [2024-06-03 19:35:40,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:35:40,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:35:40,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:35:40,682 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 19:35:40,682 INFO L175 Difference]: Start difference. First operand has 338 places, 551 transitions, 10225 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:35:40,682 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 588 transitions, 11896 flow [2024-06-03 19:35:44,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 338 places, 588 transitions, 11363 flow, removed 75 selfloop flow, removed 8 redundant places. [2024-06-03 19:35:44,450 INFO L231 Difference]: Finished difference. Result has 340 places, 553 transitions, 10085 flow [2024-06-03 19:35:44,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9696, PETRI_DIFFERENCE_MINUEND_PLACES=330, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=551, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=163, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=386, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10085, PETRI_PLACES=340, PETRI_TRANSITIONS=553} [2024-06-03 19:35:44,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 297 predicate places. [2024-06-03 19:35:44,451 INFO L495 AbstractCegarLoop]: Abstraction has has 340 places, 553 transitions, 10085 flow [2024-06-03 19:35:44,452 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) [2024-06-03 19:35:44,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:44,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:44,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 19:35:44,452 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:35:44,453 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:44,453 INFO L85 PathProgramCache]: Analyzing trace with hash 919369776, now seen corresponding path program 8 times [2024-06-03 19:35:44,453 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:44,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [756076769] [2024-06-03 19:35:44,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:44,454 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:44,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [756076769] [2024-06-03 19:35:46,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [756076769] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:46,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:46,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:35:46,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735118765] [2024-06-03 19:35:46,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:46,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:35:46,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:46,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:35:46,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:35:46,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:46,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 340 places, 553 transitions, 10085 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) [2024-06-03 19:35:46,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:46,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:46,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:48,678 INFO L124 PetriNetUnfolderBase]: 5824/8978 cut-off events. [2024-06-03 19:35:48,678 INFO L125 PetriNetUnfolderBase]: For 1266554/1266566 co-relation queries the response was YES. [2024-06-03 19:35:48,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86625 conditions, 8978 events. 5824/8978 cut-off events. For 1266554/1266566 co-relation queries the response was YES. Maximal size of possible extension queue 444. Compared 54369 event pairs, 1317 based on Foata normal form. 30/9007 useless extension candidates. Maximal degree in co-relation 86462. Up to 7889 conditions per place. [2024-06-03 19:35:48,850 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 430 selfloop transitions, 161 changer transitions 0/594 dead transitions. [2024-06-03 19:35:48,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 348 places, 594 transitions, 12089 flow [2024-06-03 19:35:48,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:35:48,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:35:48,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 160 transitions. [2024-06-03 19:35:48,853 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.42328042328042326 [2024-06-03 19:35:48,853 INFO L175 Difference]: Start difference. First operand has 340 places, 553 transitions, 10085 flow. Second operand 9 states and 160 transitions. [2024-06-03 19:35:48,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 348 places, 594 transitions, 12089 flow [2024-06-03 19:35:52,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 594 transitions, 11691 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 19:35:52,115 INFO L231 Difference]: Finished difference. Result has 343 places, 557 transitions, 10219 flow [2024-06-03 19:35:52,115 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9693, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=157, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=392, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10219, PETRI_PLACES=343, PETRI_TRANSITIONS=557} [2024-06-03 19:35:52,116 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-03 19:35:52,116 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 557 transitions, 10219 flow [2024-06-03 19:35:52,117 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) [2024-06-03 19:35:52,117 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:52,117 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:52,117 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 19:35:52,117 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)] === [2024-06-03 19:35:52,117 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:52,118 INFO L85 PathProgramCache]: Analyzing trace with hash 565349913, now seen corresponding path program 5 times [2024-06-03 19:35:52,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:52,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417805588] [2024-06-03 19:35:52,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:52,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:52,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:52,912 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:52,912 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417805588] [2024-06-03 19:35:52,912 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417805588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:52,912 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:52,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:52,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214193163] [2024-06-03 19:35:52,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:52,913 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:52,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:52,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:52,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:52,969 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:52,969 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 557 transitions, 10219 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:52,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:52,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:52,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:35:55,230 INFO L124 PetriNetUnfolderBase]: 5773/8892 cut-off events. [2024-06-03 19:35:55,230 INFO L125 PetriNetUnfolderBase]: For 1209290/1209298 co-relation queries the response was YES. [2024-06-03 19:35:55,367 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85952 conditions, 8892 events. 5773/8892 cut-off events. For 1209290/1209298 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 53776 event pairs, 1459 based on Foata normal form. 9/8900 useless extension candidates. Maximal degree in co-relation 85787. Up to 8797 conditions per place. [2024-06-03 19:35:55,413 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 526 selfloop transitions, 38 changer transitions 0/567 dead transitions. [2024-06-03 19:35:55,413 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 567 transitions, 11543 flow [2024-06-03 19:35:55,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:35:55,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:35:55,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 105 transitions. [2024-06-03 19:35:55,414 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-03 19:35:55,414 INFO L175 Difference]: Start difference. First operand has 343 places, 557 transitions, 10219 flow. Second operand 7 states and 105 transitions. [2024-06-03 19:35:55,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 567 transitions, 11543 flow [2024-06-03 19:35:59,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 343 places, 567 transitions, 11104 flow, removed 68 selfloop flow, removed 6 redundant places. [2024-06-03 19:35:59,099 INFO L231 Difference]: Finished difference. Result has 344 places, 557 transitions, 9862 flow [2024-06-03 19:35:59,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9780, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=519, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9862, PETRI_PLACES=344, PETRI_TRANSITIONS=557} [2024-06-03 19:35:59,099 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 301 predicate places. [2024-06-03 19:35:59,099 INFO L495 AbstractCegarLoop]: Abstraction has has 344 places, 557 transitions, 9862 flow [2024-06-03 19:35:59,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:59,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:35:59,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:35:59,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 19:35:59,100 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)] === [2024-06-03 19:35:59,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:35:59,101 INFO L85 PathProgramCache]: Analyzing trace with hash -376404329, now seen corresponding path program 6 times [2024-06-03 19:35:59,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:35:59,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1708652629] [2024-06-03 19:35:59,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:35:59,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:35:59,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:35:59,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:35:59,860 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:35:59,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1708652629] [2024-06-03 19:35:59,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1708652629] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:35:59,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:35:59,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:35:59,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565301070] [2024-06-03 19:35:59,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:35:59,876 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:35:59,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:35:59,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:35:59,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:35:59,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:35:59,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 344 places, 557 transitions, 9862 flow. Second operand has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:35:59,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:35:59,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:35:59,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:02,138 INFO L124 PetriNetUnfolderBase]: 5729/8819 cut-off events. [2024-06-03 19:36:02,138 INFO L125 PetriNetUnfolderBase]: For 1212672/1212680 co-relation queries the response was YES. [2024-06-03 19:36:02,248 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84174 conditions, 8819 events. 5729/8819 cut-off events. For 1212672/1212680 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53219 event pairs, 1455 based on Foata normal form. 9/8827 useless extension candidates. Maximal degree in co-relation 84008. Up to 8738 conditions per place. [2024-06-03 19:36:02,293 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 533 selfloop transitions, 30 changer transitions 0/566 dead transitions. [2024-06-03 19:36:02,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 566 transitions, 11016 flow [2024-06-03 19:36:02,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:36:02,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:36:02,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 103 transitions. [2024-06-03 19:36:02,295 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35034013605442177 [2024-06-03 19:36:02,295 INFO L175 Difference]: Start difference. First operand has 344 places, 557 transitions, 9862 flow. Second operand 7 states and 103 transitions. [2024-06-03 19:36:02,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 566 transitions, 11016 flow [2024-06-03 19:36:05,452 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 566 transitions, 10807 flow, removed 13 selfloop flow, removed 8 redundant places. [2024-06-03 19:36:05,460 INFO L231 Difference]: Finished difference. Result has 343 places, 557 transitions, 9719 flow [2024-06-03 19:36:05,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9653, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9719, PETRI_PLACES=343, PETRI_TRANSITIONS=557} [2024-06-03 19:36:05,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-03 19:36:05,461 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 557 transitions, 9719 flow [2024-06-03 19:36:05,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 8.875) internal successors, (71), 8 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:36:05,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:05,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:05,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 19:36:05,462 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)] === [2024-06-03 19:36:05,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash -363496363, now seen corresponding path program 2 times [2024-06-03 19:36:05,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:05,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620431693] [2024-06-03 19:36:05,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:05,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:05,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:06,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620431693] [2024-06-03 19:36:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620431693] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:06,368 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:06,368 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:06,368 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139303057] [2024-06-03 19:36:06,368 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:06,369 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:06,369 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:06,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:06,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:06,449 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:06,449 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 557 transitions, 9719 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) [2024-06-03 19:36:06,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:06,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:06,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:08,812 INFO L124 PetriNetUnfolderBase]: 5739/8838 cut-off events. [2024-06-03 19:36:08,813 INFO L125 PetriNetUnfolderBase]: For 1242825/1242825 co-relation queries the response was YES. [2024-06-03 19:36:08,980 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84470 conditions, 8838 events. 5739/8838 cut-off events. For 1242825/1242825 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 53428 event pairs, 1549 based on Foata normal form. 2/8839 useless extension candidates. Maximal degree in co-relation 84303. Up to 8772 conditions per place. [2024-06-03 19:36:09,026 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 548 selfloop transitions, 20 changer transitions 0/571 dead transitions. [2024-06-03 19:36:09,027 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 571 transitions, 10939 flow [2024-06-03 19:36:09,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:09,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:09,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-03 19:36:09,028 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-03 19:36:09,028 INFO L175 Difference]: Start difference. First operand has 343 places, 557 transitions, 9719 flow. Second operand 8 states and 114 transitions. [2024-06-03 19:36:09,028 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 571 transitions, 10939 flow [2024-06-03 19:36:12,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 571 transitions, 10825 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:36:12,167 INFO L231 Difference]: Finished difference. Result has 343 places, 560 transitions, 9708 flow [2024-06-03 19:36:12,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9605, PETRI_DIFFERENCE_MINUEND_PLACES=335, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=557, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9708, PETRI_PLACES=343, PETRI_TRANSITIONS=560} [2024-06-03 19:36:12,168 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 300 predicate places. [2024-06-03 19:36:12,168 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 560 transitions, 9708 flow [2024-06-03 19:36:12,168 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) [2024-06-03 19:36:12,168 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:12,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:12,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 19:36:12,173 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)] === [2024-06-03 19:36:12,173 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:12,173 INFO L85 PathProgramCache]: Analyzing trace with hash -363509786, now seen corresponding path program 4 times [2024-06-03 19:36:12,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:12,174 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404225465] [2024-06-03 19:36:12,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:12,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:12,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:13,013 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:13,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:13,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404225465] [2024-06-03 19:36:13,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404225465] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:13,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:13,014 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:13,014 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366630075] [2024-06-03 19:36:13,014 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:13,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:13,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:13,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:13,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:13,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:13,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 560 transitions, 9708 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) [2024-06-03 19:36:13,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:13,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:13,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:15,321 INFO L124 PetriNetUnfolderBase]: 5749/8847 cut-off events. [2024-06-03 19:36:15,322 INFO L125 PetriNetUnfolderBase]: For 1270645/1270657 co-relation queries the response was YES. [2024-06-03 19:36:15,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84787 conditions, 8847 events. 5749/8847 cut-off events. For 1270645/1270657 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53370 event pairs, 1399 based on Foata normal form. 14/8860 useless extension candidates. Maximal degree in co-relation 84619. Up to 8520 conditions per place. [2024-06-03 19:36:15,458 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 459 selfloop transitions, 114 changer transitions 0/576 dead transitions. [2024-06-03 19:36:15,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 350 places, 576 transitions, 11105 flow [2024-06-03 19:36:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:36:15,459 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-03 19:36:15,459 INFO L175 Difference]: Start difference. First operand has 343 places, 560 transitions, 9708 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:36:15,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 350 places, 576 transitions, 11105 flow [2024-06-03 19:36:18,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 341 places, 576 transitions, 10982 flow, removed 21 selfloop flow, removed 9 redundant places. [2024-06-03 19:36:18,777 INFO L231 Difference]: Finished difference. Result has 342 places, 563 transitions, 9858 flow [2024-06-03 19:36:18,778 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9585, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=560, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=449, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9858, PETRI_PLACES=342, PETRI_TRANSITIONS=563} [2024-06-03 19:36:18,778 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 299 predicate places. [2024-06-03 19:36:18,778 INFO L495 AbstractCegarLoop]: Abstraction has has 342 places, 563 transitions, 9858 flow [2024-06-03 19:36:18,778 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) [2024-06-03 19:36:18,778 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:18,779 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:18,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 19:36:18,779 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)] === [2024-06-03 19:36:18,779 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:18,779 INFO L85 PathProgramCache]: Analyzing trace with hash -363509383, now seen corresponding path program 3 times [2024-06-03 19:36:18,779 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:18,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393554035] [2024-06-03 19:36:18,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:18,780 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:18,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:19,607 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:19,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:19,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393554035] [2024-06-03 19:36:19,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393554035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:19,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:19,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:19,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164728411] [2024-06-03 19:36:19,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:19,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:19,608 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:19,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:19,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:19,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:19,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 342 places, 563 transitions, 9858 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) [2024-06-03 19:36:19,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:19,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:19,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:22,030 INFO L124 PetriNetUnfolderBase]: 5759/8861 cut-off events. [2024-06-03 19:36:22,031 INFO L125 PetriNetUnfolderBase]: For 1297825/1297833 co-relation queries the response was YES. [2024-06-03 19:36:22,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85394 conditions, 8861 events. 5759/8861 cut-off events. For 1297825/1297833 co-relation queries the response was YES. Maximal size of possible extension queue 441. Compared 53521 event pairs, 1456 based on Foata normal form. 10/8870 useless extension candidates. Maximal degree in co-relation 85227. Up to 8732 conditions per place. [2024-06-03 19:36:22,194 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 525 selfloop transitions, 52 changer transitions 0/580 dead transitions. [2024-06-03 19:36:22,195 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 349 places, 580 transitions, 11286 flow [2024-06-03 19:36:22,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:22,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:22,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 19:36:22,196 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-03 19:36:22,196 INFO L175 Difference]: Start difference. First operand has 342 places, 563 transitions, 9858 flow. Second operand 8 states and 121 transitions. [2024-06-03 19:36:22,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 349 places, 580 transitions, 11286 flow [2024-06-03 19:36:25,270 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 344 places, 580 transitions, 11074 flow, removed 16 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:25,278 INFO L231 Difference]: Finished difference. Result has 345 places, 566 transitions, 9812 flow [2024-06-03 19:36:25,278 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9646, PETRI_DIFFERENCE_MINUEND_PLACES=337, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=563, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9812, PETRI_PLACES=345, PETRI_TRANSITIONS=566} [2024-06-03 19:36:25,279 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 302 predicate places. [2024-06-03 19:36:25,279 INFO L495 AbstractCegarLoop]: Abstraction has has 345 places, 566 transitions, 9812 flow [2024-06-03 19:36:25,279 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) [2024-06-03 19:36:25,279 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:25,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:25,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 19:36:25,280 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)] === [2024-06-03 19:36:25,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:25,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1976417108, now seen corresponding path program 5 times [2024-06-03 19:36:25,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:25,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099957876] [2024-06-03 19:36:25,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:25,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:25,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:26,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:26,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099957876] [2024-06-03 19:36:26,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099957876] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:26,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:26,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:26,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902605561] [2024-06-03 19:36:26,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:26,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:26,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:26,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:26,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:26,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:26,118 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 345 places, 566 transitions, 9812 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) [2024-06-03 19:36:26,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:26,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:26,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:28,558 INFO L124 PetriNetUnfolderBase]: 5769/8875 cut-off events. [2024-06-03 19:36:28,558 INFO L125 PetriNetUnfolderBase]: For 1325155/1325167 co-relation queries the response was YES. [2024-06-03 19:36:28,681 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85606 conditions, 8875 events. 5769/8875 cut-off events. For 1325155/1325167 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53542 event pairs, 1400 based on Foata normal form. 14/8888 useless extension candidates. Maximal degree in co-relation 85438. Up to 8544 conditions per place. [2024-06-03 19:36:28,726 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 484 selfloop transitions, 97 changer transitions 0/584 dead transitions. [2024-06-03 19:36:28,726 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 584 transitions, 11235 flow [2024-06-03 19:36:28,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:28,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:28,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:36:28,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-03 19:36:28,728 INFO L175 Difference]: Start difference. First operand has 345 places, 566 transitions, 9812 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:36:28,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 584 transitions, 11235 flow [2024-06-03 19:36:31,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 347 places, 584 transitions, 11105 flow, removed 26 selfloop flow, removed 5 redundant places. [2024-06-03 19:36:31,795 INFO L231 Difference]: Finished difference. Result has 348 places, 569 transitions, 9917 flow [2024-06-03 19:36:31,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9682, PETRI_DIFFERENCE_MINUEND_PLACES=340, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=94, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9917, PETRI_PLACES=348, PETRI_TRANSITIONS=569} [2024-06-03 19:36:31,796 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 305 predicate places. [2024-06-03 19:36:31,796 INFO L495 AbstractCegarLoop]: Abstraction has has 348 places, 569 transitions, 9917 flow [2024-06-03 19:36:31,796 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) [2024-06-03 19:36:31,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:31,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:31,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 19:36:31,797 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)] === [2024-06-03 19:36:31,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:31,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1976405948, now seen corresponding path program 6 times [2024-06-03 19:36:31,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:31,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604949544] [2024-06-03 19:36:31,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:31,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:31,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:32,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:32,654 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:32,654 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604949544] [2024-06-03 19:36:32,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604949544] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:32,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:32,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:32,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461008677] [2024-06-03 19:36:32,655 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:32,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:32,655 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:32,655 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:32,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:32,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:32,700 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 348 places, 569 transitions, 9917 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) [2024-06-03 19:36:32,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:32,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:32,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:34,948 INFO L124 PetriNetUnfolderBase]: 5763/8867 cut-off events. [2024-06-03 19:36:34,949 INFO L125 PetriNetUnfolderBase]: For 1345280/1345292 co-relation queries the response was YES. [2024-06-03 19:36:35,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85763 conditions, 8867 events. 5763/8867 cut-off events. For 1345280/1345292 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53456 event pairs, 1399 based on Foata normal form. 14/8880 useless extension candidates. Maximal degree in co-relation 85594. Up to 8539 conditions per place. [2024-06-03 19:36:35,098 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 485 selfloop transitions, 96 changer transitions 0/584 dead transitions. [2024-06-03 19:36:35,099 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 584 transitions, 11132 flow [2024-06-03 19:36:35,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:35,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:35,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 125 transitions. [2024-06-03 19:36:35,100 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37202380952380953 [2024-06-03 19:36:35,100 INFO L175 Difference]: Start difference. First operand has 348 places, 569 transitions, 9917 flow. Second operand 8 states and 125 transitions. [2024-06-03 19:36:35,100 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 584 transitions, 11132 flow [2024-06-03 19:36:38,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 584 transitions, 10820 flow, removed 16 selfloop flow, removed 7 redundant places. [2024-06-03 19:36:38,782 INFO L231 Difference]: Finished difference. Result has 349 places, 569 transitions, 9803 flow [2024-06-03 19:36:38,782 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9605, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=96, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=473, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9803, PETRI_PLACES=349, PETRI_TRANSITIONS=569} [2024-06-03 19:36:38,783 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-03 19:36:38,783 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 569 transitions, 9803 flow [2024-06-03 19:36:38,783 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) [2024-06-03 19:36:38,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:38,784 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:38,784 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 19:36:38,784 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)] === [2024-06-03 19:36:38,784 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:38,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1976405545, now seen corresponding path program 4 times [2024-06-03 19:36:38,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:38,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [534275054] [2024-06-03 19:36:38,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:38,785 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:38,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:39,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:39,637 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:39,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [534275054] [2024-06-03 19:36:39,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [534275054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:39,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:39,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:36:39,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178921453] [2024-06-03 19:36:39,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:39,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:36:39,637 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:39,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:36:39,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:36:39,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:39,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 569 transitions, 9803 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) [2024-06-03 19:36:39,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:39,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:39,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:41,900 INFO L124 PetriNetUnfolderBase]: 5757/8859 cut-off events. [2024-06-03 19:36:41,900 INFO L125 PetriNetUnfolderBase]: For 1360595/1360603 co-relation queries the response was YES. [2024-06-03 19:36:41,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85761 conditions, 8859 events. 5757/8859 cut-off events. For 1360595/1360603 co-relation queries the response was YES. Maximal size of possible extension queue 440. Compared 53510 event pairs, 1454 based on Foata normal form. 10/8868 useless extension candidates. Maximal degree in co-relation 85591. Up to 8733 conditions per place. [2024-06-03 19:36:42,038 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 530 selfloop transitions, 49 changer transitions 0/582 dead transitions. [2024-06-03 19:36:42,038 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 356 places, 582 transitions, 11003 flow [2024-06-03 19:36:42,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:36:42,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:36:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 19:36:42,039 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-03 19:36:42,039 INFO L175 Difference]: Start difference. First operand has 349 places, 569 transitions, 9803 flow. Second operand 8 states and 121 transitions. [2024-06-03 19:36:42,039 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 356 places, 582 transitions, 11003 flow [2024-06-03 19:36:45,124 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 348 places, 582 transitions, 10724 flow, removed 15 selfloop flow, removed 8 redundant places. [2024-06-03 19:36:45,131 INFO L231 Difference]: Finished difference. Result has 349 places, 569 transitions, 9628 flow [2024-06-03 19:36:45,132 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9524, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=520, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9628, PETRI_PLACES=349, PETRI_TRANSITIONS=569} [2024-06-03 19:36:45,132 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 306 predicate places. [2024-06-03 19:36:45,132 INFO L495 AbstractCegarLoop]: Abstraction has has 349 places, 569 transitions, 9628 flow [2024-06-03 19:36:45,132 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) [2024-06-03 19:36:45,132 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:45,133 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:45,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 19:36:45,133 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:45,133 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:45,133 INFO L85 PathProgramCache]: Analyzing trace with hash -24183796, now seen corresponding path program 9 times [2024-06-03 19:36:45,133 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:45,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986626363] [2024-06-03 19:36:45,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:45,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:45,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:46,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:46,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:46,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986626363] [2024-06-03 19:36:46,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986626363] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:46,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:46,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2024-06-03 19:36:46,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524353891] [2024-06-03 19:36:46,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:46,428 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-06-03 19:36:46,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:46,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-06-03 19:36:46,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2024-06-03 19:36:46,529 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:46,529 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 349 places, 569 transitions, 9628 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) [2024-06-03 19:36:46,529 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:46,529 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:46,529 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:48,999 INFO L124 PetriNetUnfolderBase]: 5879/9060 cut-off events. [2024-06-03 19:36:49,000 INFO L125 PetriNetUnfolderBase]: For 1452772/1452780 co-relation queries the response was YES. [2024-06-03 19:36:49,101 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87407 conditions, 9060 events. 5879/9060 cut-off events. For 1452772/1452780 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 54984 event pairs, 1293 based on Foata normal form. 26/9085 useless extension candidates. Maximal degree in co-relation 87236. Up to 8242 conditions per place. [2024-06-03 19:36:49,471 INFO L140 encePairwiseOnDemand]: 28/42 looper letters, 486 selfloop transitions, 140 changer transitions 0/629 dead transitions. [2024-06-03 19:36:49,471 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 629 transitions, 11639 flow [2024-06-03 19:36:49,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 19:36:49,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 19:36:49,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 190 transitions. [2024-06-03 19:36:49,472 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41125541125541126 [2024-06-03 19:36:49,472 INFO L175 Difference]: Start difference. First operand has 349 places, 569 transitions, 9628 flow. Second operand 11 states and 190 transitions. [2024-06-03 19:36:49,472 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 629 transitions, 11639 flow [2024-06-03 19:36:52,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 629 transitions, 11485 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-06-03 19:36:52,662 INFO L231 Difference]: Finished difference. Result has 352 places, 573 transitions, 9933 flow [2024-06-03 19:36:52,663 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9477, PETRI_DIFFERENCE_MINUEND_PLACES=341, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=569, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=136, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=429, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=9933, PETRI_PLACES=352, PETRI_TRANSITIONS=573} [2024-06-03 19:36:52,663 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 309 predicate places. [2024-06-03 19:36:52,663 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 573 transitions, 9933 flow [2024-06-03 19:36:52,663 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) [2024-06-03 19:36:52,664 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:36:52,664 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:36:52,664 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 19:36:52,664 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:36:52,665 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:36:52,665 INFO L85 PathProgramCache]: Analyzing trace with hash -1397486968, now seen corresponding path program 10 times [2024-06-03 19:36:52,665 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:36:52,665 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719398748] [2024-06-03 19:36:52,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:36:52,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:36:52,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:36:53,756 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:36:53,756 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:36:53,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719398748] [2024-06-03 19:36:53,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719398748] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:36:53,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:36:53,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:36:53,757 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112055334] [2024-06-03 19:36:53,757 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:36:53,757 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:36:53,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:36:53,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:36:53,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=86, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:36:53,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:36:53,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 573 transitions, 9933 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) [2024-06-03 19:36:53,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:36:53,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:36:53,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:36:56,267 INFO L124 PetriNetUnfolderBase]: 6001/9268 cut-off events. [2024-06-03 19:36:56,267 INFO L125 PetriNetUnfolderBase]: For 1502072/1502080 co-relation queries the response was YES. [2024-06-03 19:36:56,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89955 conditions, 9268 events. 6001/9268 cut-off events. For 1502072/1502080 co-relation queries the response was YES. Maximal size of possible extension queue 462. Compared 56652 event pairs, 1274 based on Foata normal form. 26/9293 useless extension candidates. Maximal degree in co-relation 89783. Up to 7971 conditions per place. [2024-06-03 19:36:56,401 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 452 selfloop transitions, 170 changer transitions 0/625 dead transitions. [2024-06-03 19:36:56,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 625 transitions, 11901 flow [2024-06-03 19:36:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:36:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:36:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 173 transitions. [2024-06-03 19:36:56,403 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4119047619047619 [2024-06-03 19:36:56,403 INFO L175 Difference]: Start difference. First operand has 352 places, 573 transitions, 9933 flow. Second operand 10 states and 173 transitions. [2024-06-03 19:36:56,403 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 625 transitions, 11901 flow [2024-06-03 19:37:00,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 352 places, 625 transitions, 11513 flow, removed 58 selfloop flow, removed 9 redundant places. [2024-06-03 19:37:00,230 INFO L231 Difference]: Finished difference. Result has 353 places, 577 transitions, 10076 flow [2024-06-03 19:37:00,230 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9545, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=573, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=403, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10076, PETRI_PLACES=353, PETRI_TRANSITIONS=577} [2024-06-03 19:37:00,231 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 310 predicate places. [2024-06-03 19:37:00,231 INFO L495 AbstractCegarLoop]: Abstraction has has 353 places, 577 transitions, 10076 flow [2024-06-03 19:37:00,231 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) [2024-06-03 19:37:00,231 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:00,231 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:00,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 19:37:00,232 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 19:37:00,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:00,232 INFO L85 PathProgramCache]: Analyzing trace with hash -274499366, now seen corresponding path program 11 times [2024-06-03 19:37:00,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:00,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089834770] [2024-06-03 19:37:00,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:00,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:00,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:01,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:01,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089834770] [2024-06-03 19:37:01,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089834770] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:01,250 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:01,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 19:37:01,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92219743] [2024-06-03 19:37:01,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:01,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 19:37:01,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:01,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 19:37:01,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2024-06-03 19:37:01,399 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:37:01,399 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 353 places, 577 transitions, 10076 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) [2024-06-03 19:37:01,399 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:01,399 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:37:01,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:03,741 INFO L124 PetriNetUnfolderBase]: 6170/9549 cut-off events. [2024-06-03 19:37:03,742 INFO L125 PetriNetUnfolderBase]: For 1503854/1503862 co-relation queries the response was YES. [2024-06-03 19:37:03,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91389 conditions, 9549 events. 6170/9549 cut-off events. For 1503854/1503862 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 58641 event pairs, 989 based on Foata normal form. 26/9574 useless extension candidates. Maximal degree in co-relation 91216. Up to 8443 conditions per place. [2024-06-03 19:37:03,889 INFO L140 encePairwiseOnDemand]: 29/42 looper letters, 468 selfloop transitions, 156 changer transitions 0/627 dead transitions. [2024-06-03 19:37:03,889 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 627 transitions, 12168 flow [2024-06-03 19:37:03,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 19:37:03,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 19:37:03,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 170 transitions. [2024-06-03 19:37:03,890 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:37:03,890 INFO L175 Difference]: Start difference. First operand has 353 places, 577 transitions, 10076 flow. Second operand 10 states and 170 transitions. [2024-06-03 19:37:03,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 627 transitions, 12168 flow [2024-06-03 19:37:07,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 627 transitions, 11616 flow, removed 127 selfloop flow, removed 7 redundant places. [2024-06-03 19:37:07,937 INFO L231 Difference]: Finished difference. Result has 355 places, 583 transitions, 10002 flow [2024-06-03 19:37:07,937 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9530, PETRI_DIFFERENCE_MINUEND_PLACES=345, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=149, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10002, PETRI_PLACES=355, PETRI_TRANSITIONS=583} [2024-06-03 19:37:07,937 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 19:37:07,937 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 583 transitions, 10002 flow [2024-06-03 19:37:07,937 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) [2024-06-03 19:37:07,938 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:07,938 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:07,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 19:37:07,938 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)] === [2024-06-03 19:37:07,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:07,938 INFO L85 PathProgramCache]: Analyzing trace with hash 2084158361, now seen corresponding path program 1 times [2024-06-03 19:37:07,938 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:07,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626178023] [2024-06-03 19:37:07,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:07,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:07,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:08,792 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:08,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:08,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626178023] [2024-06-03 19:37:08,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626178023] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:08,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:08,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:08,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528167438] [2024-06-03 19:37:08,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:08,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:08,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:08,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:08,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:08,854 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:08,854 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 583 transitions, 10002 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:08,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:08,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:08,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:10,996 INFO L124 PetriNetUnfolderBase]: 5996/9383 cut-off events. [2024-06-03 19:37:10,997 INFO L125 PetriNetUnfolderBase]: For 1272795/1272799 co-relation queries the response was YES. [2024-06-03 19:37:11,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85805 conditions, 9383 events. 5996/9383 cut-off events. For 1272795/1272799 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 58793 event pairs, 1766 based on Foata normal form. 1/9373 useless extension candidates. Maximal degree in co-relation 85631. Up to 9186 conditions per place. [2024-06-03 19:37:11,152 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 558 selfloop transitions, 27 changer transitions 0/599 dead transitions. [2024-06-03 19:37:11,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 599 transitions, 11230 flow [2024-06-03 19:37:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:11,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:11,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:37:11,153 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-03 19:37:11,153 INFO L175 Difference]: Start difference. First operand has 355 places, 583 transitions, 10002 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:37:11,153 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 599 transitions, 11230 flow [2024-06-03 19:37:14,369 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 599 transitions, 10814 flow, removed 58 selfloop flow, removed 8 redundant places. [2024-06-03 19:37:14,376 INFO L231 Difference]: Finished difference. Result has 355 places, 583 transitions, 9647 flow [2024-06-03 19:37:14,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9586, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9647, PETRI_PLACES=355, PETRI_TRANSITIONS=583} [2024-06-03 19:37:14,377 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 19:37:14,377 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 583 transitions, 9647 flow [2024-06-03 19:37:14,377 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:14,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:14,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:14,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 19:37:14,378 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)] === [2024-06-03 19:37:14,378 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:14,378 INFO L85 PathProgramCache]: Analyzing trace with hash 1128171582, now seen corresponding path program 1 times [2024-06-03 19:37:14,378 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:14,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413733377] [2024-06-03 19:37:14,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:14,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:14,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:15,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:15,194 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:15,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413733377] [2024-06-03 19:37:15,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413733377] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:15,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:15,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:15,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020836532] [2024-06-03 19:37:15,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:15,196 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:15,196 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:15,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:15,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:15,261 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:15,261 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 583 transitions, 9647 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) [2024-06-03 19:37:15,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:15,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:15,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:17,513 INFO L124 PetriNetUnfolderBase]: 5988/9372 cut-off events. [2024-06-03 19:37:17,513 INFO L125 PetriNetUnfolderBase]: For 1275776/1275780 co-relation queries the response was YES. [2024-06-03 19:37:17,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84461 conditions, 9372 events. 5988/9372 cut-off events. For 1275776/1275780 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 58668 event pairs, 1764 based on Foata normal form. 2/9365 useless extension candidates. Maximal degree in co-relation 84286. Up to 9133 conditions per place. [2024-06-03 19:37:17,683 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 553 selfloop transitions, 36 changer transitions 0/603 dead transitions. [2024-06-03 19:37:17,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 362 places, 603 transitions, 11127 flow [2024-06-03 19:37:17,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:17,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:17,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:37:17,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:37:17,685 INFO L175 Difference]: Start difference. First operand has 355 places, 583 transitions, 9647 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:37:17,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 362 places, 603 transitions, 11127 flow [2024-06-03 19:37:22,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 603 transitions, 10875 flow, removed 17 selfloop flow, removed 8 redundant places. [2024-06-03 19:37:22,172 INFO L231 Difference]: Finished difference. Result has 355 places, 586 transitions, 9531 flow [2024-06-03 19:37:22,173 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9397, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=583, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=550, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9531, PETRI_PLACES=355, PETRI_TRANSITIONS=586} [2024-06-03 19:37:22,173 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 312 predicate places. [2024-06-03 19:37:22,173 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 586 transitions, 9531 flow [2024-06-03 19:37:22,173 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) [2024-06-03 19:37:22,173 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:22,174 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:22,174 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 19:37:22,174 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)] === [2024-06-03 19:37:22,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:22,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1128166002, now seen corresponding path program 2 times [2024-06-03 19:37:22,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:22,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447574022] [2024-06-03 19:37:22,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:22,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:22,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:22,949 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:22,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:22,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447574022] [2024-06-03 19:37:22,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1447574022] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:22,950 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:22,950 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 19:37:22,950 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629646273] [2024-06-03 19:37:22,950 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:22,950 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 19:37:22,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:22,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 19:37:22,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 19:37:23,007 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:23,008 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 586 transitions, 9531 flow. Second operand has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:23,008 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:23,008 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:23,008 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:25,368 INFO L124 PetriNetUnfolderBase]: 5993/9381 cut-off events. [2024-06-03 19:37:25,368 INFO L125 PetriNetUnfolderBase]: For 1275075/1275079 co-relation queries the response was YES. [2024-06-03 19:37:25,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84153 conditions, 9381 events. 5993/9381 cut-off events. For 1275075/1275079 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 58721 event pairs, 1763 based on Foata normal form. 2/9374 useless extension candidates. Maximal degree in co-relation 83978. Up to 9141 conditions per place. [2024-06-03 19:37:25,494 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 552 selfloop transitions, 42 changer transitions 0/608 dead transitions. [2024-06-03 19:37:25,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 361 places, 608 transitions, 11039 flow [2024-06-03 19:37:25,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 19:37:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 19:37:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 123 transitions. [2024-06-03 19:37:25,495 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41836734693877553 [2024-06-03 19:37:25,495 INFO L175 Difference]: Start difference. First operand has 355 places, 586 transitions, 9531 flow. Second operand 7 states and 123 transitions. [2024-06-03 19:37:25,495 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 361 places, 608 transitions, 11039 flow [2024-06-03 19:37:29,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 608 transitions, 10917 flow, removed 22 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:29,125 INFO L231 Difference]: Finished difference. Result has 356 places, 589 transitions, 9561 flow [2024-06-03 19:37:29,126 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9415, PETRI_DIFFERENCE_MINUEND_PLACES=349, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=9561, PETRI_PLACES=356, PETRI_TRANSITIONS=589} [2024-06-03 19:37:29,126 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 313 predicate places. [2024-06-03 19:37:29,126 INFO L495 AbstractCegarLoop]: Abstraction has has 356 places, 589 transitions, 9561 flow [2024-06-03 19:37:29,126 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 10.0) internal successors, (80), 8 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 19:37:29,126 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:29,126 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:29,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 19:37:29,127 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)] === [2024-06-03 19:37:29,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:29,127 INFO L85 PathProgramCache]: Analyzing trace with hash -1372241940, now seen corresponding path program 3 times [2024-06-03 19:37:29,127 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:29,127 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641419471] [2024-06-03 19:37:29,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:29,127 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:29,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:29,872 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:29,872 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:29,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641419471] [2024-06-03 19:37:29,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641419471] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:29,873 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:29,873 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:29,873 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937795716] [2024-06-03 19:37:29,873 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:29,874 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:29,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:29,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:29,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:29,932 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:29,932 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 356 places, 589 transitions, 9561 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) [2024-06-03 19:37:29,933 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:29,933 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:29,933 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:32,194 INFO L124 PetriNetUnfolderBase]: 6003/9395 cut-off events. [2024-06-03 19:37:32,195 INFO L125 PetriNetUnfolderBase]: For 1303188/1303192 co-relation queries the response was YES. [2024-06-03 19:37:32,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84495 conditions, 9395 events. 6003/9395 cut-off events. For 1303188/1303192 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 58878 event pairs, 1764 based on Foata normal form. 2/9386 useless extension candidates. Maximal degree in co-relation 84319. Up to 9217 conditions per place. [2024-06-03 19:37:32,334 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 566 selfloop transitions, 25 changer transitions 0/605 dead transitions. [2024-06-03 19:37:32,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 605 transitions, 10847 flow [2024-06-03 19:37:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:32,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:32,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:37:32,337 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-03 19:37:32,337 INFO L175 Difference]: Start difference. First operand has 356 places, 589 transitions, 9561 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:37:32,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 605 transitions, 10847 flow [2024-06-03 19:37:35,845 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 605 transitions, 10736 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 19:37:35,853 INFO L231 Difference]: Finished difference. Result has 360 places, 592 transitions, 9574 flow [2024-06-03 19:37:35,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9453, PETRI_DIFFERENCE_MINUEND_PLACES=352, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=589, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9574, PETRI_PLACES=360, PETRI_TRANSITIONS=592} [2024-06-03 19:37:35,853 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 317 predicate places. [2024-06-03 19:37:35,853 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 592 transitions, 9574 flow [2024-06-03 19:37:35,854 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) [2024-06-03 19:37:35,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:35,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:35,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 19:37:35,854 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)] === [2024-06-03 19:37:35,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:35,854 INFO L85 PathProgramCache]: Analyzing trace with hash -363325088, now seen corresponding path program 4 times [2024-06-03 19:37:35,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:35,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386059350] [2024-06-03 19:37:35,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:35,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:35,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:36,604 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:36,605 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:36,605 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386059350] [2024-06-03 19:37:36,605 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386059350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:36,605 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:36,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:36,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677771102] [2024-06-03 19:37:36,605 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:36,606 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:36,606 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:36,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:36,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:36,681 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 8 out of 42 [2024-06-03 19:37:36,681 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 592 transitions, 9574 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) [2024-06-03 19:37:36,681 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:36,681 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 8 of 42 [2024-06-03 19:37:36,681 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:38,891 INFO L124 PetriNetUnfolderBase]: 5997/9387 cut-off events. [2024-06-03 19:37:38,892 INFO L125 PetriNetUnfolderBase]: For 1316675/1316679 co-relation queries the response was YES. [2024-06-03 19:37:39,024 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84385 conditions, 9387 events. 5997/9387 cut-off events. For 1316675/1316679 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 58790 event pairs, 1765 based on Foata normal form. 2/9378 useless extension candidates. Maximal degree in co-relation 84208. Up to 9218 conditions per place. [2024-06-03 19:37:39,064 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 570 selfloop transitions, 20 changer transitions 0/604 dead transitions. [2024-06-03 19:37:39,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 367 places, 604 transitions, 10792 flow [2024-06-03 19:37:39,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:39,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:39,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 120 transitions. [2024-06-03 19:37:39,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.35714285714285715 [2024-06-03 19:37:39,066 INFO L175 Difference]: Start difference. First operand has 360 places, 592 transitions, 9574 flow. Second operand 8 states and 120 transitions. [2024-06-03 19:37:39,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 367 places, 604 transitions, 10792 flow [2024-06-03 19:37:42,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 604 transitions, 10668 flow, removed 39 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:42,764 INFO L231 Difference]: Finished difference. Result has 362 places, 592 transitions, 9496 flow [2024-06-03 19:37:42,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9450, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=572, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9496, PETRI_PLACES=362, PETRI_TRANSITIONS=592} [2024-06-03 19:37:42,764 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-03 19:37:42,765 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 592 transitions, 9496 flow [2024-06-03 19:37:42,765 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) [2024-06-03 19:37:42,765 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:42,765 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:42,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 19:37:42,765 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)] === [2024-06-03 19:37:42,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:42,766 INFO L85 PathProgramCache]: Analyzing trace with hash -363048041, now seen corresponding path program 1 times [2024-06-03 19:37:42,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:42,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48879095] [2024-06-03 19:37:42,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:42,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:43,729 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:43,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:43,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48879095] [2024-06-03 19:37:43,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48879095] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:43,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:43,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:37:43,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354608236] [2024-06-03 19:37:43,730 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:43,730 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:37:43,730 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:43,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:37:43,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:37:43,819 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:37:43,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 592 transitions, 9496 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) [2024-06-03 19:37:43,819 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:43,819 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:37:43,819 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:46,487 INFO L124 PetriNetUnfolderBase]: 6198/9599 cut-off events. [2024-06-03 19:37:46,487 INFO L125 PetriNetUnfolderBase]: For 1480958/1480958 co-relation queries the response was YES. [2024-06-03 19:37:46,620 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88540 conditions, 9599 events. 6198/9599 cut-off events. For 1480958/1480958 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 59092 event pairs, 1840 based on Foata normal form. 2/9600 useless extension candidates. Maximal degree in co-relation 88362. Up to 9535 conditions per place. [2024-06-03 19:37:46,665 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 583 selfloop transitions, 19 changer transitions 0/605 dead transitions. [2024-06-03 19:37:46,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 605 transitions, 10778 flow [2024-06-03 19:37:46,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:46,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:46,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 112 transitions. [2024-06-03 19:37:46,666 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-06-03 19:37:46,667 INFO L175 Difference]: Start difference. First operand has 362 places, 592 transitions, 9496 flow. Second operand 8 states and 112 transitions. [2024-06-03 19:37:46,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 605 transitions, 10778 flow [2024-06-03 19:37:51,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 605 transitions, 10683 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 19:37:51,144 INFO L231 Difference]: Finished difference. Result has 362 places, 594 transitions, 9494 flow [2024-06-03 19:37:51,145 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9401, PETRI_DIFFERENCE_MINUEND_PLACES=354, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=573, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9494, PETRI_PLACES=362, PETRI_TRANSITIONS=594} [2024-06-03 19:37:51,145 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 319 predicate places. [2024-06-03 19:37:51,145 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 594 transitions, 9494 flow [2024-06-03 19:37:51,145 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) [2024-06-03 19:37:51,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:51,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:51,146 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 19:37:51,146 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)] === [2024-06-03 19:37:51,146 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:51,146 INFO L85 PathProgramCache]: Analyzing trace with hash -2053512793, now seen corresponding path program 1 times [2024-06-03 19:37:51,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:51,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839853767] [2024-06-03 19:37:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:51,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:51,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:37:51,974 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:37:51,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:37:51,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839853767] [2024-06-03 19:37:51,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839853767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:37:51,975 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:37:51,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:37:51,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498120839] [2024-06-03 19:37:51,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:37:51,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:37:51,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:37:51,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:37:51,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:37:52,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:37:52,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 594 transitions, 9494 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) [2024-06-03 19:37:52,076 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:37:52,076 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:37:52,076 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:37:54,690 INFO L124 PetriNetUnfolderBase]: 6202/9596 cut-off events. [2024-06-03 19:37:54,691 INFO L125 PetriNetUnfolderBase]: For 1507834/1507842 co-relation queries the response was YES. [2024-06-03 19:37:54,792 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88781 conditions, 9596 events. 6202/9596 cut-off events. For 1507834/1507842 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 58960 event pairs, 1592 based on Foata normal form. 12/9607 useless extension candidates. Maximal degree in co-relation 88602. Up to 9240 conditions per place. [2024-06-03 19:37:54,835 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 513 selfloop transitions, 110 changer transitions 0/626 dead transitions. [2024-06-03 19:37:54,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 369 places, 626 transitions, 11151 flow [2024-06-03 19:37:54,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:37:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:37:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 136 transitions. [2024-06-03 19:37:54,836 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.40476190476190477 [2024-06-03 19:37:54,836 INFO L175 Difference]: Start difference. First operand has 362 places, 594 transitions, 9494 flow. Second operand 8 states and 136 transitions. [2024-06-03 19:37:54,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 369 places, 626 transitions, 11151 flow [2024-06-03 19:37:59,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 626 transitions, 11074 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 19:37:59,224 INFO L231 Difference]: Finished difference. Result has 364 places, 597 transitions, 9738 flow [2024-06-03 19:37:59,225 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9417, PETRI_DIFFERENCE_MINUEND_PLACES=356, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=594, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=107, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=486, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9738, PETRI_PLACES=364, PETRI_TRANSITIONS=597} [2024-06-03 19:37:59,240 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 321 predicate places. [2024-06-03 19:37:59,240 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 597 transitions, 9738 flow [2024-06-03 19:37:59,240 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) [2024-06-03 19:37:59,240 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:37:59,240 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:37:59,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 19:37:59,241 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)] === [2024-06-03 19:37:59,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:37:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1724320529, now seen corresponding path program 2 times [2024-06-03 19:37:59,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:37:59,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [325120032] [2024-06-03 19:37:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:37:59,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:37:59,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:00,031 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:00,032 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:00,032 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [325120032] [2024-06-03 19:38:00,032 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [325120032] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:00,032 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:00,032 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:00,032 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904999162] [2024-06-03 19:38:00,032 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:00,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:00,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:00,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:00,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:00,132 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:00,132 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 597 transitions, 9738 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) [2024-06-03 19:38:00,132 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:00,132 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:00,132 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:02,559 INFO L124 PetriNetUnfolderBase]: 6212/9610 cut-off events. [2024-06-03 19:38:02,559 INFO L125 PetriNetUnfolderBase]: For 1528906/1528914 co-relation queries the response was YES. [2024-06-03 19:38:02,672 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89536 conditions, 9610 events. 6212/9610 cut-off events. For 1528906/1528914 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 59006 event pairs, 1591 based on Foata normal form. 10/9619 useless extension candidates. Maximal degree in co-relation 89356. Up to 9356 conditions per place. [2024-06-03 19:38:02,712 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 519 selfloop transitions, 103 changer transitions 0/625 dead transitions. [2024-06-03 19:38:02,712 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 371 places, 625 transitions, 11192 flow [2024-06-03 19:38:02,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:02,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:02,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:38:02,713 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:38:02,713 INFO L175 Difference]: Start difference. First operand has 364 places, 597 transitions, 9738 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:38:02,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 371 places, 625 transitions, 11192 flow [2024-06-03 19:38:08,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 366 places, 625 transitions, 10975 flow, removed 12 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:08,237 INFO L231 Difference]: Finished difference. Result has 367 places, 601 transitions, 9850 flow [2024-06-03 19:38:08,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9525, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=597, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=495, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9850, PETRI_PLACES=367, PETRI_TRANSITIONS=601} [2024-06-03 19:38:08,238 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 324 predicate places. [2024-06-03 19:38:08,238 INFO L495 AbstractCegarLoop]: Abstraction has has 367 places, 601 transitions, 9850 flow [2024-06-03 19:38:08,239 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) [2024-06-03 19:38:08,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:08,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:08,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 19:38:08,239 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)] === [2024-06-03 19:38:08,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:08,240 INFO L85 PathProgramCache]: Analyzing trace with hash 1833897779, now seen corresponding path program 3 times [2024-06-03 19:38:08,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:08,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794031449] [2024-06-03 19:38:08,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:08,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:08,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:09,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:09,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:09,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794031449] [2024-06-03 19:38:09,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794031449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:09,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:09,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:09,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [341398284] [2024-06-03 19:38:09,061 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:09,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:09,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:09,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:09,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:09,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:09,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 367 places, 601 transitions, 9850 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) [2024-06-03 19:38:09,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:09,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:09,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:11,433 INFO L124 PetriNetUnfolderBase]: 6242/9653 cut-off events. [2024-06-03 19:38:11,433 INFO L125 PetriNetUnfolderBase]: For 1579255/1579259 co-relation queries the response was YES. [2024-06-03 19:38:11,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90201 conditions, 9653 events. 6242/9653 cut-off events. For 1579255/1579259 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59266 event pairs, 1585 based on Foata normal form. 10/9662 useless extension candidates. Maximal degree in co-relation 90020. Up to 8888 conditions per place. [2024-06-03 19:38:11,591 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 483 selfloop transitions, 148 changer transitions 0/634 dead transitions. [2024-06-03 19:38:11,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 634 transitions, 11750 flow [2024-06-03 19:38:11,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:11,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:11,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 141 transitions. [2024-06-03 19:38:11,592 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41964285714285715 [2024-06-03 19:38:11,592 INFO L175 Difference]: Start difference. First operand has 367 places, 601 transitions, 9850 flow. Second operand 8 states and 141 transitions. [2024-06-03 19:38:11,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 634 transitions, 11750 flow [2024-06-03 19:38:16,680 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 634 transitions, 11595 flow, removed 14 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:16,687 INFO L231 Difference]: Finished difference. Result has 371 places, 608 transitions, 10150 flow [2024-06-03 19:38:16,688 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9695, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10150, PETRI_PLACES=371, PETRI_TRANSITIONS=608} [2024-06-03 19:38:16,688 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 328 predicate places. [2024-06-03 19:38:16,688 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 608 transitions, 10150 flow [2024-06-03 19:38:16,688 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) [2024-06-03 19:38:16,688 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:16,689 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:16,689 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 19:38:16,689 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)] === [2024-06-03 19:38:16,689 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:16,689 INFO L85 PathProgramCache]: Analyzing trace with hash -1697961531, now seen corresponding path program 1 times [2024-06-03 19:38:16,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:16,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117748720] [2024-06-03 19:38:16,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:16,690 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:16,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:17,412 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:17,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:17,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117748720] [2024-06-03 19:38:17,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117748720] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:17,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:17,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:17,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [820661339] [2024-06-03 19:38:17,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:17,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:17,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:17,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:17,415 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:17,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:17,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 608 transitions, 10150 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) [2024-06-03 19:38:17,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:17,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:17,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:19,927 INFO L124 PetriNetUnfolderBase]: 6268/9691 cut-off events. [2024-06-03 19:38:19,928 INFO L125 PetriNetUnfolderBase]: For 1602399/1602403 co-relation queries the response was YES. [2024-06-03 19:38:20,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91443 conditions, 9691 events. 6268/9691 cut-off events. For 1602399/1602403 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 59598 event pairs, 1716 based on Foata normal form. 6/9696 useless extension candidates. Maximal degree in co-relation 91261. Up to 9522 conditions per place. [2024-06-03 19:38:20,111 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 580 selfloop transitions, 52 changer transitions 0/635 dead transitions. [2024-06-03 19:38:20,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 378 places, 635 transitions, 11926 flow [2024-06-03 19:38:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:20,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:20,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 130 transitions. [2024-06-03 19:38:20,113 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3869047619047619 [2024-06-03 19:38:20,113 INFO L175 Difference]: Start difference. First operand has 371 places, 608 transitions, 10150 flow. Second operand 8 states and 130 transitions. [2024-06-03 19:38:20,113 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 378 places, 635 transitions, 11926 flow [2024-06-03 19:38:25,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 373 places, 635 transitions, 11629 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:25,451 INFO L231 Difference]: Finished difference. Result has 374 places, 615 transitions, 10168 flow [2024-06-03 19:38:25,451 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9853, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=608, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10168, PETRI_PLACES=374, PETRI_TRANSITIONS=615} [2024-06-03 19:38:25,451 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 331 predicate places. [2024-06-03 19:38:25,451 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 615 transitions, 10168 flow [2024-06-03 19:38:25,451 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) [2024-06-03 19:38:25,452 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:25,452 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:25,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 19:38:25,452 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)] === [2024-06-03 19:38:25,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:25,452 INFO L85 PathProgramCache]: Analyzing trace with hash 1834196309, now seen corresponding path program 4 times [2024-06-03 19:38:25,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:25,453 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964804191] [2024-06-03 19:38:25,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:25,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:25,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:26,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:26,241 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:26,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964804191] [2024-06-03 19:38:26,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964804191] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:26,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:26,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:26,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841615266] [2024-06-03 19:38:26,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:26,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:26,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:26,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:26,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:26,301 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:26,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 615 transitions, 10168 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) [2024-06-03 19:38:26,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:26,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:26,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:28,677 INFO L124 PetriNetUnfolderBase]: 6278/9704 cut-off events. [2024-06-03 19:38:28,677 INFO L125 PetriNetUnfolderBase]: For 1640356/1640360 co-relation queries the response was YES. [2024-06-03 19:38:28,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91601 conditions, 9704 events. 6278/9704 cut-off events. For 1640356/1640360 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 59609 event pairs, 1579 based on Foata normal form. 10/9713 useless extension candidates. Maximal degree in co-relation 91418. Up to 8933 conditions per place. [2024-06-03 19:38:28,851 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 156 changer transitions 0/644 dead transitions. [2024-06-03 19:38:28,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 644 transitions, 12103 flow [2024-06-03 19:38:28,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:28,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:28,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 138 transitions. [2024-06-03 19:38:28,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4107142857142857 [2024-06-03 19:38:28,852 INFO L175 Difference]: Start difference. First operand has 374 places, 615 transitions, 10168 flow. Second operand 8 states and 138 transitions. [2024-06-03 19:38:28,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 644 transitions, 12103 flow [2024-06-03 19:38:33,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 644 transitions, 11918 flow, removed 70 selfloop flow, removed 4 redundant places. [2024-06-03 19:38:33,679 INFO L231 Difference]: Finished difference. Result has 379 places, 621 transitions, 10507 flow [2024-06-03 19:38:33,680 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=9983, PETRI_DIFFERENCE_MINUEND_PLACES=370, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=615, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10507, PETRI_PLACES=379, PETRI_TRANSITIONS=621} [2024-06-03 19:38:33,680 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 336 predicate places. [2024-06-03 19:38:33,680 INFO L495 AbstractCegarLoop]: Abstraction has has 379 places, 621 transitions, 10507 flow [2024-06-03 19:38:33,680 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) [2024-06-03 19:38:33,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:33,681 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:33,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 19:38:33,681 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)] === [2024-06-03 19:38:33,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:33,681 INFO L85 PathProgramCache]: Analyzing trace with hash 1838844821, now seen corresponding path program 2 times [2024-06-03 19:38:33,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:33,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515660431] [2024-06-03 19:38:33,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:33,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:33,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:34,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:34,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515660431] [2024-06-03 19:38:34,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515660431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:34,376 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:34,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:34,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454246688] [2024-06-03 19:38:34,376 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:34,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:34,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:34,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:34,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:34,428 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:34,428 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 379 places, 621 transitions, 10507 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) [2024-06-03 19:38:34,429 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:34,429 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:34,429 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:36,904 INFO L124 PetriNetUnfolderBase]: 6283/9713 cut-off events. [2024-06-03 19:38:36,904 INFO L125 PetriNetUnfolderBase]: For 1646013/1646017 co-relation queries the response was YES. [2024-06-03 19:38:37,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 92460 conditions, 9713 events. 6283/9713 cut-off events. For 1646013/1646017 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 59729 event pairs, 1711 based on Foata normal form. 5/9717 useless extension candidates. Maximal degree in co-relation 92274. Up to 9617 conditions per place. [2024-06-03 19:38:37,074 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 595 selfloop transitions, 41 changer transitions 0/639 dead transitions. [2024-06-03 19:38:37,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 639 transitions, 11907 flow [2024-06-03 19:38:37,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:37,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:37,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 121 transitions. [2024-06-03 19:38:37,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3601190476190476 [2024-06-03 19:38:37,076 INFO L175 Difference]: Start difference. First operand has 379 places, 621 transitions, 10507 flow. Second operand 8 states and 121 transitions. [2024-06-03 19:38:37,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 639 transitions, 11907 flow [2024-06-03 19:38:42,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 639 transitions, 11543 flow, removed 25 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:42,317 INFO L231 Difference]: Finished difference. Result has 381 places, 624 transitions, 10315 flow [2024-06-03 19:38:42,318 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10143, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=621, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=580, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10315, PETRI_PLACES=381, PETRI_TRANSITIONS=624} [2024-06-03 19:38:42,318 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 338 predicate places. [2024-06-03 19:38:42,318 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 624 transitions, 10315 flow [2024-06-03 19:38:42,318 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) [2024-06-03 19:38:42,318 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:42,318 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:42,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 19:38:42,319 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)] === [2024-06-03 19:38:42,319 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:42,319 INFO L85 PathProgramCache]: Analyzing trace with hash 2011327829, now seen corresponding path program 5 times [2024-06-03 19:38:42,319 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:42,319 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182502360] [2024-06-03 19:38:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:42,320 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:42,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:43,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:43,092 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:43,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182502360] [2024-06-03 19:38:43,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182502360] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:43,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:43,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:43,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [101031700] [2024-06-03 19:38:43,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:43,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:43,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:43,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:43,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:43,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:43,159 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 624 transitions, 10315 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) [2024-06-03 19:38:43,159 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:43,159 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:43,159 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:45,473 INFO L124 PetriNetUnfolderBase]: 6317/9758 cut-off events. [2024-06-03 19:38:45,473 INFO L125 PetriNetUnfolderBase]: For 1697068/1697072 co-relation queries the response was YES. [2024-06-03 19:38:45,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93142 conditions, 9758 events. 6317/9758 cut-off events. For 1697068/1697072 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 59918 event pairs, 1598 based on Foata normal form. 6/9763 useless extension candidates. Maximal degree in co-relation 92956. Up to 9457 conditions per place. [2024-06-03 19:38:45,640 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 543 selfloop transitions, 106 changer transitions 0/652 dead transitions. [2024-06-03 19:38:45,641 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 652 transitions, 12153 flow [2024-06-03 19:38:45,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:45,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:38:45,642 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-03 19:38:45,642 INFO L175 Difference]: Start difference. First operand has 381 places, 624 transitions, 10315 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:38:45,642 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 652 transitions, 12153 flow [2024-06-03 19:38:51,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 382 places, 652 transitions, 12007 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:38:51,064 INFO L231 Difference]: Finished difference. Result has 384 places, 633 transitions, 10702 flow [2024-06-03 19:38:51,064 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10169, PETRI_DIFFERENCE_MINUEND_PLACES=375, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=518, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10702, PETRI_PLACES=384, PETRI_TRANSITIONS=633} [2024-06-03 19:38:51,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 341 predicate places. [2024-06-03 19:38:51,065 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 633 transitions, 10702 flow [2024-06-03 19:38:51,065 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) [2024-06-03 19:38:51,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:51,065 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:51,065 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 19:38:51,065 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)] === [2024-06-03 19:38:51,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:51,066 INFO L85 PathProgramCache]: Analyzing trace with hash 2011328201, now seen corresponding path program 3 times [2024-06-03 19:38:51,066 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:51,066 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433150] [2024-06-03 19:38:51,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:51,066 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:51,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:51,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:51,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433150] [2024-06-03 19:38:51,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433150] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:51,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:51,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:51,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560513346] [2024-06-03 19:38:51,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:51,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:51,855 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:51,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:51,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:51,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:51,910 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 633 transitions, 10702 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) [2024-06-03 19:38:51,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:51,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:51,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:38:54,258 INFO L124 PetriNetUnfolderBase]: 6322/9767 cut-off events. [2024-06-03 19:38:54,258 INFO L125 PetriNetUnfolderBase]: For 1724508/1724512 co-relation queries the response was YES. [2024-06-03 19:38:54,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93757 conditions, 9767 events. 6322/9767 cut-off events. For 1724508/1724512 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 60059 event pairs, 1712 based on Foata normal form. 5/9771 useless extension candidates. Maximal degree in co-relation 93569. Up to 9661 conditions per place. [2024-06-03 19:38:54,415 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 604 selfloop transitions, 44 changer transitions 0/651 dead transitions. [2024-06-03 19:38:54,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 651 transitions, 12132 flow [2024-06-03 19:38:54,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:38:54,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:38:54,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 123 transitions. [2024-06-03 19:38:54,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36607142857142855 [2024-06-03 19:38:54,416 INFO L175 Difference]: Start difference. First operand has 384 places, 633 transitions, 10702 flow. Second operand 8 states and 123 transitions. [2024-06-03 19:38:54,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 651 transitions, 12132 flow [2024-06-03 19:38:59,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 651 transitions, 11919 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:38:59,042 INFO L231 Difference]: Finished difference. Result has 387 places, 636 transitions, 10673 flow [2024-06-03 19:38:59,043 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10489, PETRI_DIFFERENCE_MINUEND_PLACES=379, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=633, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=589, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10673, PETRI_PLACES=387, PETRI_TRANSITIONS=636} [2024-06-03 19:38:59,043 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 344 predicate places. [2024-06-03 19:38:59,043 INFO L495 AbstractCegarLoop]: Abstraction has has 387 places, 636 transitions, 10673 flow [2024-06-03 19:38:59,043 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) [2024-06-03 19:38:59,043 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:38:59,043 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:38:59,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 19:38:59,044 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)] === [2024-06-03 19:38:59,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:38:59,044 INFO L85 PathProgramCache]: Analyzing trace with hash 2011207859, now seen corresponding path program 6 times [2024-06-03 19:38:59,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:38:59,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81794971] [2024-06-03 19:38:59,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:38:59,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:38:59,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:38:59,779 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:38:59,780 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:38:59,780 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81794971] [2024-06-03 19:38:59,780 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81794971] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:38:59,780 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:38:59,780 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:38:59,780 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [496226264] [2024-06-03 19:38:59,780 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:38:59,781 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:38:59,781 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:38:59,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:38:59,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:38:59,841 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:38:59,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 387 places, 636 transitions, 10673 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) [2024-06-03 19:38:59,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:38:59,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:38:59,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:02,555 INFO L124 PetriNetUnfolderBase]: 6316/9757 cut-off events. [2024-06-03 19:39:02,555 INFO L125 PetriNetUnfolderBase]: For 1749535/1749539 co-relation queries the response was YES. [2024-06-03 19:39:02,740 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93628 conditions, 9757 events. 6316/9757 cut-off events. For 1749535/1749539 co-relation queries the response was YES. Maximal size of possible extension queue 475. Compared 59939 event pairs, 1598 based on Foata normal form. 6/9762 useless extension candidates. Maximal degree in co-relation 93439. Up to 9508 conditions per place. [2024-06-03 19:39:02,785 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 552 selfloop transitions, 98 changer transitions 0/653 dead transitions. [2024-06-03 19:39:02,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 394 places, 653 transitions, 12035 flow [2024-06-03 19:39:02,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:02,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:02,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:39:02,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-03 19:39:02,787 INFO L175 Difference]: Start difference. First operand has 387 places, 636 transitions, 10673 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:39:02,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 394 places, 653 transitions, 12035 flow [2024-06-03 19:39:09,451 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 388 places, 653 transitions, 11877 flow, removed 37 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:09,459 INFO L231 Difference]: Finished difference. Result has 390 places, 637 transitions, 10739 flow [2024-06-03 19:39:09,461 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10515, PETRI_DIFFERENCE_MINUEND_PLACES=381, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=636, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=97, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=538, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10739, PETRI_PLACES=390, PETRI_TRANSITIONS=637} [2024-06-03 19:39:09,461 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 347 predicate places. [2024-06-03 19:39:09,461 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 637 transitions, 10739 flow [2024-06-03 19:39:09,461 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) [2024-06-03 19:39:09,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:09,462 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:09,462 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 19:39:09,462 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)] === [2024-06-03 19:39:09,462 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash 1715746673, now seen corresponding path program 1 times [2024-06-03 19:39:09,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:09,463 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756296057] [2024-06-03 19:39:09,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:09,463 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:09,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:10,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:10,557 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:10,557 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756296057] [2024-06-03 19:39:10,557 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756296057] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:10,557 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:10,557 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:10,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [992316523] [2024-06-03 19:39:10,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:10,558 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:10,558 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:10,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:10,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:10,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:39:10,650 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 637 transitions, 10739 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) [2024-06-03 19:39:10,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:10,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:39:10,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:13,579 INFO L124 PetriNetUnfolderBase]: 6344/9811 cut-off events. [2024-06-03 19:39:13,580 INFO L125 PetriNetUnfolderBase]: For 1840568/1840574 co-relation queries the response was YES. [2024-06-03 19:39:13,680 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93662 conditions, 9811 events. 6344/9811 cut-off events. For 1840568/1840574 co-relation queries the response was YES. Maximal size of possible extension queue 477. Compared 60397 event pairs, 1169 based on Foata normal form. 26/9836 useless extension candidates. Maximal degree in co-relation 93471. Up to 9279 conditions per place. [2024-06-03 19:39:13,715 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 533 selfloop transitions, 139 changer transitions 0/675 dead transitions. [2024-06-03 19:39:13,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 675 transitions, 12664 flow [2024-06-03 19:39:13,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:13,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 132 transitions. [2024-06-03 19:39:13,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.39285714285714285 [2024-06-03 19:39:13,716 INFO L175 Difference]: Start difference. First operand has 390 places, 637 transitions, 10739 flow. Second operand 8 states and 132 transitions. [2024-06-03 19:39:13,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 675 transitions, 12664 flow [2024-06-03 19:39:17,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 675 transitions, 12430 flow, removed 53 selfloop flow, removed 4 redundant places. [2024-06-03 19:39:17,905 INFO L231 Difference]: Finished difference. Result has 394 places, 649 transitions, 11083 flow [2024-06-03 19:39:17,906 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10505, PETRI_DIFFERENCE_MINUEND_PLACES=386, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=637, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=510, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11083, PETRI_PLACES=394, PETRI_TRANSITIONS=649} [2024-06-03 19:39:17,906 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 351 predicate places. [2024-06-03 19:39:17,906 INFO L495 AbstractCegarLoop]: Abstraction has has 394 places, 649 transitions, 11083 flow [2024-06-03 19:39:17,906 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) [2024-06-03 19:39:17,906 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:17,906 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:17,907 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 19:39:17,907 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)] === [2024-06-03 19:39:17,907 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:17,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1791373157, now seen corresponding path program 2 times [2024-06-03 19:39:17,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:17,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352977099] [2024-06-03 19:39:17,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:17,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:17,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:18,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:18,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:18,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352977099] [2024-06-03 19:39:18,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [352977099] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:18,927 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:18,928 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:18,928 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708362768] [2024-06-03 19:39:18,928 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:18,928 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:18,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:18,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:18,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:18,996 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:39:18,997 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 394 places, 649 transitions, 11083 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) [2024-06-03 19:39:18,997 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:18,997 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:39:18,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:21,885 INFO L124 PetriNetUnfolderBase]: 6353/9822 cut-off events. [2024-06-03 19:39:21,886 INFO L125 PetriNetUnfolderBase]: For 1792834/1792838 co-relation queries the response was YES. [2024-06-03 19:39:22,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93642 conditions, 9822 events. 6353/9822 cut-off events. For 1792834/1792838 co-relation queries the response was YES. Maximal size of possible extension queue 471. Compared 60437 event pairs, 1682 based on Foata normal form. 16/9837 useless extension candidates. Maximal degree in co-relation 93450. Up to 9541 conditions per place. [2024-06-03 19:39:22,052 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 563 selfloop transitions, 110 changer transitions 0/676 dead transitions. [2024-06-03 19:39:22,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 676 transitions, 12653 flow [2024-06-03 19:39:22,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:39:22,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:39:22,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 128 transitions. [2024-06-03 19:39:22,054 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38095238095238093 [2024-06-03 19:39:22,054 INFO L175 Difference]: Start difference. First operand has 394 places, 649 transitions, 11083 flow. Second operand 8 states and 128 transitions. [2024-06-03 19:39:22,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 676 transitions, 12653 flow [2024-06-03 19:39:27,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 396 places, 676 transitions, 12246 flow, removed 92 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:27,425 INFO L231 Difference]: Finished difference. Result has 397 places, 655 transitions, 11080 flow [2024-06-03 19:39:27,425 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10682, PETRI_DIFFERENCE_MINUEND_PLACES=389, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=649, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11080, PETRI_PLACES=397, PETRI_TRANSITIONS=655} [2024-06-03 19:39:27,425 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 354 predicate places. [2024-06-03 19:39:27,425 INFO L495 AbstractCegarLoop]: Abstraction has has 397 places, 655 transitions, 11080 flow [2024-06-03 19:39:27,426 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) [2024-06-03 19:39:27,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:27,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:27,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 19:39:27,426 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)] === [2024-06-03 19:39:27,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:27,426 INFO L85 PathProgramCache]: Analyzing trace with hash -1775211981, now seen corresponding path program 1 times [2024-06-03 19:39:27,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:27,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341643300] [2024-06-03 19:39:27,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:27,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:27,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:28,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:28,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:28,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341643300] [2024-06-03 19:39:28,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341643300] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:28,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:28,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:28,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953647662] [2024-06-03 19:39:28,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:28,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:28,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:28,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:28,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:28,340 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:39:28,341 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 397 places, 655 transitions, 11080 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) [2024-06-03 19:39:28,341 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:28,341 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:39:28,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:31,055 INFO L124 PetriNetUnfolderBase]: 6373/9850 cut-off events. [2024-06-03 19:39:31,055 INFO L125 PetriNetUnfolderBase]: For 1776480/1776484 co-relation queries the response was YES. [2024-06-03 19:39:31,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93736 conditions, 9850 events. 6373/9850 cut-off events. For 1776480/1776484 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 60626 event pairs, 1692 based on Foata normal form. 8/9857 useless extension candidates. Maximal degree in co-relation 93543. Up to 9415 conditions per place. [2024-06-03 19:39:31,230 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 557 selfloop transitions, 129 changer transitions 0/689 dead transitions. [2024-06-03 19:39:31,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 405 places, 689 transitions, 12876 flow [2024-06-03 19:39:31,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:31,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:31,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:39:31,231 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:39:31,231 INFO L175 Difference]: Start difference. First operand has 397 places, 655 transitions, 11080 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:39:31,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 405 places, 689 transitions, 12876 flow [2024-06-03 19:39:36,797 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 689 transitions, 12606 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 19:39:36,806 INFO L231 Difference]: Finished difference. Result has 400 places, 661 transitions, 11188 flow [2024-06-03 19:39:36,807 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=10810, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11188, PETRI_PLACES=400, PETRI_TRANSITIONS=661} [2024-06-03 19:39:36,807 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 357 predicate places. [2024-06-03 19:39:36,807 INFO L495 AbstractCegarLoop]: Abstraction has has 400 places, 661 transitions, 11188 flow [2024-06-03 19:39:36,807 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) [2024-06-03 19:39:36,807 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:36,807 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:36,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 19:39:36,808 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)] === [2024-06-03 19:39:36,808 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:36,808 INFO L85 PathProgramCache]: Analyzing trace with hash 2086949229, now seen corresponding path program 2 times [2024-06-03 19:39:36,808 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:36,808 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [569586711] [2024-06-03 19:39:36,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:36,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:36,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:37,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:37,741 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:37,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [569586711] [2024-06-03 19:39:37,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [569586711] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:37,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:37,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:37,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342904637] [2024-06-03 19:39:37,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:37,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:37,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:37,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:37,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:37,806 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:39:37,806 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 400 places, 661 transitions, 11188 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) [2024-06-03 19:39:37,806 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:37,806 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:39:37,806 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:40,713 INFO L124 PetriNetUnfolderBase]: 6457/9960 cut-off events. [2024-06-03 19:39:40,714 INFO L125 PetriNetUnfolderBase]: For 1860502/1860506 co-relation queries the response was YES. [2024-06-03 19:39:40,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96178 conditions, 9960 events. 6457/9960 cut-off events. For 1860502/1860506 co-relation queries the response was YES. Maximal size of possible extension queue 481. Compared 61142 event pairs, 1606 based on Foata normal form. 8/9967 useless extension candidates. Maximal degree in co-relation 95984. Up to 9479 conditions per place. [2024-06-03 19:39:40,939 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 559 selfloop transitions, 135 changer transitions 0/697 dead transitions. [2024-06-03 19:39:40,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 697 transitions, 13506 flow [2024-06-03 19:39:40,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:40,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:40,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:39:40,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:39:40,941 INFO L175 Difference]: Start difference. First operand has 400 places, 661 transitions, 11188 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:39:40,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 697 transitions, 13506 flow [2024-06-03 19:39:46,666 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 697 transitions, 13293 flow, removed 56 selfloop flow, removed 5 redundant places. [2024-06-03 19:39:46,675 INFO L231 Difference]: Finished difference. Result has 404 places, 670 transitions, 11431 flow [2024-06-03 19:39:46,675 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11023, PETRI_DIFFERENCE_MINUEND_PLACES=395, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=126, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=535, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11431, PETRI_PLACES=404, PETRI_TRANSITIONS=670} [2024-06-03 19:39:46,676 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 361 predicate places. [2024-06-03 19:39:46,676 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 670 transitions, 11431 flow [2024-06-03 19:39:46,676 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) [2024-06-03 19:39:46,676 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:46,676 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:46,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 19:39:46,676 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)] === [2024-06-03 19:39:46,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:46,677 INFO L85 PathProgramCache]: Analyzing trace with hash 2086603269, now seen corresponding path program 3 times [2024-06-03 19:39:46,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:46,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076206430] [2024-06-03 19:39:46,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:46,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:46,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:47,513 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:47,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076206430] [2024-06-03 19:39:47,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1076206430] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:47,513 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:47,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:47,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105011517] [2024-06-03 19:39:47,513 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:47,514 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:47,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:47,514 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:47,514 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:47,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:39:47,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 670 transitions, 11431 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) [2024-06-03 19:39:47,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:47,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:39:47,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:39:50,439 INFO L124 PetriNetUnfolderBase]: 6445/9944 cut-off events. [2024-06-03 19:39:50,439 INFO L125 PetriNetUnfolderBase]: For 1865910/1865914 co-relation queries the response was YES. [2024-06-03 19:39:50,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95857 conditions, 9944 events. 6445/9944 cut-off events. For 1865910/1865914 co-relation queries the response was YES. Maximal size of possible extension queue 480. Compared 61046 event pairs, 1602 based on Foata normal form. 8/9951 useless extension candidates. Maximal degree in co-relation 95661. Up to 9471 conditions per place. [2024-06-03 19:39:50,628 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 571 selfloop transitions, 123 changer transitions 0/697 dead transitions. [2024-06-03 19:39:50,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 412 places, 697 transitions, 13355 flow [2024-06-03 19:39:50,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:39:50,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:39:50,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 152 transitions. [2024-06-03 19:39:50,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4021164021164021 [2024-06-03 19:39:50,629 INFO L175 Difference]: Start difference. First operand has 404 places, 670 transitions, 11431 flow. Second operand 9 states and 152 transitions. [2024-06-03 19:39:50,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 412 places, 697 transitions, 13355 flow [2024-06-03 19:39:56,242 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 697 transitions, 13117 flow, removed 34 selfloop flow, removed 4 redundant places. [2024-06-03 19:39:56,251 INFO L231 Difference]: Finished difference. Result has 409 places, 670 transitions, 11445 flow [2024-06-03 19:39:56,252 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11193, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=547, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11445, PETRI_PLACES=409, PETRI_TRANSITIONS=670} [2024-06-03 19:39:56,252 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 366 predicate places. [2024-06-03 19:39:56,252 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 670 transitions, 11445 flow [2024-06-03 19:39:56,252 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) [2024-06-03 19:39:56,252 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:39:56,252 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:39:56,253 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 19:39:56,253 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)] === [2024-06-03 19:39:56,253 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:39:56,253 INFO L85 PathProgramCache]: Analyzing trace with hash -282122707, now seen corresponding path program 4 times [2024-06-03 19:39:56,253 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:39:56,254 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453836226] [2024-06-03 19:39:56,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:39:56,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:39:56,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:39:57,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:39:57,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:39:57,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453836226] [2024-06-03 19:39:57,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [453836226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:39:57,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:39:57,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:39:57,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060439003] [2024-06-03 19:39:57,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:39:57,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:39:57,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:39:57,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:39:57,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=67, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:39:57,153 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:39:57,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 670 transitions, 11445 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) [2024-06-03 19:39:57,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:39:57,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:39:57,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:00,249 INFO L124 PetriNetUnfolderBase]: 6433/9928 cut-off events. [2024-06-03 19:40:00,249 INFO L125 PetriNetUnfolderBase]: For 1873116/1873120 co-relation queries the response was YES. [2024-06-03 19:40:00,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95454 conditions, 9928 events. 6433/9928 cut-off events. For 1873116/1873120 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60953 event pairs, 1596 based on Foata normal form. 8/9935 useless extension candidates. Maximal degree in co-relation 95257. Up to 9463 conditions per place. [2024-06-03 19:40:00,415 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 554 selfloop transitions, 137 changer transitions 0/694 dead transitions. [2024-06-03 19:40:00,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 694 transitions, 13133 flow [2024-06-03 19:40:00,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 19:40:00,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 19:40:00,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 148 transitions. [2024-06-03 19:40:00,416 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3915343915343915 [2024-06-03 19:40:00,416 INFO L175 Difference]: Start difference. First operand has 409 places, 670 transitions, 11445 flow. Second operand 9 states and 148 transitions. [2024-06-03 19:40:00,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 694 transitions, 13133 flow [2024-06-03 19:40:05,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 694 transitions, 12831 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 19:40:05,933 INFO L231 Difference]: Finished difference. Result has 410 places, 670 transitions, 11423 flow [2024-06-03 19:40:05,934 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11143, PETRI_DIFFERENCE_MINUEND_PLACES=401, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=137, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11423, PETRI_PLACES=410, PETRI_TRANSITIONS=670} [2024-06-03 19:40:05,934 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-03 19:40:05,934 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 670 transitions, 11423 flow [2024-06-03 19:40:05,934 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) [2024-06-03 19:40:05,934 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:05,934 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:05,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 19:40:05,935 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)] === [2024-06-03 19:40:05,935 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:05,935 INFO L85 PathProgramCache]: Analyzing trace with hash 2011204883, now seen corresponding path program 3 times [2024-06-03 19:40:05,935 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:05,935 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944304051] [2024-06-03 19:40:05,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:05,935 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:05,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:06,992 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:06,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:06,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944304051] [2024-06-03 19:40:06,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944304051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:06,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:06,993 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-06-03 19:40:06,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150521653] [2024-06-03 19:40:06,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:06,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-06-03 19:40:06,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:06,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-06-03 19:40:06,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2024-06-03 19:40:07,101 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:40:07,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 670 transitions, 11423 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) [2024-06-03 19:40:07,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:07,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:40:07,102 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:09,777 INFO L124 PetriNetUnfolderBase]: 6431/9926 cut-off events. [2024-06-03 19:40:09,777 INFO L125 PetriNetUnfolderBase]: For 1891791/1891795 co-relation queries the response was YES. [2024-06-03 19:40:09,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95207 conditions, 9926 events. 6431/9926 cut-off events. For 1891791/1891795 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 60943 event pairs, 1603 based on Foata normal form. 10/9935 useless extension candidates. Maximal degree in co-relation 95009. Up to 9669 conditions per place. [2024-06-03 19:40:09,961 INFO L140 encePairwiseOnDemand]: 33/42 looper letters, 585 selfloop transitions, 100 changer transitions 0/688 dead transitions. [2024-06-03 19:40:09,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 688 transitions, 12896 flow [2024-06-03 19:40:09,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:09,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:09,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 124 transitions. [2024-06-03 19:40:09,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.36904761904761907 [2024-06-03 19:40:09,963 INFO L175 Difference]: Start difference. First operand has 410 places, 670 transitions, 11423 flow. Second operand 8 states and 124 transitions. [2024-06-03 19:40:09,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 688 transitions, 12896 flow [2024-06-03 19:40:16,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 409 places, 688 transitions, 12576 flow, removed 21 selfloop flow, removed 8 redundant places. [2024-06-03 19:40:16,075 INFO L231 Difference]: Finished difference. Result has 410 places, 672 transitions, 11369 flow [2024-06-03 19:40:16,075 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11103, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=98, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=570, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11369, PETRI_PLACES=410, PETRI_TRANSITIONS=672} [2024-06-03 19:40:16,075 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 367 predicate places. [2024-06-03 19:40:16,075 INFO L495 AbstractCegarLoop]: Abstraction has has 410 places, 672 transitions, 11369 flow [2024-06-03 19:40:16,076 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) [2024-06-03 19:40:16,076 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:16,076 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:16,076 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 19:40:16,076 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)] === [2024-06-03 19:40:16,076 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:16,076 INFO L85 PathProgramCache]: Analyzing trace with hash 258596659, now seen corresponding path program 7 times [2024-06-03 19:40:16,077 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:16,077 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438158396] [2024-06-03 19:40:16,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:16,077 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:16,961 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:16,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:16,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438158396] [2024-06-03 19:40:16,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438158396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:16,962 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:16,962 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:16,962 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [614185243] [2024-06-03 19:40:16,962 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:16,962 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:16,962 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:16,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:16,963 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:17,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:40:17,045 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 410 places, 672 transitions, 11369 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) [2024-06-03 19:40:17,045 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:17,045 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:40:17,045 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:19,609 INFO L124 PetriNetUnfolderBase]: 6461/9971 cut-off events. [2024-06-03 19:40:19,610 INFO L125 PetriNetUnfolderBase]: For 1925268/1925274 co-relation queries the response was YES. [2024-06-03 19:40:19,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 95587 conditions, 9971 events. 6461/9971 cut-off events. For 1925268/1925274 co-relation queries the response was YES. Maximal size of possible extension queue 483. Compared 61268 event pairs, 1527 based on Foata normal form. 12/9982 useless extension candidates. Maximal degree in co-relation 95388. Up to 8690 conditions per place. [2024-06-03 19:40:19,796 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 485 selfloop transitions, 217 changer transitions 0/705 dead transitions. [2024-06-03 19:40:19,796 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 705 transitions, 13681 flow [2024-06-03 19:40:19,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:19,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:19,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 145 transitions. [2024-06-03 19:40:19,797 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.43154761904761907 [2024-06-03 19:40:19,797 INFO L175 Difference]: Start difference. First operand has 410 places, 672 transitions, 11369 flow. Second operand 8 states and 145 transitions. [2024-06-03 19:40:19,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 705 transitions, 13681 flow [2024-06-03 19:40:27,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 705 transitions, 13460 flow, removed 24 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:27,122 INFO L231 Difference]: Finished difference. Result has 413 places, 679 transitions, 11729 flow [2024-06-03 19:40:27,122 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11148, PETRI_DIFFERENCE_MINUEND_PLACES=405, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=672, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=210, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11729, PETRI_PLACES=413, PETRI_TRANSITIONS=679} [2024-06-03 19:40:27,122 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 370 predicate places. [2024-06-03 19:40:27,122 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 679 transitions, 11729 flow [2024-06-03 19:40:27,122 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) [2024-06-03 19:40:27,122 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:27,123 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:27,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 19:40:27,123 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)] === [2024-06-03 19:40:27,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:27,123 INFO L85 PathProgramCache]: Analyzing trace with hash 258895561, now seen corresponding path program 4 times [2024-06-03 19:40:27,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:27,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456477441] [2024-06-03 19:40:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:27,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:27,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:27,917 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:27,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:27,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456477441] [2024-06-03 19:40:27,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456477441] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:27,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:27,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:27,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362873202] [2024-06-03 19:40:27,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:27,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:27,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:27,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:27,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:27,999 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:40:27,999 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 679 transitions, 11729 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) [2024-06-03 19:40:27,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:27,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:40:27,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:30,843 INFO L124 PetriNetUnfolderBase]: 6471/9985 cut-off events. [2024-06-03 19:40:30,843 INFO L125 PetriNetUnfolderBase]: For 1933423/1933431 co-relation queries the response was YES. [2024-06-03 19:40:30,960 INFO L83 FinitePrefix]: Finished finitePrefix Result has 96661 conditions, 9985 events. 6471/9985 cut-off events. For 1933423/1933431 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 61410 event pairs, 1727 based on Foata normal form. 10/9994 useless extension candidates. Maximal degree in co-relation 96461. Up to 9658 conditions per place. [2024-06-03 19:40:30,999 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 631 selfloop transitions, 88 changer transitions 0/722 dead transitions. [2024-06-03 19:40:30,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 420 places, 722 transitions, 14097 flow [2024-06-03 19:40:31,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:31,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:31,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 131 transitions. [2024-06-03 19:40:31,000 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3898809523809524 [2024-06-03 19:40:31,000 INFO L175 Difference]: Start difference. First operand has 413 places, 679 transitions, 11729 flow. Second operand 8 states and 131 transitions. [2024-06-03 19:40:31,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 420 places, 722 transitions, 14097 flow [2024-06-03 19:40:36,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 415 places, 722 transitions, 13677 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-06-03 19:40:36,217 INFO L231 Difference]: Finished difference. Result has 417 places, 699 transitions, 11855 flow [2024-06-03 19:40:36,217 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11309, PETRI_DIFFERENCE_MINUEND_PLACES=408, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=595, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11855, PETRI_PLACES=417, PETRI_TRANSITIONS=699} [2024-06-03 19:40:36,217 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 374 predicate places. [2024-06-03 19:40:36,218 INFO L495 AbstractCegarLoop]: Abstraction has has 417 places, 699 transitions, 11855 flow [2024-06-03 19:40:36,218 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) [2024-06-03 19:40:36,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:36,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:36,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 19:40:36,218 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)] === [2024-06-03 19:40:36,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:36,219 INFO L85 PathProgramCache]: Analyzing trace with hash 258895189, now seen corresponding path program 8 times [2024-06-03 19:40:36,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:36,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987627236] [2024-06-03 19:40:36,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:36,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:36,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:37,056 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:37,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:37,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987627236] [2024-06-03 19:40:37,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987627236] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:37,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:37,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:37,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256747408] [2024-06-03 19:40:37,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:37,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:37,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:37,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:37,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:37,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:40:37,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 417 places, 699 transitions, 11855 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) [2024-06-03 19:40:37,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:37,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:40:37,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:39,770 INFO L124 PetriNetUnfolderBase]: 6529/10066 cut-off events. [2024-06-03 19:40:39,770 INFO L125 PetriNetUnfolderBase]: For 2013990/2013996 co-relation queries the response was YES. [2024-06-03 19:40:39,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 97783 conditions, 10066 events. 6529/10066 cut-off events. For 2013990/2013996 co-relation queries the response was YES. Maximal size of possible extension queue 491. Compared 61860 event pairs, 1548 based on Foata normal form. 12/10077 useless extension candidates. Maximal degree in co-relation 97581. Up to 8752 conditions per place. [2024-06-03 19:40:39,961 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 507 selfloop transitions, 223 changer transitions 0/733 dead transitions. [2024-06-03 19:40:39,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 733 transitions, 14294 flow [2024-06-03 19:40:39,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:39,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:39,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 142 transitions. [2024-06-03 19:40:39,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4226190476190476 [2024-06-03 19:40:39,962 INFO L175 Difference]: Start difference. First operand has 417 places, 699 transitions, 11855 flow. Second operand 8 states and 142 transitions. [2024-06-03 19:40:39,962 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 733 transitions, 14294 flow [2024-06-03 19:40:47,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 421 places, 733 transitions, 14086 flow, removed 85 selfloop flow, removed 3 redundant places. [2024-06-03 19:40:47,068 INFO L231 Difference]: Finished difference. Result has 423 places, 710 transitions, 12341 flow [2024-06-03 19:40:47,077 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11647, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=699, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=212, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=484, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12341, PETRI_PLACES=423, PETRI_TRANSITIONS=710} [2024-06-03 19:40:47,077 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 380 predicate places. [2024-06-03 19:40:47,077 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 710 transitions, 12341 flow [2024-06-03 19:40:47,077 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) [2024-06-03 19:40:47,077 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:47,077 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:47,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 19:40:47,078 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)] === [2024-06-03 19:40:47,078 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:47,078 INFO L85 PathProgramCache]: Analyzing trace with hash 302243143, now seen corresponding path program 5 times [2024-06-03 19:40:47,078 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:47,078 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266737969] [2024-06-03 19:40:47,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:47,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:47,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:47,840 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:47,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:47,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266737969] [2024-06-03 19:40:47,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266737969] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:47,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:47,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:47,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568944355] [2024-06-03 19:40:47,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:47,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:47,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:47,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:47,841 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:47,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:40:47,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 710 transitions, 12341 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) [2024-06-03 19:40:47,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:47,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:40:47,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:40:50,605 INFO L124 PetriNetUnfolderBase]: 6555/10102 cut-off events. [2024-06-03 19:40:50,605 INFO L125 PetriNetUnfolderBase]: For 2036919/2036927 co-relation queries the response was YES. [2024-06-03 19:40:50,764 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99195 conditions, 10102 events. 6555/10102 cut-off events. For 2036919/2036927 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62178 event pairs, 1730 based on Foata normal form. 10/10111 useless extension candidates. Maximal degree in co-relation 98990. Up to 9764 conditions per place. [2024-06-03 19:40:50,812 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 638 selfloop transitions, 97 changer transitions 0/738 dead transitions. [2024-06-03 19:40:50,812 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 738 transitions, 14624 flow [2024-06-03 19:40:50,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:40:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:40:50,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 129 transitions. [2024-06-03 19:40:50,814 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.38392857142857145 [2024-06-03 19:40:50,814 INFO L175 Difference]: Start difference. First operand has 423 places, 710 transitions, 12341 flow. Second operand 8 states and 129 transitions. [2024-06-03 19:40:50,814 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 738 transitions, 14624 flow [2024-06-03 19:40:56,773 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 738 transitions, 14235 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 19:40:56,796 INFO L231 Difference]: Finished difference. Result has 429 places, 720 transitions, 12426 flow [2024-06-03 19:40:56,811 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=11952, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=87, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12426, PETRI_PLACES=429, PETRI_TRANSITIONS=720} [2024-06-03 19:40:56,811 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 386 predicate places. [2024-06-03 19:40:56,812 INFO L495 AbstractCegarLoop]: Abstraction has has 429 places, 720 transitions, 12426 flow [2024-06-03 19:40:56,812 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) [2024-06-03 19:40:56,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:40:56,813 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:40:56,813 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 19:40:56,813 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)] === [2024-06-03 19:40:56,814 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:40:56,814 INFO L85 PathProgramCache]: Analyzing trace with hash 613574311, now seen corresponding path program 6 times [2024-06-03 19:40:56,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:40:56,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308685330] [2024-06-03 19:40:56,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:40:56,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:40:56,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:40:57,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:40:57,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:40:57,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308685330] [2024-06-03 19:40:57,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1308685330] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:40:57,629 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:40:57,629 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:40:57,629 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537871190] [2024-06-03 19:40:57,629 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:40:57,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:40:57,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:40:57,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:40:57,630 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:40:57,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:40:57,676 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 429 places, 720 transitions, 12426 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) [2024-06-03 19:40:57,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:40:57,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:40:57,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:00,571 INFO L124 PetriNetUnfolderBase]: 6549/10094 cut-off events. [2024-06-03 19:41:00,571 INFO L125 PetriNetUnfolderBase]: For 2055994/2056002 co-relation queries the response was YES. [2024-06-03 19:41:00,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98828 conditions, 10094 events. 6549/10094 cut-off events. For 2055994/2056002 co-relation queries the response was YES. Maximal size of possible extension queue 495. Compared 62102 event pairs, 1734 based on Foata normal form. 10/10103 useless extension candidates. Maximal degree in co-relation 98620. Up to 9759 conditions per place. [2024-06-03 19:41:00,744 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 635 selfloop transitions, 99 changer transitions 0/737 dead transitions. [2024-06-03 19:41:00,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 436 places, 737 transitions, 14248 flow [2024-06-03 19:41:00,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:00,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:00,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 127 transitions. [2024-06-03 19:41:00,745 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.37797619047619047 [2024-06-03 19:41:00,745 INFO L175 Difference]: Start difference. First operand has 429 places, 720 transitions, 12426 flow. Second operand 8 states and 127 transitions. [2024-06-03 19:41:00,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 436 places, 737 transitions, 14248 flow [2024-06-03 19:41:08,021 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 737 transitions, 13981 flow, removed 86 selfloop flow, removed 3 redundant places. [2024-06-03 19:41:08,030 INFO L231 Difference]: Finished difference. Result has 434 places, 720 transitions, 12364 flow [2024-06-03 19:41:08,031 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12159, PETRI_DIFFERENCE_MINUEND_PLACES=426, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=621, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12364, PETRI_PLACES=434, PETRI_TRANSITIONS=720} [2024-06-03 19:41:08,031 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 391 predicate places. [2024-06-03 19:41:08,031 INFO L495 AbstractCegarLoop]: Abstraction has has 434 places, 720 transitions, 12364 flow [2024-06-03 19:41:08,031 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) [2024-06-03 19:41:08,031 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:08,032 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:08,032 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 19:41:08,032 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)] === [2024-06-03 19:41:08,032 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:08,032 INFO L85 PathProgramCache]: Analyzing trace with hash 269072179, now seen corresponding path program 9 times [2024-06-03 19:41:08,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:08,032 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749283332] [2024-06-03 19:41:08,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:08,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:08,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:08,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:08,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:08,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749283332] [2024-06-03 19:41:08,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749283332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:08,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:08,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:08,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560001098] [2024-06-03 19:41:08,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:08,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:08,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:08,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:08,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:08,907 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:41:08,907 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 434 places, 720 transitions, 12364 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) [2024-06-03 19:41:08,907 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:08,908 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:41:08,908 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:12,087 INFO L124 PetriNetUnfolderBase]: 6551/10098 cut-off events. [2024-06-03 19:41:12,087 INFO L125 PetriNetUnfolderBase]: For 2089095/2089101 co-relation queries the response was YES. [2024-06-03 19:41:12,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98592 conditions, 10098 events. 6551/10098 cut-off events. For 2089095/2089101 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 62047 event pairs, 1526 based on Foata normal form. 12/10109 useless extension candidates. Maximal degree in co-relation 98383. Up to 8783 conditions per place. [2024-06-03 19:41:12,377 INFO L140 encePairwiseOnDemand]: 30/42 looper letters, 496 selfloop transitions, 244 changer transitions 0/743 dead transitions. [2024-06-03 19:41:12,377 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 441 places, 743 transitions, 14698 flow [2024-06-03 19:41:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:12,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:12,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-06-03 19:41:12,378 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.41369047619047616 [2024-06-03 19:41:12,378 INFO L175 Difference]: Start difference. First operand has 434 places, 720 transitions, 12364 flow. Second operand 8 states and 139 transitions. [2024-06-03 19:41:12,378 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 441 places, 743 transitions, 14698 flow [2024-06-03 19:41:19,056 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 743 transitions, 14499 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 19:41:19,064 INFO L231 Difference]: Finished difference. Result has 436 places, 723 transitions, 12740 flow [2024-06-03 19:41:19,065 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12165, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=720, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=241, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=478, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12740, PETRI_PLACES=436, PETRI_TRANSITIONS=723} [2024-06-03 19:41:19,065 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 393 predicate places. [2024-06-03 19:41:19,065 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 723 transitions, 12740 flow [2024-06-03 19:41:19,065 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) [2024-06-03 19:41:19,065 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:19,066 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:19,066 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 19:41:19,066 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)] === [2024-06-03 19:41:19,066 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:19,066 INFO L85 PathProgramCache]: Analyzing trace with hash -217833693, now seen corresponding path program 7 times [2024-06-03 19:41:19,067 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:19,067 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041291063] [2024-06-03 19:41:19,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:19,067 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:19,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:19,899 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:19,900 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:19,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041291063] [2024-06-03 19:41:19,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2041291063] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:19,900 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:19,900 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:19,900 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864976149] [2024-06-03 19:41:19,900 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:19,900 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:19,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:19,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:19,901 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:19,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:41:19,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 723 transitions, 12740 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) [2024-06-03 19:41:19,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:19,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:41:19,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:23,331 INFO L124 PetriNetUnfolderBase]: 6564/10116 cut-off events. [2024-06-03 19:41:23,331 INFO L125 PetriNetUnfolderBase]: For 2099057/2099065 co-relation queries the response was YES. [2024-06-03 19:41:23,456 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99937 conditions, 10116 events. 6564/10116 cut-off events. For 2099057/2099065 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62183 event pairs, 1720 based on Foata normal form. 9/10124 useless extension candidates. Maximal degree in co-relation 99727. Up to 10007 conditions per place. [2024-06-03 19:41:23,495 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 690 selfloop transitions, 49 changer transitions 0/742 dead transitions. [2024-06-03 19:41:23,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 742 transitions, 14698 flow [2024-06-03 19:41:23,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:23,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:23,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 116 transitions. [2024-06-03 19:41:23,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.34523809523809523 [2024-06-03 19:41:23,496 INFO L175 Difference]: Start difference. First operand has 436 places, 723 transitions, 12740 flow. Second operand 8 states and 116 transitions. [2024-06-03 19:41:23,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 742 transitions, 14698 flow [2024-06-03 19:41:30,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 742 transitions, 14034 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-03 19:41:30,026 INFO L231 Difference]: Finished difference. Result has 437 places, 731 transitions, 12415 flow [2024-06-03 19:41:30,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12076, PETRI_DIFFERENCE_MINUEND_PLACES=428, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=675, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12415, PETRI_PLACES=437, PETRI_TRANSITIONS=731} [2024-06-03 19:41:30,026 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 394 predicate places. [2024-06-03 19:41:30,026 INFO L495 AbstractCegarLoop]: Abstraction has has 437 places, 731 transitions, 12415 flow [2024-06-03 19:41:30,026 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) [2024-06-03 19:41:30,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:30,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:30,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 19:41:30,027 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)] === [2024-06-03 19:41:30,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:30,040 INFO L85 PathProgramCache]: Analyzing trace with hash -1093486297, now seen corresponding path program 8 times [2024-06-03 19:41:30,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:30,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777653409] [2024-06-03 19:41:30,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:30,042 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:30,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:30,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:30,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:30,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777653409] [2024-06-03 19:41:30,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777653409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:30,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:30,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:30,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224340046] [2024-06-03 19:41:30,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:30,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:30,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:30,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:30,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:30,913 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:41:30,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 437 places, 731 transitions, 12415 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) [2024-06-03 19:41:30,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:30,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:41:30,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:34,146 INFO L124 PetriNetUnfolderBase]: 6561/10112 cut-off events. [2024-06-03 19:41:34,147 INFO L125 PetriNetUnfolderBase]: For 2119683/2119691 co-relation queries the response was YES. [2024-06-03 19:41:34,286 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99049 conditions, 10112 events. 6561/10112 cut-off events. For 2119683/2119691 co-relation queries the response was YES. Maximal size of possible extension queue 499. Compared 62168 event pairs, 1720 based on Foata normal form. 9/10120 useless extension candidates. Maximal degree in co-relation 98838. Up to 10006 conditions per place. [2024-06-03 19:41:34,335 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 699 selfloop transitions, 43 changer transitions 0/745 dead transitions. [2024-06-03 19:41:34,335 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 745 transitions, 14283 flow [2024-06-03 19:41:34,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:34,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:34,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 117 transitions. [2024-06-03 19:41:34,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3482142857142857 [2024-06-03 19:41:34,336 INFO L175 Difference]: Start difference. First operand has 437 places, 731 transitions, 12415 flow. Second operand 8 states and 117 transitions. [2024-06-03 19:41:34,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 745 transitions, 14283 flow [2024-06-03 19:41:40,701 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 745 transitions, 14128 flow, removed 55 selfloop flow, removed 4 redundant places. [2024-06-03 19:41:40,710 INFO L231 Difference]: Finished difference. Result has 441 places, 734 transitions, 12468 flow [2024-06-03 19:41:40,711 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12260, PETRI_DIFFERENCE_MINUEND_PLACES=433, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=731, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=688, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12468, PETRI_PLACES=441, PETRI_TRANSITIONS=734} [2024-06-03 19:41:40,711 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 398 predicate places. [2024-06-03 19:41:40,711 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 734 transitions, 12468 flow [2024-06-03 19:41:40,711 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) [2024-06-03 19:41:40,711 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:40,712 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:40,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 19:41:40,714 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)] === [2024-06-03 19:41:40,714 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:40,714 INFO L85 PathProgramCache]: Analyzing trace with hash -961726809, now seen corresponding path program 9 times [2024-06-03 19:41:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:40,716 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192315217] [2024-06-03 19:41:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:40,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:40,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:41,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:41,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:41,487 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192315217] [2024-06-03 19:41:41,487 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [192315217] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:41,487 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:41,487 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:41,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553912178] [2024-06-03 19:41:41,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:41,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:41,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:41,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:41,488 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:41,576 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:41:41,577 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 734 transitions, 12468 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) [2024-06-03 19:41:41,577 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:41,577 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:41:41,577 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:44,821 INFO L124 PetriNetUnfolderBase]: 6566/10119 cut-off events. [2024-06-03 19:41:44,821 INFO L125 PetriNetUnfolderBase]: For 2154075/2154083 co-relation queries the response was YES. [2024-06-03 19:41:44,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99490 conditions, 10119 events. 6566/10119 cut-off events. For 2154075/2154083 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 62210 event pairs, 1718 based on Foata normal form. 9/10127 useless extension candidates. Maximal degree in co-relation 99277. Up to 9978 conditions per place. [2024-06-03 19:41:44,986 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 682 selfloop transitions, 69 changer transitions 0/754 dead transitions. [2024-06-03 19:41:44,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 448 places, 754 transitions, 14704 flow [2024-06-03 19:41:44,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:44,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:44,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 19:41:44,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-03 19:41:44,989 INFO L175 Difference]: Start difference. First operand has 441 places, 734 transitions, 12468 flow. Second operand 8 states and 119 transitions. [2024-06-03 19:41:44,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 448 places, 754 transitions, 14704 flow [2024-06-03 19:41:51,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 754 transitions, 14539 flow, removed 46 selfloop flow, removed 5 redundant places. [2024-06-03 19:41:51,630 INFO L231 Difference]: Finished difference. Result has 445 places, 742 transitions, 12685 flow [2024-06-03 19:41:51,630 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12303, PETRI_DIFFERENCE_MINUEND_PLACES=436, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=734, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=64, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=668, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12685, PETRI_PLACES=445, PETRI_TRANSITIONS=742} [2024-06-03 19:41:51,630 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 402 predicate places. [2024-06-03 19:41:51,630 INFO L495 AbstractCegarLoop]: Abstraction has has 445 places, 742 transitions, 12685 flow [2024-06-03 19:41:51,631 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) [2024-06-03 19:41:51,631 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:41:51,631 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:41:51,631 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 19:41:51,631 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)] === [2024-06-03 19:41:51,631 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:41:51,631 INFO L85 PathProgramCache]: Analyzing trace with hash 1616103877, now seen corresponding path program 10 times [2024-06-03 19:41:51,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:41:51,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104581653] [2024-06-03 19:41:51,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:41:51,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:41:51,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:41:52,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:41:52,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:41:52,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104581653] [2024-06-03 19:41:52,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104581653] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:41:52,349 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:41:52,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:41:52,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425019568] [2024-06-03 19:41:52,350 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:41:52,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:41:52,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:41:52,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:41:52,350 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:41:52,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:41:52,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 445 places, 742 transitions, 12685 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) [2024-06-03 19:41:52,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:41:52,401 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:41:52,401 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:41:55,857 INFO L124 PetriNetUnfolderBase]: 6571/10126 cut-off events. [2024-06-03 19:41:55,857 INFO L125 PetriNetUnfolderBase]: For 2189238/2189246 co-relation queries the response was YES. [2024-06-03 19:41:55,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99968 conditions, 10126 events. 6571/10126 cut-off events. For 2189238/2189246 co-relation queries the response was YES. Maximal size of possible extension queue 501. Compared 62271 event pairs, 1720 based on Foata normal form. 9/10134 useless extension candidates. Maximal degree in co-relation 99753. Up to 10029 conditions per place. [2024-06-03 19:41:56,031 INFO L140 encePairwiseOnDemand]: 32/42 looper letters, 711 selfloop transitions, 41 changer transitions 0/755 dead transitions. [2024-06-03 19:41:56,032 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 755 transitions, 14309 flow [2024-06-03 19:41:56,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:41:56,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:41:56,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 114 transitions. [2024-06-03 19:41:56,033 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3392857142857143 [2024-06-03 19:41:56,033 INFO L175 Difference]: Start difference. First operand has 445 places, 742 transitions, 12685 flow. Second operand 8 states and 114 transitions. [2024-06-03 19:41:56,033 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 755 transitions, 14309 flow [2024-06-03 19:42:02,853 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 447 places, 755 transitions, 14075 flow, removed 63 selfloop flow, removed 5 redundant places. [2024-06-03 19:42:02,862 INFO L231 Difference]: Finished difference. Result has 448 places, 745 transitions, 12635 flow [2024-06-03 19:42:02,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12457, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=742, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=701, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12635, PETRI_PLACES=448, PETRI_TRANSITIONS=745} [2024-06-03 19:42:02,863 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 405 predicate places. [2024-06-03 19:42:02,863 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 745 transitions, 12635 flow [2024-06-03 19:42:02,863 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) [2024-06-03 19:42:02,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:02,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:02,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 19:42:02,863 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)] === [2024-06-03 19:42:02,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:02,864 INFO L85 PathProgramCache]: Analyzing trace with hash 581789987, now seen corresponding path program 10 times [2024-06-03 19:42:02,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:02,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198059040] [2024-06-03 19:42:02,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:02,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:02,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:03,597 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:03,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:03,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198059040] [2024-06-03 19:42:03,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198059040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:03,597 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:03,597 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:03,597 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513774515] [2024-06-03 19:42:03,598 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:03,598 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:03,598 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:03,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:03,598 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:03,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:42:03,665 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 745 transitions, 12635 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) [2024-06-03 19:42:03,665 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:03,665 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:42:03,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 19:42:07,076 INFO L124 PetriNetUnfolderBase]: 6561/10112 cut-off events. [2024-06-03 19:42:07,077 INFO L125 PetriNetUnfolderBase]: For 2211128/2211134 co-relation queries the response was YES. [2024-06-03 19:42:07,200 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99598 conditions, 10112 events. 6561/10112 cut-off events. For 2211128/2211134 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 62130 event pairs, 1608 based on Foata normal form. 8/10119 useless extension candidates. Maximal degree in co-relation 99382. Up to 9864 conditions per place. [2024-06-03 19:42:07,237 INFO L140 encePairwiseOnDemand]: 31/42 looper letters, 658 selfloop transitions, 95 changer transitions 0/756 dead transitions. [2024-06-03 19:42:07,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 756 transitions, 14175 flow [2024-06-03 19:42:07,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 19:42:07,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 19:42:07,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 119 transitions. [2024-06-03 19:42:07,238 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.3541666666666667 [2024-06-03 19:42:07,238 INFO L175 Difference]: Start difference. First operand has 448 places, 745 transitions, 12635 flow. Second operand 8 states and 119 transitions. [2024-06-03 19:42:07,238 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 756 transitions, 14175 flow [2024-06-03 19:42:14,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 756 transitions, 14025 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 19:42:14,022 INFO L231 Difference]: Finished difference. Result has 450 places, 745 transitions, 12681 flow [2024-06-03 19:42:14,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=42, PETRI_DIFFERENCE_MINUEND_FLOW=12485, PETRI_DIFFERENCE_MINUEND_PLACES=442, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=745, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=650, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=12681, PETRI_PLACES=450, PETRI_TRANSITIONS=745} [2024-06-03 19:42:14,023 INFO L281 CegarLoopForPetriNet]: 43 programPoint places, 407 predicate places. [2024-06-03 19:42:14,023 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 745 transitions, 12681 flow [2024-06-03 19:42:14,023 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) [2024-06-03 19:42:14,023 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 19:42:14,023 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 19:42:14,023 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 19:42:14,023 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)] === [2024-06-03 19:42:14,024 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 19:42:14,024 INFO L85 PathProgramCache]: Analyzing trace with hash 908021597, now seen corresponding path program 11 times [2024-06-03 19:42:14,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 19:42:14,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1114136173] [2024-06-03 19:42:14,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 19:42:14,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 19:42:14,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 19:42:14,759 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 19:42:14,760 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 19:42:14,760 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1114136173] [2024-06-03 19:42:14,760 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1114136173] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 19:42:14,760 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 19:42:14,760 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 19:42:14,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55559858] [2024-06-03 19:42:14,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 19:42:14,761 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 19:42:14,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 19:42:14,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 19:42:14,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 19:42:14,820 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 7 out of 42 [2024-06-03 19:42:14,820 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 745 transitions, 12681 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) [2024-06-03 19:42:14,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 19:42:14,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 7 of 42 [2024-06-03 19:42:14,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand